if it is receiving correctly from all nodes. After waiting the 20 seconds, if the orange or yellow
LEDs are lit, a node may not be turned on or configured correctly, or the area may be too large for
the number of nodes you are using. Please refer to the “LED Status Indicators” section for more
information about how to interpret the LEDs.
2. Try moving around within the detection area to verify that motion is properly being sensed. The
red LED on the PU turns on when motion is being detected. You may need to adjust the sensitivity
to maximize detection performance (see instructions on how to change the sensitivity below).
After movement has stopped, it may take a few seconds for the system to stop indicating motion.
If nodes are moved, it will take longer for the motion detection to turn off after movement has
stopped.
If detection performance is poor even after adjusting the sensitivity threshold, the area may be too
large for the number of nodes you are testing. Try using a larger kit, or reduce the total detection
area by moving nodes closer together.
3. It is important to also test motion on the outside of the perimeter for false triggering. When the
area is enclosed by heavy walls like brick, masonry, or concrete, outer perimeter motion will
usually not be a problem. In open or thinwalled areas like drywall or thin wood, motion close to
the perimeter of the detection area may cause false triggering. If this occurs, reduce sensitivity by
raising the threshold as explained below, move nodes further inside the perimeter, or restrict
access to the area just outside the perimeter by a few meters.
4. Do not deploy the system around or near trees that may blow in the wind, as they may cause false
triggering. If heavy walls surround the detection area, trees on the outside should not be a problem
regardless of wind.
To check the current sensitivity threshold of the motion detection, do the following:
1. Click S1 on the PU one time.
2. Click S2 on the PU two times.
3. Count the number of times that the LEDs blink to determine the current setting for the motion
sensitivity threshold.
To adjust the sensitivity of the motion detection, change the threshold on the PU by doing the
Copyright © 2015 XANDEM
TMD User Guide (Rev C.2) Page 10
