Heath Consultants Remote Methane Leak Detector (RML) - Manual (Page 25)

Be aware of the ground elevation. Scanning across the top of a knoll or past the edge of a
structure can result in beam skips (a sudden change in distance) which may give you a
false detection.
Fig. 4-1: Sudden change in distance may cause a false detection.
Obstructions or variations in the landscape can cause dark zones where the laser doesn’t
scan. Look for the best angle to thoroughly scan these areas. Scanning up a hillside may
cause beam skipping or dark zones around the foundation of a structure.
Fig. 4-2: Ground elevation change or obstructions in the line of sight will cause “dark zones”
(shadows).
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101515-0 RMLD MANUAL REV E