Analytical Industries GPR-2800 AIS ATEX Oxygen Analyzer - Manual (Page 23)

Advanced Instruments Inc.
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5. Advance the reverse shade cursor using the ARROW keys to highlight ZERO CALIBRATE.
6. Press the ENTER key to select the highlighted menu option.
7. The following displays appear:
0.000 %
ZERO
CALIBRTION
ENTER TO CALIBRATE
MENU TO ABORT
8. Press the ENTER key to calibrate or MENU key to abort and return to SAMPLING mode.
9. Allow approximately 60 seconds for the calibration process while the processor determines whether the signal output or
reading has stabilized within 60% of the full scale low range.
10. Both the Zero Calibrate and Span Calibrate functions result in the following displays:
PASSED
CALIBRATION
OR
FAILED
CALIBRATION
The maximum zero calibration adjustment permitted is 50% of the lowest full scale range available. Accordingly, the
transmitter’s ZERO has not been adjusted prior to shipment because the factory conditions are different from the application
condition at the user’s installation.
Default Zero
The software will eliminate any previous zero calibration adjustment and display the actual the signal output of the sensor at a
specified oxygen concentration. For example, assuming a zero gas is introduced, the display will reflect an oxygen reading
representing basically the zero calibration adjustment as described above. This feature allows the user to test the sensor’s signal
output without removing it from the sensor housing.
1. Access the MAIN MENU by pressing the MENU key.
2. Advance the reverse shade cursor using the ARROW keys to highlight CALIBRATION.
3. Press the ENTER key to select the highlighted menu option.
4. The following displays appear:
MAIN MENU
AUTO SAMPLE
MANUAL SAMPLE
CALIBRATION
CONFIG ALARMS
BYPASS ALARMS
>>>
CALIBRATION
SPAN CALIBRATE
ZERO CALIBRATE
DEFAULT SPAN
DEFAULT ZERO
OUTPUT SPAN
OUTPUT ZERO
5. Advance the reverse shade cursor using the ARROW keys to highlight DEFAULT ZERO.
6. Press the ENTER key to select the highlighted menu option.
7. The following display appears and after 3 seconds the system returns to the SAMPLING mode: