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Operating Instructions
Teledyne API - Model T200H/T200M Operation Manual
158
4.13.7.2. 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 the following touchscreen button sequence.
SAMPLE RANGE = 500.0 PPB NOX=X.X
< TST TST > CAL
SETUP
SETUP X.X
PRIMARY SETUP MENU
CFG DAS RNGE PASS CLK
MORE
EXIT
SETUP X.X
SECONDARY SETUP MENU
COMM VARS
DIAG
ALRM
EXIT
DIAG
SIGNAL I / O
NEXT
ENTR EXIT
DIAG OPTIC
A1:NXCNC1=100PPM NOX=XXX.X
<TST TST>
EXIT
SETUP X.X
ENTER DIAG PASS: 818
8 1 8
ENTR
EXIT
Press
NEXT
until…
DIAG
OPTIC TEST
PREV NEXT
ENTR
EXIT
Press
TST
until…
DIAG ELEC
PMT = 2751 MV
NOX=X.X
<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.
07270D DCN7141
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