Xylem WL450 User Manual

Quick Reference

L450 Level Sensor

Pressure Transducer for measuring water level,

Pressure sensor with analog 4-20mA output and Barometric Pressure compensation.

Basic Handling & Operation:

• Ensure that the cable is handled & stored with large loops and NOT

KINKED (which blocks the barometric pressure compensation tube).

Installation Notes:

Groundwater Installations:

• Terminate cable into a dry enclosure – to avoid moisture entering pressure compensation tube in cable.

• Secure the Sensor Cable: Ensure that the cable is clamped securely

to topside hardware BEFORE deploying sensor down well. DO NOT EXCEED THE MAXIMUM RATED DEPTH OF THE SENSOR OR IRREPARABLE DAMAGE TO THE SENSOR MAY OCCUR!

• It is not necessary to locate the sensor at the well's bottom – merely below the lowest likely water level.

• Avoid cable entanglements by installing sensor at least ten feet above the well pump.

Open-Channel Installations:

• Keep debris, silt or mud away from

sensor (eg: Open Channel installations) by housing sensor in

perforated conduit or wellscreen.

• Use Long-Sweep Elbows (PVC conduit fittings) to

ease cable deployment through conduit for riverbank monitoring of flow / level in open channels.

Big Loops, No Kinks

Vent cable

box

in dr

Clamp Cable

Securely

Sensor: 10 ft ( =3m ) above

pump

Rev. E

Enclosure

sensor

pump

AIL001-QS-WL450Rev-E.doc

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Quick Reference

L450 Level Sensor

Wiring Notes:

• Connect sensor cable to Analog Input Current terminals of data

collection device (e.g.: Global GL500 Data Logger, PLC, RTU, etc.)

• When testing or troubleshooting the level sensor, disconnect it from your system power source and connect to an independent battery or

power supply and read the output with a multimeter.

• This senor requires a minimum ½ second warm-up time to provide an accurate readout.

• To test the actual sensor output, submerse sensor in a water column and look for a current output at or above 4mA and below 20mA. The output increases with increasing depth. DO NOT EXCEED THE MAXIMUM RATED DEPTH OF THE SENSOR OR IRREPARABLE DAMAGE TO THE SENSOR MAY OCCUR!

Black

White

WL450 sensor

+8-28VDC Supply

4-20mA

4-20mA Input

ONLY CONNECT

SENSOR WITH THE

POWER TURNED OFF

+8-28 VDC

Black

WL450 sensor

GND

White)

RS485

RS485A

Blue)

Rev. E

RS485B

Yellow

AIL001-QS-WL450Rev-E.doc