Fisher Labs CZ-21 QuickSilver Operating Manual page 36

BATTERY REPLACEMENT
Follow these instructions carefully to avoid getting water in the
battery compartment.
1. Tuck in the wires. Do not pinch them in the seal when closing.
2. The battery door will capture the battery holder and self-center
it as you install the door.
3. Tighten the knobs SECURELY.
a. Use a coin.
b. Tighten by hand FIRMLY.
Use maximum MANUAL force.
c. Do Not use a tool.
d. Do Not use a screwdriver.
Torque Specification is 8 in-pounds.
4. If you have removed the gasket, see page
36 for installation instructions.
An improperly installed gasket = a water leak!
5. Submerge the detector in water for 1/2 hour.
a. Remove from water.
b. Dry off the detector
c. Remove the battery door
d. Verify that no water has entered.
This step is necessary to insure that you are applying
enough force to the screws.
6. If you cannot tighten the screws securely by
hand, then use a screwdriver.
a. Tighten the screw a maximum
additional rotation of 15° beyond the
hand-tightened position.
7. Lithium grease is installed between the
contact surfaces of the thumb-screw and
insert in the case.
a. Do not wipe off the grease.
b. With usage, the grease may wear off.
c. Without grease, the thumb-screw may seize up after
tightening. If this happens, reapply a small amount of
lithium grease between the contact surfaces.
34
VERY IMPORTANT
15°