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MRL-7

Data Logger

User Manual Manual Version: V01

2017-06-30

SOMMER GmbH

All rights reserved.

The copyrights for this manual are exclusively at the company

SOMMER GmbH A-6842 Koblach

This manual may only be multiplied or passed on to third-parties with written permission of the company SOMMER. This applies also if only excerpts of this manual are copied or passed on.

The same conditions apply for the passing on in digital form.

SOMMER GmbH

Strassenhaeuser 27

6842 Koblach

Austria

www.sommer.at

Distributed exclusively in the USA bywww.hydrologicalusa.com

http://www.sommer.at/

CE compliance

This product is in conformity with the following standards

EN 60950-1

EN 61326-1

EN 61010

following the provision of directive R&TTE 1999/5/EC.

Information regarding images – image disclaimer

All images used in this manual are for illustrative purposes only. The actual product, the scope of delivery or individual features may vary.

Safety information

Please read this entire manual before setting up or operating this equipment. The non-compliance of this manual could result in damage to the equipment. Also in the case of non-compliance injuries of individuals cannot be excluded totally.

To make sure that the protection provided of and by this equipment is not impaired, do not use or install this equipment in any manner other than that specified in this manual.

Table of contents

1. Overview of the installation steps ...................................................................................... 1

2. Logger functions and interfaces ......................................................................................... 2

2.1. MRL-7 key functions and features ................................................................................... 2 2.2. Measurement and data storage concept .......................................................................... 3

2.2.1. Performing measurements ......................................................................................... 3 Analogue measurement example ....................................................................... 3 RS-485 measurement example .......................................................................... 3 SDI-12 measurement example ........................................................................... 4

2.2.2. Storing of measurement results and storage options .................................................. 5 2.2.3. Conditional storage .................................................................................................... 5

2.3. User interfaces ................................................................................................................ 6 2.3.1. Keyboard and display ................................................................................................. 6 2.3.2. Display menu structure .............................................................................................. 6 2.3.3. Parameterisation and data transfer ............................................................................ 7

2.4. Sensor connections and sensor power supply ................................................................. 7 2.4.1. Analogue interfaces ................................................................................................... 7 2.4.1. Digital interfaces ........................................................................................................ 8

SDI-12 ................................................................................................................ 8 RS-485 ............................................................................................................... 9

3. Hardware ............................................................................................................................ 10

3.1. How to open the housing ............................................................................................... 12 3.2. Mounting the MRL-7 ...................................................................................................... 13 3.3. Modem .......................................................................................................................... 14 3.4. Micro SIM Card, Micro SD Card and Button Cell Battery ............................................... 14

3.4.1. Insert / Exchange of Micro SIM Card ........................................................................ 15 3.4.2. Insert / Exchange of Micro SD Card ......................................................................... 16 3.4.3. Exchange of button cell ............................................................................................ 17

3.5. Pin description ............................................................................................................... 18 3.6. Spring Clips ................................................................................................................... 21

4. USB ..................................................................................................................................... 23

4.1. Requirements for flash drive .......................................................................................... 23 4.2. Reading out data via USB ............................................................................................. 23

5. MRL-7 keyboard operation ................................................................................................ 25

5.1. Description of keyboard buttons, navigating the menu ................................................... 25 5.2. Activating the display ..................................................................................................... 26 5.3. Deactivating the display ................................................................................................. 26 5.4. Reading (current) measurement values ......................................................................... 26 5.5. Adjusting measurement values ...................................................................................... 26 5.6. Settings ......................................................................................................................... 27

6. Parameterisation ................................................................................................................ 29

6.1. Commander ................................................................................................................... 29 6.2. Defining a local connection with the MRL-7 ................................................................... 29

6.2.1. RS-232 ..................................................................................................................... 30 6.2.2. Bluetooth .................................................................................................................. 34

6.3. Commander: Establishing a connection ......................................................................... 39 6.4. Defining a station ........................................................................................................... 40 6.5. Establish a connection to a “Station”.............................................................................. 43 6.6. Downloading stored data ............................................................................................... 43

6.7. Remote connection via IP Call ....................................................................................... 44 6.8. Data transmission via HTTP/FTP ................................................................................... 45 6.9. Time synchronisation ..................................................................................................... 45

7. Description of the parameters ........................................................................................... 46

8. Technical specifications .................................................................................................... 74

9. Appendix ............................................................................................................................. 75

9.1. Changing parameters via a terminal ............................................................................... 75 9.2. Error messages.............................................................................................................. 75 9.3. Index of tables ............................................................................................................... 77 9.4. Index of figures .............................................................................................................. 77

www.sommer.at page 1

1. Overview of the installation steps The following overview lists the most important steps for a full installation of the MRL-7 data logger. The installation is divided in creating and establishing a connection with the MRL-7 and defining a station. Additionally, the most important settings and measurements to be performed have to be defined.

1. Installation of “Commander” (chapter 6.1)

2. Define a “Connection” for being able to communicate with the MRL-7 (chapter 6.2)

3. Establish a “Connection” with the MRL-7 (chapter 6.3)

4. Define a “Station” for easy data management (chapter 6.4)

5. Set the MRL-7 parameters as required

a. Set the language and decimal character (chapters J-A and J-B)

b. Set the station number and station name assigned to the MRL-7 (chapters A and B)

c. Set the global measurement and storage interval (chapters C and D)

d. Define the number of measurement values to be stored (chapter E)

e. Define measurements to be performed and/or values to be retrieved from connected sensors (chapter G)

f. Configure the modem and data transmission parameters (chapters 6.7, 6.8 and Description of the Parameters chapter I)

g. Adjust the advanced (“Technics”) settings as per your requirements (chapter J)

6. Download stored data (chapters 4.2 and 6.6)

Attention: You must not connect any voltages bigger than 30 volts anywhere to the logger or to any pin. Applying voltages above 30 volts you risk your health, physical damages on the device or even a fire!


2. Logger functions and interfaces

2.1. MRL-7 key functions and features

Fig. 1: MRL-7 key functions and features


Advantages and main characteristics of the MRL-7 data logger

Reliable and energy-saving: optimised to collect monitoring data in remote areas without any infrastructure

Logger can be operated fully independently (with batteries or solar-module), integrated solar charge controller; no equipment cabinet required due to IP 67 rating

Ideal integration and compatibility with complete SOMMER sensor family as well as common sensor technology products

Backlit display for easy data readout and logger parameterisation

Parameterisation via RS-232 and Bluetooth or via IP-call / modem connection

Data readout with USB memory stick, Bluetooth-interface, RS-232 or via IP-call / modem connection

Minimum energy demand

Solid, compact, weatherproof aluminium box

Integrated remote data transmission through modem (2G / 3G and optionally 4G)

2.2. Measurement and data storage concept

2.2.1. Performing measurements

Analogue measurement example

In this example three analogue inputs (An1, An2, An3) are measured. The diagram below shows the first and second measurement intervals.

Fig. 2: Analogue measurement

Every measurement interval starts with the user defined holdback time (see J-I-E). Then An1 is measured three times (see J-I-F and J-I-G) and so are An2 and An3.

After the last measurement is completed, the sensor supply voltage is switched off until the next measurement interval starts again.

RS-485 measurement example

In this example three measurement values are requested from a sensor connected via the RS-485 interface. The diagram below shows the first and second measurement interval.


Fig. 3: RS-485 measurement

At the beginning of every measurement interval the MRL-7 activates the RS-485 interface and issues three trigger commands to the sensor connected. As soon as all requested results are received by the data logger, the RS-485 interface is switched off automatically.

If the requested results are not received within the “Trig, timeout” (see J-G-I) the RS-485 interface is also switched off and the last values received are stored (again).

SDI-12 measurement example

In this example the measurement values are requested from three SDI-12 sensors connected. The diagram below shows the first and second measurement intervals.

Fig. 4: SDI-12 measurement

At the beginning of every measurement interval the MRL-7 issues a M-command to the first sensor which is answered with information about the number of measurement values available and the time until the data is ready to be requested by the data logger. After e.g. one second the MRL-7 issues a D-command to retrieve the measurement results from the sensor.

In this example the SDI-12 sensor addresses are “0”, “1” and “2”.

Table 1: SDI-12 example commands and answers

Example commands and answers

Command issued Answer received Comment

a 0M! 00013<CR><LF> 3 values are available in 1 second

b 0D0! 0+1.1+2.2+3.3><CR><LF> 3 values: “1.1”, “2.2”, “3.3”

c 1M! 10022<CR><LF> 2 values are available in 2 seconds

d 1D0! 1+4.4+5.5<CR><LF> 2 values: “4.4”, “5.5”

e 2M! 20031n<CR><LF> 1 value is available in 3 seconds

f 2D0! 2+6.6<CR><LF> 1 value: “6.6”

For detailed information about SDI-12 please see the official website www.sdi-12.org.

http://www.sdi-12.org/


2.2.2. Storing of measurement results and storage options

Measurement results are recorded in a separate storage interval.

The storage interval must always be equal or bigger than the set measurement interval.

The reason for using a separate storage interval is the advantage of being able to store minimum, maximum and/or mean values of measurement results. These can be set with the software Commander (see chapter G “Measurements, table”, column “Function”) or via the terminal menu (see 9.1).

Fig. 5: Example storage interval

In above example the analogue inputs An1, An2 and An3 are used to measure the outputs of three sensors. Because the storage interval covers two measurement intervals, it is possible to store either the mean value, the minimum or the maximum values measured within the set storage interval. If none of the aforementioned options is chosen, the stored value will be the last available measurement result(s) within the storage interval.

2.2.3. Conditional storage

Some measurement values are only stored when their value has changed since they were last stored. For these measurement values an alternative storage interval can be defined (see J-D-B) and the values can be reset to “0” once per day (see J-D-A).

The sensor types (“S-Typ”) using the conditional storage interval by default are “COUNT” and “SYS” values (see chapter G “Measurements, table” for more information).


