Analytical Industries GPR-1200 MS ATEX Portable PPB Oxygen Analyzer - Manual (Page 21)

21
000.00 PPM
PRESS UP OR DOWN
TO CHANGE VALUE
SELECT TO SAVE
ESC TO RETURN
>>>
80.00 PPM
SPAN
CALIBRATION
ENTER TO CALIBRATE
ESCAPE TO ABORT
24. Press the ARROW keys to enter the first digit of the span value.
25. Press the ENTER key to advance the underline cursor right or press the MENU key to advance the underline
cursor left to change the next digit of the span value.
26. Repeat steps 20 and 21 until the complete span value has been entered.
27. Press ENTER to save the span value and proceed to the display on the right.
28. Press ENTER to begin the calibration function.
Both the Zero Calibrate and Span Calibrate functions result in the following displays:
PASSED
CALIBRATION
OR
FAILED
CALIBRATION
29. Should the “FAILED CALIBRATION” display appear, consult section 8 Troubleshooting and repeat the process
before concluding the analyzer or sensor is defective, or contact the factory.
30. The analyzer returns to the AUTO SAMPLING mode after 30 seconds.
31. Before disconnecting the span gas line and connecting the sample gas line, place the 3-way valve in the
BYPASS position.
32. Disconnect the span gas line and replace it with the sample gas line.
33. Adjust the analyzer’s FLOW control valve until the FLOW INDICATOR reads 2 SCFH, as above.
34. Allow the sample gas to flow for 1-2 minutes to purge the air trapped in the sample gas line.
35. Place the 3-way valve in the SAMPLE position
36. Wait 10 minutes to ensure the reading is stable and proceed to SAMPLING.
Sampling
The benefits of the bypass sample system featured below:
1. Manufacturer supplies the analyzer with the sensor it was qualified with.
2. Isolate the sensor during transport and maintenance intervals and extend sensor life.
3. Isolate the sensor from exposure to high oxygen levels during upset conditions and extend sensor life.
4. Purge the high oxygen levels or air trapped in the sample system following a process upset, changing sample
gas lines or connecting span gas lines.
5. Complimenting the recovery capability of the sensor to increase operator productivity.