Operation Manual

Maintenance
OTDR 79
Replacing Batteries
Replacing Batteries
As soon as you remove the battery compartment door, the unit will turn
itself off.
To replace main batteries:
1. Open the battery compartment door located
at the back of the unit.
2. Lift the mobile part of the battery lock and
turn it 90
o
clockwise.
The base of the battery lock will fit in the
groove between the two batteries.
3. Replace both batteries, respecting the polarity.
4. Lift the mobile part of the battery lock and turn it 90
o
counterclockwise
to secure the batteries in place.
For optimum reliability, put the battery lock back in place, as shown in
the figure above.
5. Close the battery compartment door; you cannot turn on the unit if the
battery door is open.
WARNING
Do not throw batteries into fire or water and do not short-circuit
the batteries’ electrical contact. Do not disassemble.
Battery
lock