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Digital Proximity System

Operation and Maintenance Manual

100576 • REV C

The DPS (Digital Proximity System) devices consists of two modules: the MX2033 and MX2034. The MX2033 is a conventional 3-wire driver while the MX2034 is a two-wire current loop transmitter. Users can con-figure either unit to measure peak-to-peak vibration, gap distance, or rotational speed. These products are used in conjunction with a proximity probe and extension cable to measure the vibration levels, gap distances, or rotational speed of machinery shafts. Us-ers can configure the units via a USB cable and configuration software.

Doc# 100576 • REV C (Sept 2017) Page 2 of 42

TABLE OF CONTENTS

1. General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31.1 Safety Terms and Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31.2 General Safety Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42.1 MX2033 Three-Wire Proximity Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52.2 MX2034 Two-Wire Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52.3 For more information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53. Configuring a DPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63.1 Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63.2 Software Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73.3 Connecting the DPS to a Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113.3.1 Remove the Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113.3.2 Apply Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123.4 Launching the DPS Configuration Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123.5 Main Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133.5.1 Command Line Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133.5.2 Device Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133.5.3 Device Communication Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .143.5.4 Configurable Device Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .143.5.5 Confirming the Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .163.5.6 Printing a Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .163.5.7 Installing the Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .183.6 Using the MX2034 Buffered Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .184. Verification and Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .194.1 Scale Factor Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .204.2 Scale Factor Custom Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .244.2.1 Current Loop Verification (MX2034 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .265. Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .295.1 MX2033 and MX2034 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .295.2 MX2034 Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .306. Performance Graphs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .316.1 Driver/Transmitter Temperature Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .316.1.1 MX2030/BN 3300 5 Meter System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .316.1.2 MX2030/BN 3300 9 Meter System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .346.1.3 Metrix/BN 7200 5 Meter System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .366.1.4 Metrix/BN 7200 9 Meter System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .396.2 Phase Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .427. Trademarks and Copyrights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43


HIGH VOLTAGE PRESENT

PROTECTIVE EARTH NOTE

DANGER or CAUTION

FUNCTIONAL GROUND

1. GENERAL INFORMATION

1.1 SAFETY TERMS AND SYMBOLS

Terms that appear in this manual requiring special attention include:

• WARNING: Warning statements identify conditions or practices that could result in injury or loss of life.

• CAUTION: Caution statements identify conditions or practices that could result in dam-age to the product, loss or corruption of data, or damage to the environment or other property.

• NOTE: Notes identify material of special interest or importance to the user, not including cautions or warnings.

Symbols that may appear on the product and/or in this manual include:

1.2 GENERAL SAFETY SUMMARY

Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it.

• USE ONLY AS SPECIFIED To avoid potential hazards, use this product only as specified. Only qualified personnel should perform installation and uninstallation procedures.

• OBSERVE ALL TERMINAL RATINGS To avoid fire or shock hazard, observe all ratings and markings on the product. Consult the individual sections of this manual for further ratings information before making con-nections to the product.

• AVOID EXPOSURE TO CIRCUITRY Do not touch exposed electrical connections and components when power is present.

• DO NOT OPERATE WITH SUSPECT FAILURES If you suspect there is damage to this product, have it inspected by qualified personnel.


1.3 RECEIVING, INSPECTING AND HANDLING THE SYSTEM

Metrix ships the probe, extension cable, and driver as separate units that the user intercon-nects at the installation site. Carefully remove all equipment from the shipping containers and inspect it for shipping damage. If you see shipping damage, file a claim with the carrier and submit a copy to Metrix Instrument Co. Include part numbers and serial numbers on all correspondence. If no damage is apparent and the equipment is not going to be used imme-diately, return the equipment to the shipping containers and reseal until ready for use. Store the equipment in an environment that is free from potentially damaging conditions such as extreme temperature, excessive humidity, or a corrosive atmosphere.

2. OVERVIEW

The Metrix Digital Proximity System module comes in two versions:

• MX2033 – 3-wire proximity driver

• MX2034 – 2-wire, loop powered proximity transmitter

A complete DPS system requires a DPS module, a proximity probe, and an extension cable. You can configure the MX2033 and MX2034 modules to operate with the probe and cable combinations shown in Table 1.

