On Thu, 3 Dec 2009 11:24:35 -0000, slider wrote:

Once power is disconnected, the alarm will activate.

It shouldn't if the panels internal backup battery is OK. Damn thing
would sound if there was a power cut...

Your external bell box will most likely have a battery back up. The
external box will sound until either battery goes flat, or power is
restored and alarm reset.

If the sounder has a backup battery (it should) then it will sound
when once the battery in the panel is flat after the loss of power.
It should also only sound for a few minutes then shut up but it might
sound until that bettery is flat.

Best option is to enter the engineer code into the alarm (if you know
it). This will stop the alarm sounding when power is disconnected.

Which shouldn't happen....

Alternatively, disconnect battery backup from both alarm panel and
external bell box

Without entering engineering mode when you open the cover of either
the panel or the sounder to disconnect the batteries it will trigger
the alarm.

So enter engineering mode, disconect the batteries. Leave the panel
powered up and go away leaving but remember that there will be no
alarm when the power is off. But one assumes that there would be no
alarm anyway unless you give a code to the workmen and trust then to
set it...

--
Cheers
Dave.