Teledyne 3160 manual Troubleshooting, Symptom Cause Correction

5 Maintenance & Troubleshooting

Analyzers equipped with a scrubber should only be used with inert gases and saturat- ed hydrocarbons.

5.2Troubleshooting

To troubleshoot the analyzer, identify the problem in the following list and then

follow the procedures to correct the problem. If you cannot identify the problem, or if you cannot resolve the problem after following the corrective procedure, call a service repre- sentative.

Symptom	Cause	Correction
LCD or LED display will not	Faulty LCD or LED.	Return the unit to factory.
light.
Display too bright.		Remove analyzer cover. Adjust
		potentiometer located behind
		LCD display.
No analog output.	Faulty electrical connection.	Remove analyzer cover. Check
		PC board connections and
		make sure that they are firmly
		seated.
Zero gas signal >2 PPM.	Bad sensor.	Replace sensor.
	High O2 level.	Check zero gas inlet connec-
		tion.
Slow response/recovery time.	Bad sensor.	Replace sensor.
Displays “--” value.		Re-zero sensor.

Can't calibrate (with sensor installed). Display reads “cell too strong” or “cell too weak.”

a)The wrong span gas concentration has been entered.

a)Re-enter span gas concen- tration.

b)Replace or reinstall sensor.

No sample gas flow.	a)	The pneumatic air supply
		pressure is too low, making
		the valves stick.
	b)	The sample supply pressure
		is too low.

a)Raise air supply pressure to at least 70 psig.

b)Check back panel connec- tions. Raise sample supply to at least 5 psig but within ±2 psig of the span gas pressure.

5-2 TELEDYNE ANALYTICAL INSTRUMENTS