Table 1: Probe Configurations

Manufacturer Probe Series System Length

Metrix MX2030 5 mm or 8mm tip 5m

Metrix MX2030 5 mm or 8 mm tip 9 m

Metrix 7200 5 mm or 8 mm tip 5 m

Metrix 7200 5 mm or 8 mm tip 9 m

Bently Nevada 3300 or 3300 XL 5 mm or 8 mm tip

5 m

Bently Nevada 3300 or 3300 XL 5 mm or 8 mm tip

9 m

Bently Nevada 7200 5 mm or 8 mm tip 5 m

Bently Nevada 7200 5 mm or 8 mm tip 9 m

Standard target material is AISI 4140. Other materials available upon request.


The sections below provide more module information.

2.1 MX2033 THREE-WIRE PROXIMITY DRIVER

The MX2033 signal output is proportional to the distance between the probe tip and the target material. The signal output follows API Standard 670 and is compatible with most continuous vibration monitoring systems. The MX2033 uses -24Vdc excitation and provides an output scale factor of 7.87 mV/mm (200mV/mil) for 5 mm and 8mm probes.

2.2 MX2034 TWO-WIRE TRANSMITTER

The MX2034 provides an ISA standard 4-20 mA signal proportional to vibration, axial posi-tion shaft speed (RPM) for direct connection to a PLC, DCS, SCADA system, or other instru-mentation without requiring a separate monitor system. The MX2034 is powered by +24 Vdc, supplied within the current loop. The MX2034 is user configurable to function as either a radial vibration transmitter (where the 4-20 mA signal is proportional to peak-peak vibra-tion amplitude), as an axial position transmitter (where the 4-20 mA signal is proportional to average probe gap) or as a speed (RPM) transmitter (where the 4-20 mA signal is propor-tional to the speed of a machine). For convenience when connecting to signal analyzers, portable data collectors, and test instrumentation, the raw vibration signal is available at a short-circuit protected BNC connector. Refer to section 3.6 of this manual for important information and cautions regarding proper use of this connector.

2.3 FOR MORE INFORMATION

Refer to these documents for more information:

1087015 MX2030 Digital Proximity Transducer System Datasheet

1232961 DPS Hazardous Area Installation Manual

100528 DPS Label Kit Manual


3. CONFIGURING A DPS

• This section lists the procedure for configuring a DPS:

• Installing the DPS Configuration Software

• Connecting a DPS to your computer

• Retrieving the configurations from the DPS

• Changing the DPS configuration for probe/cable type

• Changing the DPS configuration for measurement type (MX2034 only)

• Changing the DPS full scale range (MX2034 only)

• Printing DPS labels

3.1 EQUIPMENT REQUIRED

You will need the equipment listed below to configure a DPS.

Item Notes

Computer With Windows XP, or Windows 7 or Windows 10, Operating System

24V Power Supply

Positive or Negative. Refer to datasheet 1087015 for power supply voltage tolerance and DPS current requirements.

USB Cable USB 2.0 A to mini B

Labels Avery 6570

Label Overlay Included with the DPS


3.2 SOFTWARE INSTALLATION

Metrix provides the DPS Configuration and Utility Software on a USB memory stick that you request with the DPS (Refer to the DPS datasheet for software ordering information.)

Insert the USB stick into your computer and open explorer to view the files.

Double-click the version for your operation system according to Table 2 and follow the instructions listed on the following pages.

Table 2: Operating System vs. Version

Operating System Version

Windows XP DPSUser.exe (32 bit)

Windows 7 DPSUser_x64.exe (64 bit)

Click Next to continue

Figure 1: Software Installation Splash Screen


Figure 2 shows the end user license agreement. Click ‘Accept” to continue

Figure 2: License Agreement

Figure 3: Installation Screen

Click Install to begin the installation


If you are running Windows 7, Windows may present a User Account Control notice as shown in Figure 4. Click “Yes” to continue.

Figure 4: Windows 7 User Account Control

You may additionally see a Windows Security notice as shown in Figure 5. Click ”Install this driver software anyway” to continue.

Figure 5: Windows 7 Security Control


Click the Finish button as shown in Figure 6 to close the installation process.

Figure 6: Installation Complete Screen


3.3 CONNECTING THE DPS TO A COMPUTER

Follow these steps to access the DPS USB connector for connection to a computer.

3.3.1 REMOVE THE BASE

Remove the three screws from the DPS base to access the mini USB connector as shown in Figure 7 and Figure 8.

Figure 7: Removing the Base

Figure 8: The USB Plug

Plug the USB A connector into an available USB port on your computer.