2.3. User interfaces

2.3.1. Keyboard and display

The MRL-7 display is being activated by pressing any of the buttons.

The cursor buttons , , and are used to navigate the on-screen menu.

Key Function(s)

Exit the current menu / Abort

Menu item down / Decrease value

Menu item up / Increase value

Enter the currently displayed menu item / Confirm / Trigger measurement

2.3.2. Display menu structure

The following table shows the on-screen menu structure.

It shows an example setup consisting of a temperature and humidity measurement and a snow depth measurement.

Table 2: Display menu structure

Start screen Displays the station number, current date and time.

* Measurements * Main menu item containing all measured values

01 Temperature (e.g. -5.58 °C) *

02 Humidity (e.g. 62.35 %) *

03 Snow depth (e.g. 436 mm) *

*** Stored V *** Main menu item containing all stored values

01 - 03 Temperature, Humidity, Snow depth *

*** Settings *** see chapter 5.6 „Settings“

**** Status **** Status information

1 Station No.

2 SOMMER ID

3 Station name

4 Date

5 Time


6 Software version

7 ** IMSI

8 ** State

9 ** Type (Modem)

10 ** Signal (CSQ)

Values marked with “ * ” are measured / stored values, all others are system values.

Menu items marked with “ ** ” relate to the logger modem.

2.3.3. Parameterisation and data transfer

Several interfaces are available to download stored data and/or to change MRL-7 parameter settings:

Table 3: Interface types and features

Interface type data readout changing parameters

Keyboard and display

USB flash drive (see chapter 4) X

Bluetooth connection (see chapter 6.2.2) X X

Serial interface (see chapter 6.4) X X

IP call (see chapter 6.7) X X

automatic data transmission via HTTP/FTP (see chapter 6.8)

X

Time synchronisation via time server – NTP (see chapter 6.9)

2.4. Sensor connections and sensor power supply

2.4.1. Analogue interfaces

Table 4: Analogue inputs

Analogue input type / range

An 1 0 … 2.5V

An 2 0 … 2.5V


An 3

configurable: - 0 … 2.5V - NTC - resistor > 2kΩ

An 4

configurable: - 0 … 2.5V - 0 … 0.3V - resistor > 1k25Ω - resistor < 1k25Ω - PT1000

Wind – speed frequency measurement

Wind – direction resistor measurement

Counter 1 counts voltage pulses (min. 5V)

Counter 2 counts voltage pulses (min. 5V) up / down

Attention: Counter 2 is no additional input. It replaces wind direction (either/or)!

All analogue sensors can be supplied via the internally provided voltage outputs. See technical data of MRL-7 and sensor used for more details and specific requirements.

Table 5: Supply voltage outputs

Output Maximum load

5V-Out 100mA (max. sum current over all sensors)

12V-Out 200mA (max. sum current over all sensors)

2,5V Reference 4mA

4 x switching outputs 1 x 1,10A

3 x 0,50A

max. total current: 2A

2.4.1. Digital interfaces

SDI-12

SDI-12 sensors can be connected to the MRL-7 via the “SDI12 – D” port. (See chapter 3.5 “Pin description” for the port location.)

When data is requested from several SDI-12 sensors the sequence of requests starts with the first sensor as specified in the “Measurements, table” (see item G).


Example:

Fig. 6: SDI-12 example configuration

Attention: SDI-12 sensors must be supplied either separately or via the MRL-7 12V output (max. 200mA). They must not be operated via switched supply lines. For this reason the parameter setting of the sensor supply (see chapter J-I-B “12V sensor supply”) has to be set to “always on”.

RS-485

Sensors manufactured by SOMMER with an RS-485 interface are connected to the MRL-7 via the port “RS485 A”. (See chapter 3.5 “Pin description” for the port location.)

The RS-485 interface is always ready to receive measurement values when activated (see chapter J-G “RS485-2”). The polling and trigger procedure is explained in chapter 2.2.1.2. “RS-485 measurement example”.

Attention: When more than one sensor is connected to the RS-485 bus, data communication conflicts can occur if multiple sensors send their results to the MRL-7 at the same time.

The prefix option (see chapter J-G “RS485-2”) has to be active when multiple sensors are connected so that recorded data can be assigned to the correct device.


3. Hardware The MRL-7 is available in two different configurations:

- MRL-7: as per standard configuration and without integrated battery

- MRL-7B: with a higher housing to accommodate an integrated battery

Fig. 7: MRL-7

Fig. 8: MRL-7B


Drawings of MRL-7 housing:

Fig. 9: MRL-7 housing, dimensions (in mm)

Fig. 10: MRL-7B housing, dimensions (in mm)


3.1. How to open the housing

Attention: Before the housing is opened, the power supply must be disconnected in order not to risk an electric shock or an electrical short on the hardware.

Remove the covering strips on the left and right side of the housing.

Fig. 11: MRL-7 covering strips

Unscrew the screws using a Philips head no. 2 or a straight head screwdriver.

Fig. 12: MRL-7 screws


Open the housing by flipping the lid open.

Fig. 13: Opening the housing of the MRL-7

3.2. Mounting the MRL-7

After removing the covering strips the MRL-7 can be mounted on a backplane with four screws:

Fig. 14: Holes for Mounting

Compatible screws:

M4 cheese-head screw (included within scope of supply)

M5 hexagon socket head cap screw


3.3. Modem

Data recorded by the MRL-7 can be transmitted to user-defined servers (HTTP and/or FTP) via the integrated modem.

In order to minimize the power consumption the data logger controls the modem supply voltage. Thus, the modem is only switched on when a data transfer has to be performed.

To activate the modem the MRL-7 parameter “Modem functionality” must be set to “on”. For more details and all further modem configurations please see chapter I “Modem”.

3.4. Micro SIM Card, Micro SD Card and Button Cell Battery

The following picture shows the slots respectively the bracket where to find, insert and exchange the micro SIM card, the micro SD card and the button cell of the MRL-7.

To insert and / or switch the micro SIM card, the micro SD card or the button cell, open the MRL-7 housing as described in chapter 3.1 “How to open the housing”.

Attention: Before the housing is opened, the power supply must be disconnected in order not to risk an electric shock or an electrical short on the hardware.

Fig. 15: Lid of the MRL-7 from inside

Micro SD card

Button cell

Micro SIM card


3.4.1. Insert / Exchange of Micro SIM Card

1. To insert / exchange the micro SIM card gently press on the covering with your finger and shift it a little to the side.

2. Then flip the cover open.

3. The micro SIM card can now be inserted, removed or exchanged. Note the correct orientation of the card to be inserted (it will only fit one way).


4. Flip the cover back again and lock it by sliding it back to its old position.

The lock and un-lock position is also marked on the micro SIM card cover itself.

Note that the micro SIM card is not within the scope of supply.

3.4.2. Insert / Exchange of Micro SD Card

1. To insert / exchange the micro SD card gently press on the covering with your finger and shift it a little back.

2. Then flip the cover open.


3. The micro SD card can now be inserted, removed or exchanged. Note the correct orientation of the card to be inserted (it will only fit one way).

4. Flip the cover back again and lock it by sliding it back to its old position.

The lock and un-lock position is also marked on the cover itself. Look closely.

Note that the SD card is not within scope of supply

3.4.3. Exchange of button cell

The MRL-7 is delivered with a button cell built in. This little battery ensures that the time and date function of the logger is not interrupted during the time when the logger lacks any other power supply.


1. To exchange the button cell use a screw driver and gently push the cell out of its holding bracket from behind. To insert a new cell simply push it with your fingers into the holding bracket from the other side.

3.5. Pin description

Fig. 16: MRL-7 pin description


Table 6: MRL-7 pin assignment

Connector Pin(s) Function

Left-hand side connectors:

X1 - Battery connector (-) [internal and/or external battery] 1)

X1 + Battery connector (+), max. 14 V [internal and/or external battery] 1)

X2 - Solar Supply voltage (-) or solar panel connector (-)

X2 NC Not connected / do not use!

X2 dis CR Disabling internal charge regulator

X2 + Solar Supply voltage (+) or solar panel connector (+)

X5 +RS485A RS-485 A

X5 -RS485B RS-485 B

X5 SDI12 SDI-12 sensor connector

X5 GND ground connector

X19 5V-Out 5 V output for sensor supply (max. 100 mA) *)

X19 Counter 2-b Counter 2 secondary input for encoders

X19 Counter 2-a Counter 2 input

X19 GND Ground connector

X10 Counter 1 Counter 1 input


X12 2,5V Ref-Out 2.5 V reference voltage output

X12 Wind-Dir. Wind direction potentiometer input

X12 Wind-Sp. Wind speed input


Right-hand side connectors:

X8 AGND Analog ground connector

X8 AN1 Analog input 1


X8 12V-Out 12 V output for sensor supply (max. 200 mA) **)










X11 CurrL Differential current input (-)

X11 VL Differential voltage input (-)

X11 AN4 / VH Differential voltage input (+)

X11 CurrH Differential current input (+)

X20 12Vbat OUT 12 V power supply (> max. 1 A)



X20 GND ground connector for 12 V power supply

X21 SW1 switching output 1, 12 V



X21 GND ground connector for switching output, 12 V

1) External batteries, if attached here, must always be of the same type as the internally used one, if the internal and the external battery are used/attached together.

*) 100 mA sum current over all sensors

**) 200 mA sum current over all sensors

Attention: You must not connect any voltages bigger than 30 volts anywhere to the logger or to any pin. Applying voltages above 30 volts you risk your health, physical damages on the device or even a fire!


3.6. Spring Clips

The MRL-7 is delivered with an assortment of spring clips for connecting sensors and power supply lines.

1. 4-pin spring clip

2. Use a flat head screw driver to compress the internal spring.

3. Push the screw driver in to lock down the internal spring and open the connection terminal.


4. Insert the wire.

5. Insert the wire completely.

6. Pull out the screw driver to release the spring and fix the wire.


4. USB

4.1. Requirements for flash drive

The used flash drive must be formatted as FAT32.

