Calibration and Verification Teledyne API T703/T703U Calibrator Operation Manual
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6.2. CALIBRATING THE O
3
GENERATOR
The T703/T703U calibrator’s software includes a routine for automatically calibrating
the O
3
generator. A calibration table of drive voltages stored in the calibrator’s memory
is the basis for this calibration. This table is used by the T703/T703U to set initial O
3
generator drive settings.
6.2.1. O
3
GENERATOR CALIBRATION TABLE
When the T703/T703U 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 it 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/T703U 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/T703U to calibrate the 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.