Remove these three screws to remove the base

Plug the mini-USB connector into the DPS Plug


3.3.2 APPLY POWER

You must apply 24 Vdc power to the DPS while configuring as shown in Figure 9. Note that you can use either a negative or positive power supply (Refer to the DPS datasheet for volt-age and current requirements.) Powering is the same for either the MX2033 or the MX2034. The MX2034 does not require load resistors when configuring.

Figure 9: Powering the DPS

3.4 LAUNCHING THE DPS CONFIGURATION SOFTWARE

Launch the DPS Configuration Software by double-clicking the icon:

NOTE: Install the software before connecting and pow-ering the DPS to ensure the computer finds the correct USB driver

Common-24V Common

+24V


3.5 MAIN SCREEN

The DPS Configuration Software opens with the main screen shown in Figure 10.

Figure 10: The Main Screen

3.5.1 COMMAND LINE OPTIONS

File – Exit the DPS Configuration Software.

Print Labels – This opens the label printing screen to print updated side labels for their unit. This label contains basic configuration information as well as user specific information such as machine location, etc.

Help - Provide descriptions of the various features of the software.

3.5.2 DEVICE INFORMATION

The DPS software automatically retrieves the DPS configuration when launched with a pow-ered up DPS unit connected via a USB cable. If you connect a DPS unit after launching the software, press the Retrieve button to retrieve the configuration.

The device information shows:

Data Last Retrieved: The date and time the displayed configuration was retrieved.

Model: DPS part number with full configuration (all dash options).


Description: Digital Proximity Driver (MX2033) or Digital Proximity Transmitter (MX2034)

Serial Number: Device serial number

Date of Manufacture: Date the device was manufactured.

Firmware Version: Firmware model and revision number

Hardware Version: Hardware major.minor revision number

Factory Calibration Date: Date of the last time Metrix calibrated the device

Last Configuration Change: Date the configuration was last changed.

3.5.3 DEVICE COMMUNICATION STATUS

Table 3: Device Communication Status

3.5.4 CONFIGURABLE DEVICE SETTINGS

You can configure a DPS module for:

• Probe Series• Probe Diameter• System Length• Target Material• Measurement (MX2034 only)• Range (MX2034 only)• 4-20mA Direction (MX2034 only)

Status Description

DPS is connected and communicating properly

DPS is not connected or not communicating


Figure 11: Configuring by Parameters

3.5.4.1 PROBE SERIES

All DPS units support Metrix MX2030, Metrix 10,000 series 7200 compatible, Bently Nevada 3300, and Bently Nevada 7200 series probes. The DPS also supports one additional probe type specified at the time of ordering.

3.5.4.2 PROBE DIAMETER

The DPS supports 5mm, 8mm and 11mm probe tip diameters as part of its standard factory-loaded curve set.

3.5.4.3 TARGET MATERIAL

DPS units support the standard four probe series listed in section 3.5.4.1 calibrated for 4140 steel. The additional probe type specified at the time of ordering may be calibrated to a variety of materials. Contact Metrix for information on special material calibrations.

3.5.4.4 MEASUREMENT

The Measurement field is only active for the MX2034 transmitter model. The MX2034 sup-ports three measurements: Radial Vibration, Axial Position, and Shaft Speed (RPM).

3.5.4.4.1 RADIAL VIBRATION

The MX2034 performs a peak to peak detection and drives the 4-20 mA output proportional to the configured range.

1) Select the new configuration parameters from the drop down list

2) Click the Send button to send the new configuration to the DPS


3.5.4.4.2 AXIAL POSITION

The MX2034 performs a displacement measurement for axial position and driver the 4-20 mA output proportional to the configured range.

3.5.4.4.3 SHAFT SPEED (RPM) MEASUREMENT

The MX2034 performs a pulse count measurement cause by keyway and drives the 4-20 mA output proportional to RPM.

3.5.4.5 RANGE

The Range choices are different for Radial Vibration, Axial Position, and Shaft Speed (RPM) measurements.

3.5.4.6 4-20mA DIRECTION

The MX2034 allows configuration of upscale or downscale for the 4-20mA output of axial position measurements only. Upscale means that for the range selected in 3.5.4.5, 4mA corresponds to bottom of scale and 20mA corresponds to top of scale; downscale reverses these conventions and means that 20mA corresponds to bottom of scale and 4mA corre-sponds to top of scale.

3.5.5 CONFIRMING THE CONFIGURATION

After clicking the Send button, you will have the option to abort the configuration change. Press the Yes button to continue.

3.5.6 PRINTING A LABEL

After sending a configuration change, the software will give you the option to print a label.

