Applications
Water/heat (quantity)
Application areas
Calculation of heat quantity in a water circuit, e.g. calculation of the heat rests in a heat
exchanger return.
Measurements
Measurement of operating volume and temperature in a water circuit. A pressure sensor can also
be connected in order to measure the operational pressure in the circuit. This pressure
measurement has no influence on the actual calculation (see inputs).
Inputs
• Flow (q)
• Temperature (T)
Note!
For an exact calculation of the process values and measurement range limits, a further input for the operating
pressure of the water network is required. The average operating pressure (p) is a preset value (not an input
signal). The pressure can only be entered as an average signal, even if the pressure is measured using a pressure
sensor.
Calculated values
Calculation of mass flow, heat flow, specific Enthalpy, density
(IAPWS–IF97 Standard).
Output values/display at the unit
• Heat flow (power), mass flow, flow (operating volume), temperature, specific Enthalpy,
density
• Heat sum, mass sum, flow sum.
Outputs
All output values can be transmitted using the output terminals, this means both unchanged
inputs as well as calculated values. Please note that the number of outputs available is dependent
on the unit type.
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