There must be no file (in the main directory) present from a previous readout of that specific MRL-7 (same Station number).

The file created on the flash drive is named “Stationnumber.csv”.

4.2. Reading out data via USB

The following steps describe the data readout to a connected flash drive:

Remove (unscrew) the cap that protects the USB port.

Plug in a USB flash drive into the USB connector

Fig. 17: MRL-7 USB Connector

Simply press the button until the display shows the message “searching Stick”. The MRL-7 searches for a USB flash drive for six seconds. Plug in a USB flash drive now (or also before) and all data are copied automatically to the USB flash drive since the last readout.

This process may take up to three minutes. During the data download the message “Transfer running” is displayed.

After the data transfer is finished, the message “data copied” is displayed.

The background light of the MRL-7 turns off during the data download to save energy.


To transfer all stored data follow these steps:

o Press and hold the button until “searching for Stick” is displayed.

o Now additionally and promptly press the button , release the button again

and after that also release the button again.

Alternatively, all data can be copied to a connected flash drive via the “Settings” menu. See chapter 5.6 for more information.

Attention: After reading out data to a flash drive, the USB port cap must be screwed on again. When doing so, please take care that the threads of the cap and the USB port are well aligned and the cap can be screwed on easily.

If screwing on the cap does not work smoothly, it maybe is not put on nicely so that the threads do not fit well. Unscrew the cap and carefully try again.


5. MRL-7 keyboard operation

Fig. 18: MRL-7 keyboard

5.1. Description of keyboard buttons, navigating the menu

The cursor buttons , , and are used to navigate the on-screen menu.

The button is used to search for a USB flash drive, to activate/search for a Bluetooth connection or for special functions as described further below.

Key Function(s)

Exit the current (sub)menu / abort

Menu item down / decrease value

Menu item up / increase value

Enter the currently displayed menu item / confirm / trigger measurement

Searching stick / connect Bluetooth/ special functions

When Bluetooth connection is activated, any further manual access to the display menu is denied. The message “BT active no access!” is displayed.


Attention: The button also aborts any activities on the logger, such as active Bluetooth connections, Modem test mode function, data downloads to USB flash drive etc.

5.2. Activating the display

The MRL-7 display is activated by pressing any button for at least one second and shows the main screen (= station number, current date and current time). After four seconds without any activity on the logger, the display switches and shows automatically the first measurement value.

5.3. Deactivating the display

The display will automatically be deactivated / go asleep again in order to minimise the logger’s energy consumption if no further button is pressed after activating the display for at least 10 seconds.

In case any further buttons are pressed after activating the display, the display will automatically be deactivated / go asleep again only after 1 minute.

Alternatively, the display can also be deactivated by pressing and holding the button for at least 2 seconds. The message “Access end hold key!” is displayed. Keep pressing the button and the display will be deactivated shortly thereafter.

5.4. Reading (current) measurement values

Activate the MRL-7 display by pressing any button. After 4 seconds the display will show automatically the first measurement value.

Or, after activating the display, press any button (except the button ) again to show the first measurement value in the list immediately.

To navigate the list use the buttons and .

To manually trigger a measurement of a single measurement value press the button.

5.5. Adjusting measurement values

Enter the measurement value list as described in the chapter before and navigate to the value to be adjusted.

To adjust a single measurement value press and hold the button for at least two seconds. Now input the access code as described below.

To adjust the measurement value use the buttons and .


Press the button to confirm the adjustment, or press to cancel the adjustment.

Access code: To enter the access code press the key sequence 2x followed by 2x

.

Attention: As long as the display is active during the ongoing session, the entered access code unlocks all system settings of the logger.

Press and hold a button to increase or decrease the selected measurement value more quickly (increase/decrease speed doubles every two seconds).

Instantly adjust a measurement value to “0” by pressing the button.

5.6. Settings

Some MRL-7 settings can be adjusted via the display menu.

To adjust the settings activate the MRL-7 display by pressing any button.

Press two times and select the menu “*** Settings ***”. Confirm your selection by pressing

and input the access code as described above.

To change settings or to start a selected special mode navigate to the desired menu item and

press . To cancel inputting a value or abort a special mode press .

Table 7: ***** Settings *****

***** Settings ***** Example Value Description

1 Station No. 20160111 Station number

2 Date 06.04.2017 Current date

3 Time 09:26:28 Current day time

4 Exposure lock off

5 Copy all data

6 Erase all data

7 Continuous M turn on Continuous Measurement

8 Adjust Contrast weak Adjusts the display contrast

9 Reboot Device Reboots the MRL-7 without the need to switch the supply voltage.

10 Modem Testmode Only available, if a modem is configured at all

4 Exposure lock


When activated reading measurement values via the MRL-7 display is only possible after inputting the access code. Also copying stored data to a connected flash drive or via a Bluetooth connection requires the user to input the access code. (see also chapter J-C-E “Exposure lock”).

This applies to all measurement values except for special observer inputs.

5 Copy all data

When selected all stored data are copied to a connected USB flash drive.

6 Erase all data

Attention: When selected, all data stored on the MRL-7 are deleted!

7 Continuous Measurement

Activates a special continuous measurement mode. Measurements are performed in the shortest possible interval. This option is intended for testing setups.

The continuous measurement mode is deactivated automatically after three minutes.

8 Adjust Contrast

“Adjusts” the display contrast. There are four different levels available: base, weak, high and medium.

9 Reboot Device

Reboots the MRL-7 without the need to switch the supply voltage. This option is helpful for performing firmware updates, which require the device to be restarted.

10 Modem Testmode

A number of automatic tests are performed and related information is displayed:

The modem is initialized.

The SIM card IMSI number is displayed for a short amount of time.

To freeze the display press and hold the button.

The signal strength is tested and displayed.

The defined connections are established:

o The MRL-7 synchronizes its time with the defined time server.

o Data are sent to all defined servers.

o The MRL-7 IP call function is activated.


6. Parameterisation

6.1. Commander

The MRL-7 is parameterized with the software Commander or via the terminal menu (see chapter 9.1).

To edit the parameters with the PC software Commander, the “Expert” mode must be active (for more details see Commander manual):

Fig. 19: Setting the “Expert” mode in the software “Commander”

The PC software Commander highlights the edited parameters. After uploading the changes to the MRL-7, the modified parameters are active (for more details see Commander manual).

The installation software of the Commander is delivered on a USB flash drive together with the MRL-7.

6.2. Defining a local connection with the MRL-7

The connection between the MRL-7 and a computer is established via the USB/RS-232 converter (not within scope of supply) or via Bluetooth.


6.2.1. RS-232

Fig. 20: USB/RS-232 converter

Fig. 21: Connecting the USB/RS-232 converter

Plugin the USB connector at any USB port of your computer and use the software Commander to define a connection. Then set the parameters as required using the “Communication assistant” as described hereafter.

Install and start the software Commander.

Launch the “Communication assistant” and follow the given instructions.

Use the buttons “Next” and “Back” to adjust the different settings from one step to another or press “Cancel” to abort the communication assistant.

Select “Serial connection” when using the communication cable.


Make sure the MRL-7 is supplied with power (either internal batteries and/or external power supply), and the communication cable is plugged into the data logger on one end and the other end is connected to a USB port of the laptop running “Commander”.

Select “Logger (115200 Bd)”

Select the COM port that was assigned to the connection cable from the drop down list.

If more than one COM port is listed and you are unsure which to select, disconnect the connection cable and repeat the search. The COM ports listed now are not assigned to the connection cable. Plug in the converter and repeat the search once more. Now an additional COM port will be listed. This is the one assigned to the connection cable.

The communication assistant dynamically changes between 7 and 10 steps, depending on whether an existing


connection can be selected or if a new connection has to be established (additional steps to define specific port and/or station information).

Assign a name to the connection for later use.

An automatic search for connected devices is performed. This step can take up to two minutes.


If a station already exists, it will be recognised and automatically selected.

It can be decided whether or not to assign the found device(s) to the “Station”.

If no station is found, a “Name” for the station can be defined.

Select “Yes” to proceed.

The station created in the step before is selected automatically and is ready to be used.

Alternatively and without using the “Communication assistant”, the communication parameters can also be set manually within the tab “Connections”. There are different possibilities to display the tab “Connections”:

by pressing “F8” on your keyboard

by selecting “Connections (F8)” in the main menu item “Tabs” (for temporary display only)

by selecting “Show connections tab” that can be found in the main menu item “Options”, submenu item “Tabs” (for permanent display).


For further information on how to define connections, please see the Commander manual.

6.2.2. Bluetooth

Either an internal Bluetooth module or a USB Bluetooth dongle has to be available on the computer used.

Use the software “Commander” to define a Bluetooth connection as described hereafter.

Before a Bluetooth connection can be established the MRL-7 Bluetooth transceiver must

be switched on. Press and hold the button until the message “hold for BT” is

displayed. Keep holding the button until the message „waiting for BT no access“ is displayed. Now a Bluetooth connection can be established with the MRL-7.

The MRL-7 Bluetooth ID is printed on a sticker on the MRL-7 housing.


Install and start the software “Commander”.

Launch the “Communication assistant”.

Use the buttons “Next” and “Back” to adjust the different settings from one step to another or press “Cancel” to abort the communication assistant.

Select “Bluetooth” for type of connection and follow the instructions of the assistant.

The first time a Bluetooth connection is established with Commander a “New connection” needs to be selected.

The communication assistant dynamically changes between 8 and 9 steps, depending on whether an existing connection can be selected or if a new connection has to be established (additional steps to define specific port and/or station information).


This step might take a few seconds.


This step might take a few seconds.

If no matching station exists, a “Name” for the station can be defined.

If a station already exists, it will be recognised and automatically selected.

Select “Yes” to proceed.


The station created in the step before is selected automatically and is ready to be used.

