Meriam M2 – Series Smart Manometer - Manual (Page 33)

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Changing the Batteries
ATEX certified models require the use of
approved batteries to maintain the ATEX
certification. Refer to Dwg. No. 9R000056 “M2 Intrinsically
Safe Control Document” for a list of batteries approved for
hazardous atmospheres. A copy of this drawing accompanies
each unit shipped.
Remove and / or replace batteries in non-
hazardous areas only. Also see the
Certification/Safety/Warnings section of this manual for
additional important information.
The manometer is powered by four, 1.5 volt AA size
batteries. When the output of the batteries under load
drops,
the display will alternate between “LOW POWER
DETECT” and “REPLACE BATTERY”. Low power may
affect performance. The unit should not be used to
measure pressure in this condition. All four batteries
should be replaced.
To replace the battery locate the battery compartment at
the bottom rear of the manometer, as shown here.
Remove the two screws on either side of the battery cover
by turning them counterclockwise until fully disengaged
from the manometer base. Lift the cover from the back of
the unit.
Remove the batteries by pulling the positive side first
straight out of the battery compartment. Note the positive
(+) and negative (-) battery polarity markings at the bottom
of the compartment, as shown here.