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Teledyne API - T100 UV Fluorescence SO2 Analyzer Troubleshooting & Service
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12.1.3. USING THE DIAGNOSTIC SIGNAL I/O FUNCTIONS
The signal I/O parameters found under the diagnostics (DIAG) menu combined with a
thorough understanding of the instrument’s principles of operation (refer to Section 13)
are useful for troubleshooti
ng in three ways:
The technician can view the raw, unprocessed signal level of the analyzer’s critical
inputs and outputs.
All of the components and functions that are normally under instrument control can
be manually changed.
Analog and digital output signals can be manually controlled.
This allows a user to systematically observe the effect of these functions on the
operation of the analyzer. Figure 12-2 shows an example of how to use the signal I/O
menu to view the raw v
o
ltage of an input signal or to control the state of an output
voltage or control signal. The specific parameter will vary depending on the situation.
Please note that the analyzer will freeze its concentration output while in the diagnostic
signal I/O menu. This is because manually changing I/O outputs can invalidate the
instrument reading.
06807C DCN6650