Ultraflux Uf 841, User Manual

Page: 65 / 105

65
NT UF 841 CP GB (d) / June 2015
6.1 Principle
Each Uf 841 includes a miniature PLC. This PLC allows Ultraflux to easily install additional features for this
flow meter.
On request, Ultraflux can quickly integrate a new feature for your Uf 841.
6.2 Application examples: Calorimetry
6.2.1 Water temperature calculation
The water temperature can be determined from its celerity (via a calculation).
You will find in the appendix the polynomial used to determine the temperature of the water based on the
celerity measured by our flow meters.
The function engine allows us to carry out this calculation internally in the flow meter.
6.2.2 Calorimetry
It is possible to measure the heat flow of an installation.
If a cold temperature measurement and hot temperature measurement is combined with the flow rate
calculated by the flow meter, the heating power expended can be measured.
The diagram below shows a typical measuring point for this application:
The following graph illustrates a measurement result typical of the application of calorimetry, the values
displayed being:
•
the temperature difference between the probes,
•
the instantaneous heating capacity,
•
the kWh totalizer.
Hot water
Cold water
Heating
Temperature measurement 2
Temperature measurement 1
Q
measurement