Analytical Industries GPR-1000 ATEX Portable Trace PPM Oxygen Analyzer - Manual (Page 20)

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5. Assure there are no restrictions in the span gas line.
6. Assure the male fitting designated for the vent is installed and the vent is open.
7. Regulate the pressure and control the flow rate as described above, 5-30 psig and 2 SCFH flow rate.
8. Allow the span gas to flow for 1-2 minutes to purge the air trapped in the span gas line.
9. Disconnect the sample gas line and install the purged span gas line.
10. Caution: Allow the span gas to flow and wait until the reading is stable before proceeding with
calibration. The wait time will vary depending on the amount oxygen introduced to the sensor when the gas
lines were switched.
11. Access the MAIN MENU by pressing the MENU key.
12. Advance the reverse shade cursor to highlight SPAN CALIBRATE.
13. Press the ENTER key to select the highlighted menu option.
14. Note: A span gas concentration above 1000 ppm dictates the selection of the PERCENT option.
15. Advance the reverse shade cursor to highlight desired GAS CONCENTRATION.
16. Press the ENTER key to select the highlighted menu option.
MAIN MENU
AUTO SAMPLE
MANUAL SAMPLE
SPAN CALIBRATE
ZERO CALIBRATE
DEFAULT SPAN
DEFAULT ZERO
>>>
GAS CONCENTRATION
PERCENT
PPM
17. The following displays appear:
000.00 PPM
PRESS UP OR DOWN
TO CHANGE VALUE
PRESS ENTER TO SAVE
PRESS MENU TO RETURN
>>>
80.00 PPM
SPAN
CALIBRATION
ENTER TO CALIBRATE
MENU TO ABORT
18. Press the UP/ DOWN ARROWS to enter the first digit of the span value.
19. Press the ENTER key to advance the underline cursor right or press MENU key to advance the underline cursor
left to change the next digit of the span value.
20. Repeat steps 18 and 19 until the complete span value has been entered.