Re: LOL A Real On Topic Question!! Imagine that!!

[RTS <gafa@xxxxxxxxxxxxx>]

On 12/14/2020 8:59 PM, ABLE1 wrote:
> Hey guys!!
>
> I have serious question.  I have a customer that has a
> door access keypad mounted on a single gang plastic box
> that it mounted on the side of a steel building next to
> the door.  The keypad is a IEI 212W which is weather rated.
>
> The original keypad was installed 5+ years ago.  Last week
> the customer reported that the code was not always working.
> It took a couple of tries on the keypad to get the code to
> energize the electric strike.
>
> When I got on site all looked good but I noticed that that
> not all keys were reliable.  The decision was made to
> just replace the keypad.  I ordered a new unit, same model,
> and installed two days later.  Programmed and all was good.
>
> When removing the old keypad I noticed some rust on a few
> terminals.  Upon further inspection back at my office
> I noticed some other areas on the circuit board that had
> some spots that may have been moisture related.
>
> First off this keypad was mounted with the supplied foam
> gasket and tight.  The inside of the box was dry.
>
> The only opening to the box is where the wire penetrates
> the back from the inside wall cavity.
>
> The question is how did water get inside the box and on
> the keypad terminals and circuit board??
>
> I am thinking condensation.  If I am right then how to
> fix the problem??
>
> This is where I stop typing and look to read possible
> solutions from the crowd.
>
> Oh and local temperatures range from 20F to 100F +/-
>
> Thanks for any thoughts!!
>
> Les
>
>
>

   think your right about the condensation,  have had that problem
many times around here..
seal the wire hole as best you can to avoid the inside/outside
air mixing..
Then my favorite trick is place a few of those desiccant packages
in the cavity..
In really damp places I've done the ole Blue Grass Electronic
trick and cover the electronic board with candle wax..

--

*Rocky T. Squirrel, esq.*