Alternatively and without using the “Communication assistant”, the communication parameters can also be set manually within the tab “Connections”. There are different possibilities to display the tab “Connections”:

by pressing “F8” on your keyboard

by selecting “Connections (F8)” in the main menu item “Tabs” (for temporary display only)

by selecting “Show connections tab” that can be found in the main menu item “Options”, submenu item “Tabs” (for permanent display).


For further information on how to define connections, please see the Commander manual.

6.3. Commander: Establishing a connection

To establish a connection to an MRL-7 either a “Connection” or “Station” (6.4 “Defining a station”) can be selected. When a station is selected one of the assigned connections must be chosen.

The parameterisation of the MRL-7 is performed with the software Commander. To establish a connection with the device follow the steps described in the previous chapter.

To download the MRL-7 parameters switch to the “Parameters (F2)” tab and click “Download parameters”.

When downloading the parameters for the first time, the process will take approximately 2 minutes. When the process is repeated, the download is completed in a shorter amount of time.

Fig. 22: Download Parameters


After the download has been completed a list of all parameters is displayed.

All parameters are described in chapter 7 “Description of the parameters”.

Fig. 23: List of parameters

6.4. Defining a station

To download stored data, to comfortably manage several MRL-7 devices and to enable additional functions (e.g. IP call), it is advised to create a “station” in Commander.

To create a station select the “Stations (F7)” tab and click “New Station”.

Fig. 24: New Station


Input the Station ID and SOMMER ID set in the MRL-7.

When delivered both IDs are identical with the device’s serial number. The MRL-7 serial number (S/N) is printed on the device housing.

Fig. 25: Station no. and SOMMER ID


Select which previously defined “Connections” (Serial, Bluetooth, IP Call, …) to assign to the “Station”.

The default “Connection” for this station can be set by checking the circle next to the connection type.

Fig. 27: Assigning connections to a station


Depending on the connection types assigned to the station additional information must be inputted.

Please see chapter 6.2.2 “Bluetooth” and chapter 6.7 “Remote connection via IP Call” for further details.

Fig. 28: Connection details

When data are downloaded from a connected MRL-7 they are saved in an “archive” file by default. Every archive file contains all data from a year or month, depending on the chosen “Archive Type”. When set to “None” all data recorded by the MRL-7 will be saved in one file.

The default location of downloaded data files is “C:\Users\Public\Documents\Sommer\Data\”

Fig. 29: Data archive

To finish the session press “Save station”.

Fig. 30: Saving a station


6.5. Establish a connection to a “Station”

To connect to a station select the mode “Station” in the window “Communication”. Choose the station name and select a connection via which the MRL-7 is reachable.

The settings are applied immediately.

Click “Connect” now. After the connection is established successfully it is now possible to download parameters from the MRL-7, to read out measurement data or to establish a terminal connection.

Fig. 31: Connecting to a station

6.6. Downloading stored data

To download data from an MRL-7 select the “Data (F4)” tab in Commander. Choose the “Station” and select a connection via which the MRL-7 is reachable.

Now click the button “Transfer data” to download all stored data of the station selected from the data logger.

Fig. 32: Downloading stored data


Click “Download data manually” to download data stored since a manually chosen date and time. Use the slider to select the timeframe.

Fig. 33: Downloading stored data manually

6.7. Remote connection via IP Call

To establish a connection to an MRL-7 via an IP call, the MRL-7 has to be assigned to a station which is set up for IP call connection.

To establish a remote connection, the SIM card’s IMSI number has be entered in the station settings.

The IMSI number of an integrated SIM card can be retrieved:

reading out the device status via the tab “Parameters (F2)”, “K Special Functions” (see chapter K-A “Device status”)

using the “Modem Testmode” feature (see chapter 5.6 “Settings”)

or reading the menue 4 “Status” (item 7 “IMSI”) via the logger display itself.

Fig. 34: IMSI number


Click “Save station” to store the settings.


To establish the connection select “Station” as “Mode”, choose the station you want to connect to and then select the “IP Call” connection.

The settings are applied immediately.

Now either parameters can be downloaded from the MRL-7 or a terminal connection established by clicking “Connect”.

Fig. 36: IP call connection

6.8. Data transmission via HTTP/FTP

When data are transferred to a server via HTTP or FTP protocol (see chapter I-C “Data transmission 1”), all data stored on the logger will be sent to the defined server(s).

The first transmission includes all data recorded so far. Further transmissions will include all data recorded since the last successful transmission.

In case the data could not be transferred (e.g. because of bad cell reception) the “missing” data will be sent on with the next successful transmission.

6.9. Time synchronisation

The MRL-7 can synchronise its internal clock with a time-server (NTP-Server).

The time synchronisation settings are described in chapters I-F “NTP synchronisation time” through I-I “NTP timezone”.


7. Description of the parameters The MRL-7 settings are opened and adjusted with the SOMMER PC software "Commander".

Alternatively, all settings can be accessed and modified via a terminal program (see chapter 9.1 “Changing parameters via a terminal”).

The PC software “Commander” highlights the edited parameters. After uploading the changes to the MRL-7, the modified parameters are active.

The installation software of the Commander is delivered on a USB flash drive together with the MRL-7.

For further details, please refer to the user manual for the PC software “Commander”.

Main menu

A Station ID

B Station name

C Measurement interval

D Storage interval

E Measurements, max. number

F Aux measurements, max. number

G Measurements, table

H Messages, table

I Modem

J Technics

K Special functions

The parameters are arranged in a main menu with submenus. The menu items are opened and closed by double-clicking them.

A Station ID

The station ID is set to the MRL-7 serial number by default but can be adjusted by users.

B Station name

User defined name of the station (max. 32 characters).

C Measurement interval

With this setting, the measurement interval can be defined.

Value range 00:00:02…12:00:00 00:01:00 (default)

Value range 0 ... 99999999 00000000 (default)


The measurement interval defines at which times measurements are performed.

D Storage interval

With this setting, the storage interval can be defined.

Value range 00:00:10…12:00:00 00:01:00 (default)

The storage interval defines at which times the measured values are saved.

E Measurements, max. number

Up to 99 measurement values can be defined for the MRL-7.

Depending on the ordered components, SOMMER preconfigures some measurements. However, the end user can define additional measurements. The configuration steps are described in chapter G – see further below.

Value range 1…99 4 (default)

The maximum of 99 measurement values refers to the measurement values as set in chapter “E” and “F” (measurements and auxiliary measurements) in total.

F Aux measurements, max. number

Auxiliary measurement values. Up to 99 auxiliary measurement values can be defined for the MRL-7.

Same as the ordinary measurement values the auxiliary measurement values are displayed in the measurement table (chapter G) however numbered starting from 99 downwards.

Auxiliary measurement values are set in order to be able to check additional/multiple limit values.

In addition, an auxiliary measurement value allows defining an existing measurement value with an altered setting (e.g. different unit, decimals, scale etc.).

The maximum of 99 measurement values refers to the measurement values as set in chapter “E” and “F” in total.

Auxiliary measurement values are not stored and transmitted in the measurement data file. They can only be read via the “Measurements, table” (chapter G) in the Commander or the terminal window.

G Measurements, table

Column title Description

1 … 99 Unique number assigned to a measurement value. This number specifies the position of the measurement value in the MRL-7 output string (RS-232 and/or SDI-12). The same number is also assigned to the measurement value when saved values are downloaded from the data logger.

Value range 1 … 99 1 (default)


Function The function defines which measurement values are saved: - off: No measurement is performed and no values are saved. - actual: The last measurement result within the active storage

interval is saved. - meanval: The mean value of all measurements within the last

storage interval is saved. - minimum: The lowest measured value within the last storage

interval is saved. - maximum: The highest measured value within the last storage

interval is saved. - sum: The sum of all measurement results within the last storage

interval is saved. - intens.: The intensity (e.g. of the rainfall) is saved (only if the

counter input is used). - diff.: The difference of the last stored value to the latest

measurement result is saved. - custom1: currently not defined - custom2: currently not defined

Identifier User defined name of the measurement value.

Unit User defined unit of the measurement value.

Decimals Defines the number of decimal places assigned to the measurement value.

- 1 … 5: 1 to 5 decimal places can be defined for the measurement value.

- none: No decimals are defined for the measurement value

- as S: The source value’s decimal place is assumed for the MRL-7.

Scale User defined factor with which the retrieved measurement value is multiplied. Attention: This option is only available when the “Decimals” are not set to “as S”.

Offset User defined offset that is applied to the retrieved measurement value.

Adjustment By clicking this button, a measurement is performed and the result is outputted. In case the outputted value is incorrect, the value can be adjusted by inputting the correct value. This adjustment only affects the “Offset” but not the “Scale”.

Test A measurement of the selected measurement value is performed and the result is outputted.

S-Typ Sensor type (source)

- AIN: analogue inputs AN1: analogue input 1 AN2: analogue input 2 AN3 (N): analogue input 3 AN4 (D): analogue differential input

- WIND: preconfigured for wind sensor speed: wind speed direct.: wind direction

- COUNT: counter input (registers and counts voltage pulses at the counter input). Counter 1 Counter 2a Counter 2ab: quadrature encoder

- SDI12: a measurement value is retrieved from a connected SDI-12 slave device.


The sensor address is set via the “S-NUM” and the measurement value position is defined via the “S-MEA” (see details for the table “S-MEA” further down).

- SBP: A measurement value is retrieved from a connected SOMMER sensor that supports the SBP protocol (via RS-485 connected to BUS 2/AB). The sensor address is set via the “S-NUM” and the measurement value position is defined via the “S-MEA” (see the following lines for more information).

- MIO: A measurement value is retrieved from a connected SOMMER sensor that supports the MIO protocol. The sensor address is set via the “S-NUM” and the measurement value position is defined via the “S-MEA” (see the following lines for more information).

