Omega Engineering FLR 1000 Series, User Manual

Page: 26 / 29

pg. 26 of 29
H. Troubleshooting Guide
Symptom Possible Cause Method of Correction
Unit Leaks Fittings not tight enough.
Sensor assembly cracked
Tighten fittings (see section
B4)
Unit must be returned for
repair (see Section J)
No output signal or
flow indication No power or low power
No flow passing through
unit
Output shorted or
overloaded
Improper connection
Moisture on internal
electronics
Output circuitry damaged
Apply correct power
Display or output should
read zero.
Check electrical connections
(see section B5)
Check electrical connections
(see section B5) and ensure
connector is correctly
plugged in.
Allow unit to dry out in a
dry environment.
Unit must be returned for
repair (see Section J)
Flow indication
“bounces” or
fluctuates Flow is actually fluctuating
Using a pulsatile or piston
pump that causes a
pulsating flow of gas
Not using the fittings
supplied by the
manufacturer
Moisture in sensor
Turbulence in tubing or
sensor
Fluctuating input power
Mechanical sensor assembly
damaged
Correct flow source to
obtain steady flow
Switch to a stable source of
gas
Use the supplied fittings
Remove moisture and allow
unit to dry out
Straighten the inlet tubing
or lengthen it to at least 6”
(150mm)
Correct the power source or
change to a regulated
supply
Unit must be returned for
repair (see Section J)