Alarm Fault On A Veritas R8 Plus

[gym_rat]

I shall sort it one way or the other. The inductance point I mention, Texecom tell you not to install alarm cable next to power cable. You must know this, The cable has a magnetic field around it. (thats how these cable detectors work) If the alarm cables are next to power cable then it can pick up signals.

 

 

it needs a return path to earth, a plastic control unit doesn`t have one, if it did - IT STILL ISNT THE REASON FOR YOUR FAULT

 

 

 

clear enough.

 

 

 

did you disable chime? did you ever hear the noise yourself? what lights were on the panel?

[sixwheeledbeast]

So to be clear.

A metal panel is more likely to have ac noise on it?

 

Sorry but I agree with James here.

A metal panel should be less susceptible to Induced AC.

 

I have more trouble with plastic panels and induced then any metal cab.

I have found many Veritas 8 with >15Vac Induced whereas metal panels are a rarity.

 

The theory here is the metal acts like a shield from most electrical noise.

For example what would be the point of shielded cable if connecting it to mains earth was worse?

 

I don't see how earth bonding is relevant

Also there definitely shouldn't be any continuity between mains earth and the LV terminals on the PCB eithier.

[sjsturner]

Yes its EOL. All 8 zones in use, tamper linked out.

It looks like the guys going to allow me to fix it after all. What I intend to do. I need to find out what this fault is for the experience of knowing incase it ever happens aghain.

1. Power the panel up on an extention lead pluged in so its not on a lighting circuit.

2. Link out all the zones and remove the Aux 12V wires to the sensors.

3 If the fault disappears I will connect the zones up and leave it at default.

4. If the fault happens it has to be ither the programming or the alarm cabling.

5. At this point I only need to find out which one(s0 it is. Can't see any cable laid along power cables so that won't

be a problem

5. If no fault occurs then its the mains power supply spur.

I just hope its to do with the the spur. If not I'm F**ked again LOL

I'll find it one way ot the other, Some one might give me a medel Lol.

Ive had another new panel on test all week so its fine.

remember if you have set up for eol you need to link the zones with 10k

then wire or staple link across tamp terms

then sab connections 0v linked to sab tamp.

power panel up and let sit whilst you test your zone cables you should be seeing 10k unless the doors are open lol

add things a bit at a time.

i am assuming you have turned the eol options ON?

[james.wilson]

i dont think its a myth. I do think more is made of it than is needed. AC noise IMO is not an issue but changing levels of ac noise 'could' be.

data lines should be immune if the correct cable is used and id of thought most panels have enough filtering in the input stages to mitigate most of it on the circuit side. Inputs and outputs with little or non existant filtering are more likly to be affected though.

 

However the 'connecting your meter makes the circuit' did interest me for a while. But the voltage must be there to be measured. Its the same theory as how a transformer works.

I think the 'myth' imo is that it doesnt really cause an issue apart from in extreme and rare cases, but i do believe it exists and 'can' be a problem

[MrHappy]

I have found many Veritas 8 with >15Vac Induced whereas metal panels are a rarity.

I assume your aware that on metal control the 0v are tied to metal cabinet so you won't get a reading unless you remove the earth of the main block in the same way some plastic panel have a earth lead into the mains bloc

[Oxo]

Metal panels tie the tamper to the body, hence Ground and induced.

Plastic do not. But can have induced on the "lines".

 

As Mr H says on a metal, it is tied in.

But you will get a reading all the same.

 

Seems some here have not seen what a filter can do to a troublesome site.

And YES Gymmie, it does work, and exist

[gym_rat]

 I do think more is made of it than is needed. AC noise IMO is not an issue 

 

 it doesnt really cause an issue apart from in extreme and rare cases, but i do believe it exists and 'can' be a problem

 

thank you for the measured response - it`s rare enough for us to have never had a problem from it in 30 odd years, but we never fitted keypads that needed screened cable.

 

too many other ill`s are laid at the door of induced AC.

Metal panels tie the tamper to the body, hence Ground and induced.

Plastic do not. But can have induced on the "lines".

 

As Mr H says on a metal, it is tied in.

But you will get a reading all the same.

 

Seems some here have not seen what a filter can do to a troublesome site.

And YES Gymmie, it does work, and exist

 

 

and what problems does it cause?

[james.wilson]

too many other ill`s are laid at the door of induced AC.

Id agree with that

[Oxo]

thank you for the measured response - it`s rare enough for us to have never had a problem from it in 30 odd years, but we never fitted keypads that needed screened cable.

 

too many other ill`s are laid at the door of induced AC.

 

 

and what problems does it cause?

 

Data corrupted on RKP/EXP/RIO/LIM  although the Scanny`s were virtually immune.

PIR`s going off at a blink of an eye with no one in the room.

One particular one was ONLY solved with a makeshift cap arrangement I "bodged" then returned with a 1313.

 

Your good m8, but not seen it all.

 

(Edit my self)

 

I`m good, and also not seen it all. But acknowledge the fact.

[goncall]

Not had many with induced ac tho it does happen.seen it cause cv faults on galaxy.rfi is a bigger problem for false alarms .