Technical and instalation
manual FLOW 38 Batch Page 5 (of 49) COMAC CAL s.r.o.
Description of device
The FLOW 38 Batch meter is based on measurement principle by a well-known Faraday's
electromagnetic induction law according to which an electric voltage is induced during the flow of a
conductive liquid through the flow meter magnetic field. This is picked up by two electrodes in direct
contact with the measured medium and evaluated in the electronic unit.
The FLOW 38 Batch type of induction meters are suitable exclusively for measurement of volumetric
flow of electrically conductive liquid substances with a minimum conductivity of 20 µS/cm (at a lower
conductivity, upon agreement with the manufacturer).
Meters are designed for flow measurement where the velocity of liquid is in the range of 0.01 ÷ 12
m/s. The best measurement accuracy can be obtained in the range of 1 ÷ 10 m/s.
Scope of delivery
Accessories vary according to the variant of flow sensor and above standard optional features.
Threaded design
Electronic evaluation unit with a fixing bracket for wall mounting (not for the compact design), flow
sensor (in case of compact design, the electronic unit is integral part of the flow sensor), connecting
grounding cable, installation manual.
Sandwich design
Electronic evaluation unit with fixing adapter for wall mounting (not for the compact design), flow
sensor (in case of compact design, the electronic unit is integral part of flow sensor), bolts for
installation of the sensor between flanges (quantity as per tightening torque table, see below) with nuts
and washers, connecting grounding cable, installation manual.
Flanged design
Electronic evaluation unit with fixing adapter for wall mounting (not for the compact design), flow
sensor (in case of compact design, the electronic unit is integral part of flow sensor), connecting
grounding cable, installation manual.
Food industry design
Electronic evaluation unit with a fixing bracket for wall mounting (not for the compact design), flow
sensor (in case of compact design, the electronic unit is integral part of the flow sensor), adapter piping
connection according to DIN 11851, installation manual.
In case of detached design, a special cable for connection of the meter (it must not be extended or cut
short) is part of the flow sensor.
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