Fluid Components International CMF Series Manual Installation of Flow Element - Manual (Page 6)

Installation of sensor
Fluid Components Intl
Document 06EN003327 Rev. - 27 FlexCOR
™
Model CMF Series
Locate the sensor low in the pipe system in order to avoid low pressure in the sensor and
consequent air separation in the liquid. Due to the capillary tube effect, the sensor is not self
emptying.
When there is low flow, horizontal mounting is recommended, the air bubbles are easier to
remove.
To avoid separation of air from the liquid, a back pressure of min. 0.1 - 0.2 bar is recommended.
4.14 Horizontal mounting
in pipe
To obtain the optimum performance, the multiple plug should be mounted as shown in the drawing.
The multiple plug can be turned withing the angles stated.
Multiple plug orientation
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 direction of the arrow (on the sensor) 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 the liquid
does not flow back to produce partial emptying of the sensor.
To facililate a good 0-point adjustment a valve should always be installed to ensure that 0-flow
condition can be obtained.
Flow direction
0-point adjustment
- 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".