TemperatureSensors

Documentation for TemperatureSensors.

TemperatureSensors.temperature — Method
temperature(parameter::Real, sensor::Sensor)

Base function for generic type of sensor. This function trhows error as is the generic function which deals with

Arguments

  • parameter::Real: the value of the independant variable. If for resistive sensors the value of resistance in ohms with which to compute the temperature.
  • sensor::Sensor: the sensor used to measure temperature, any subtype of Sensor is valid.

Example

julia> temperature(100.0,ThermocoupleJ())
ERROR: TemperatureSensors.NotImplementerError()

Output

  • nothing: the general implementation is used when the sensor is not implemented so both an error is thown and nothing value is returned.
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TemperatureSensors.temperature — Method
temperature(resistance::X, sensor::ITS90PT100) where {X}

Function used to calculate the temperature of a Resistance Temperature Device (RTD) based on the ITS-90 PT standard. The interpolation equation was developed for the ITS-90 temperature definition and is defined by parts based on the temperature reference adopted. The temperature function applies only the deviation formula given by:

\[W-Wr=a_5\left(W-1\right)+b_5\left(W-1\right)^2\]

or

\[W-Wr=a_{10}\left(W-1\right)\]

The first equation is used when the resistance provided is smaller than the value of sensor.ITS90_transition_resistance, which is the value of the resistance of the RTD at 273.15K.

The value of W is defined by:

\[W = \frac{`resistance`}{sensor.RTPW}\]

The variable Wr is computed from the general interpolators defined in ITS90ScalePTctes, one interpolator is defined for higher temepratures and another for lower termperatures.

See ITS-90 paper for further reference.

Arguments

  • resistence: The value of the resistance measured in the RTD in ohms.
  • sensor::ITS90PT100: The sensor used to measure temperature. Calibration with the parameters from the ITS-90 equations are required.

Example

julia> sensor = ITS90PT100(-2.0386711E-2, 3.3068936E-3, -1.9700442E-02, 100.0121)
ITS90PT100(-0.020386711, 0.0033068936, -0.019700442, 100.0121, 100.01209954383037, 0.0)

julia> temperature(sensor.ITS90_transition_resistance, sensor)
273.1599988338994
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