Calibration Handbook
112 Searchpoint Optima Plus
Span Gas
50 % LEL
Specify gas concentration value. Defaults are 50% LEL: for 2.5% methane or 50% UEG: for 2.2% methane.
Use ST to change displayed gas value in 1% steps to gas concentration used.
23. Press
; display shows
Press Enter when
Stable: XX.X
Fit gassing cover over weather protection of unit then apply span gas at one liter/minute and wait for
reading to stabilize approximately 30 sec to 1 min.
24. When gas reading stabilizes, press
; display shows
Processing Data
Please Wait . . .
25. If successful, after 10 seconds display shows
Span Calibrated
26. Wait for process to complete and display shows
Remove Gas, Press
Enter: XX.X
27. Remove gassing cover from weather protection. Ensure reading has returned to 00.0% LEL then press
; display shows
Press Enter to
Release 4-20
Releases analog output from 2mA (inhibit signal) to normal operation (4mA)
28. Press and hold
; for 3 sec, display shows
4-20 Released
Analog output is returned to normal operation
29. Aftrer the 4-20 inhibit is released, wait and display returns to Calibrate Menu. Press ESC twice to return
to Main Menu.
30. Turn off Handheld Interrogator by pressing ESC and
together.
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