Technical and instalation
manual FLOW 38 Batch Page 18 (of 49) COMAC CAL
s.r.o.
from the inlet and outlet sides right before insertion of the sensor between the pipeline flanges and
replace them with metal plates (0.3 ÷ 0.6 mm thick). After insertion of the sensor, remove the metal
plates and install the screws/bolts.
High temperature pipeline and High temperature medium
At temperatures of the medium to be measured over 100°C, it is necessary to compensate the forces
caused by thermal expansion of the pipeline due to its temperature rise. For short pipelines, it is
necessary to use flexible seals, for long pipelines, use flexible pipe elements (e.g. bends).
The flow sensor must never by thermally insulated. In case that the sensor is placed in a thermally
insulated pipeline, the thermal insulation must be interrupted and the flow sensor is installed without
thermal insulation.
When a compact meter is used (evaluation unit placed on the sensor body), it is necessary to respect
the temperature of medium up to 90 °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.
Installation check
After installation of the flow sensor in the pipeline, the following must be checked:
- According to the name plate, if there is a relevant meter in the given measuring point
(pressure, temperature, dimension, etc.).
- If the direction of the arrow on the device is in agreement with the direction of the flow in the
pipeline.
- Correct position of the measuring electrodes (horizontally).
- Correct position of the electrode for empty pipeline detection (up).
- If all bolts (screws) are tightened properly.
- If earthing rings are used, then their correct installation and connection with the sensor.
- Accuracy of flow sensor earthing.
- Accuracy of execution of the pipeline calming section lengths
- If the sensor is protected against vibrations and mechanical damage.
- If the name plate (serial number) on the sensor corresponds to the one on the electronics.
Wiring
It is necessary that the installation worker has the owner of a valid certification for the installation of
electrical equipment according to the legislation in the country where the installation is performed.
When the operations described below are performed unprofessionally, the claim on warranty becomes
extinct!!! Prior to any opening of the evaluation unit, switch off the power!!! It is necessary to bear in
mind that in case of detached design, the electronic evaluation unit and the flow sensor form an integral
unit which is calibrated and matched uniquely. In consequence, make sure that the serial numbers of
both parts are always identical!!!
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