You can also print a label later from the main screen by clicking Print Labels and then One Label.

Figure 12: Printing one label


Clicking the Print Label button next to the label information opens up the Print Label Screen. Use this screen to fill in additional information you want to record with the DPS.

Figure 13: Print Label Screen

After filling in any custom information, click the OK button. The label print start screen opens. The label print start screen allows you to select the label position you want the label printing to start at. This template is set for Avery 6570 label sheets of 32 labels (or equiva-lent).

NOTE: User-printed labels should be secured under plastic overlay window. Order Metrix p/n 100527 DPS Label Printing Kit which contains instructions, Avery Labels, and overlays needed for printing up to 16 labels.


Figure 14: Selecting the label print start position

Clicking a label starting point will open the printer selection screen. Select the printer and click OK to print.

Figure 15: Selecting the printer

3.5.7 INSTALLING THE LABEL

Remove the backing from the polycarbonate label and adhere the printed label inside the clear window. Attach both labels to the side of the DPS unit. Refer to DPS Label Kit manual 100528 for additional details.

3.6 USING THE MX2034 BUFFERED OUTPUT

Due to the two wire, loop-powered MX2034 transmitter design, the current loop common floats on top of the voltage developed across the current loop sense resistor.


The buffered output common is protected against ground loop currents affecting the current loop output with a 10kΩ resistance between the buffered output common and the loop common.

Metrix recommends using a ground isolated instrument or signal isolator. The meter, oscil-loscope or analyzer used to measure the gap voltage or to observe the vibration signal (DYNAMIC OUTPUT) must have an input impedance of one megohm or greater.

The scale factor of the output signal is 200 mV/ mil.

Metrix recommends a maximum cable length of 15 ft (5 m) when connecting to the buffered output due to noise susceptibility caused by the high input and output impedances.

4. VERIFICATION AND CALIBRATION

This section describes the steps to verify proper DPS operation and to custom calibrate your DPS to your specific probe and cable.

CAUTION: When using the MX2034 BNC connector, exer-cise special care to prevent ground loops that could alter the 4-20mA output, resulting in spurious alarms or ma-chine trips. Such ground loops can occur when connecting to grounded test equipment or multiple input test equip-ment. Metrix recommends use only with ungrounded test equipment, such as battery-powered portable meters, or grounded test equipment with differential inputs (i.e., neither side of input connection is tied to ground). Also, cable lengths between the BNC connector and test equip-ment should be kept suitably short (5m or less) to prevent unwanted noise.

NOTE: The DPS requires the probe and extension cables be from the configured probe series, combine to the config-ured system length, and view the configured target mate-rial in order to meet system range and accuracy


4.1 SCALE FACTOR VERIFICATIONFollow these steps in this section to verify the voltage output scale factor. The basic proce-dure is: Obtain the correct target material Assemble the test instruments and equipment Electrically zero the probe Measure the output voltage in fixed gap increments

4.1.1.1 OBTAINING THE TARGET

Use a 1.2 inch or larger target with 5 mm or 8 mm probes. Be sure your target material matches the material the DPS calibration material. To verify the calibration material, follow the steps listed in Figure 16.

Figure 16: Verifying the Target Material Configuration

CAUTION: Do not connect test equipment or cables to the driver unless the area has been determined to be non-hazardous

1) Retrieve the DPS configuration

2) Verify the Target Material configuration


4.1.1.2 ASSEMBLE THE TEST INSTRUMENTS AND EQUIPMENT

Verification requires these instruments and equipment

• Spindle micrometer• Digital Multimeter• Power Supply (-24 Vdc +/- 1Vdc)• 10 kohm resistor

Figure 17: MX2033 Scale Factor Validation Set Up

NOTE: Use the BNC connector on the MX2034 to verify the scale factor. The terminal strip signal pin is not used on the MX2034.


Figure 18: MX2034 Scale Factor Validation Set Up

4.1.1.3 ELECTRICALLY ZERO THE PROBE

Set the probe gap “electrically” to the start of the measurement range by observing the DC output voltage and adjusting the probe position until the output is -1 V +/- 0.1 V at 10 mils gap.

Figure 19: Setting Electrical Zero

Set micrometer for 10 mils

Move probe until meter reads -1.0V


4.1.1.4 MEASURE THE VOLTAGE IN GAP INCREMENTS

Increase the micrometer 10 mil (0.25 mm) increments and fill in the measured SIG Voltage in the table below.

