Calculator With Two Flow Sensors; Operational Check - Kamstrup ULTRAFLOW 54 Technical Description

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TECHNICAL DESCRIPTION ULTRAFLOW 54 and 34

7.11 Calculator with two flow sensors

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MULTICAL 602 and 801 can be used in various applications with two flow sensors, e.g. leak surveillance and
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open systems. When two ULTRAFLOW 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.
Electric coupling
Figure 24. Forward and return pipes are closely electrically coupled.
No welded joints occur.
In installations where the electric coupling cannot be carried out, or where welding in the pipe system
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can occur, the cable from one ULTRAFLOW must be routed through a Pulse Transmitter with galvanic separation
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before the cable enters MULTICAL .
Figure 25.Forward and return pipes are not necessarily closely coupled.
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Electric welding can occur.
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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.

7.12 Operational check

Carry out an operational check when the complete meter (flow sensor and calculator) has been installed and
connected. Open thermoregulators and cocks to establish water flow through the installation. Activate the top key
of the calculator and check that the displayed values for temperatures and water flow are credible values.
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5512-385 GB/02.2014/Rev. H1