Re: RF Immunity in Smoke Detectors

["Petem" <petem001@xxxxxxxxx>]

As an Ham radio operator and an alarm technician I have seen this occurred
many time

in the time of the 1500 and such line of dsc, putting a capacitor (10 uF)
across the zone lead at the detector(in parallel of the end of line
resistor) would cure the trouble...

now I don't know what of panel you have but this could do the trick...

one other time the capacitor trick could not work so we coiled the wiring on
a ferrite toroid...

hope this help


"Eyeball Kid" <jimbo1@xxxxxxx> a écrit dans le message de news:
EwXXg.42$AU6.33@xxxxxxxxxxxxxxx
>I have a customer who is an amateur radio operator and is complaining that
>whenever he is transmitting he trips the smoke detector we installed
>(System Sensor 2012HA).  He is asking for a smoke that is better designed
>for RF Immunity.
>
> Almost all the motions I have seen have some spec listing RFI  (typicall
> 30v/m 10-1000Mhz)  but I have not found any such spec on any of the smokes
> I have looked at.  (System Sensor, GE-Interlogix, DSC)
>
> Anyone have any suggestions for a smoke detector in a RF rich environment?
>
> Anyone done an install at a radio station (the transmitter not the studio)
> and what did you use?
>