- SYS: A set of internally measured values is available to be retrieved and stored: key A: Counts the times the MRL-7 is manually activated via its keyboard. key S: Counts the times the MRL-7 is manually activated via its keyboard with a special key sequence. manual: Observer input: Any time a manual adjustment of this value is performed the newly set value is stored unless it has not changed. exep. A: Analysis value for SOMMER exep. B: Analysis value for SOMMER light: Ambient light measurement result +Sup V: Supply voltage measurement +Bat V: Internal battery voltage 5V sup: Internal 5V bus measurement mo CSQ: Modem signal strength mo excep.: Modem exception messages mo srv1: Modem server 1 mo srv2: Modem server 2 mo srv3: Modem server 3 Switch: Current output switch status Message: Number of successful message transmissions since the last storage event.

The message number defined as per chapter “H Messages, table” must be inputted in the field “S-NUM”.

- RECYC: “Recycled” channel value The source value is defined via the “S-NUM” which corresponds with a (previously) defined measurement value. Example: Measurement value no. “03” is set to measure analogue input 1 (AIN1) and to store the “raw” value. A RECYC-measurement value is defined as measurement value no. “12”. The relating “S-NUM” is set to “03” to retrieve the measured “raw”


value. Additionally the number of decimal places is set to “2” to enable the option to set a “Scale” of “0.5”. The stored value of measurement value no. “12” will now always be half the measured value “03” (AIN1).

S-NUM The sensor number assigned to the desired measurement source: Examples:

- SDI-12 sensor address “3” - RS-485 sensor address “2”

S-MEA The position in the input string of the measurement value to be retrieved and stored. Example: SDI-12 sensor output values= 0.0 + 1.1 + 2.2 + 3.3 + … value position = “1” “2” “3” “4” … To retrieve the value 1.1 the S-MEA has to be set to “2”.

S-ADD Additional commands to be issued along a standard request for data to a source. The different commands are related to according sensor types (“S-TYP”) as set.

- “_Cn”: SDI-12 C-command - “CCn”: SDI-12 C-command with CRC - “_Mn”: SDI-12 M-command - “MCn”: SDI-12 M-command with CRC - _Rm”: SDI-12 R-command - “RCm”: SDI-12 R-command with CRC

n … SDI-12 measurement cycle number m … SDI-12 measurement output line number - SW: “swap A/B” for S-TYP quadrature encoder - NR: “no reset” for function “sum” - DD: for sum channels - SY: "sync" for async channels to store as

synchron - AS: "async" for sync channels to store asynchron - ST: "smaller than" for limits that fall below - GS: "grenzwert status" to store the limit value

status of a specific channel - TD: "trigger data" polling of data without triggering

the measurement - TF: "trigger fake" something for S-TYP “MIO” add-

on - SC: "subchannel" for S-TYP “SBP”

Example: The desired data is outputted when an “M2” command is issued to the connected sensor. To ascertain the data is transmitted correctly a CRC checksum is also requested. S-ADD = “MC2”

Limit User defined limit value that can be entered. The value format is the same as for the measurement value itself. By default the measurement value has to exceed the limit trigger condition. If the value shall be deceeded, the additional command “ST” (smaller than) must be set.

Messages If a message for a specific measurement and its limit value is defined (see chapter H “Measurements, table”), a box for the according message number appears. Here the box of the message, that shall be triggered once the limit value status is reached, must be ticked off.


H Messages, table

The MRL-7 features a configurable messaging system. Messages are transmitted to the defined recipients whenever the “Limit” as set for a measurement value is exceeded or deceeded (according to the message configuration).

Column title Description

1 … 16 Unique number assigned to a message. A maximum of 16 independent messages can be set.

message The message defines which kind of message is used: - off: No message is sent - Switch: A switching output is switched when the trigger condition is

fulfilled. - E-mail: An E-Mail is sent to the defined recipient when the trigger

condition is fulfilled. - text: A SMS text message is sent to the defined recipient when the

trigger condition is fulfilled.

Recipient User defined recipient - Switch: setting not applicable / not available - E-Mail: E-Mail address of the recipient - text: Phone number of the recipient

Dialling codes can start with either “00” or “+” Example: A text message (SMS) shall be sent to a recipient in Germany while the modem is installed in France. The dialling code for Germany is either “0049” or “+49” followed by the (national) phone number.

Subject Subject for e-mail messages. (“Subject” is not applicable / not available for Switch and text.)

To be defined by user, max. 80 characters available. Facultative, message content codes can be used. See the following “Content Codes” table for detailed description.

Content Defines the content of the message.

To be defined by user, max. 160 characters available. Facultative, message content codes can be used. See the following “Content Codes” table for detailed description.

switch Defines which switching output is used (check boxes) – applicable only with “Switch”.

Hold Defines the timeframe in seconds during which the switching output is switched as soon as the trigger condition is fulfilled. Example: Switching output number 2 shall be activated for 30 seconds after the trigger condition is fulfilled: Setting “switch” = “02” (via check box) Setting “Hold” = “30”

Content Codes

The message content can be configured according to end user’s requirements.


To insert standard message content more easily a number of inline content codes are available.

Code Description

%sid% Station ID assigned to the MRL-7

%sname% Station name assigned to the MRL-7

%cname% Name of the channel that triggered the message

%cunit% Unit assigned to the channel that triggered the message

%time% Time of the message transmission

%date% Date of the message transmission

%cval% Latest channel measurement result at the time of the message transmission

%tval% Set limit value that was exceeded/deceeded

%rval” Measurement result that triggered the message output

%wnum% Message number as defined per MRL-7 setup (01 … 16)

%cp% Measurement result of a user defined channel. Example: Channel number “02” triggers an E-Mail message. This message shall contain the channel name and value of the measurement result that triggered the message and additionally the current result of channel number “14”. “Content” = %cname% %rval% Ch.14 m.value = %cp14%

I Modem

Modem Unit

A Modem functionality off

B Modem config

C Data transmission 1

D Data transmission 2

E Data transmission 3

F NTP synchronisation time 02:08:43

G NTP server

H NTP port 123

I NTP timezone 3600 sec

J Background function off

K Standby, start time 08:00:00

L Standby, duration 01:00:00

M IP Call server mds.sommer.at

N IP Call port 4647

O IP Call interval 00:01:00

P E-mail/SMTP


I-A Modem functionality

Setting Description

on The modem function is activated.

off (default) The modem function is deactivated.

I-B Modem config

I-B-A SIM pin

Setting Description

-1 (default) Configures the SIM card PIN. When set to “-1” no PIN is required for the SIM card.

It is not possible to change the SIM card’s PIN with the MRL-7. Such changes have to be performed with a different device (e.g. mobile phone).

Attention: If the SIM pin is set incorrectly, the SIM card will be locked after three consecutively failing attempts to transfer data.

I-B-B Net type

To allow CSD calls the setting has to be “2G”.

I-B-C Foreign operator mcc&mnc

Setting Description

“blank” (default) If the field is blank, the setting is deactivated.

Enter the mcc&mnc code for your home network in case your provider is a virtual one only. Make sure to enter the correct code!

I-B-D Operator select

Setting Description

auto (default) The network operator is selected automatically.

home Only the SIM card’s home network is used.

Prefer home Preferably the set home network operator is chosen by default. If no connection can be established with the home network, a search for all available operators is performed and a different operator is selected automatically.

Setting Description

auto (default) The network type is selected automatically.

3G Only 3G networks are used to transfer data.

2G Only 2G networks are used to transfer data.


I-B-E APN address

Setting Description

“blank” (default) Configures the APN server address

The APN settings in menu items I-B-E, I-B-F and I-B-G can be set either manually or the settings are chosen from a predefined list with the software Commander. The list opens by clicking on “Select APN” in the menu “Special commands” on the left bottom side of the window.

Fig. 37: APN list

I-B-F APN user name

Setting Description

“blank” (default) Configures the APN user name

I-B-G APN password

Setting Description

“blank” (default) Configures the APN password

I-B-H Custom command 1

Setting Description

“blank” (default) Configures special commands to be sent to the modem (AT). This feature should be used by modem experts only. All issued AT commands must be answered with “ok” by the connected modem.

I-B-I Custom command 2

Setting Description

“blank” (default) Configures special commands to be sent to the modem (AT). This feature should be used by modem experts only. All issued AT commands must be answered with “ok” by the connected modem.


I-C Data transmission 1

The measured and recorded data / camera pictures can be transmitted to up to three separate servers. The data can either be transferred via HTTP or FTP protocol.

I-C-A Target server type

Setting Description

off (default) No data transferred

http The data is sent to a HTTP server (HTTP settings are used)

ftp The data is sent to a FTP server (FTP settings are used)

I-C-B Data transmission interval

Unit hh:mm:ss hh:mm:ss

Value range 00:01:00 … 23:59:59 00:10:00 (default)

I-C-C Data transmission offset

The data transmission offset is used to prevent several MRL-7 from sending their data to a server at the same time by setting different transmission offsets for every data logger. When the transmission offset is set to “00:00:00” the data will always be transmitted at “full” minutes (when the transmission interval is also set to “full” minutes, e.g. “00:05:00”).



I-C-D Content

I-C-E FTP server name

I-C-F FTP username

Setting Description

“blank” (default) Defines the user name for the FTP server account.

I-C-G FTP password

Setting Description

“blank” (default) Defines the password for the FTP server account.

Setting Description

data (default) To be set for data transmission

camera To be set for camera pictures transmission

Setting Description

“blank” (default) Defines the FTP server address / name to which the data are sent. Host names or IP addresses can be used.


I-C-H FTP directory

Setting Description

“blank” (default) Defines the FTP subdirectory where the data is saved. When this setting is left empty, the data are saved in the FTP root directory.

I-C-I FTP port

Setting Description

“21” (default) Defines the FTP server port.

I-C-J FTP mode

Setting Description

“active” or “passive” (default)

Defines the FTP server mode (active or passive).

I-C-K HTTP server name

In case a host name is used the network provider has to provide a DNS as standard.

