Fluid Components International CMF User Manual
Fluid Components Intl
4. Installation of
sensor
4.1 Location
4.2 Cavitation
Installation of sensor
To ensure the optimum function of measuring equipment it is important that the installation
instructions are followed closely, point by point.
The flowmeter can be located both indoors and outdoors, but the following conditions must be
observed:
Liquid temperature: -58 to 356°F (-50 to +180°C).
The grade of enclosure can be choosen from
IP 20 up to IP 67.
When the temperature difference between a
liquid and the surroundings is large, the sensor must be insulated to prevent 2-phase flow
and thereby measuring inaccuracy. This applies especially in the case of low flow.
Important!
The sensor must always be completely filled with a homogeneous liquid or gas in single
phase, otherwise measuring errors will occur.
Avoid cavitation in the system, i.e. sucking in or
releasing air into the system, because this may
produce errors.
Static back pressure minimum 0.1 - 0.2 bar.
4.3 Air bubbles
4.4 Mounting
Avoid large quantities of air collecting in the
sensor because these will disturb measurement. Homogeneous mixtures of air and solids, however, will not disturb measurement.
When there is air in the liquid, installation of an
air trap ahead of the meter is recommended.
If there is air/gas in the liquid or liquids which
are volatile, horizontal sensor mounting is
recommended.
The unit must be mounted on a flat wall or steel
frame (vibration-free).
FlexCOR™ Model CMF Series 22
Document 06EN003327 Rev. -
4.5 Vibrations
4.6 Cross-talk
Fluid Components Intl
Locate the flowmeter as far away as possible from components that generate mechanical vibration
in the piping.
Or ensure that there is no direct connection with
them e.g. by using flexible connections.
The flowmeter can also be located after a bend.
Installation of sensor
4.7 Magnetic fields
4.8 Transportation/
storage
Document 06EN003327 Rev. -
If the flowmeters are located close to each other, e.g. in the same pipe section, the meters may
disturb each other in measurement, especially with low flow. Locate the meters with a flexible
connection instead of a permanent connection.
Avoid mounting the meter on the same steel frame. i.e. insulate the meters mechanically.
Locate the sensor a minimum of 10 inches (25 cm) from strong magnetic fields (motors,
transformers, electrically operated valves, etc.).
The sensor is a fragile piece of equipment and shall be placed in its storage carton when
transported or stored. If this is not possible, the sensor must be packed so the packing enclosure
can withstand the hazards from transportation or storage.
23 FlexCOR™ Model CMF Series
Fluid Components Intl
4.9 Horizontal mounting
in pipe CMF B-F
Locate the sensor low in the pipe system in order to avoid low pressure in the sensor and
consequent air separation in the liquid.
If the flowmeter is mounted horizontally it is self-emptying.
With low flow, horizontal mounting is recommended, any air bubbles are easier to remove.
Flow direction
Installation of sensor
0-point adjustment
Static back pressure
Valve
Forward
Normal
Valve
Reverse
Inverse
The arrow on the sensor indicates the direction of flow defined as “positive” (the meter is able to
measure flow in both directions).
If possible, the liquid should flow in the forward direction to avoid partial emptying of the sensor,
especially with low flow.
In addition there should be a valve (check/solenoid) that closes when the flow is zero so that the
liquid does not flow back and causes partial emptying of the sensor.
To facilitate 0-point adjustment, a valve with a good shut-off should always be mounted near the
sensor.
- The sensor should be completely filled with liquid.
- The valve must be closed.
- Wait a few minutes to let the flow stabilize at zero.
- Activate the 0-point adjustment, see Chapter 7 "Setting the 0-point".
FlexCOR™ Model CMF Series 24
Document 06EN003327 Rev. -
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