Chapter 4: Operations and Adjustments
RTMS Echo User Guide ©2019 Image Sensing Systems Inc. 4-11
Condition B: Under
Count in Near Zone
In the situation shown in Figure 4-4, the count for zone 1 is well below what is
expected; vehicles are being missed.
Figure 4-4: Under Count: Near Zone
The above is probably due to aiming issues. The sensor may be missing small
profile vehicles. Check the aiming of the RTMS Echo and make sure it is
aimed down enough to view the first zone of traffic (zone 1).
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