How can I tell EOL?


Active Member
I'm looking to replace my existing builder grade alarm panel with my new Elk M1 and have not done much at all with security in the past. How can I tell if / what value of EOL resitors exist in my current system? They're not at the panel from what I can tell. Multimeter? If so, what should I look for?
Get an "autoranging" digital multimeter. You can spend anywhere from 20's to 100's of dollars.

Take the wires going to a zone and with the zone "secure" set the multimeter to "ohms" value (setting looks like a horseshoe).

Plug the leads into the multimeter. YOu should see something like "OL" on the meter's display indicating an open circuit.

Touch the meter leads together and you should see a near zero reading.

Touch each meter lead to an end of a wire from a zone. Make sure your fingers are not touching any metal part of the leads or wire.

You should now be reading your EOL value.

Open the door/window (unsecure the zone) and you should see the value change to an open load.