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Reference Manual
00809-0700-4530, Rev AA
Section 2: Installation Considerations
September 2013
Installation considerations
When probes are anchored, the forces are two to ten times greater than with
free-hanging probes. To prevent an extremely high tensile load when fixing the probe,
and to reduce the risk of probe breakage, the probe must be slack. Select a probe
longer than the required measuring range so that there is a sag in the middle of the
probe that is greater than or equal to 1
1
/2 in. per 10 feet (1 cm per m) of the probe
length
Figure 2-23. Fixing probe with slack
For applications with a probe length longer than 115 ft. (35 m), please consult factory
Consider using a non-contacting radar for abrasive media that can wear out the probe
For solids measurement, a Rosemount 5300 Series with Signal Quality Metrics (SQM) is
recommended to help monitor possible build-up on probe. Use the ‘Measure and Learn’
function to reduce the impact of possible stationary disturbances in the tank. The Rosemount
5300 Series solids measurement might require activation of the Probe End Projection (PEP)
function. See pages 47, 39, and 48 for details on how to activate SQM, Measure and Learn, and
PEP.