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RE: Displays Again....

From: "Tony Havelka" <>
Date: Thu, 10 Sep 1998 10:46:46 -0500

> has the M1 been tested for shock,moisture, an other
> abuses a user
> will more than likely put the unit through?  I'm curious as a
> friend asked
> a simple question, "what happens when you get cought in the rain?" My
> wearable is "rainproof" due to rubber sheeting sewn in the
> waist pack but I
> wonder what the M1 could handle.

The M1 has three essential components that should be looked at:  Belt pack,
ear piece, and eyepiece.

Belt Pack:

Not sealed for liquid environments.  While the picture adjustment switches
are sealed with a 1/8" rubber membrane, the brightness and contrast dials
plus all of the input jacks are not. Placing the belt pack under a rain coat
or windbreaker solves this problem.

Ear Piece:

The ear piece would be classified as water resistant not water proof. While
it is tightly sealed, exposure to enough water/rain may cause leakage into
the ear piece.

Eye Piece:

The eye piece is sealed for dust and moisture.  Direct immersion of the eye
piece is not advisable.  One area you should look at is where the cable
meets the eye piece. While is sealed internally, water could pool and slowly
seep into any microcracks in the bonding. This scenario is quite unlikely
but should be mentioned as a warning.

Sealing considerations:

Products such as malleable acoustic sealant have been used with great
success.  Tape, such as electrical type tape, may work but will not provide
the required adhesion in "aquatic" environments.

Shock Testing:

The panel can handle shocks of 30gs in 3 axes.

Humidity:

The panel can be operated up to 85% R.H. Non condensing .

Temperature:

The panel can be operated at temperatures from -20C to +70C.

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