Hi,

Our alarm system has just started playing up. Typical, just a few days
before we are due to go away on holiday.

Its a Scantronic 9800 and it just went off reporting 'tr' which is
tamper return. After digging around for about half an hour, I managed
to find the instructions. I have the user guide and the installation
instructions as I fitted it myself quite a few years ago.
There isnt much info on the tamper return, but from what I can remember
its just the switch in the bell box housing. When the switch is
closed, its returning 0v when its open it returns +v.
As a temporary measure, I have disconnected the return wire from the
bell box that goes onto the tr terminal and put in a piece of cable
that loops from the 0v terminal into the tamper return terminal (all in
the control panel). I have done a quick test and it appears to be
functioning OK. Is this the correct thing to do ? or will it have some
side effect?

Thanks

Alan