Analytical Industries GPR-1800 IS ATEX Trace PPM Oxygen Transmitter - Manual (Page 31)

Advanced Instruments, Inc
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Disconnect the span gas line and replace it with the sample gas line.
Default Span
With factory default span, previous calibration data stored in the memory is removed and the sensitivity of
the analyzer is reset to the value based on the average output of the oxygen sensor at a specific oxygen
concentration. For example, with factory default settings, when a span gas is introduced, the micro-
processor will display oxygen reading within 30-50% of the span gas value, indicating that the sensor output
is within the specified limits. This feature allows the user to check the sensor’s signal output without
removing it from the sensor housing.
Access the MAIN MENU by pressing the MENU key.
Advance the reverse shade cursor using the ARROW keys to highlight CALIBRATION.
Press the ENTER key to select the highlighted menu option.
The following displays appears:
MAIN MENU
AUTO SAMPLE
MANUAL SAMPLE
CALIBRATION
CONFIG ALARMS
BYPASS ALARMS
>>>
CALIBRATION
SPAN CALIBRATE
ZERO CALIBRATE
DEFAULT SPAN
DEFAULT ZERO
OUTPUT SPAN
OUTPUT ZERO
Advance the reverse shade cursor using the ARROW keys to highlight DEFAULT SPAN.
Press the ENTER key to select the highlighted menu option.
The following displays appear and after 3 seconds the system returns to the SAMPLING mode:
FACTORY
DEFAULTS
SET
3.1 PPM
AUTO SAMPLING
10 PPM Range
76 F 100 KPA
4-20 mA Output Adjustment
In rare instances the 4-20mA signal output may not agree to the reading displayed by the LCD. This feature
enables the user to adjust the 20mA signal output should the LCD display not agree.
Note: Adjust the 4mA signal output with the OUTPUT ZERO option described above.
Access the MAIN MENU by pressing the MENU key.
Advance the reverse shade cursor using the ARROW keys to highlight CALIBRATION.
Press the ENTER key to select the highlighted menu option.
The following displays appear: