Omega 3200ST, 3400ST Troubleshooting Guide, Symptom Possible Cause Method of Correction

H.Troubleshooting Guide

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

M-4271/0707, pg. 23 of 26