Analytical Industries GPR-1200 ATEX Portable Trace PPM Oxygen Analyzer - Manual (Page 22)

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MAIN MENU
AUTO SAMPLE
MANUAL SAMPLE
CALIBRATION
>>>
CALIBRATION
SPAN CALIBRATE
ZERO CALIBRATE
DEFAULT SPAN
DEFAULT ZERO
OUTPUT SPAN
OUTPUT ZERO
17. Press the ENTER key to select the SPAN CALIBRATE option.
18. Note: A span gas concentration above 1000 ppm dictates the selection of the PERCENT option.
19. Advance the reverse shade cursor using the ARROW keys to highlight the desired GAS CONCENTRATION.
20. Press the ENTER key to select the highlighted menu option.
GAS CONCENTRATION
PERCENT
PPM
21. The following displays appear:
000.00 PPM
PRESS UP OR DOWN
TO CHANGE VALUE
ENTER TO SAVE
MENU TO RETURN
>>>
080.00 PPM
SPAN
CALIBRATION
ENTER TO CALIBRATE
MENU TO ABORT
22. Press the ENTER key to advance the underline cursor right or press the MENU key to advance the underline cursor left to
reach to the desired digit of the alarm value.
23. Press the ARROW keys to enter the alarm value.
24. Repeat until the complete SPAN value has been entered.
25. Save the adjustment value by pressing the ENTER key or abort by pressing the MENU key.
26. 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
27. If the calibration is successful, the analyzer returns to the SAMPLING mode after 30 seconds.
28. If the calibration is unsuccessful, return to the SAMPLING mode with span gas flowing through the analyzer, make sure the
reading stabilizes and repeat the calibration before concluding the equipment is defective.
29. Before disconnecting the span gas line, place the SAMPLE/BYPASS valve in the BYPASS position.