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Teledyne API - T100 UV Fluorescence SO2 Analyzer SETUP Menu
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5.9.4. OPTIC TEST
The optic test function tests the response of the PMT sensor by turning on an LED
located in the cooling block of the PMT (refer to Figure 13-18). The analyzer uses the
light emitted
from the LED to test its photo-electronic subsystem, including the PMT
and the current to voltage converter on the pre-amplifier board. To ensure 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.
Access the Optic Test from the DIAG Menu (refer to Figure 5-16), then press:
DIAG SIGNAL I / O
PREV NEXT JUMP ENTR EXIT
DIAG OPTIC RANGE = 500.000 PPB SO2=XXX.X
<TST TST> EXIT
Press NEXT until…
DIAG OPTIC TEST
PREV NEXT ENTR EXIT
Press TST until…
DIAG ELEC PMT = 2751 MV
SO2=XXX.X
<TST TST> EXIT
While the optic test is
activated, PMT should be
2000 mV ± 1000 mV
Figure 5-30: DIAG – Optic Test
IMPORTANT
IMPACT ON READINGS OR DATA
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.
06807C DCN6650