Teledyne T101, Operation Manual, Page: 101 / 375

Teledyne ML – T101 Operation Manual Operating Instructions
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4.6.4. 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 (Fig. 10-15). 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 make sure 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. To activate the electrical test
press:
SAMPLE RANGE = 500.0 PPB H2S =XXX.X
< TST TST > CAL SETUP
SAMPLE ENTER SETUP PASS : 818
8 1 8 ENTR EXIT
SETUP X.X PRIMARY SETUP MENU
CFG DAS RNGE PASS CLK MORE EXIT
SETUP X.X SECONDARY SETUP MENU
COMM VARS DIAG EXIT
DIAG SIGNAL I / O
NEXT
ENTR EXIT
DIAG OPTIC RANGE = 500.000 PPB SO2=X.XXX
<TST TST> EXIT
Press NEXT until…
DIAG OPTIC TEST
PREV NEXT ENTR EXIT
Press TST until…
DIAG ELEC PMT = 2751 MV
SO2=X.XXX
<TST TST> EXIT
While the optic test is activated,
PMT should be 2000 mV ± 1000 mV
NOTE
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.