
16
CALIBRATION
STEP 1:
Prepare 50%LEL or 10% LEL Methane/Air, or 50%LEL
Propane/Air, depending on what calibration point the unit calls for, and
proper regulator and adapter. Press and hold the ZERO (C) button to
reset fresh air zero (indicated by “Zro” on the display)
STEP 2:
Press and hold the TICK/CAL button (B) for 6 seconds until
“CH4” or “PRO” is displayed.
STEP 3:
Attach the adapter to the sensor cap assembly.
STEP 4:
Press the TICK/CAL button (B) and the cal icon will flash
and numbers will change on the display. Upon completion, the working
display will appear with the gas reading.
A reading of “bAd” indicates unsuccessful calibration. Repeat process if
“bAd” appears. Press the POWER/MUTE button (A) to clear the “bAd”
display reading and go to the working display.
Continued unsuccessful calibrations may indicate faulty sensor. Any
instrument that will not calibrate or continues to indicate “bAd” on
the display, should be taken out of service. Please contact Sensit
Technologies for further assistance.