Teledyne 6200T - Sulfides Analyzer - Manual (Page 132)

Setup Menu Model 6200T Total Sulfur Analyzer
Teledyne Analytical Instruments 132
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
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.