Teledyne API – Model T300/T300M CO Analyzer
Setup Menu
127
5.9.4.
ELECTRICAL TEST
The electrical test function substitutes simulated signals for the the IR photo detector’s
CO MEAS and CO REF signals, generated by circuitry on the sync/demod board. This
function tests the filtering and amplification functions of that assembly along with the
A/D converter on the motherboard. It should be noted that this will not test the IR photo
detector itself. While in this mode the user can also view the same test functions
viewable from the main SAMPLE display. When the test is running, the concentration
reported on the front panel display should be at or near 40.0 ppm.
SAMPLE
RANGE=50.0 PPM CO= XX.XX
<TST
TST> CAL
SETUP
SETUP X.X
SECONDARY SETUP MENU
COMM
VARS
DIAG
EXIT
SETUP X.X
PRIMARY SETUP MENU
CFG DAS RNGE PASS CLK
MORE
EXIT
DIAG
SIGNAL I/O
PREV
NEXT
ENTR
EXIT
SETUP X.X
ENTER PASSWORD
8
1
8
ENTR
EXIT
Continue pressing
NEXT
until ...
DIAG OPTIC
ELECTRICAL TEST
PREV NEXT
ENTR
EXIT
DIAG ELEC
RANGE=50.0 PPM CO= 40
<TST
TST>
CAL
EXIT
Press
<TST TST>
to view Test Functions.
NOTE:
CO MEAS
and
CO REF
will be artificially
altered
to enforce a CO reading of
40.0
ppm.
All other Test Functions will report the correct
operational value.
5.9.5.
DARK CALIBRATION
The dark calibration test interrupts the signal path between the IR photo-detector and the
remainder of the sync/demod board circuitry. This allows the instrument to compensate
for any voltage levels inherent in the sync/demod circuitry that might affect the
calculation of CO concentration. For details see Section 9.6.1.
5.9.6.
PRESSURE CALIBRATION
A sensor at the exit of the sample chamber continuously measures the pressure of the
sample gas. The data are used to compensate the final CO concentration calculation for
changes in atmospheric pressure and are stored in the CPU’s memory as the test function
PRES
(also viewable via the front panel). For details see Section 9.6.2.
06864D DCN7562
Summary of Contents for T300
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