Table 4: Verification Data Table

mils mm SIG Voltage

10 0.25

20 0.50

30 0.75

40 1.00

50 1.25

60 1.50

70 1.75

80 2.00

90 2.25 To calculate the Average Scale Factor (ASF), subtract the voltage measured at 10 mils (0.25 mm) from the voltage at 90 mils (2.25 mm)and divide by the full scale range of 80 mils (2 mm)

Example:

Voltage at 90 mils (2.25 mm) is -17.1 V


ASF = (-0.98) - (-17.1)/80 = 201.5 mV/mil Or ASF = (-0.98) - (-17.1)/2 = 8.06 mV/mm

To calculate the Incremental Scale Factor (ISF) at each gap, subtract the SIG voltage mea-sured 10 mils (0.25 mm) below each increment and divide by 10 mils (0.25 mm).

Example:



ISF = (-9.02) - (-7.1)/10 = -192 mV/mil Or ISF = (-9.02) - (-7.1)/0.25 = -7.68 mV/mm


4.2 SCALE FACTOR CUSTOM CALIBRATION

You can easily custom calibrate the DPS for your probe following the procedure in this sec-tion. Perform the Scale Factor Verification as described in section 4.1.

Open the DPS software and click the button.

The custom calibration window opens.

Enter the voltages measured at each gap from the Scale Factor Verification data.

When complete, click the Generate and Load Linearization button. The software will adjust the DPS linearization to match the probe and cable.

NOTE: The custom calibration process overwrites any previous custom calibration. Standard Metrix factory calibrations for MX2030 and 7200 5m and 9m systems are not affected.

NOTE: Voltages are assumed negative. Do not put a “-” sign in front of each voltage.


Figure 20: Filling in the Custom Calibration Voltages

At completion, the following dialog box shows. Click OK to finish.

Figure 21: Custom Calibration Successful Completion

If the probe and cable run very far out of specification, the DPS may not be able to linearize the curve. In this case, the software will show an error message as shown in Figure 22.

Fill in the voltages measured at each gap and then click the Generate and Load Linearization button.


Figure 22: Custom Calibration Shortened Curve

If this occurs, verify that the voltages you entered were correct. Verify that your system components combine to the correct length. If all is correct, you can choose to accept the shortened curve or hit cancel and use a different probe and cable. In some cases, probes and cables that are far out of specification can be brought into specification by iterating the custom calibration process several times.

4.2.1 CURRENT LOOP VERIFICATION (MX2034 ONLY)Follow the steps in this section to verify the current loop output for Position or Radial Vibra-tion configured DPS units.

4.2.1.1 POSITION CONFIGURED UNITS

The transmitter current output is linearly proportional to the average probe gap (position) between 4 mA and 20 mA. Use the instruments and equipment shown in Figure 23 to verify a position transmitter current output.

NOTE: Metrix does not recommend using the custom calibration feature to calibrate mismatched systems. Mis-matched systems degrade probe and cable temperature performance.


Figure 23: Current Loop Validation Set Up

At each gap, measure and record the SIG Voltage from the volt meter and the current output measured by the Ammeter.

mils mm SIG Voltage Current

10 0.25

20 0.50

30 0.75

40 1.00

50 1.25

60 1.50

70 1.75

80 2.00

90 2.25 Use the following equation to determine the expected current at each gap.

Current = 16 * (Gap-Bottom Scale Gap) / (Top Scale Gap-Bottom Scale Gap) + 4mA


Example: The configured range is 10 to 90 mils and the current gap is 30 mils.

Bottom Scale Gap = 10 mils

Top Scale Gap = 90 mils

Current = 16 * (30 -10) / (90-10) ) +4mA = 8mA

NOTE: Tolerance is + 0.15 mA.

4.2.1.2 RADIAL VIBRATION

The transmitter current output is linearly proportional to the full scale vibration range between 4 mA and 20 mA. The following equation represents the relationship between the vibration and the loop current:

Vibration = (Current (mA) -4) / 16 * (Full Scale Range) EXAMPLE:

Measured mA Full Scale Vibration Actual Vibration


5. TROUBLESHOOTING

5.1 MX2033 AND MX2034

Symptom Possible Problems Recommended Action

SIG stuck near -21V Probe is disconnected Verify that the probe is properly connected and the gap is in the OK region.

SIG stuck at -Vt SiG shorted to power Disconnect the SIG line at the DPS and measure the DPS voltage between SIG and COM. If this measures correctly, the short is in the field wiring.

