Installation Examples - COMAC CAL FLOW 45 Installation And Technical Conditions

In the case that the sensor is equipped with an empty pipe testing electrode (3rd or 4th electrode in the
upper part of the measuring tube profile), there is no risk of erroneous readout of quantity of liquid
passing through the meter due to aeration of measuring electrodes.
The function of empty tube detection in horizontal mounting position
operates correctly only if the evaluation unit is oriented upwards (see Fig.
on right). Alternatively, it is not possible to ensure that the activation of
empty tube detection in case of partly filled or empty pipes will take place.
Due to the principle, it is necessary that the maximum
conductivity of medium is 6000 µS for ensuring the
functional evaluation of empty tube. Beyond this limit, errors
may occur in empty tube test, and in this case, it is necessary
to deactivate the empty tube test. If the conductivity of
medium is beyond the permissible range, the meter may,
despite the flooded system, register empty pipeline and the
measurement will not start.
In case of any intervention into the measuring circuit must be accessed like a pipe is fulfilled of
medium, and regardless of the displayed information "empty pipe test" on the display meter !!!
Trouble-free and exact operation of the meter is dependent on its correct location in the system. The
most frequent methods of the placement are shown in the following figures:
Recommended installation locations
Bubbles are accumulated in the
pipeline; erroneous measurement
Correct
location
Horizontally laid pipeline
Place the sensor in a slightly
ascending pipeline
Manual FLOW 45

Installation examples

Downtake pipe
Install an air bleed valve
Pipeline is
empty;
erroneous
measurement
Long pipeline
Install controls and shut-off
valves always after the sensor
Page 6 (total 28)
after the sensor
COMAC CAL s.r.o.