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Teledyne API Model 401 O
3
Photometric Calibrator Instruction Manual, 01124, Rev. J2
Next, to automatically calibrate all the DACs, press SETUP-MISC-D/A-CAL-DAC. The display
will show the percent completion as the analyzer goes through the procedure. You must calibrate
the ADC before calibrating the DACs because the ADC is used during the DAC calibration
procedure. Once the ADC is calibrated, you may recalibrate the DACs anytime simply by
pressing SETUP-MISC-D/A-CAL, ENTR, ENTR, ENTR, ENTR.
8.3 Output Voltage Range Changes
Output voltage ranges are set by jumper placement on the V/F board. To change the range for the
analog outputs:
1. Turn off instrument power. Remove instrument cover. Locate the V/F board near the top of
the drawing using Figure 1-7.
2. Locate jumpers B6, B7, B9 along the top edge of the card. Select the desired range per the
table in drawing 00515 located in Appendix D.
NOTE
To adjust analog recorder offset, see Section 4.10.
8.4 Flow Readout Adjustment
The sensor module in the M401 consists of one flow sensor and two pressure sensors. See
Figure 8-2 for a diagram of this module. From these three sensors three values are computed and
displayed on the front panel TEST function area. These are:
1. Sample flow
2. Sample cell pressure
3. O
3
GEN flow
8-4