KROHNE UFM 3030 Service EN - Manual (Page 31)

UFM 3030 31
Function 3.01.10 Definition of forward flow direction
The forward flow direction is indicated with an arrow on the flow sensor. If the actual flow is in the
direction of the arrow then the flow is in the positive direction and the converter will have a positive
flow reading. By setting this function to NEGATIVE, the converter's reading can be reversed. This
can be useful when the process flow direction is changed so the flow sensor will not need to be
reversed.
Function 3.01.11 through 3.01.12 Minimum/Maximum velocity of sound
In media of varying composition, the ultrasonic wave speed will vary, like in oil-water mixtures. This
is identifiable by means of measuring the velocity of sound. The current output and the pulse output
can be programmed to indicate the velocity of sound, see Function 3.04.01 and 3.05.01. Their
"zero" values (0% scale) will then correspond with the velocity of sound set in Function 3.01.11 MIN
VOS, where their "full-scale" values (100% scale) will correspond with the velocity of sound set in
Function 3.01.12 MAX VOS. See also Function 3.03.06 VOS for the display of the velocity of
sound. NOTE: Only necessary for setting span for outputting VOS, is not needed to measure flow!
Submenu 3.02.00 Version
Function 3.02.01 Function of converter
This function is factory pre-set, and can be changed between STANDARD and the appropriate
version that is defined in the converter's hardware. The following versions are possible:
STANDARD, standard functionality
CORR T version with temperature correction of the measured flow, using analog input 1
CORR T+P version with temperature- and pressure correction of the measured flow, using analog
inputs 1 and 2
HEAT version, reserved for measurement of heat power and heat energy totalisation.
BATCH version for batch volumes.
The batch function can be used for repetitive dosing of a fixed volume. It provides simple single
stage batching. A batch volume can be set using FUNCTION 3.2.13. The digital input is used to
start a batch, see FUNTION 3.6.1. The digital output is used to indicate that the set batch volume
has been reached, see Function 3.5.1. The forward flow Totalizer counts the actual batch volume
and is reset at the start of every new batch. The reverse flow Totalizer counts the total of all
batches.
The following table gives an overview of the additional features of each version, in comparison with
the standard version.
Remark: with every change from a converter function to STANDARD, the Totalizer is switched off.
See function 3.03.03 to set the Totalizer