Analytical Industries GPR-2500 S Oxygen Analyzer - Manual (Page 27)

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Press the ENTER key to select the SPAN CALIBRATE option.
Note: A span gas concentration above 1000 ppm dictates the selection of the PERCENT option.
Advance the reverse shade cursor using the ARROW keys to highlight the desired GAS CONCENTRATION.
Press the ENTER key to select the highlighted menu option.
GAS CONCENTRATION
PERCENT
PPM
The following displays appear:
00.00 %
PRESS UP OR DOWN
TO CHANGE VALUE
SELECT TO SAVE
ESC TO RETURN
>>>
20.9 %
SPAN
CALIBRATION
ENTER TO CALIBRATE
MENU TO ABORT
Press the ENTER key to advance the underline cursor right to the second digit of the span value. Press the MENU
key to advance the underline cursor left to the previous digit.
Press the ARROW keys to enter the second digit of the span value.
Repeat steps 30 and 31 until the complete span value has been entered.
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.
Both the Zero Calibrate and Span Calibrate functions result in the following displays:
PASSED
CALIBRATION
OR
FAILED
CALIBRATION
If the calibration is successful, the monitor returns to the SAMPLING mode after 30 seconds.