Teledyne T703, T703U 8. GENERAL TROUBLESHOOTING & SERVICE

Teledyne API T703/T703U Calibrator Operation Manual General Troubleshooting & Service
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8. GENERAL TROUBLESHOOTING & SERVICE
This section contains a variety of methods for identifying and solving performance
problems with the calibrator.
NOTE
The operations outlined in this chapter must be performed by qualified maintenance
personnel only.
WARNING
 Risk of electrical shock. Some operations need to be carried out with the
instrument open and running.
 Exercise caution to avoid electrical shocks and electrostatic or mechanical
damage to the calibrator.
 Do not drop tools into the calibrator or leave those after your procedures.
 Do not shorten or touch electric connections with metallic tools while operating
inside the calibrator.
 Use common sense when operating inside a running calibrator.
8.1. GENERAL TROUBLESHOOTING
The T703 Photometric Calibrator has been designed so that problems can be rapidly
detected, evaluated and repaired. During operation, it continuously performs diagnostic
tests and provides the ability to evaluate its key operating parameters without disturbing
monitoring operations.
A systematic approach to troubleshooting will generally consist of the following five
steps:
1. Note any warning messages and take corrective action as necessary.
2. Examine the values of all TEST functions and compare them to factory values.
Note any major deviations from the factory values and take corrective action.
3. Use the internal electronic status LEDs to determine whether the electronic
communication channels are operating properly.
 Verify that the DC power supplies are operating properly by checking the
voltage test points on the relay PCA.
 Note that the calibrator’s DC power wiring is color-coded and these colors
match the color of the corresponding test points on the relay PCA.
4. Suspect a leak first!
 Technical Support data indicate that the majority of all problems are eventually
traced to leaks in the internal pneumatics of the calibrator or the diluent gas and
source gases delivery systems.
 Check for gas flow problems such as clogged or blocked internal/external gas
lines, damaged seals, punctured gas lines, a damaged / malfunctioning pumps,
etc.
07223C DCN6572