TROUBLESHOOTING
FPR300/310 SERIES INSTRUCTIONS
Page 9
omega.com
Problem
Probable Cause
Things to Try...
No signal after installation
Insufficient flow
Consult Flow Rate Chart
Reduce pipe size or use different sensor
Bad connections to control
electronics
Check connections at control:
Red (+), Black (-), White (signal)
Incompatible control
Use 6–36 Vdc power supply
Add pull up resistor, if using current-sourcing
device
Damaged or missing rotor
Remove flow sensor from fitting and check for free
spinning; replace rotor
Failed magnetic sensor
Replace magnetic sensor
Inaccurate metering
Not enough straight pipe
between meter and severe flow
disturbance
Move meter away from flow disturbance or field
calibrate
Wrong K-Factory entered
Check fitting for K-Factor, check indicator to see if
it is entered properly ("Set K" on DPF143/144)
Magnetic sensor failing to pick up
each blade
Remove flow sensor from pipe. If indicator is
DPF143/144, set K to 1.00, turn rotor slowly by
hand, indicator should count each blade; replace
sensor
Wrong time units on flow
indicator
If using DPF143/144, check left side of display (sec,
min, hr, day); change to desired unit
