DOCTER DOCTER®sight III - Manual (Page 13)

Let a gunsmith do the DOCTERsight III mounting and the shooting adjustment
of the gun. Put on the cap not before the mounting has been completed.
Putting into Operation
For the power supply, one CR 2032 lithium battery (3 V) is needed. Any other kind of
power supply is excluded.
Insert the battery into the battery compartment at the bottom of the enclosure such
that the labeling of the battery with the marking of the plus pole is visible. A danger to
damage the electronics due to an incorrect insertion does not exist. For a better
contact, a magnet causes the battery to be pulled toward the gold-plated contact
plate on the circuit board. The contact area is to be kept clean (cleaning using spirit).
Replacing the battery
To replace the battery, the DOCTERsight is to be removed from the mounting plate.
The battery compartment is located at the bottom of the device. The exhausted
battery is taken out by putting the wrench key (or the screwdriver) onto the notch
located at the right bottom side. When the battery has been replaced, the sight is put
back onto the mounting plate and is fastened with the 2 countersunk screws. Due to
the precision positioning pins, a new shooting adjustment is not required.
Switching on/off
A mechanical on/off switch is not present. To switch off the electronics, the
programming cap is put on. The putting-on effects a switching-off of the electronics.
When the programming cap shall be taken off, put the thumb onto the grooved area
of the cap and, at that, slightly press down. Now, push the cap forward such that it
lifts off from the device.