Low res showing on zones tested voltage on pirs zones appears correct 0.872v zone number 1003 1008 1013

replaced resistors eol 1k ,when system is unset it appears 3 faults low res nothing else system arms without problem called monitoring company they said unaware of faults the system was installed by myself as a foreigner for a pals pub ??? 

 

 

0.8v where?

 

Cable fault? Do they share a cable?

Going directly to panel zones 1pir each zone at the panel 

Single cables no cable fault 

 

What's the resistance with respect to 0v on the zone wire with the zone wire removed from the panel screw terminal?  With the zone wire removed from the terminal does it show any voltage (DC or AC) on the wire when measured against 0v?

 

Next step is to swap zones and see if the problem remains or follows the wired devices. If it remains, replace the PCB. If it follows the wiring, then further investigation of the sensors and wiring is required.

 

The Dimension firmware was changed at some point to only log marginal low/high res to the engineer log, so not surprising that these are not being reported to the arc.

hello galaxy guy yes I checked the resistance 836 ohms checked zone 2 with respect to 0v and that reads 996 ohms 

thanks 

31 minutes ago, grandmaster14 said:

hello galaxy guy yes I checked the resistance 836 ohms checked zone 2 with respect to 0v and that reads 996 ohms 

thanks 

So it's ok then?

36 minutes ago, al-yeti said:

So it's ok then?

no change from what I said the strangest thing is I checked the zone in the engineer menu and when the pir activates the zone goes from low res to closed 

back to low res all the zones that are normal show open when PIR activates think it might be best to replace pcb 

 

Are you saying that zone 1002 is ok, or that you swapped the zones over ?

 

The values are out of range. Ie. 836 Ohms is too low.  Moisture in the cabling / sensor, wrong resistors, additional resistors Etc ?  You need to fault find the reason for 836 ohms on a 1k/2k circuit.   When the detector is activated, it's opening the contact bringing the circuit into the 900 to 1200 ohms range and not 2k. 

 

Are you sure the detector doesn't have integral resistors and you're adding more in parallel ?

 

Zone closed needs to be between 900 to 1.2k ohms (best 1k).  Open between 1.3k and 3.5k ohm (best 2k).

On 29/01/2018 at 00:34, grandmaster14 said:

Going directly to panel zones 1pir each zone at the panel 

Model no and pictures of detector?