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Model 9110T NOx Analyzer Troubleshooting & Service
Teledyne Analytical Instruments 301
12.7.12.2. Electrical Test
The electrical test function creates a current, which is substituted for the PMT signal and feeds it into the
preamplifier board.
This signal is generated by circuitry on the pre-amplifier board itself and tests the filtering and
amplification functions of that assembly along with the A/D converter on the motherboard.
It does not test the PMT itself.
The electrical test should produce a PMT signal of about 2000 ±1000 mV.
To activate the electrical test, press: