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07303C DCN6646 31
7.0 TROUBLESHOOTING, ADJUSTMENTS
CAUTION!
The operations outlined in this section must be performed by qualified
maintenance personnel only!
This section of the manual contains information on diagnosing and repairing
instrument performance problems. It provides troubleshooting procedures that
address problems to the board level.
As a guide to troubleshooting, think of the T200U-NOy as two systems:
pneumatics and electronics.
Pneumatics - Over 50% of all instrument problems are traced to pneumatic
leaks. Suspect a leak first.
Electronics – external Converter temp control board or DC power supply for
the converter temperature readout.
Another trouble-shooting tip has to do with incorrect span gas concentration:
This could come either from the calibrator itself or from incorrectly
entering the expected span gas concentration in the instrument.
If the instrument does not respond to span gas, check troubleshooting
section in the T200 manual.
The above should get you started in diagnosing and repairing the most common
faults. If these reasons have been eliminated and there are still problems with the
unit, the next thing to do is a Factory Calibration covered in the T200 manual. If
difficulties persist, contact our service department. The 800 telephone number is
on the cover page of this manual.
7.1 Operation Verification – Diagnostic Techniques
This section provides guidance on diagnosing some possible problems.
7.1.1 Pneumatic System
Refer to Figure 5 for a diagram of this system’s pneumatics, to be used in
conjunction with diagnostics and troubleshooting.
7.1.2 Leak Check
Refer to Section 6.6 for the leak check procedure.