TELEDYNE API T200U NOy, Руководство оператора

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Model T200U NOy Option Manual Addendum
07303E DCN7996 31
7.0 TROUBLESHOOTING AND 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.
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 unit 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.
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.
7.1.3 501 NOy Bypass Pump Diagnostic Procedures
The 501 NOy bypass pump is capable of maintaining a total bypass flow rate of
~2.2 lpm. If flow checks indicate a fall off in bypass flow, the pump may need
servicing. Check the pump, inlet fittings, and analyzer for leaks first. If other
causes have been eliminated, rebuild the pump.