I-C-L HTTP path

Setting Description

“blank” (default) Defines the HTTP request/URL/script via which the data are saved.

I-C-M HTTP port

Setting Description

“80” (default) Defines the HTTP server port.

I-C-N HTTP cam chan

The parameter “cam chan” is only applicable for HTTP servers.

To change this setting, the data transmission content (see chapter I-C-D) must be set to “camera”.

The parameter “cam chan” is independent from the numbers of the measurement values as in chapter G “Measurements, table”. Data (measurements) and camera images are handled completely separately by the MRL-7.

Setting Description

“blank” (default) Defines the HTTP server address / name to which the data are sent. Host names or IP addresses can be used.

Setting Description

“1” (default) Camera channel – it defines the HTTP camera channel for the images of a camera attached to the logger, which are sent to the SOMMER MDS server (measured data server). The “cham chan” number has to match the image channel in the SOMMER MDS.


I-D Data transmission 2

See chapter I-C “Data transmission 1” for details.

The only difference is the default value for “Data transmission offset”.

I-E Data transmission 3

See chapter I-C “Data transmission 1” for details.

The only difference is the default value for “Data transmission offset”.

I-F NTP synchronisation time

Defines the time at which the internal clock is synchronised with the timeserver time.



I-G NTP server

Setting Description

“blank” (default) Address of the NTP server (timeserver).

I-H NTP port

Setting Description

“123” (default) Port of the NTP server (timeserver).

I-I NTP timezone

With this setting the local time zone can be defined via an offset related to the UTC time.

Unit Seconds (sec.) Seconds (sec.)

Value range -43200 … 43200 3600 (default)

I-J Background function

Setting Description

off The MRL-7 is not set to accept remote connections

time window The MRL-7 is set to accept CSD calls (if 2G) in the set time frame (see chapter I-K and chapter I-L).

time wi. + IP call (default)

The MRL-7 is set to accept CSD calls (if 2G) in the set time frame and checks periodically for IP call requests.


Setting Description

Time wi. + socket The MRL-7 is set to accept CSD calls (if 2G) in the set time frame and listens on its IP address with port 4646 – direct connection via internet.

I-K Standby, start time

The standby launch time defines the daytime when the MRL-7 starts to be available for remote communications (CSD calls, IP calls).



I-L Standby, duration

The standby duration time defines how long the MRL-7 is available for remote communications (CSD calls, IP calls) and socket.



I-M IP Call server

Setting Description

“mds.sommer.at” (default)

IP call server address / name.

I-N IP Call port

Setting Description

“4647” (default) The port via which the IP call server is reachable.

I-O IP Call interval

Defines the interval within the set standby time frame (see chapter I-K and chapter I-L), when the MRL-7 shall check if there are any IP call requests to the logger.

I-P E-Mail/SMTP

Settings of the MRL-7 to send out e-mails to be configured by the user according to its individual e-mail server details.




I-P-A E-Mail/SMTP

I-P-B sender

Setting Description

“blank” (default) E-mail address of the MRL-7 as the sender (e.g. [email protected])

I-P-C username

Setting Description

“blank” (default) User name to access e-mail server account (if applicable/requested by individual server settings)

I-P-D password

I-P-E Port

J Technics

Technics Unit

A Language/Sprache english/englisch

B Decimal character dot

C Additional settings

D Additional timings

E Com 1 protocol

F com 1

G RS485-2

H SDI-12 bus mastering

I ANALOG setup

J Camera

J-A Language/Sprache

Setting Description

“german/deutsch” Select to set the device menu language to German.

Setting Description

“blank” (default) Name / address of the e-mail server used by the MRL-7 to send out e-mails (e.g. mail.samplename.at).

Setting Description

“blank” (default) Password to access e-mail server account (if applicable/requested by individual server settings)

Setting Description

“25” (default) Port number of e-mail server port


Setting Description

“english/englisch” (default)

Select to set the device menu language to English.

J-B Decimal character

Setting Description

“comma” Select to set the “,” as decimal character.

“dot” (default) Select to set the “.” as decimal character.

J-C Additional settings

J-C-A Sommer ID

The SOMMER ID is used to define stations with the software “Commander”. For more information, please see the Commander manual.

By default the SOMMER ID is set to the device’s serial number.

SOMMER suggests not to change the SOMMER ID except if a damaged MRL-7 device is replaced by a new MRL-7. In such a case it can be reasonable to change the SOMMER ID of the replacement device to the SOMMER ID of the original logger in order to guarantee a trouble-free archiving.

Setting Description

“serial number” SOMMER ID

J-C-B Block size, data load

The block size defines how much data is transferred with one communication block (only applicable when transferring data via the serial interface).

Unit Byte Byte


J-C-C Internal low volt. disconnect

The batteries of the MRL-7 are protected from deep discharge. In case the battery voltage drops below the set limit, the MRL-7 is switched off automatically.

The set limit depends on the used batteries. See the battery data sheet for more information.

Attention An incorrect value in this parameter field can seriously affect the device operation!

Unit V V

Value range 5.0 … 11.0 9.5 (default)

J-C-D SommerXF starts with BOM

The BOM (Byte Order Mark) is a special character outputted when the MRL-7 storage is read out.


Setting Description

“on” (default) BOM is outputted.

“off” BOM is not outputted.

J-C-E Exposure lock

With this setting the option to display measured values on the MRL-7 device display can be switched on and off.

Access code: To enter the access code, press the key sequence 2x followed by 2x

.

Attention: As long as the display is active during the ongoing session, the entered access code unlocks all system settings of the logger.

J-C-F LCD, Contrast

With this setting the display contrast can be set.

Setting Description

“weak” (default) Lowest contrast setting

“base” Base contrast setting

“medium” Medium contrast setting

“high” Highest contrast setting

J-C-G LCD, Brightness

The MRL-7 has an integrated ambient light sensor that is used to automatically adjust the display brightness.

When the measured ambient light is less than specified in this setting the display backlight brightness is automatically adjusted (three different levels) to a suitable level. When the measured ambient light exceeds the setting value, the display backlight is switched off completely.

Unit lm lm


J-C-H Windspeed measurement duration

This value defines the period of time to measure the wind speed.

Setting Description

“off” (default) Measured values are displayed.

“display” Measured values are displayed only after access code is entered.

“display + data” Measured values are displayed only after access code is entered. Additionally, downloading data to a connected flash drive requires entering the access code.

Unit ms ms



J-D Additional timings

J-D-A Sum, reset time

Defines the time at which accumulated sums are reset to “0”.

Attention: This applies to all measurement values using the “Sum” function.



J-D-B Occasional storage interval

Defines the storage interval of “special” measurement values.

This applies to all “SYS” measurement values.



J-D-C Sync date (last)

Every time the device date is updated manually (via Commander) the current date is automatically saved for the purpose of documentation.

Unit YYYY-MM-DD YYYY-MM-DD

Value range 2000-01-01 … 2199-12-12 production date (default)

J-D-D Sync time (last)

Every time the device time is updated manually (via Commander) the current time is automatically saved for the purpose of documentation.


Value range 00:00:00 … 23:59:59 production time (default)

J-D-E min. Hold On message

The period of time set in this menu defines how long a measurement value’s trigger condition for the message has to be unfulfilled (the limit value has to be exceeded/deceeded) before the trigger condition status ends again.

Example: “min. Hold On message” setting = 5 the trigger condition has to be exceeded/deceeded for five consecutive minutes

Unit Minutes (min.) Minutes (min.)


J-D-F max. Hold On message

By using this option, the MRL-7 can be configured to send multiple messages in a user defined interval as long as a measurement value’s trigger condition is fulfilled still.

Example: “max. Hold On message” setting = 120 a further message is sent after 120 minutes from the beginning of the trigger condition.


Setting “0” minutes equals to deactivate this function.

J-E Com 1 protocol

This submenu defines the protocol settings for the RS-232 interface of the MRL-7.

Com 1 protocol Unit

A Device number 0

B System key 0

C Output protocol (OP) type SOMMER

D Output (MO) time just per command

E MO wake-up sequence prefix

F MO prefix holdback 300 ms

J-E-A Device number

Device number assigned to the MRL-7 in the RS-232 bus.


J-E-B System key

System key assigned to the MRL-7 in the RS-232 bus.


J-E-C Output protocol (OP) type

Two different measurement output protocols are available for the RS-232 port.

Setting Description

SOMMER (default)

SOMMER Bus Protocol

standard Standard protocol

J-E-D Output (MO) time

By default, the measurement results are outputted via the RS-232 interface and are available to be retrieved via SDI-12 commands after a measurement was completed. However, it is possible to configure the MRL-7 to output the results only when a command is issued or when a measurement result is saved.

Setting Description

just per command (default)

Measurement results are only outputted when requested with commands (RS-232 or SDI-12).

measured automatic

Measurement results are outputted automatically after a measurement was completed.

Unit Minutes (min.) Minutes (min.)



Setting Description

storage automatic Measurement results are outputted after a measurement result was saved by the MRL-7.

J-E-E MO wake-up sequences

In case a connected device records the MRL-7 output strings it might be required for this device to receive a sync, prefix or both before the measured values can be recorded.

Setting Description

off No wake-up sequence is used.

sync A sync is issued prior to the output string.

prefix (default) A prefix is issued prior to the output string.

prefix & sync A prefix and sync are issued prior to the output string.

J-E-F MO prefix holdback

J-F Com 1

This submenu defines the connection settings for the RS-232 interface.

Com 1 protocol Unit

A Baudrate 115200

B Minimum response time 10 ms

C Flow control RTS-CTS

J-F-A Baudrate

Baud rate for the RS-232 interface.


J-F-B Minimum response time

Unit ms ms


J-F-C Flow control

Unit ms ms


Setting Description

off No flow control is activated

XON-XOFF XON-XOFF blocking is active

RTS-CTS (default) RTS-CTS is active


J-G RS485-2

This submenu defines the connection settings for the RS-485 interface.

