Xylem FC220 OPEN CHANNEL FLOW MONITOR - Manual (Page 18)

Global Water
800-876-1172
• globalw.com
- 18 -
XIII. Maintenance and Troubleshooting
a. Global Water recommends verifying the sensor’s calibration every 6
months.
b. The screen on the end of the sensor must be periodically checked for
clogging from mud, sludge, and other debris. Wash the screen with clean
water and/or scrub it gently with a toothbrush. Do not insert objects
through the screen, as this may cause damage to the sensor.
c. In battery operated systems it is recommended that the battery be replaced
every 3-4 years, more often in harsh environments or when the battery is
allowed to be completely discharged.
Trouble Shooting
d. Verify that the power source is supplying correct voltage to the FC220
and to the sensor.
e. Make sure that the vent tube has not been kinked or sealed. The sensor
uses this tube to compensate for barometric pressure changes.
f. Check the sensor’s calibration.
g. Clean the sensor following the maintenance instructions.
Testing the sensor:
To check the level sensor calibration separate from the flow monitor, you
will need:
1 column of water (the closer the depth is to the maximum range of the
sensor the better the calibration will be)
1 power supply
1 current meter
Connecting wires as necessary
Unplug the Flow Meter and disconnect the sensor. Connect the
sensor to the power supply and current meter in the following way.
Attach the black wire to the positive input of the current meter. Connect
the ground terminal of the power supply to the ground of the current
meter. Attach the red wire to the positive terminal of the power supply.