Scientific functions

The application lets you define formulas, in virtual meters, widgets or alerts. These are used to specify calculations that will be made dynamically from stored data from physical meters.

Among the functions available, some can be used to perform scientific calculations, related to physics or energy.

SPECIFIC_ENTHALPY_PT(pressure, temperature)

Calculates enthalpy in kJ/kg as a function of absolute pressure (in bar) and temperature (in °C). The calculation is based on the IAPWS R7-97 formulation for calculating the thermodynamic properties of water in its fluid phases.

Example

SPECIFIC_ENTHALPY_PT(pressure_counter1, temperature_counter1) * 0.0002778

SATURATION_TEMPERATURE_P(pressure)

Calculates the saturation temperature (in °C) for a given pressure (in bar). The calculation is based on the IAPWS R7-97 formulation for calculating the thermodynamic properties of water in its fluid phases.

Example

SATURATION_TEMPERATURE_P(pressure_meter1)
Returns the saturation temperature of water vapour for a pressure worth pressure_meter1.

NORMALIZE_M3_COEFF(pressure_relative, temperature, temperature_normalisation)

Calculates the normalization coefficient for the volume of a gas delivered at a given pressure (in bar) and temperature (in °C).

Exemple

NORMALIZE_M3_COEFF(0.3, temperature_ext, 0)
Returns the PT correction coefficient to be applied to normalise to standard conditions (0°C), a volume of gas at a relative pressure of 300 mbar, and at outside temperature.