RS-485-2 Unit

A Baudrate 9600

B Parity, stop bits no par., 1 stop

C Minimum response time 0 ms

D Transmitter warm-up time 10 ms

E Flow control XOFF-XON blocking

F Sending window 300 ms

G Receiving window 300 ms

H Trig, polling on

I Trig, timeout 70 sec

J Trig, sleep while timeout on

K Network scan extension on

L Transparency to RS485-2

Attention: The settings of the MRL-7 must correspond with the settings of the connected sensor(s) to guarantee smooth operation.

J-G-A Baudrate

Unit Bd Bd


J-G-B Parity, stop bits

Setting Description

no par, 1 stop (default)

no par., 2 stop

even par, 1 stop

odd par, 1 stop

J-G-C Minimum response time

Unit ms ms


J-G-D Transmitter warm-up time

Unit ms ms



J-G-E Flow control

Setting Description

Off Flow control is deactivated.

XOFF-XON blocking (default)

Flow control is activated.

J-G-F Sending window

Defines the time span during which commands are sent via the RS485-2 interface.

Unit ms ms


J-G-G Receiving window

Defines the time span during which commands are received via the RS485-2 interface.

Unit ms ms


J-G-H Trig, polling

Setting Description

off Continuous polling of measurement values – mode is deactivated.

on (default) Continuous polling of measurement values – mode is activated.

J-G-I Trig, timeout

Defines the time, the MRL-7 is waiting until expected commands/answers are received via the RS485-2 interface.

Unit sec sec


J-G-J Trig, sleep while timeout

To save on power consumption the MRL-7 can switch off the RS-485 interface until a measurement result is available. If set to “on” the connected sensor (e.g. RQ-30) must send a “Sync” command to reactivate the RS-485 interface so that it can record the output string sent by the sensor.

Setting Description

off

on (default)

J-G-K Network scan extension

When activated the network scan extension enables detecting connected SOMMER sensors (e.g. RQ-30) with Commander. The parameters of detected SOMMER devices can be parameterised with Commander.

Setting Description

off Detecting SOMMER devices connected via RS485-2 is deactivated.


Setting Description

on (default) Detecting SOMMER devices connected via RS485-2 is activated.

J-G-L Transparency to RS485-2

This menu item is available only via the terminal menu (see 9.1 Changing parameters via a terminal).

When this menu item is selected commands and responses can be sent and received directly via the RS485-2 interface of the MRL-7.

This feature can be useful to adjust the device settings of a connected RS-485 sensor.

J-H SDI-12 bus mastering

SDI-12 bus mastering Unit

A Max. measurement duration 20 sec

B Sensor search

C Change sensor address

D Ask for a sensor address

J-H-A Max. measurement duration

Defines the maximum time available for requesting and receiving data from SDI-12 sensors. If no answer is received within this period of time, the logger stores an “empty” value instead of the measured value.

Unit sec. sec.


J-H-B Sensor search

This menu item is available via the terminal menu only. Please see chapter 9.1 for more information.

When selected a search for all available SDI-12 sensors connected to the bus is performed and the result is outputted (SDI-12 command “?!”)

J-H-C Change sensor address


When selected the address of a sensor in the SDI-12 bus can be changed (SDI-12 command “aAb!”).

J-H-D Ask for a sensor address


J-I ANALOG setup

ANALOG setup Unit


A 5V sensor supply off

B 12V sensor supply off

C Extended supply off

D Switch usage off

E Warm-up time 0 sec

F ADC - conv. rate 62 Hz

G ADC filter off

H AN3 (N) type voltage 2.5

I AN4 (D) type voltage 2.5

J-I-A 5V sensor supply

With this setting the supply voltage provided at the analogue inputs can be set.

Setting Description

“off” (default) No sensor supply voltage is outputted.

“switched” The sensor supply voltage is set to 5V and is outputted during measurements only (max. 100mA).

“always on” The sensor supply voltage is set to 5V and is outputted at all times (max. 100mA).

J-I-B 12V sensor supply

With this setting the supply voltage provided at the analogue inputs can be set.

Setting Description

“off” (default) No sensor supply voltage is outputted.

“switched” The sensor supply voltage is set to 12V and is outputted during measurements only (max. 200mA).

“always on” The sensor supply voltage is set to 12V and is outputted at all times (max. 200mA).

J-I-C Extended supply

With this setting the extended supply voltage/current can be set.

This voltage/current is outputted when an analogue measurement is performed. The set warm-up time (see J-I-E) applies.

Setting Description

“off” (default)

“2.5V” 2.5V are outputted via the “2.5V Ref Out” pin (see 3.5 Pin description)

“0.5mA” 0.5mA are outputted via the “CurrH” pin (see 3.5 Pin description)

“2.5V + 0.5mA” Both aforementioned reference values are outputted


J-I-D Switch usage

With this setting connecting the sensor supply voltage of the MRL-7 through via the switches (SW1, SW 2 and SW3) can be de/activated (see also chapter 3.5).

Setting Description

“off” (default) The sensor supply voltage is not connected through via the “Switch Out” pin.

“1” The sensor supply voltage is outputted via the SW1 (switch 1 pin) during active measurements.



J-I-E Warm-up time

The “Warm-up time” is the period of time required to receive valid measurement results from connected sensors.

Unit sec. sec.


Example: A sensor connected to one of the analogue inputs needs to be powered on for 10s until correct measurement values are outputted. The analogue sensor’s power is supplied via the 12V sensor supply line from the MRL-7.

The “Warm-up time” is therefore set to (minimum) 10s.

J-I-F ADC – conv. rate

Defines the sampling rate of the analogue inputs.

Unit Hz Hz


J-I-G ADC filter

By default the ADC filter is set to “off” so one measurements per analogue input is performed and outputted.

When set to any of the three remaining options three measurements of all analogue inputs are performed in sequence. Depending on the ADC filter setting, the results are filtered and a single value is outputted/stored.

When any of these options is selected please consider that getting measurement results will take longer. The measurement interval/frequency is defined via the “ADC – conv. rate” (see chapter J-I-F).

Setting Description

“off” (default) One measurement is performed and no filter is applied.

“minimum of 3” Three measurements of the analogue inputs are performed and the lowest measurement result is outputted.

“medium of 3” Three measurements of the analogue inputs are performed and the medium value of those measurement results is outputted.


Setting Description

“mean of 3” Three measurements of the analogue inputs are performed and the mean value of those measurement results is outputted.

J-I-H An3 (N) type

Analogue input AN3 can be configured to measure resistors greater than 2000 ohm or a connected NTC (resistor with Negative Temperature Coefficient).

Setting Description

“voltage 2.5” (default)

Standard analogue input: Measures voltages of 0V … 2.5V.

“NTC” An NTC is measured and the resistance is outputted.

“R meas > 2k” A resistor greater than 2000 ohm is measured and the resistance is outputted.

J-I-I An4 (D) type

Analogue input 4 can be used for a set of predefined applications which are selected with this setting.

Setting Description

“voltage 2.5” (default)

Standard analogue input: Measures voltages of 0V … 2.5V.

“voltage 0.3” High-resolution voltage measurement for up to 0.3V.

“R meas > 1k2”” A resistor with more than 1200 ohm is measured and the resistance is outputted.

“R meas < 1k2” A resistor with less than 1200 ohm is measured and the resistance is outputted.

“PT1000” Preconfigured for connecting a PT1000 temperature sensor.

J-J Camera

A camera (web cam) is connected via the RS-485 interface. This chapter describes the available camera parameter settings.

Camera Unit

A switch off

B Warm-up time 30 sec

C Night recognition on

D View

J-J-A switch

Setting Description

“off” (default) To be set, if the camera does not need a power supply by the MRL-7.

“1” Camera is connected to switching output 1.



Setting Description


J-J-B Warm-up time

The time, before the camera is able to take a picture.

Unit sec sec


The warm up time can only be set if the camera is supplied to a switching output.

J-J-C Night recognition

To safe battery, the MRL-7 can control the camera to prevent it from taking pictures in the darkness (e.g. during the night).

Setting Description

“off” Function is deactivated. The camera can always take pictures.

“on” (default) Function is active. The camera does not take pictures during the night.

Only applicable if the MRL-7 is power supplied by solar panel.

J-J-D View

If this button is pressed, the camera is activated and an image (in JPG file format) is displayed in the Commander. (In the terminal mode the image is shown as binary data code.) The image is also stored automatically at the default location of downloaded data files (C:\Users\Public\Documents\Sommer\Data\).

K Special functions

The special functions are either available by pressing the provided button (e.g. item A, B, H and I) or via the terminal menu.

See chapter 9.1 “Changing parameters via a terminal” for more information.

Special functions

A Device status

B View setup

C Continuous measurement mode (tempo.)

D Inspection, nominal values

E Inspection, start process

F Set factory default

G Temp. load factory default

H Relaunch program

I Replace program


K-A Device status

Outputs the current device status.

Example of device status output:

Device status

Device: MRL-7

Software version: 1_19r00

Miu-OS version 4_06r00

Setup version 2_06r04

Serial number 00000000

System advice codes: 0x0000 0x0000 0x0000 0x0000

Date (YYYY,MM,DD) 2017-04-03

Time 10:33:47

Modem, IMSI Nr.: 232018831215087

Modem, signal qual.: 32,0 2G

IP address:

K-B View setup

Selecting this menu item causes a list of all device settings to be outputted. The list can be recorded with Commander. For more information, please see the Commander manual.

K-C Continuous measurement mode (tempo.)

This special measurement mode was implemented to recognize changes in measurement values easier and more quickly when testing a setup at a measurement site. The continuous measurement can also be activated via the MRL-7 keyboard (see chapter 5.6 for more information).

Selecting this menu item activates a continuous measurement mode. When enabled measurements are performed continuously in the shortest possible interval. In addition, the sensor supply voltages are always outputted and saving asynchronous measurement values (e.g. observer input etc.) is disabled.

