Heath Consultants HPN105354, Руководство оператора

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Doc No. 105408 Rev C, RMLD-CS Operator Manual
RMLD-CS Operator’s Manual
Manual
© 2021 Heath Consultants Incorporated. All rights
reserved.
59
Dealing With False Detections
While using the DMD mode, several conditions may occur that will cause the algorithm to give a
detection indication. The most common situations are:
•
Abrupt or jerky motions causing the scanning distance to rapidly change.
•
Overly strong returns due to strong reflectors.
The most common point that a false detection occurs is in the 50 feet (15 m) range. This is due to
the beam footprint becoming very large. Abrupt motion, change in terrain, or distance to an object
may cause the DMD to give a short low detection. To verify if the detection is due to a leak, pause at
this distance, aim off to the side and re-sweep across the area to determine if gas is present.
Scanning from a long range to a short range will also minimize false detection.
Strong reflections off certain types of surfaces (e.g., black garbage bags, water droplets, glass,
polished surfaces, stones, license plates, reflectors, etc.) may give a false detection. Re-scan the
area from a slightly different angle.
Scanning Through Windows
:
The RMLD-CS is capable of scanning through windows to possibly detect methane gas.
However, scanning through windows is not guaranteed. False positives and negatives may occur.
Do not aim straight into a window. Keep to an angle, 30 – 60 degrees from direct is recommend and
sweep across the window slowly. The laser may not penetrate certain window types effectively such as
tinted, double pane, stenciled, etc. If there is no gas reading indicated do not assume there is no gas
within the structure. Continue scanning common venting points as referenced in the image below.