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Trace Oxygen Analyzer Operation
Teledyne Analytical Instruments 41
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4.3.5 System Self-Diagnostic Test
The Model 3000TA has a built-in self-diagnostic testing routine.
Pre-programmed signals are sent through the power supply, output board
and sensor circuit. The return signal is analyzed, and at the end of the
test the status of each function is displayed on the screen, either as OK
or as a number between 1 and 3. (See System Self Diagnostic Test in
Chapter 5 for number code).
The self diagnostics are run automatically by the analyzer
whenever the instrument is turned on, but the test can also be run by the
operator at will. To initiate a self diagnostic test during operation:
Press the System button to start the System function.
TRAK/HLD Auto—Cal
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Use the ◄►arrow keys to blink More, then press Enter.
Version Self—Test
Use the ◄►arrow keys again to move the blinking to the Self–
Test function. The screen will follow the running of the diagnostic.
RUNNING DIAGNOSTIC
Testing Preamp — 83
During preamp testing there is a countdown in the lower right
corner of the screen. When the testing is complete, the results are
displayed.
Power: OK Analog: OK
Preamp: 3