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Reference Manual
00809-0100-4811, Rev DA
Section 4: Basic Configuration/Start-Up
January 2015
Basic Configuration/Start-Up
4.6.10 Setup - Geometry
The Geometry tab contains information on reference gauge height, probe length, mounting
type, nozzle inner diameter, and nozzle height.
The Reference Gauge Height is the distance from the upper reference point to the bottom of
the tank (see Figure 4-1 on page 62). When setting the reference gauge height, keep in mind
that this value is used for all level and volume measurements performed by the Rosemount
3300 Series Transmitter.
The reference gauge height must be set in linear (level) units, such as feet or meters, regardless
of primary variable assignment.
The Upper Null Zone (UNZ) should not be changed unless there are disturbances at the top of
the tank. By increasing the UNZ value, measurements in this region can be avoided. See
Disturbances at the top of the tank on page 102 for more information on how to use the UNZ.
The UNZ is equal to zero in the factory configuration.
Setup - Environment
The Environment tab contains information about measurement mode, the upper product
dielectric constant and advanced environment options.
Normally the measurement mode does not need to be changed. The transmitter is
pre-configured according to the specified model:
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