COMAC CAL FLOW 32 Installation And Technical Conditions page 7

During installation, beware of:
- dropping the sensor on the ground and damaging
- contamination of the electrodes (do not touch the electrodes, otherwise they get
contaminated)
- when additional sealing is used, avoid its interference in the flow profile of the
detector between the flanges and the pipeline, otherwise the flow measurement error
may be increased
Earthing
For reliable and correct operation of the induction sensor it is necessary to provide proper
protective and working earthing. The earth line must not transmit interference voltages so the
other electrical devices must not be earthed by means of this line. The flow sensor is provided
with the M5 earthing screw of stainless steel with a washer and nut for proper connection of
the sensor body. If a piping system is not earthed properly, it is necessary to connect the earth
point of the meter with the electrical potential of the earth d so that proper earthing is reached
and the meter can operate reliably.
Electrodes
The purity of the electrodes may have an influence on measurement accuracy, their heavy
foulness may cause even the interruption of the measuring function (isolation from the liquid).
It is not necessary to clean the electrodes right after delivery before their installation in the
pipeline. If the electrodes indicate signs of foulness, clean them with a soft cloth or use a
chemical cleaning agent. Mind damaging to the lining! During routine operation, in case of a
great majority of liquids, it is not necessary to clean the flow meter for the entire operation
period of the flow sensor; self-cleaning by flow of the liquid is sufficient (recommended
velocity is over 2 m/sec).
Temperature of medium
For the meter, it is necessary to respect the temperature of medium up to 70 °C. In case of
exceeding this temperature, the correct functionality of the electronic evaluation unit is not
guaranteed, or there is a risk of its destruction.
FLOW 32 manual Page 7 (total 18) COMAC CAL s.r.o.