Emerson Guided Wave Radar Level and Interface Transmitters 3300 - Manual (Page 61)

Reference Manual
00809-0100-4811, Rev CA
February 2006
4-9
Rosemount 3300 Series
BASIC CONFIGURATION This section describes the various HART commands used to configure the
3300 Series of transmitters for level measurements. The transmitter outputs a
4 - 20 mA signal proportional to the primary variable. Three additional
variables are available through the HART signal.
Transmitter Variables
You may assign up to four transmitter variables. Typically, the primary variable
(PV) is configured to be Aggregate Level, Interface Level or Volume.
For the model 3301 the primary variable is typically set to be Level. If the
transmitter is in the Immerse Probe mode (see section Measurement Mode)
the PV is normally set to Interface Level.
For the model 3302 the PV is typically set to Interface Level, but Level and
other options may also be used.
Measurement Units
Set transmitter units for level and temperature.
Reference Gauge 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 4-2). When setting the
Reference Gauge Height, keep in mind that this value is used for all level
measurements performed by the 3300 Series transmitter.
The Reference Gauge Height must be set in linear (level) units, such as feet
or meters, regardless of primary variable assignment.
Probe Length
The probe length is the distance from the Upper Reference Point to the end of
the probe, see Figure 4-1. If the probe is anchored to a weight do not include
the height of the weight. This parameter is pre-configured at factory. The
Probe Length needs to be changed if, for example, the probe is shortened.
HART Comm 1, 1, 1, 1
HART Comm 1, 3, 1
HART Comm 1, 3, 2, 1
HART Comm 1, 3, 2, 2