Heath Consultants Optical Methane Detector (OM) - Manual (Page 36)

36
PROBLEM SOLUTION
Display is blank: Press and hold contrast
down button for approx.
15 seconds or until
writing appears on screen.
If display is still blank,
repeat with contrast up
button. If screen is still
blank call The Heath
Customer Service Depart-
ment.
Audible alarm not sounding: Press and hold speaker
for 15 seconds. Lower
the alarm set point until
it’s approx. two PPM
above PRESENT. Press
CALIBRATION TEST
button to test alarm. If
audible alarm still doesn’t
work, call The Heath
Customer Service Depart
ment.
T
ROUBLESHOOTING