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

["alar...@xxxxxxx" <alarminex@xxxxxxx>]

On Thursday, December 17, 2020 at 8:59:19 PM UTC-5, ABLE1 wrote:
> On 12/17/2020 5:20 PM, alar...@xxxxxxx wrote:=20
> > On Monday, December 14, 2020 at 9:59:24 PM UTC-5, ABLE1 wrote:=20
> >> Hey guys!!=20
> >>=20
> >> I have serious question. I have a customer that has a=20
> >> door access keypad mounted on a single gang plastic box=20
> >> that it mounted on the side of a steel building next to=20
> >> the door. The keypad is a IEI 212W which is weather rated.=20
> >>=20
> >> The original keypad was installed 5+ years ago. Last week=20
> >> the customer reported that the code was not always working.=20
> >> It took a couple of tries on the keypad to get the code to=20
> >> energize the electric strike.=20
> >>=20
> >> When I got on site all looked good but I noticed that that=20
> >> not all keys were reliable. The decision was made to=20
> >> just replace the keypad. I ordered a new unit, same model,=20
> >> and installed two days later. Programmed and all was good.=20
> >>=20
> >> When removing the old keypad I noticed some rust on a few=20
> >> terminals. Upon further inspection back at my office=20
> >> I noticed some other areas on the circuit board that had=20
> >> some spots that may have been moisture related.=20
> >>=20
> >> First off this keypad was mounted with the supplied foam=20
> >> gasket and tight. The inside of the box was dry.=20
> >>=20
> >> The only opening to the box is where the wire penetrates=20
> >> the back from the inside wall cavity.=20
> >>=20
> >> The question is how did water get inside the box and on=20
> >> the keypad terminals and circuit board??=20
> >>=20
> >> I am thinking condensation. If I am right then how to=20
> >> fix the problem??=20
> >>=20
> >> This is where I stop typing and look to read possible=20
> >> solutions from the crowd.=20
> >>=20
> >> Oh and local temperatures range from 20F to 100F +/-=20
> >>=20
> >> Thanks for any thoughts!!=20
> >>=20
> >> Les=20
> > Hi Les,=20
> >=20
> > I've used this in the past=20
> >=20
> > https://www.grainger.com/product/4YPK3?gclid=3DCjwKCAiAoOz-BRBdEiwAyuvA=
6_dCmiZvE0i97xN2mxwzV_ASkF4RuFemFi-1zxMX8HtNMXSC23HoeBoChm4QAvD_BwE&cm_mmc=
=3DPPC:+Google+PLA&ef_id=3DCjwKCAiAoOz-BRBdEiwAyuvA6_dCmiZvE0i97xN2mxwzV_AS=
kF4RuFemFi-1zxMX8HtNMXSC23HoeBoChm4QAvD_BwE:G:s&s_kwcid=3DAL!2966!3!2816982=
75738!!!g!470307065699!&gucid=3DN:N:PS:Paid:GGL:CSM-2295:4P7A1P:20501231=20
> >=20
> > Granted it was a long time ago, but I never had to go back and change t=
he keypad so it worked Ok.=20
> > Viking Telecom Solutions has an option on their outdoor products to wea=
ther proof them but I don't know if they have a keypad or not. Besides I th=
ink they all they do is just dip their PCB's in some kind of gook and charg=
e you another $100.00=20
> >=20
> > I'm thinking that just dipping (or painting) the PCB in some polyuretha=
ne would do the same thing and last at least 5 or ten years.=20
> >
> Hey Jim,=20
>=20
> Now that is some serious STUFF!!=20
> Never heard of that before.=20
>=20
> I will have to source that at my local distributor.=20
> Grainger closed their local store a few years ago. I liked=20
> going there to pickup a specific thing or two. Always good=20
> to walk the isles to get ideas.=20
>=20
> Thanks for the tip. Much appreciated.=20
>=20
> Les
Just Google CRC Urethane Seal Coat and I'm sure you can find it and other b=
rands of PCB seal coatings on line.