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Calibration and Verification Teledyne API T703/T703U Calibrator Operation Manual
130
6.1.4. 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
07223C DCN6572