1 purpose€¦ · 2016.01.14 hro page 10 of 15 5.1 connector box pin description the output from...

Microwave Sensor 87150.020/.022/.023/.024/.025

Datasheet

www.work-microwave.de

Date Rev:

2016.01.14 HRO

page

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1 Purpose

Sensor for measuring moisture content. Single sided sensor for measuring with high accuracy.

2 Calibration

For absolute measurement a calibration is necessary.

3 Construction

The sensor is available with a customer specific flange. To install the sensor a connector box and aconnection cable up to 35m is used. At the connector box the supply voltage of 24V is connected and the measured signals are available. The measured signals of the sensor can be sent via Ethernet or 4 - 20mA current loop.

Figure 1: Sensor with customer specific flange d=195mm, connector cable and connector box

Datei: P:\8x\87170\Datenblätter_Sensor\doc\DataSheet_Sensor_Single_Sided_en.odt


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Figure 2: Sensor with customer specific flange d=128mm

Figure 2: Sensor with small resonator head d=50mm



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Figure 2: Sensor with small resonator head d=50mm mounted under 90°



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4 Dimensions

4.1 Sensor with small resonator head d=50 mm



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4.2 Sensor with small resonator head mounted under 90°



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4.3 Sensor with flange with D=128mm



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4.4 Sensor with flange with D=195mm


24

152,5

16

18,5

3,5

5,5

89,6

Deta i l X

30

R15

,2

Fase 0,5/45°

Deta i l X

15,2

D1

95

flange

sensor

R10 R

77,5

R97

,5

R9

45

sensing area


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4.5 Principle of operation

(1) sense area d=20mm covered with ceramic plate

(2) sensor head with flange and resonator , max. temperature 120°C

(3) sensor body with electronic parts, max. temperature 70°C

(4) M12 connector

(5) max. temperature 80°C

(6) temperature sensor


1

2

4

3

5

6

190

mm

20 mm


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5 Connector Box

The sensor is connected via a connector box. The cable between the sensor and connector box can be up to 35m, as default the sensor is shipped with a 10m long cable.

female connector M12 4 pole male connector M12 5 pole



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5.1 Connector Box Pin Description

The output from the sensor is available via Ethernet and current loop 4..20 mA. Both outputs are active and can be used in parallel.

Ethernet: female connector M12 4 pole

pin signal

Pin 1 (ge) TX+

Pin 2 (ws) RX+

Pin 3 (or) TX-

Pin 4 (bl) RX-

power supply 24V and 20mA current loop: male connector M12 5-pole

pin signal

Pin 1 (br) Ub +24 VDC

Pin 2 (ws) current loop 1 moisture content

Pin 3 (bl) Ub 0V

Pin 4 (sw) current loop 2 temperature

Pin 5 (gr) Ub 0V

The sensor has 2 built in 4...20mA current loops. On pin 2 the signal for the moisture and on pin 4 the signal of a temperature sensor is sent. The temperature sensor is located directly under the sensing area.

At current loop 1 you get the output signal for the moisture content.4 mA : max. moisture content20 mA : min. moisture contentThis is directly the measured value from the sensor. For the unloadedsensor the current is typ. 19 mA.To get the current linear to the moisture content the sensor have a build in correction capability.

At current loop 2 you get the temperature of the sensor head.4 mA : 0°20 mA : 100°with current is linear to temperature.



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6 Current loops

The output range can be set at factory to the following ranges:0 ... 20 mA4 ... 20 mA0 ... 24 mA

The default range is : 4 ... 20mA

It is recommended to use a termination of 500 Ohm for the current loops. A maximum of 1 kOhm is possible.With a termination of 500 Ohm the output voltage for the A/D converter are 2,0 ... 10,0 V.

figure 9: current loops


500 R500 R

connector box

+24V

0 V

0 V

I Out 2

I Out 1

pin 1

pin 3

pin 4

pin 5

pin 2

power supply 24V

A/D converter

A/D converter

male connector 5p

pin 3 and pin 5 are connected internally


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6.1 Block diagram microwave sensor and connector box


Q:\8x\8715x\87150\Manual\bilder\87150_bsb_en_2.WMF

microwave sensor

cable

connector box

connector 4pfor Ethernet

connector 5pfor supply voltage 24VDCandcurrent loops output

Sense area

temperature sensor

Sensor head

resonator

sensor electronic

processor

currentloops


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7 Example for Installation of the Microwave Sensor

The microwave sensor is mounted under a shute, so that the sensor has direct contact to the material to measure.

The measurement range of the sensor is up to 30 mm. To get the correct value for the moisture content, the thickness of the measured material must be more then 30 mm.



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8 Order Information

8.1 Sensor

Model Description

87150.020 - Sensor with small resonator head- with 4 - 20mA current loop- with Ethernet- measurement range of temperature sensor 0°C ... 100 °C

87150.022 - Sensor with small resonator head mounted under 90°- with 4 - 20mA current loop- with Ethernet- measurement range of temperature sensor 0°C ... 100 °C

87150.023 - Sensor with resonator head with flange with D=195mm- with 4 - 20mA current loop- with Ethernet- measurement range of temperature sensor 0°C ... 100 °C

87150.024 - Sensor with resonator head with flange with D=128mm- with 4 - 20mA current loop- with Ethernet- measurement range of temperature sensor 0°C ... 100 °C

Option - measurement range of temperature sensor 0°C ... 120 °C

8.2 Sensorkit

Model Description

Sensorkit Sensor 87150.0xx

Connector Box 87152.002

Connector Cable M12/M12 (Sensor to Connector box) 03540.002 Length 10m

Option Connector Cable M12/M12 Length 2mConnector Cable M12/M12 Length 20mConnector Cable M12/M12 Length 35m

Customer specific flange

Ethernet cable M12/RJ45 (Connector box to PC )Power Supply 24V



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9 Technical Data

Description

Sensor for measuring moisture content

housing made of V1.4571 (V4A) or V1.4301

measuring prinziple

Resonance methodSensor with direct contact to measured material

measurement range

moisture 0% ... 60%

temperature 0°C ... 100 °C option: 0°C ... 120 °C

up to 30 mm distance depending on the electrical characteristics of the measured material

sensor output

digital Ethernet

analog 4...20 mA Current Loop

temperature range

sensor body

sensor head

0°C ... +80°C

0°C ... +120°C

power supply

supply voltage +22 ... +30 Vtyp: +24 V

supply current

operating current ca. 280 mA @ 24 V

switch-on current < 1 A

weight

weight ca. 1,55 kgfor version with small resonator head


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