Emerson Rosemount 5600 Series, Справочное руководство

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64
Reference Manual
00809-0100-4024, Rev CA
Configuration
March 2020
Configuration
4.2.1 Basic configuration
The parameters are divided into several categories listed below. Configuration includes specification of
parameters for:

“ Antenna ” on page 64

“ Tank geometry ” on page 66

“ Analog output ” on page 68

“ Process conditions ” on page 70

“ Temperature measurement ” on page 70

“ Volume calculation ” on page 71
4.2.2 Advanced configuration
When the basic configuration is done the transmitter will be optimized for your application. However, in
some cases the transmitter must be further configured using the Advanced Functions (this may affect
the previous basic configuration by updating some parameters already set). See the
“ Advanced
functions ” on page 71 .
4.3 Antenna
For the antenna a few choices are available. The type of antenna must always be selected and, if
applicable, corresponding type of tank sealing to be used. User-Defined is for non-standard antennas
only.
The following parameters are used:
Hold Off Distance
The (UNZ) defines how close to the transmitter’s reference point a level value is
accepted. Normally, the Hold Off Distance is set automatically and does not need to be
changed. However, if there are disturbing echoes in the upper part of the tank, for
example from the tank nozzle, you can increase the Hold Off Distance in order to avoid
measurements in the region close to the antenna. (See
“ Setting the Hold Off distance ”
on page 47 ).
Pipe Inner Diameter
The figure is used to compensate for the lower microwave propagation speed inside the
pipe. An incorrect value will give a scale factor error. Only valid for pipe antennas or cone
antennas in existing still pipe. If locally supplied still pipes are used, make sure the inner
diameter is noted before installation of the pipe.
Tank Connection
Length
The (TCL) parameter is entered for antenna type User-Defined only. For standard
antennas the TCL value is set automatically. For the 500 mm extended cone use the
TCL
ext
values in Table 4-2 . (See “ Setting the tank connection length (TCL) ” on page 46 ).
Hold Off
Distance (UNZ)