Teledyne API T703/T703U Calibrator Operation Manual Calibration and Verification
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6.1.5. O3 PHOTOMETER BACKPRESSURE COMPENSATION CALIBRATION

Any time there is a pneumatic configuration change, there is risk of impacting the
internal measure/reference pressure. To compensate for this, a backpressure
compensation calibration is required each time. Set the calibrator to generate ozone at
the flow rate intended for operation. While the instrument is generating ozone, go to the
SETUP>MORE>DIAG>929>…>BACKPRESSURE COMPENSATION menu and
press ENTR, shown in the following illustration, to initiate the calibration; the operation
will take a few minutes:
GENERATE A-CAL=0.000 LPM
<TST TST> GEN STBY SEQ SETUP
Make sure that the T700 is
generating ozone at the
intended operational flow rate.
SETUP X.X PRIMARY SETUP MENU
GAS SEQ CFG CLK PASS MORE EXIT
SETUP X.X SECONDARY SETUP MENU
COMM FLOW VARS DIAG EXIT
SETUP X.X ENTER PASSWORD
818 ENTREXIT
Toggle these buttons to
enter the correct
PASSWORD - 929 DIAG SIGNAL I/O
PREV NEXT ENTR EXIT
Continue pressing NEXT until ...
DIAG BACKPRESSURE COMPENSATION
PREV NEXT ENTR EXIT
07223C DCN6572