Teledyne 9110T - Nitrogen Oxides Analyzer - Manual (Page 134)

Model 9110T NOx Analyzer Setup Menu
Teledyne Analytical Instruments 134
that the analyzer measures only the light coming from the LED, the analyzer should be supplied with
zero air. The optic test should produce a PMT signal of about 2000±1000 mV.
Section 12.7.12.1 presents instructions for use in troubleshooting and service.
I
MPORTANT I MPACT ON R EADINGS OR D ATA
This is a coarse test for functionality and not an accurate calibration tool.
The resulting PMT signal can vary significantly over time and also
changes with low-level calibration.
5.9.6. ELECTRICAL TEST
The ELECTRICAL TEST function creates a current, which substitutes 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.
Section 12.7.12.2 presents instructions for use in troubleshooting and service.
5.9.7. OZONE GEN OVERRIDE
This feature is used to manually turn the ozone generator off and on. Read Section 13.2.3 to understand
the ozone generator, and refer to Section 12.7.15.1 for instructions on using the override feature in
troubleshooting and service.
5.9.8. FLOW CALIBRATION
This function is used to calibrate the gas flow output signals of sample gas and ozone supply. Section 9.7
presents instructions for flow calibration. Used to adjust the gas flow calculations made by the CPU
based on pressure and flow sensor readings.