Revision 8 SLG 700 SmartLine Level Transmitter User’s Manual Page 159
Echo curve inspection (note: a DD or DTM interface is required to acquire echo curves):
1. A misplaced spacer will normally appear as a false level at the 1, 2, 3, 4, 5, or 6 m position.
Misplaced spacer: The red arrow points to the position where the central conductor is likely
touching the outer tube. The point of contact is ~2 m; however, since the level is higher than this
position, the false reflection appears further away due to the index of refraction effect.
This illustrates the same issue; however in this case the level is higher so the false reflection (at 245
cm) is more attenuated and appears further away.
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