TECHNICAL DESCRIPTION flowIQ® 3100
40
Kamstrup
A/S • Technical Description •
5512-1242_N
1_GB •
10.2019
16.10
Temperature monitoring
The water meter measures water
*)
and ambient/meter temparatures, respectively. The measurements can be
used to monitor the installation and to give an indication of the quality of water. Both temperatures
*)
are stored
in the meter's daily and monthly records.
For each day, temperature values, minimum, maximum and average are stored in
the 24 hours’
register.
The register contains the last 460 days.
Each first day of the month, temperature values, minimum, maximum and average, for the latest month , are
stored in the monthly register.
The register contains the last 36 months. Furthermore the minimum and maximum values are stored in the
yearly register.
Temperature values, are referred in °C and can be read using the optical eye. These values are sent via the radio
signal (or via Wired M-Bus datagram).
The temperature values can be combined, as described in section
Optional register in data logger
.
See more about temperature reading accuracy in the section
.
16.10.1
Temperature monitoring
–
Ambient/meter
Monitoring ambient/meter temperature in the installation can be used for warnings of freezing or unintended
high temperatures. The measurements of the meter temperature are made inside the meter housing, which
corresponds to the ambient temperature in the environment where the meter is installed. The temperature is
measured every minute.
The maximum and minimum values are based on a
‘
two-minute averaging value
’
. The average temperature is a
time-weighted mean value.
16.10.2
Temperature monitoring
–
Water
Monitoring the water
*)
temperature can be an indication of quality of the water, when it reaches the consumer.
Every 32 seconds, an indirect measurement of water temperature is made, using the ultrasound signal. The
maximum and minimum values are calculated every 2 minutes, based on a volume weighted mean value, since
the last minimum/maximum temperature calculation.
Measurement of water temperature
*)
requires that the meter is filled with water. If there is no water in the
meter, it saves a code, saying that the meter is not water filled.
During periods of very low water consumption, the water temperature approaches the ambient tempera-ture.
During periods without water flow the weighted average cannot be calculated and then a code 128
is stored, indicating that there is no consumption.
*
Measuring the water temperature is only valid for meter sizes 1.6, 2.5 and 4.0 m
3
/h