SIG stuck 0 < Vout < -0.05V

Probe is shorted

Probe is disconnected (MX2030 or 3300)

Verify that the probe is properly connected and the gap is in the OK region.

SIG stuck at 0 V Signal wire disconnected

Output shorted to common

Power or common discon-nected

Measure between –Vt and COM at the DPS and verify the input power is within the specified range.

Disconnect the SIG wire and mea-sure between SIG and COM at the DPS to verify the SIG out voltage. If SIG out is correct, the field wir-ing is shorted or disconnected at the monitor side.

Scale Factor is high Cable length or probe series is configured incorrectly

Verify that probe and extension cable are of the same series and have the correct system length. Use the custom calibration feature to correct the scale factor for the given probe (see section 4.2)

Scale Factor is low Load impedance is too low Verify that the input impedance of the measuring device is 10 kohms.

Scale Factor is low Scale factor not adjusted for safety barriers

Verify that the monitoring system was correctly configured for safety barriers. With barriers, the scale factor is 192 V/mil.

Scale Factor is low Cable length or probe series is configured incorrectly

Verify that probe and extension cable are of the same series and have the correct system length. Use the custom calibration feature to correct the scale factor for the given probe (see section 4.2)


5.2 MX2034 ONLY

Symptom Possible Problems Recommended Action

Maximum current below 20 mA

Loop resistance too large or power supply too low.

Verify that total loop resis-tance does not exceed the maximum per Installation Manual 100545.

Current output stuck < 3.5 mA

Probe is disconnected or out of range

Verify that the probe is con-nected and the gap is in the specified OK region.

Current output high or low Incorrect 4 – 20 Scale selected

Upload the device informa-tion (see Section 3.5.2) and verify the configured scale.


6. PERFORMANCE GRAPHS

6.1 DRIVER/TRANSMITTER TEMPERATURE RESPONSE

Shown with custom calibration and represent typical performance over temperature, DPS unit only at temperature.

6.1.1 MX2030/BN 3300 5 METER SYSTEM

Figure 24: MX2030 5m System, -35 C to +65 C


Figure 25: MX2030 5m System DSL 0 C to 45 C

Figure 26: MX2030 5m System DSL -35C to +65 C


Figure 27: MX2030 5m System ISF, 0 C to 45 C

Figure 28: MX2030 5m System ISF -35 C to + 65 C


6.1.2 MX2030/BN 3300 9 METER SYSTEM

Figure 29: MX2030 9m System, -35 C to +65 C

Figure 30: MX2030 9m System DSL, 0 C to +45 C


Figure 31: MX2030 9m System DSL, -35 C to +65 C

Figure 32: Mx2030 9m System ISF, 0 C to +45 C


Figure 33: MX2030 9m System ISF, -35 C to +65 C

6.1.3 METRIX/BN 7200 5 METER SYSTEM

Figure 34: 7200 5m System, -35 C to +65 C


Figure 35: 7200 5m System DSL, 0 C to +45 C

Figure 36: 7200 5m System DSL, -35 C to +65 C


Figure 37: 7200 5m System ISF, 0 C to +45 C

Figure 38: 7200 5m System ISF, -35 C to +65 C


6.1.4 METRIX/BN 7200 9 METER SYSTEM

Figure 39: 7200 9m System, -35 C to +65 C

Figure 40: 7200 9m System DSL, 0 C to +45 C


Figure 41: 7200 9m System DSL, -35 C to +65 C

Figure 42: 7200 9m System ISF, 0 C to +45 C


Figure 43: 7200 9m System ISF, -35 C to +65 C

6.2 PHASE DELAY

Figure 44 shows the expected phase shift error as the measured frequency increases.

Figure 44: Phase Delay vs. Frequency


7. TRADEMARKS AND COPYRIGHTS

All trademarks, service marks, and/or registered trademarks used in this document belong to Metrix Instrument Company, L.P. except as noted below:

Bently Nevada, RAM, and NSv are marks of the General Electric Company in the United States and other countries.

Microsoft, Excel, Windows, and Outlook and their respective designs are marks of Microsoft Corporation in the United States and other countries.

© Copyright 2013, Metrix Instrument Company, L.P. All rights reserved.

[email protected]

8824 Fallbrook Dr. Houston, TX 77064, USATel: 1.281.940.1802 • Fax: 1.713.559.9421

After Hours (CST) Technical Assistance: 1.713.452.9703

digital proximity system - metrix vibration · 2018. 12. 3. · digital proximity system operation...

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