C245 – DAC Output Check

Description

This calculation performs an DAC check which can be used for the calibration of equipment where there is a linear relationship between the input and the output.

References

Kelton calculation reference C245

KIMS calculation reference K123

Options

Primary variable

  • Scalar
  • Factor
  • Pressure
  • Temperature
  • Volume flow rate
  • Mass flow rate

This option allows user to select the relevant input type.

Transmitter Output

  • Current
  • Voltage

This option allows user to select whether the transmitter output is a current or a voltage.

Display output as voltage

Converts output current into a voltage.

Display output as current

Converts output voltage into a current.

Square root extraction

This option is selected if the input has a square root relationship with the output.

Calculation

Output Value

The output value is calculated by:

Or when square root extraction is applied:

Where
PV = Primary variable value
PVmax = Primary variable maximum value
PVmin = Primary variable minimum input value
OPmax = Upper range output value (which corresponds to the set maximum input value) for the instrument being calibrated
OPmin = Lower range output value (which corresponds to the set minimum input value) for the instrument being calibrated

 

 

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