TECHNICAL DESCRIPTION MULTICAL® 21 & flowIQ® 2101 /..02 /..03
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Kamstrup A/S •Technical Description • 5512-897_J1_GB • 06.2016
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General description
MULTICAL
21, flowIQ® 2101, 2102 and 2103 is an integrated and hermetically closed water meter,
intended for measurement of cold and hot tap water consumption.
The meter is a static water meter
based on the ultrasonic principle. The water meter has been developed on the basis of Kamstrup's
experience since 1991, with development and production of static ultrasonic meters.
The water meter has been subjected to very comprehensive type tests, in order to ensure a long-term
stable, accurate and reliable meter. One of the water meter’s many advantages is the fact that it has no
wearing parts, which entails longevity.
Furthermore, the meter has a low start flow (low-flow cut-off) in
only 2 l/h, which provides accurate measurement also at low water flows.
The water meter is constructed as a vacuum chamber of moulded composite material. Thus, the
electronics are fully protected against penetration of water. This means that the meter can without
problems be placed in e.g. wet rooms where it is sprayed with water daily; and it is also suitable for
mounting in meter pits, which are frequently filled with water.
The meter can and must only be opened by Kamstrup A/S.
If the meter has been opened and the seals have thus been broken, the meter is no longer valid for billing
purposes. Furthermore, the factory guarantee no longer applies.
The meter measures the water consumption electronically, as a volume, using the ultrasound signal.
Through two ultrasonic transducers, an audio signal is sent with and against the flow direction. A trans-
ducer serves both as a 'speaker' when transmitting and as a 'microphone' when a signal is received. The
ultrasonic signal traveling with the flow will be the first to reach the opposite transducer, while the signal
running against the flow will be received a little later. The time difference, between the two signals, can be
converted into flow velocity, and thereby also into a volume. The measuring principle is called '
bidirectional
ultrasound technique based on the transit time method
', which is a proven, long-term stable and accurate
measuring principle.
The accumulated water consumption is displayed by the water meter in cubic meters (m
3
) with five digits
and up to three decimals, i.e. the resolution has been extended to 1 liter only. The display has been
specially designed to operate in a wide temperature range, with high contrast, regardless of lighting - and
therefore easy to read - and still have long lifetime.
In addition to volume reading, a graphic indication of
current flow and a number of information codes are displayed.
All registers are saved daily, in the meter data logger (EEPROM), and are kept for 460 days. Furthermore,
monthly data for the latest 36 months are saved.
The meter is fitted with an optical eye, which makes it possible to read saved consumption data and info
codes, stored in the meter’s data logger. Using an optical reading head, with USB connection, the optical
eye, in addition, allows configuration of the meter.
The meter comes with integral data communication wireless radio, and powered by an internal lithium
battery, providing up to 16 years' lifetime.