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POWER SUPPLY
The unit is powered by either 4 AA Alkaline Batteries
or an optional AC adapter (9V/1A output).
Battery Installation
1. Install the batteries into the battery compartment located
at the bottom-rear of the unit by pressing downward on
the battery compartment door’s locking-hinge and
remove the cover.
2. Install 4 AA Alkaline Batteries ensuring the polarity is
correct and the batteries are firmly seated.
3. Re-install the cover and ensure it snaps securely into
place.
Note…
When the AC Adapter is used, power supplied from the
batteries is disabled. The adapter does not charge the
batteries.
When the battery voltage is low, ,
Lob
appears on LCD
and an alarm sounds. Under low battery conditions, the
meter’s CO
2
sensor will not function properly, readings are
not displayed, and an audible beep indicates a failed CO
2
measurement (press any key except the
SET
key to disable
the audible beeps). Replace the batteries or connect the
meter to the AC adapter.
