Recentley had probs with the Visonic Duo DT with tamper faults - yet a resistance check at the panel shows a couple of ohms replace the detector pcb and the fault clears - this problem has occured using end of line and DP configs - metering the faulty pcb tamper shows ok - had this happen on 3 detectors this week. reckon I'll send the lot back to the supplier.

Anybody else had this broblem ?

Tamper switch probably needs adjusting (bending outwards or slightly stretching spring), old rockonets used to be famous for it. either that or fixing screws too tight and pulling detector case out of shape.