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57-642 ECLIPSE Model 705 Guided Wave Radar Transmitter for Hygienic Industries
Appendix B: Indexing Bent GWR
Probes in Vessels
ECLIPSE hygienic GWR probes are often bent to avoid
obstructions in a vessel or to position the tip of the probe at
the heel of a vessel in order to measure as low in the vessel
as possible. An illustration of a bent probe in a tulip tank is
shown below:
When the ECLIPSE transmitter is configured and calibrat-
ed to measure volume, it is important to assure that, if the
probe is removed from the vessel and then reinserted into
the vessel, the probe is positioned exactly as it was when
originally calibrated. Any rotation of the bent probe may
significantly affect the calibration of the instrument. Note
that rotation of a straight probe does NOT affect calibra-
tion.
We recommend either of two methods to index the bent
probe in a vessel so that the calibration will be preserved:
Match-Marking or Positioning Pin. Both methods are
described below.
Match-Marking
Match-Marking is the marking of the GWR probe process
connection in relationship to the vessel ferrule that it is
mounted in. After the probe is properly bent for the specific
vessel, the probe is properly positioned in the vessel. Before
the clamp is placed on the ferrule/probe joint, the ferrule on
the vessel and the ferule on the GWR probe process con-
nection are match-marked.
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