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How to remove the tamper on the control panel on my scantronic 9450 unit?

I have a scantronic 9450.I have just replaced a door in my hallway and replaced the old door sensor into the new door but am unable to set the alarm.The panel shows Tamper and i am unable to resolve this.Can you help
Richard Laidler, December 2010
the door sensor if its a magnetic contact will have 4 wires,two are switch wires ,two are tamper wires,the tamper wires should be connected together,check these are wired like this

gts, December 2010
link Click here to see other fixes for Scantronic 9450.