DSC DW4975 Vanishing Contact

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Has anyone had issues with the DSC (Secure Wireless) EV-DW4975 Vanishing Co
ntact?

I haven't used many of them, as I prefer the standard contacts and the abil
ity to install with screws, but I have one system (a 1616) with four of the
se contacts that has been a pain lately.  After being installed for about 4
.5 years (right on time), one of the contacts has a low battery.  However,  
replacing the battery doesn't clear the trouble.  Nor does it help to open  
and close the door to help force a signal through, which is what always wor
ks on the standard contacts.

On the other hand... The battery voltage is good, and this is the second ne
w battery we've tried.  The contact is sending tamper and tamper restoral s
ignals as it should.  And the zone shows open and closed as it should.

My next thought is to ship them a new contact... unless anyone has any bett
er ideas?

- Chris

Re: DSC DW4975 Vanishing Contact
On Thursday, March 12, 2015 at 8:20:12 PM UTC-4, Chris wrote:
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Contact?
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ility to install with screws, but I have one system (a 1616) with four of t
hese contacts that has been a pain lately.  After being installed for about
 4.5 years (right on time), one of the contacts has a low battery.  However
, replacing the battery doesn't clear the trouble.  Nor does it help to ope
n and close the door to help force a signal through, which is what always w
orks on the standard contacts.
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new battery we've tried.  The contact is sending tamper and tamper restoral
 signals as it should.  And the zone shows open and closed as it should.
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tter ideas?
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One of the old tricks I used to use on the old Ademco transmitters was any  
time a transmitter needed a battery changed .... before installing the new  
battery I would short out the battery terminals on the transmitter. Seems t
here was a capacitor that retained a charge which didn't let the low batter
y indicator circuit discharge. Just short the two battery terminals with a  
screwdriver or something metal for a few seconds then install the new batte
ry.  

Don't know if it will work but it's worth a try.  

Get back and let us know what happened.  

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