Re: Opinions

["Paul" <someones-father-@xxxxxxxxxxx>]

Thanks guys, interesting input.

Paul

"HoneywellTech" <seccon1@xxxxxxxxxxx> wrote in message
news:SzUze.10996$zA.10610@xxxxxxxxxxx
> Paul,
>
> There is nothing wrong with the thurough circuit test that you are doing
> based on resistance. I think the best response was given by Marc or
> someone
> who mentioned that Radionics Tech supt asked about voltages on the loop.
>
> If you call and say the panel shows a violated loop and say you have
> checked
> the circuit and its good. A voltage reading accross the circuit is a quick
> way to double check. (Without meaning to offend, the average tech doesn't
> know what the voltage is suppose to read so he can't guess or even lie,)
> now
> he gives the voltage. Since he was not holding the leads and the wire, his
> body resistance is not a factor.
>
> Example. Take your favorite panel, with the EOL accross the zone, read the
> voltage, open the circuit by lifting one leg of the EOL now the voltage
> rises. Short the circuit and the Voltage falls to approx 0v.
> Armed with this you can also see when the voltage rises above the value
> shown with just the EOL then the loop resistance is above the value of the
> EOL.
>
> The magic stops when the Panel is broke and No voltage comes out of the
> circuit terminals, Now you have to open at least one side of the circuit
> so
> that you can eliminate the load as the possible cause.
>
> But the beauty still is that you identified the status of the loop without
> eliminating the circuit entirely from the control.
>
> This does nothing to troubleshoot the suspect component, i.e. motion.
> glassbreak etc.
>
> decide for yourselves, nice chatting with you guys
>
> "Paul" <someones-father-@xxxxxxxxxxx> wrote in message
> news:DjQze.29121$oJ.14895@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>> Another question then. If you read the voltage across a zone at the
>> panel,
>> without disconnecting it from the panel, and there is a fault on another
>> zone, does it effect the voltages on the rest of the panel. And will this
>> lead to a false result. Thats why I disconnect and test the resistance.
>> At
>> least you know that there is nothing else that is going to influence the
>> results (unless there is some sort of earth loop I suppose)
>>
>> Paul
>>
>> "HoneywellTech" <seccon1@xxxxxxxxxxx> wrote in message
>> news:Mmlze.6313$x82.5971@xxxxxxxxxxx
>> > Exactly Paul,
>> >
>> > Since resistance drops voltage (from the control panel zone) the
>> > reading
>> > is
>> > equally reliable as pulling the loop and using a resistance check but
> the
>> > "Benefit" is that the tech does not have to remove the loop.
>> >
>> > When providing tech support in the past, it has amazed me that many
>> > long
>> > time Pros don't know that there is a voltage drop accross a Class B
>> > circuit.
>> >
>> > They must think that the panel sends water through there.
>> > ;^)
>> > "Paul" <someones-father-@xxxxxxxxxxx> wrote in message
>> > news:GJ4ze.17038$oJ.2732@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>> >> Thats was my reasoning as well. Ive had a few techs say that its
>> >> better
>> >> to
>> >> test the voltage while the zone is connected to the panel. My argument
>> >> was
>> >> also that as relating to Ohms law, resistance, voltage and current are
>> >> all
>> >> related and if one changes then there are changes elsewere. Ive been
>> >> servicing and fault finding for years using the testing of the circuit
>> >> and
>> >> checking the resistance method with great results, but im always
> willing
>> > to
>> >> listen to better methods.
>> >>
>> >> Paul
>> >>
>> >>
>> >> "Jackcsg" <nospam@xxxxxxxxxx> wrote in message
>> >> news:xNOdncvjB-RCuVHfRVn-gw@xxxxxxxxxxxxxxx
>> >> > Panels don't see resistance. They see voltage. The difference in
>> >> > resistance
>> >> > is what changes the value of the voltage, or simply put, the
> tolerances
>> >> > between the two determine the status of the loop (as the panel sees
>> >> > it -open/closed/short). There is no benefit, just another means of
>> > testing
>> >> > a
>> >> > circuit. Where it would make a difference is if you were hunting for
> a
>> >> > ground fault on a circuit.
>> >> >
>> >> > Jack
>> >> >
>> >> > "Paul" <someones-father-@xxxxxxxxxxx> wrote in message
>> >> > news:LJPye.16372$oJ.10172@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>> >> >> What would be the benefit of testing the voltage across a zone of a
>> > panel
>> >> > to
>> >> >> ascertain whether or not the device is faulty, over testing the
>> >> >> resistance
>> >> >> of the circuit?
>> >> >>
>> >> >> Just curious.
>> >> >>
>> >> >> Paul
>> >> >>
>> >> >>
>> >> >
>> >> >
>> >>
>> >>
>> >
>> >
>>
>>
>
>