# 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 |

PV_{max} |
= | Primary variable maximum value |

PV_{min} |
= | Primary variable minimum input value |

OP_{max} |
= | Upper range output value (which corresponds to the set maximum input value) for the instrument being calibrated |

OP_{min} |
= | Lower range output value (which corresponds to the set minimum input value) for the instrument being calibrated |