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T703 Calibration and Verification Teledyne API T703 Calibrator Operation Manual
136
8.2. CALIBRATING THE O
3
GENERATOR
The T703 calibrator’s software includes a routine for automatically calibrating the O
3
generator. A calibration
table of drive voltages stored in the T703’s memory is the basis for this calibration. This table is used by the
T703 to set initial O
3
generator drive settings.
8.2.1. O
3
GENERATOR CALIBRATION TABLE
When the T703 is operated in BENCH mode, this table is used for the initial setting only. After a short delay
time, the bench feedback control will take over and control the O
3
generator drive to servo in to the exact
concentration requested.
When the T703 is operated in CONST mode, the initial O
3
generator drive setting will be set by the calibration
table and does not change.
When the T703 is operated in REF mode, the calibration table sets the initial drive setting and then the reference
detector feedback takes over to maintain the lamp at a constant intensity as measured by the reference detector.
The target value for the reference detector for a particular target concentration is also stored in this calibration
table.
The instrument software will interpolate between two values in the table when an intermediate concentration is
requested.
For each point included in the table used by the T703 to calibrate the optional O
3
generator the user can set a
drive voltage and a dwell time for that point. Each point can also be individually turned off or on.
07223B DCN6378