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Oil in Water Analyzer Operation 3
Part I 3-9
Teledyne Analytical Instruments
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After two seconds it will return to the System menu.
3.3.4 System Self-Diagnostic Test
The Model 6600 has a built-in self-diagnostic testing routine. Pre-pro-
grammed signals are sent through the power supply, output board, preamp
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 1024. (See System Self Diagnostic Test in chapter 5
for number code.)
Note: The sensor will always show failed unless Zero fluid is present
in the sampling cell at the time of the SELF-TEST input thru the
sample inlet.
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. If
any of the functions fails, the System Alarm is tripped, but is not tripped at the
startup because it might give false alarm after a power failure. To initiate a self
diagnostic test during operation enter the System menu.
DIG_FILT SELF-TEST
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Use the UP/DOWN again to move the blinking to the SELF–TEST and
Enter. The screen will follow the running of the diagnostic.
RUNNING DIAGNOSTIC
Testing Preamp — Cell
When the testing is complete, the results are displayed.
Power: OK Analog: OK
Cell: 2 Preamp: 3
The module is functioning properly if it is followed by OK. A number
indicates a problem in a specific area of the instrument. Refer to Chapter 5
Maintenance and Troubleshooting for number-code information. The results
screen alternates for a time with:
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Then the analyzer returns to the initial System screen.