The continuous measurement mode is disabled automatically after 3 minutes.

K-D Inspection, nominal values

List of internal MRL-7 nominal values that are used for an automatic testing during the production process of the logger.

K-E Inspection, start process

Starts an automatic testing of the internally generated voltages and of the analogue inputs.


To be able to perform this testing a specific testing-adapter has to be connected to the MRL-7. This testing-adapter can be purchased from SOMMER Messtechnik at extra costs.

K-F Set factory default

Menu item to set all MRL-7 device parameters to their default values (requires user confirmation).

K-G Temp. load factory default

Menu item to temporarily set all MRL-7 device parameters to their default values. When the MRL-7 is restarted or the terminal menu exited and then reopened the previously set parameters are restored.

This feature is meant to be used as a reference of all default values in case no other documentation (e.g. this manual) is available at a measurement site.

K-H Relaunch program

With this menu item the MRL-7 firmware can be restarted. The boot process is the same as if the device’s supply was removed and reconnected.

K-I Replace program

With this menu item the MRL-7 firmware can be restarted. The boot process is customized to better support performing remote firmware upgrades (boot loader time extended).


8. Technical specifications Technical data are subject to change

Table 8: Technical specifications

Inputs 4 x analogue inputs 0...2,5 V (one differential input)

2 x Counter inputs

1 x Wind speed

1 x Wind direction (same as counter 2)

1 x RS-485 (SOMMER-Bus protocol)

1 x SDI-12 (MRL-7 as master)

1 x Observer input

Outputs 1 x RS-232: 1200...115200 Baud (ASCII protocol)

1 x USB

1 x Bluetooth

Modem 2G / 3G (optionally 4G)

Total of 3 FTP / HTTP servers

Data retrieval and parametrisation

Functions: IP call, fixed IP, time-synchronisation

Power supply Internal battery (MRL-7B only): 12 V / 4 Ah

Deep discharge protection for internal batteries

Supply voltage: 6 to 30 VDC

Reverse voltage protection

Overvoltage protection

Solar panel supply: max. 40 W / 12 V

Energy consumption * Standby: < 0.6 mA

Normal: < 23.0 mA

Area of application Operating temperature: -30 °C to +60 °C

Storage temperature: -40°C to +60°C

Storage Humidity: 10 to 90 % rH

Housing Material: Anodized aluminium

Dimensions (W x H x D):

MRL-7: 180 x 150 x 60 mm

MRL-7B: 180 x 150 x 90 mm

Installation: four mounting holes

Protection type IP 67

* … Energy consumption measured with a supply voltage of 12 VDC. Sensors supplied via the MRL-7 can increase power consumption.


9. Appendix

9.1. Changing parameters via a terminal

The main menu is opened by entering three question marks ??? in the terminal program.

The terminal menu is available via all connection types (serial connection, IP call, Bluetooth …).

Attention: Do not enter a “carriage return” after inputting ???.

Fig. 38: Main menu in terminal mode

The menu items are accessed by entering the menu key displayed left of the menu item. Either submenus are opened or the specific parameter is displayed with its corresponding unit. Changes are verified with Enter, editing is aborted with Esc. Sub menus are closed with X.

The menu is not case sensitive. When the main menu is closed, the sensor starts the measurement mode and returns the message “Init done!”.

9.2. Error messages

PLEASE NOTE: Parameterconflict (view manual)!

This message is outputted when

…for example the parameter “Switch usage” in the menu “ANALOG setup” (see chapter J-I-D) and the parameter “switch” in the menu “Camera” (see chapter J-J-A) are set to the same switch number (e.g. “1”).

When the above configuration example is identified, the parameter changed last will be set as defined by the user and the conflicting parameter is automatically set to “off”.


Reason: It is not possible to use the same switch number for two different parameters (purposes).

Switches can be selected (parameterised) at the different menu chapters “H Messages, table(when selected message type “switch”), “J-I-D Switch usage” for the analogue setup and “J-J-A switch” as of the camera settings.

…the set “Measurement interval” (see chapter C) is shorter than the set “Trig, timeout” (see chapter J-G-I) and/or the “Max. measurement duration” (see chapter J-H-A) and/or the “Warm-up time” (see chapter J-I-E).

The measurement interval is automatically adjusted to the smallest possible value taking into account the other aforementioned parameters.

Reason: The setting of (the shortest possible) measurement and/or (!) storage interval is defined by the measuring process of all sensors connected (via analogue, RS-485 and SDI-12 interfaces) and their measurement duration needed to perform a measurement. Therefor the measurement (and/or storage) interval can never be shorter than the aforementioned intervals of one or multiple sensors (see also chapter “2.2 Measurement and data storage concept”).

Example: The supply voltage of a connected analogue sensor must be switched on 60 seconds before a correct measurement result is outputted. The warm-up time is therefore set to 60 seconds. The MRL-7 measurement interval was previously set to 20 seconds.

When the (changed) parameters are transferred (uploaded / synchronised) to the MRL-7, the error message is outputted and the measurement interval is automatically set to 60 seconds.

DIRECTIVE: Please don't forget to change serial counterpart too!

This message is outputted when the baud rate set via parameter J-F-A Baudrate is changed.

Please note the new setting and adjust the previously defined “Connection” (see 6.2.1 Defining a local connection with the MRL-7) accordingly or create a new “Connection”.

PLEASE NOTE: Maybe difficult interpretation of archive data!

This message is outputted when the „Identifier“ (see chapter G Measurements, table) and/or the unit of more than one defined measurement is changed.

The reason for outputting this message is that because of such changes the ordering of measurement values can change. This makes interpreting the archived data more difficult. There are three options available to the user when this message is outputted:

Accepting the warning because the changes made have desired effects only (e.g. correcting the “Identifier” of a measurement value).

Creating a new station (or changing the current station number) to make sure that the changes made have no negative impact on previously created archives.

If this option is chosen SOMMER suggests deleting all data stored on the MRL-7 to prevent previously archived data from being added to a new (and additional) archive.

Deleting the „old“ archived data (or shifting it to a new file storage location) locally on the used computer and also erasing all data stored on the MRL-7 to reset the device to a “new” station.

PLEASE NOTE: An old archive pointer has been replaced!


This message is outputted only when more than 16 different computers were used to archive data collected with the currently connected MRL-7. In almost all cases this message can be ignored.

To keep the archive system “clean” SOMMER suggests appointing someone who is mainly responsible for the station(s). This person can synchronize all previously used archives and then delete all archive pointers (in Commander select “Extra”/”Data”/”Delete all data pointers).

Mistake: Please just enter valid values!

This message is outputted when characters are entered (e.g. in terminal mode) that are not allowed / not applicable for the actual parameter or setting (e.g. a letter is entered although only numbers are possible).

Mistake: Please, just enter menu choice characters!

This message is outputted when characters are entered (e.g. in terminal mode) that are not part of the contained menu choice of characters (e.g. the number “3” is entered although only the numbers “1” and “2” are able to be entered as part of the menu choice).

9.3. Index of tables

Table 1: SDI-12 example commands and answers ..................................................................... 4

Table 2: Display menu structure ................................................................................................. 6

Table 3: Interface types and features ......................................................................................... 7

Table 4: Analogue inputs ............................................................................................................ 7

Table 5: Supply voltage outputs ................................................................................................. 8

Table 6: MRL-7 pin assignment ................................................................................................ 19

Table 7: ***** Settings ***** ....................................................................................................... 27

Table 8: Technical specifications .............................................................................................. 74

9.4. Index of figures

Fig. 1: MRL-7 key functions and features ................................................................................... 2

Fig. 2: Analogue measurement ................................................................................................... 3

Fig. 3: RS-485 measurement...................................................................................................... 4

Fig. 4: SDI-12 measurement ...................................................................................................... 4

Fig. 5: Example storage interval ................................................................................................. 5

Fig. 6: SDI-12 example configuration .......................................................................................... 9

Fig. 7: MRL-7 ........................................................................................................................... 10

Fig. 8: MRL-7B ......................................................................................................................... 10

Fig. 9: MRL-7 housing, dimensions (in mm) ............................................................................. 11

Fig. 10: MRL-7B housing, dimensions (in mm) ......................................................................... 11

Fig. 11: MRL-7 covering strips .................................................................................................. 12


Fig. 12: MRL-7 screws ............................................................................................................. 12

Fig. 13: Opening the housing of the MRL-7 .............................................................................. 13

Fig. 14: Holes for Mounting ...................................................................................................... 13

Fig. 15: Lid of the MRL-7 from inside ....................................................................................... 14

Fig. 16: MRL-7 pin description ................................................................................................. 18

Fig. 17: MRL-7 USB Connector ................................................................................................ 23

Fig. 18: MRL-7 keyboard .......................................................................................................... 25

Fig. 19: Setting the “Expert” mode in the software “Commander” ............................................. 29

Fig. 20: USB/RS-232 converter ................................................................................................ 30

Fig. 21: Connecting the USB/RS-232 converter ....................................................................... 30

Fig. 22: Download Parameters ................................................................................................. 39

Fig. 23: List of parameters ....................................................................................................... 40

Fig. 24: New Station ................................................................................................................. 40

Fig. 25: Station no. and SOMMER ID ....................................................................................... 41


Fig. 27: Assigning connections to a station .............................................................................. 41

Fig. 28: Connection details ....................................................................................................... 42

Fig. 29: Data archive ................................................................................................................ 42

Fig. 30: Saving a station........................................................................................................... 42

Fig. 31: Connecting to a station ................................................................................................ 43

Fig. 32: Downloading stored data ............................................................................................. 43

Fig. 33: Downloading stored data manually.............................................................................. 44

Fig. 34: IMSI number ............................................................................................................... 44


Fig. 36: IP call connection ........................................................................................................ 45

Fig. 37: APN list ....................................................................................................................... 54

Fig. 38: Main menu in terminal mode ....................................................................................... 75

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