KROHNE UFM 3030 Service EN - Manual (Page 9)

UFM 3030 9
If required the position of the signal converter can be modified by turning the display circuit board
through 90° or 180° to achieve a horizontal position of the display. In addition the signal converter
housing may be turned through 90° opposite the flow sensor.
For an exact description of this procedure, refer to chapter 8.6.
The measuring tube must be completely filled at all times for proper flow measurement, as the
sensors become non-wetted, a loss of signal message will be displayed. There is no damage
when this occurs.
Flow direction. The UFM 3030 is a bi-directional flow meter. Note the indicating arrow for the
positive direction on the flow meter.
It is recommended to protect the signal converter from direct sunlight to prolong the life. Although
no direct damage will occur, installation of a sunshield is advised.
Do not expose the signal converter to excessive vibration. To protect the flow meter from
excessive vibration support the pipeline on either side of the flow meter.
Make sure there is sufficient room next to the pipe flanges to fit the bolts and nuts.
To achieve the specified accuracy of the flow meter, a straight inlet section of 10 × DN (DN =
meter size) and an outlet section of 5 × DN should be applied.
Normally zero setting is not necessary, but if required the zero point can be checked and the
meter can be re-zeroed under stationary flow conditions (see Function 1.01.03 of the converter
menu). To force zero flow, a shut-off valve should be provided upstream and/or downstream of
the flow sensor.
Mixing different fluid products. Install the flow meter upstream of mixing point or at minimum
distance of 30× DN (DN = meter size) downstream of the mixing point, otherwise the flow
measurement may be unstable.
Ambient temperature all flow meters: -40 to +65°C/ -40 to +149°F
Product temperature compact flow meter: -25 to +140°C/ -13 F to +284°F
Product temperature separate flow meter: -25 to +180°C/ -13 to +356°F
Special versions are available for higher process temperatures.
In case of a pipeline running along a wall: please observe a minimum distance between pipe
centreline and the wall of at least 0.5 m (1.6 ft).
2.3 Special installation requirements
To avoid measuring errors and malfunctioning of the flow meter due to gas or air inclusions or an
empty pipe, please observe the following precautions: