Test benches for heat meters

Adjustment and calibration of heat meters
or heat flow calorimeter

A heat meter is a device which measures thermal energy provided by a source or delivered to a sink, by measuring the flow rate of the heat transfer fluid and the change in its temperature (ΔT) between the outflow and return legs of the system. It is typically used in industrial plants for measuring boiler output and heat taken by process, and for district heating systems to measure the heat delivered to consumers. If heat meters are used for billing heating costs, they must be checked or calibrated.

The test bench is used to determine the measurement deviation over a flow range from 5 l/h to 20,000 l/h in a temperature range from 7 °C to 85 °C to adjust the temperature measurement range of the heat meter. The system allows flexible and exact control of flow profiles and constant water temperatures.

Technical data

Volume flow5…20,000 l/h
Water temperature7…85 °C


  • High precision of flow generation and the volume determination
  • Flexible control of flow profiles
  • High measurement accuracy through MID
  • Test items per test section (depends on the respective overall length): 10 pieces per test section (maximum of 20 pieces in total)
  • DUT interface:
    – NOWA 2.0
    – downward compatible with NOWA V1.5

The test is carried out in accordance with the
test instructions for calibration and for the
metrological qualification of flow sensors as
sub-devices for determining the amount of
heat. (GM-P 7.2 heat meter – flow sensor)

As of May 19, 2020

Are you interested in further details?

If you have any questions, please do not hesitate to contact our EP-E service team.