ULTRAFLOW®54(H)/(J)
KamstrupA/S∙TechnicalDescription∙5512‐1554_J1_GB_04.2018
37
7.7.3 Calculator with two flow sensors
MULTICAL
602/603 and 801 can be used in various applications with two flow sensors, e.g. leak monitoring or
open systems. When two ULTRAFLOW
sensors are direct connected to one MULTICAL
, a close electric coupling
between the two pipes ought to be carried out as a main rule. If the two pipes are installed in a heat exchanger,
close to the flow sensors, however, the heat exchanger will provide the necessary electric coupling*.
Figure 32. Forward and return pipes are closely electrically coupled*
Electric welding does not occur
In installations where the electric coupling is not possible or welding in the pipe system can occur, the cable from
one ULTRAFLOW
must go through a Pulse Transmitter with galvanic separation before the cable enters MULTICAL
.
Figure 33. Forward and return pipes are not necessarily closely coupled.
Electric welding *) can occur.
*)
Electric welding must always be carried out with the earth pole closest to the welding point. Damage to meters
due to welding is not comprised by Kamstrup's factory guarantee.
7.8 Testing the function
Carry out an operational check when the complete meter (flow sensor and calculator) has been installed and
connected. Open thermo-regulators and valves to establish water flow through the system. Activate the top button
of the calculator and check that the displayed values for temperatures and water flow are credible values.
* Electrical coupling
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