Klein Tools CL210 Manuel D'instructions page 12

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Battery replaceMent
When indicator is displayed on LCD, batteries must be replaced.
1. Remove screw from battery door.
2. Replace 3 x AAA batteries (note proper polarity).
3. Replace battery door and fasten securely with screw.
to avoid risk of electric shock, disconnect leads from any voltage
source before removing battery door.
to avoid risk of electric shock, do not operate meter while
battery door is removed.
12
Maintenance