flowIQ® 3100 TECHNICAL DESCRIPTION
Kamstrup
A/S • Technical Description • 5512
-1242_N1
_GB •
10.2019
7
1
General description
flowIQ® 3100 covers a series of integrated, hermetically sealed water meters, intended for consumption and
distribution measurement of cold domestic water
–
a
static cold water meter based on the ultrasonic principle.
The cold water meter has been developed on the basis of Kamstrup's experience since 1991 with the
development and production of static ultrasonic meters.
flowIQ® 3100 has been subjected to very comprehensive type tests (OIML R49 ) 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. The meter is powered by an internal lithium battery, providing up to 16 years'
lifetime.
flowIQ® 3100 is constructed as a vacuum chamber of moulded composite material, mounted on a measuring
tube made of brass or stainless steel. Thus, the electronics are fully protected against penetration of water, from
both measuring tube and surroundings. The meter can without problems be placed in minor pumping stations,
and is also suitable for mounting in distribution wells and meter wells, which are frequently filled with water.
flowIQ® 3100 is also intended for measurements in blocks of flats and commercial premises. The meter fits
perfectly into a network of MULTICAL® 21 household meters.
The water meter can and must only be opened by Kamstrup A/S.
If the meter has been opened and the sealing has thus been broken, the meter is no longer valid for billing
purposes and factory guarantee no longer applies.
Water consumption is measured electronically, as a volume, using the ultrasound signal. Through two ultrasonic
transducers, an audio signal is sent with and against the flow direction. A transducer 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 metho
d’,
which is a proven, long-term stable and accurate measuring principle.
In addition to this, the meter is approved with a dynamic range of up to R630
.
(DN100 up to R400)
The accumulated water consumption is displayed by flowIQ® 3100 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 flow and a number of information codes can be
displayed. Furthermore, the water meter continuously measures
*)
temperatures. Based on these measurements,
the meter calculates and stores a minimum, a maximum, and an average temperature for both types of
measurements each day.
*)
Temperature measurements:
o
meter/surroundings
–
all meters
o
current water temperature
–
*)
only in small meter sizes 1.6, 2.5 and 4.0 m
3
/h
All registers are saved daily, in the meter data logger (EEPROM), and are kept for 460 days, monthly data for the
latest 36 months are saved, and furthermore selected data are saved annually for ten years.