KROHNE UFM 3030 EN - Manual (Page 6)

6
UFM 3030
2.3
show loss of signal. There is no damage when this occurs.
Flow direction. The UFM 3030 is a bi-directional flowmeter. Note the indicating arrow for the positive
direction on the flowmeter.
In case of direct sunlight, we recommend installation of a sunshield to prolong the life of the meter.
No direct damage will occur without a sunshield.
Do not expose the signal converter to excessive vibration. For this, support the pipeline on either
side of the flowmeter.
To achieve the specified accuracy, ensure a straight inlet section of 10 × DN (DN = meter size) and
an outlet section of 5 × DN.
Mixing different fluid products. Install the flowmeter 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 flowmeters:
Product temperature compact flowmeter:
Product temperature separate flowmeter:
-40 to +65°C/ -40 to +149°F
-25 to +140°C/ -13 F to +284°F
-25 to +180°C/ -13 to +356°F
a minimum distance between pipe centreline and any adjacent wall of at least 0.5 m (1.6 ft).
Special installation requirements
To avoid measuring errors and malfunctioning of the flowmeter due to gas or air inclusions or an
empty pipe, please observe the following precautions:
Since gas will collect at the highest point of a pipe, installation of the flowmeter at that location
should be avoided at all times. Also installation in a down going pipe should be avoided since a
completely filled pipe may not be guaranteed due to cascading affects. Additionally flow profile
distortion is possible.
Long horizontal pipes:
install in slightly ascending pipe section. If not
possible, ensure adequate velocity to prevent air,
gas or vapour from collecting in upper part of flow
tube As a partially filled meter will report higher
than actual flow rates, or not measure (as
transducer pairs become non-wetted).
Open feed or discharge:
Install meter in a lowered section of the pipe to
ensure a full pipe condition through the meter.
Down going pipeline over 5 m (16 ft) length:
install air vent downstream of the flowmeter to
prevent vacuum. While this will not harm the
meter, it may cause gases to come out of solution
(cavitate) and interfere with proper measurements.