Troubleshooting Guide - Omega 3200 User Manual

H.

Troubleshooting Guide

Symptom
Clicking noise from
controller
No response
Inaccurate control
Possible Cause
Unit in error mode
Unit wired incorrectly
Loose connection
Damaged connector pins
Blocked flow path
Piping leak before sensor
Insufficient power
Output load resistance too low
Flow too low for the unit
Unit damaged or faulty
Particles in flow path
Flow path obscured
Unit calibrated for a different
gas
Gas composition is variable
Fittings have been changed
Moisture in gas
Insufficient warm-up period
Zero drift
The gain potentiometer has
been adjusted
Unit needs recalibration
Flow too high for the unit
Method of Correction
Check there is sufficient
pressure and that the flow
path is not restricted or
blocked
Check wiring is according to
Section B5
Check all connectors and
wiring
Contact Omega Engineering
Check flow path for
obstructions.
Check all piping and
connections.
Check the power supply
output and increase if
necessary
Ensure the voltmeter or
data acquisition system or
display has an impedance of
greater than of 2.5kohm
Ensure that the flow being
measured is within the
capabilities of the unit
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Add filtration before the
sensor.
Remove any debris or
blockage in the flow path
eg. PTFE tape.
Check calibration certificate
and apply a "K" Factor to
readings if necessary.
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Replace the factory installed
fittings
Ensure gas is clean and dry
Allow the unit to warm-up
for at least 5 minutes.
Verify the zero and adjust
as necessary as explained in
Section C
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Ensure that the flow being
measured is within the
capabilities of the unit
M-4271/0707, pg. 23 of 26