IPF Rev0204
26
Figure 4. Flow Sensor Maintenance
FLOW SENSOR MAINTENANCE
It is recommended that the flow sensor be cleaned during the yearly calibration
check.
Depending on the environment that the flow tube is used in, it is possible that
mud, grass, algae, or other materials may collect on the paddlewheel of the flow sensor
and require it to be cleaned from time to time.
Remove the flow sensor and clean the it with a mild soap and clean water. Make
sure the paddlewheel spins freely.
Remove Flow Sensor
1. Remove retaining nut.
2. Slide flow sensor out of sensor housing.
Install Flow Sensor
1. Insert flow sensor into sensor housing. Align flat spot on sensor rim with
alignment tab and make sure o-ring is in groove.
Note:
The retainer cap only needs to be hand tightened. There is an inside
lip that will stop the cap from turning when it makes contact with the
alignment tab. This provides the correct pressure to make the seal at the
o-ring. Make sure the flow sensor does not disengage from the alignment
tab and rotate.
2. Install retainer cap and hand tighten.
Retainer
Cap
Paddle Wheel
Flow Sensor
O-Ring
Alignmet
Tab
Typical
Flow Tube
Sensor
Housing
