14
Calibration
From the work display (READY FOR MEASUREMENT) press and release the “C” Button until
CALIBRATION is displayed. Press the “B” Button to START the CALIBRATION. The instrument will
perform the zeroing process.
1. Apply air known to be free of methane gas
2. Press the “B” button “OK” to accept
3. “SAMPLING CLEAN AIR” will be displayed with information showing the outputs for methane
(M) and light level (L) sensors. A stable reading must occur before the process automatically
continues.
4. A cell containing methane is introduced to the light path internally as displayed by “METHANE
CELL-IN”. Also displayed is information showing the outputs for methane (M) and light level (L)
sensors. A stable reading must occur before the process automatically continues.
5. If the reading is not stable the zeroing process will automatically re-initiate indicated by a
“RE-ZEROING” message. This process requires and addition 120-180 seconds as indicated
by a countdown timer.
6. A stable reading is indicated by a displayed message “CALIBRATING”,
PLEASE APPLY 100 PPM ETHANE, 30 SECONDS.
7. Attach the calibration gas of 100ppm ethane/balance nitrogen
8. Press the B button to start the measurement
9. If passed the result will display. Press the A button to return to the USER MENU.
10. If Failed, press the A button to exit to USER MENU or press the C button to RETRY beginning
with the zeroing process.
11. Calibration results are logged for later viewing and/or download.
12. Several failed calibrations indicate service or repair may be necessary.
Contact Sensit Technologies for assistance.
