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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.
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