User's Manual

WM, WM/E01, WM/E02, WM/X
LECTROSONICS, INC.
18
Preventing Corrosion
Whenever the transmitter has been exposed to mois-
ture or perspiration, follow the instructions below to
minimize the risk of corrosion.
DRY THE UNIT BEFORE REMOVING THE
MICROPHONE CONNECTOR OR BATTERY
CAPS.
If the transmitter has been exposed to salt water,
rinse it with fresh water and then dry the exterior of
the transmitter thoroughly with a clean paper towel or
cloth. Remove all moisture around the battery caps
and microphone cable connector.
After removing the battery caps and microphone con-
nector, wipe off any residual moisture around the bat-
tery compartment and microphone jack openings and
on the battery caps and microphone connector.
The O-rings should be coated with Vaseline
®
or an
equivalent petroleum jelly* before each use to ensure
the seals are watertight.
DO NOT USE ANYTHING OTHER THAN
PURE PETROLEUM JELLY TO LUBRICATE
THE O-RINGS. Silicon-based lubricants will
dissolve the O-rings.
Store the unit with no batteries installed, battery caps
removed and the microphone disconnected to allow
any buildup of humidity and moisture to evaporate.
Also see the section in the back of this manual entitled
Desiccant Battery Caps.
Desiccant Battery Caps
Early WM transmitters were shipped with standard
battery caps. Later engineering developed an updated
battery cap design that contained moisture absorbing
desiccant beads to protect the interior of the transmit-
ter from excess humidity. These caps are available as
a kit to update early WM transmitters, or to replace lost
or damaged caps.
Beads are stored
inside the cap to
absorb moisture
through the vent
holes.
Beads are amber/orange
in color when able to
absorb moisture.
These battery doors on the WM will absorb small
amounts of moisture and humidity from the inside of
the transmitter. You must still be careful to keep mois-
ture out of the WM by opening it only in dry or shel-
tered areas and by making sure the battery surfaces
are dry before installing them. Always use the WP wa-
terproof mic connector in wet conditions. The desiccant
doors will only remove a few drops of moisture.
Battery Door Update
Early WM transimitters were supplied with standard
battery door caps. The newer battery caps include a
drying agent in a cavity to help absorb moisture inside
the transmitter. The caps are available in a kit for up-
dating older transmitters.
Kit consists of pre-assembled battery doors
with thumbscrew and hex key (Allen wrench)
Remove old center screw with the supplied hex key
(Allen wrench).
Install new battery caps and tighten the thumb screw
by hand. The thumbscrew is removed to recondition
(dry out) the desiccant beads.
Eventually, the desiccant beads absorb enough mois-
ture that they will become ineffective and turn green
or blue instead of the normally dry color of amber/
orange. To recharge the desiccant, it must be heated
to 200 to 400 degrees F for at least an hour, preferably
more. The desiccant, the silicone O-ring seals and the
doors can withstand maximum temperatures up to 400
degrees F (205 degrees C).
The doors can be put into an oven at 200 degrees F
for several hours. As the heat drives out the absorbed
moisture, the desiccant will turn back to its normal
amber/orange color.
Do not put the WM transmitter itself into any
oven or heating device.
After heating, particularly at higher temperatures, the
O-rings will likely need a tiny dab of petroleum jelly
(Vaseline*) to replace the lubricant that may migrate in
the heat.
*Vaseline is a registered trademark of Conopco, Inc.