Omega Engineering OM88128 - Manual (Page 9)

BATTERY REPLACEMENT
The dataloggers are designed with a waterproof housing, and allow
the user to replace battery when it has expired .You will see "Lo"
appeared on the display when battery is weak for model OM8828 and
OM8829..
Follow the steps to remove and replace battery:
1. Unscrew the datalogger from the rear side .
2. Do not remove o-ring but make sure the o-ring is in its place
(groove).
3. Remove the expired battery
4. Insert a new battery CR3 or ER2, make sure the battery is
inserted with correct polarity.
5. Re-screw the rear cover with screwdriver .
+CR2/ER3-
+CR2/ER3-
6
Model:
OM8818
Model:
OM88128
OM8828
OM8829