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4. Test your wired zones.
Checking the integrity of your wired contact sensor zones will ensure that the
zones can be connected to the Retrofit Alarm Kit. Wired contact sensor zones
must create a complete closed loop in order to work properly with Retrofit
Alarm Kit.
Before you begin this step, check that all doors and windows are closed. To test
your contact sensor zone using a continuity tester or multimeter:
A. Identify which zones are contact sensor zones using the alarm diagram.
B. Remove one contact zone (2 wires) from your wired alarm panel.
C. Turn on your multimeter and set it to measure resistance.
D. Wrap one end of the exposed zone wire around one of the testing probes.
E. Wrap the other zone wire around the other probe. (Be careful not to
touch the probes.)
If the zone test is successful, the multimeter will show a number.
This number will vary based on your system. If the number is between
0 and 5200 ohms, congrats! This zone can be successfully wired to the
Retrofit Alarm Kit.
If the number is larger than 5200 ohms, the resistance is too great to work
with the Retrofit Alarm Kit.
If the zone test failed, the zone test will show the letters OL or Open Loop.
This means that the zone is open. Check that all doors and windows in your
home are closed. If everything is closed, there is no visible damage to the
wiring or sensors, and the tester still reads OL, then there is an issue within
that zone that needs to be diagnosed and repaired. If not repaired, this
zone can’t be added to the Retrofit Alarm Kit.
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