Heath Consultants Optical Methane Detector (OM) - Manual (Page 25)

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ALARM SETPOINT:
The audible alarm allows the driver to only respond to signifi-
cant events, rather than requiring constant observation of the
methane level. The ALARM SETPOINT may be adjusted to
the required level greater than the normal background level.
Changes in the background level may require changes in the
ALARM SETPOINT. The background level may be a value more
or less than zero. If the background level changes significantly
(more than 4 PPM), contact Heath for further instructions. The
ALARM SETPOINT is adjustable from -10 to +40 PPM in 2-
PPM increments, with the value preset to 30 PPM when the system
is first turned on.
CAUTION:
IT IS NOT RECOMMENDED THAT YOU ALLOW
THE ALARM TO BEEP CONTINUOUSLY FOR AN
EXTENDED PERIOD OF TIME. THIS COULD
CAUSE PREMATURE FAILURE OF THE ALARM
BUZZER. THIS IS COMMON WHEN YOU GET
OUT OF THE VEHICLE TO VERIFY A LEAK.
YOUR VEHICLE COULD BE PARKED CLOSE
ENOUGH TO THE LEAK THAT THE OMD
TM BE-
GINS TO PICK UP THE LEAK AND START
ALARMING WHILE THE OMD IS UN-AT-
TENDED. WHENEVER YOU LEAVE THE VE-
HICLE, PRESS THE DISPLAY FUNCTION BUT-
TON TO REMOVE THE DISPLAY FROM SAMPLE
MODE TO PREVENT CONTINUOUS ALARMING.
O
PERATING
P
ROCEDURES