I've got a Deltabell E wired to a pyronix enforcer. It's been fine for 2 months then this morning the siren goes off with the log : Bell box tamper lid open at 03:28.59 seconds and at 03:29.08 seconds.12 seconds apart. No rain no wind tamper leveling screw correct and lid correct.

Could this be blip?

 

If it sounded outside the lid opened.

Can't see any evidence or this it's mounted high enough can't get to it without a ladder.

43 minutes ago, Sirenblinky said:

Can't see any evidence or this it's mounted high enough can't get to it without a ladder.

Tighten the tamper screw near switch , this will push the switch tight , you have left it loose if no other problems

1 hour ago, Sirenblinky said:

I've got a Deltabell E wired to a pyronix enforcer.

 

They need securing correctly & careful adjustment to ensure they don't FA

I thought think your all right because when I put it up I did not adjust the screw on the tamper switch I thought it was making good contact with wall. I will check it when it's dry not a lover of heights and ladders

Most Pyronix boxes of all eras have the need some tweaking with the box tamper spring/leaf somehow.

Pyronix used to use plastic that warps and moves when it gets warm or cold. I stopped using Pyronix bells because they were always tampering

4 hours ago, PeterJames said:

Pyronix used to use plastic that warps and moves when it gets warm or cold. I stopped using Pyronix bells because they were always tampering

They still warp , but the deltabell is ok as long as screw is adjusted , especially on pebble dash of old , some newer pebble dash is worse , or that other rough stuff painted over mostly bumps all over the gaf

Well been up the ladder lid off and no screw fitted to back of box to secure the microswitch!

My fault for not reading instructions that came with Deltabell. I wondered what the long screw was for in the accessories pack.Screw fitted this will stop the switch movement.

Must try harder in future.