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T703 Calibration and Verification Teledyne API T703 Calibrator Operation Manual
134
8.1.4. O
3
PHOTOMETER DARK CALIBRATION
The Dark Calibration Test turns off the Photometer UV Lamp and records any offset signal level of the UV
Detector-Preamp-Voltage to Frequency Converter circuitry. This allows the instrument to compensate for any
voltage levels inherent in the Photometer detection circuit that might affect the output of the detector circuitry and
therefore the calculation of O
3
concentration.
SETUP X.X O3 GAS CONFIG
MODE ADJ PHOT EXIT
The DARK CAL procedure progresses automatically
until ...
SETUP X.X DARK CAL 34% COMPLETE
SETUP X.X CALIBRATING DARK OFFSET
SETUP X.X O3 GAS CONFIG
BCAL DARK EXIT
DARK CAL
Successful?
Yes
No
SETUP X.X INVALID DARK CAL OFFS=XXXX.X MV
STANDBY ACT =STANDBY
<TST TST> GEN STBY SEQ SETUP
SETUP X.X PRIMARY SETUP MENU
O3 SEQ CFG CLK PASS MORE EXIT
07223B DCN6378