[600MRG] (Fwd) Smoke Alarms

[Kenneth G. Gordon]

Here is the most recent correspondence I have received on the issue of SAI 
(Smoke Alarm Interference).

Perhaps this will help?

Ken W7EKB
------- Forwarded message follows -------
To:	<kgordon2006 at frontier.com>
Subject:	Smoke Alarms
Date sent:	Tue, 21 Oct 2014 11:39:01 -0500


    Ken,
     
    Not sure if it applies to your situation, but I had my security system (wired) smoke 
    detectors replaced.  First, all smoke detectors have a finite lifetime.  On the detectors 
    marketed today, the life cycle is even programmed into the battery type units (they give off 
    an audible alarm that you initially take as a low battery warning).  On the security system 
    units, I was having false trips due to their age which was why I was having them replaced.  
    So age might make the detectors more susceptible to RFI.
     
Secondly, when my new units were installed they were not terminated properly which was 
allowing the RFI.  Once we terminated the line properly, the RFI ceased.  I have three 
detectors on the same line to the security system which would be the normal installation 
configuration.  So I am suggesting that the termination of the smoke detector(s) 
connection circuit be checked if applicable.

------- End of forwarded message -------