Teledyne T200 Operation Manual page 268

Troubleshooting & Service
12.7.12.2. ELECTRICAL TEST
SAMPLE RANGE=500.0 PPB
<TST TST> CAL
Continue pressing <TST or TST> until ...
SAMPLE PMT=2750 MV
<TST TST> CAL
SETUP X.X PRIMARY SETUP MENU
CFG DAS RNGE PASS CLK
SETUP X.X SECONDARY SETUP MENU
COMM VARS DIAG
266
Teledyne API – T200 NO/NO2/NOx Analyzer Operation Manual
The electrical test function creates a current, which is substituted for 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.
To activate the electrical test, press:
NOX= XXXX
SETUP
NOX= XXXX
SETUP
MORE EXIT
EXIT
While the ETEST is
active PMT should =
2000 mv ± 1000mv
Concentration display
continuously cycles
through all gasses.
SETUP X.X ENTER PASSWORD
8 1 8
DIAG SIGNAL I/O
PREV NEXT
Continue pressing NEXT until ...
DIAG OPTIC ELECTRICAL TEST
PREV NEXT
DIAG ELEC PMT=2750 MV
<TST TST> CAL
ENTR EXIT
ENTR EXIT
ENTR EXIT
NOX= XXXX
EXIT
06858E DCN7057