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 |