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

[ABLE1 <somewhere@xxxxxxxxxxx>]

On 12/18/2020 10:31 AM, alar...@xxxxxxx wrote:
> On Thursday, December 17, 2020 at 8:59:19 PM UTC-5, ABLE1 wrote:
>> On 12/17/2020 5:20 PM, alar...@xxxxxxx wrote:
>>> On Monday, December 14, 2020 at 9:59:24 PM UTC-5, 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
>>> Hi Les,
>>>
>>> I've used this in the past
>>>
>>> https://www.grainger.com/product/4YPK3?gclid=CjwKCAiAoOz-BRBdEiwAyuvA6_dCmiZvE0i97xN2mxwzV_ASkF4RuFemFi-1zxMX8HtNMXSC23HoeBoChm4QAvD_BwE&cm_mmc=PPC:+Google+PLA&ef_id=CjwKCAiAoOz-BRBdEiwAyuvA6_dCmiZvE0i97xN2mxwzV_ASkF4RuFemFi-1zxMX8HtNMXSC23HoeBoChm4QAvD_BwE:G:s&s_kwcid=AL!2966!3!281698275738!!!g!470307065699!&gucid=N:N:PS:Paid:GGL:CSM-2295:4P7A1P:20501231
>>>
>>> Granted it was a long time ago, but I never had to go back and change the keypad so it worked Ok.
>>> Viking Telecom Solutions has an option on their outdoor products to weather proof them but I don't know if they have a keypad or not. Besides I think they all they do is just dip their PCB's in some kind of gook and charge you another $100.00
>>>
>>> I'm thinking that just dipping (or painting) the PCB in some polyurethane would do the same thing and last at least 5 or ten years.
>>>
>> Hey Jim,
>>
>> Now that is some serious STUFF!!
>> Never heard of that before.
>>
>> I will have to source that at my local distributor.
>> Grainger closed their local store a few years ago. I liked
>> going there to pickup a specific thing or two. Always good
>> to walk the isles to get ideas.
>>
>> Thanks for the tip. Much appreciated.
>>
>> Les
> Just Google CRC Urethane Seal Coat and I'm sure you can find it and other brands of PCB seal coatings on line.
>

My local distributor carries CRC products.  I just need to call and find
if in stock or needs to order.   Easy to do either way.