TECHNICAL DESCRIPTION flowIQ® 3100
20
Kamstrup A/S • Technical Description • 5512
-
1242_B1_GB • 05.2015
8.4
Data function: Maximum flow and minimum flow
flowIQ® 3100
registers maximum and minimum flow on a daily as well as monthly basis. Maximum and
minimum flow
are calculated as the largest and the smallest value respectively of a number of current flow
measurements. The average period used for all calculations can be selected in the interval 1...120 minutes
in leaps of one minute. The choice must be made when submitting the order.
If no choice is made, the average period will by default be
2 minutes
.
The Wireless M
-
Bus signal includes max. flow of latest full month if selected during the customer specific
configuration.
(see paragraph 8.6
'Optional register in data logger’)
Values of maximum and minimum flow are saved in both daily and monthly registers. Daily registers of the
latest 460 days and monthly registers of the latest 36 months are always readable via the optical eye.
The development of maximum flow can indicate an error in the water installation. If e.g., max. flow falls
over a longer period, this can be a sign of a blocking in the installation or a leakage in the supply pipe
before the meter.
8.5
Data function: Measuring temperature
8.5.1
Temperature monitoring
The water meter measures water
*)
and ambient 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 of the first
day
of the month
, temperature values, minimum, maximum and average,
for the latest
month , are stored in monthly register.
The register contains the last 36 months. Temperature values,
are referred in °C and can be read using
the
optical eye
. These
are sent via
the wireless Wireless M
-
Bus radio signal. The tempera
ture values can be
combined, as described in section
'Optional register in data logger'.
See more about temperature reading
accuracy in section 2.6.
*)
Applies only for meter sizes 1.6 and 2.5 m
3
/h
8.5.2
Ambient temperature
Monitoring ambient temperature in
the installation can be used for warnings of freezing or unintended
high temperatures. The measurement
s
of the meter temperature
are made inside
the meter housing,
which corresponds to the ambient temperature 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.
8.5.3
Water temperature
Monitoring the water
*)
temperature
can help to indicate 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.
