Teledyne 7500ZA - Infrared Gas Analyzer - Manual (Page 102)

Error Messages Model 7500ZA
Teledyne Analytical Instruments 86
8.1 Troubleshooting
When error No. 1 occurs, remove the top cover of the analyzer and
check the LED on the light source PCB. If the LED is off, then the error
is caused by a light source disconnection.
Errors 1-3 and10 indicate an analyzer failure or fault. Contact TAI
for assistance.
Errors 4-8 indicate that the calibration procedure may be incorrect.
Check the following items, and if the error still occurs, contact TAI.
1. Is the calibration gas flowing to the analyzer?
2. Does the calibration operation match the supplied gas? (For
example, zero calibration is performed while flowing the span
gas.)
3. Does the supplied gas concentration match the gas concentration
set in the calibration concentration setting?
Also, if errors 5 and 7 occur, you can perform calibration forcibly,
following the procedure. This is used as a fault recovery when
calibration fails and calibration contents are invalid or wrong.
Typical Error Screen Display
For Errors 1-4, 6, and 8-10: