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Overview

LR 925/01(-P)

4

ba75825e03

12/2015

OPERATING MANUAL

1

Overview

1.1

Structure and function

Structure

Automatic sensor

recognition

The sensor electronics with the stored sensor data is in the connecting head. 
The data include, among other things, the sensor type and series number. 
With each calibration, the calibration data is written in the sensor and the 
calibration history is recorded. The data is recalled by the meter when the 
sensor is connected and is used for measurement and for measured value 
documentation. Storing the calibration data in the sensor ensures that the 
correct cell constant is automatically used if the sensor is operated with 
several meters.

The digital transmission technique guarantees the failure-free communi-
cation with the meter even with long connection cables. If the sensor firmware 
is enhanced by WTW, it can be updated with the meter.

1.2

Recommended fields of application

Measurements in ultrapure water.

1

Shaft

2

Connecting head with active sensor electronics

3

IDS plug (LR 925/01-P)

4

Connection cable (LR 925/01)

2

3

4

1

LR 925/01

LR 925/01-P

Summary of Contents for LR 925/01

Page 1: ...OPERATING MANUAL ba75825e03 12 2015 LR 925 01 P ULTRAPURE WATER CONDUCTIVITY MEASURING CELL LR 925 01 LR 925 01 P...

Page 2: ...Copyright 2016 Xylem Analytics Germany GmbH Printed in Germany...

Page 3: ...fields of application 4 2 Measurement Operation 5 2 1 Commissioning 5 2 2 Opening and closing the IDS plug connection LR 925 01 P 6 3 Cleaning 7 4 What to do if 8 5 Technical data 9 5 1 General data...

Page 4: ...r is connected and is used for measurement and for measured value documentation Storing the calibration data in the sensor ensures that the correct cell constant is automatically used if the sensor is...

Page 5: ...nsor to the meter The sensor is immediately ready to measure LR 925 01 P Connect the sensor to an IDS connector of the meter To open and close the IDS plug connection please follow the section 2 2 OPE...

Page 6: ...ing device step 1 Use your thumb and index finger to press the clips of the connector togeth er and pull the connector out of the plug step 2 Closing the plug connection Make sure that the plug connec...

Page 7: ...cell Normally the conductivity measuring cell does not age Special measuring media e g strong acids and bases organic solvents or temperatures that are too high may considerably reduce its lifetime o...

Page 8: ...ement delivers implausible conductivity values Measuring range exceeded Contamination in the area of the electrodes Electrodes damaged Make sure the correct sensor is being used for the application Cl...

Page 9: ...rature sensor Integrated NTC 30 30 k at 25 C 77 F Dimensions in mm Weight LR 925 01 Approx 90 g without cable LR 925 01 P Approx 95 g Materials Shaft Stainless steel 1 4571 Connection head LR 925 01 P...

Page 10: ...Pressure resis tance Sensor with connection cable IP 68 2 x 105 Pa or 2 bar Cable plug IP 67 when plugged in The LR 925 01 P meets the requirements according to article 3 3 of the directive 97 23 EC p...

Page 11: ...t99 99 of the final value display after 20 s Accuracy of the temperature sensor 0 2 K Measuring ranges resolution Measured parameter Measuring range Resolution S cm 0 01 19 99 0 0 199 9 0 01 0 1 resis...

Page 12: ...ection cable 3 m AS IDS 3 903 851 IDS connection cable 6 m AS IDS 6 903 852 IDS connection cable 10 m AS IDS 10 903 853 IDS connection cable 15 m AS IDS 15 903 854 IDS connection cable 20 m AS IDS 20...

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Page 14: ...buildings factories and farms In more than 150 countries we have strong long standing relationships with customers who know us for our powerful combination of leading product brands and applications...

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