Analytical Industries GPR-1535 GB Trace PPM Oxygen Transmitter - Manual (Page 19)

Advanced Instruments Inc.
19
MAIN MENU
AUTO SAMPLE
MANUAL SAMPLE
CALIBRATE
24.5 C 100 KPA
>>>
CALIBRATION
SPAN CALIBRATE
ZERO CALIBRATE
DEFAULT SPAN
DEFAULT ZERO
24.5 C 100 KPA
10. Assure there are no restrictions in vent line.
11. Regulate the pressure and control the flow rate as described above at 5-30 psig and a 2 SCFH flow rate.
12. Allow the span gas to flow for 1-2 minutes to purge the air trapped in the span gas line.
13. Disconnect the sample gas line and install the purged span gas line.
14. 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.
15. Press the ENTER key to select the SPAN CALIBRATE option.
16. Note: A span gas concentration above 1000 ppm dictates the selection of the PERCENT option.
17. Advance the reverse shade cursor using the ARROW keys to highlight the desired GAS CONCENTRATION.
18. Press the ENTER key to select the highlighted menu option.
GAS CONCENTRATION
PERCENT
PPM
19. The following displays appear:
000.00 PPM
PRESS UP OR DOWN
TO CHANGE VALUE
SELECT TO SAVE
ESC TO RETURN
>>>
80.00 PPM
SPAN
CALIBRATION
ENTER TO CALIBRATE
MENU TO ABORT
20. Press the UP/ DOWN ARROWS to enter the first digit of the span value.
21. 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.
22. Press the UP/ DOWN ARROWS to enter the second digit of the span value.
23. Repeat steps 21 and 22 until the complete span value has been entered.
24. 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 transmitter returns to the SAMPLING mode after 30 seconds.