Xylem WL450 User Manual
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y
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
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