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Teledyne API – Model T300/T300M CO Analyzer Calibration Procedures
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9.6. CALIBRATION OF THE T300/T300M’S ELECTRONIC
SUBSYSTEMS
9.6.1. DARK CALIBRATION TEST
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 effect the
calculation of CO concentration.
Performing this calibration returns two offset voltages, one for CO MEAS and one for
CO REF that are automatically added to the CPU’s calculation routine. The two offset
voltages from the last calibration procedure may be reviewed by the user via the front
panel display. (See also Section 5.9.5).
To activate the dark calibra
tion procedure or review the results of a previous calibration,
press:
06864B DCN6314