# C135 – Density Computation – Sarasota / Peek

## Description

This calculation returns the density from the time period, calibration constants and process values.

## References

Kelton calculation reference C135

FLOCALC calculation reference F040

KIMS calculation reference K147

## Options

### Calculate

- Air Check

Use this option if you only want to calculate the corrected time period.

- Density

Use this option if to calculate the density, this option also calculates the corrected time period.

## Calculation

All calculations are performed in SI units unless otherwise stated.

### Corrected time period calculation

The temperature and pressure corrected time period constant τ_{c} is calculated by

Where | ||
---|---|---|

τ_{0} |
= | The time period constant from the calibration certificate |

C_{t} |
= | The temperature coefficient obtained from the calibration certificate |

t | = | The densitometer temperature |

t_{r} |
= | The densitometer reference temperature obtained from the calibration certificate |

C_{p} |
= | The pressure coefficient obtained from the calibration certificate |

P | = | The densitometer pressure |

P_{r} |
= | The densitometer reference pressure obtained from the calibration certificate |

### Density Calculation

The density ρ is calculated by:

Where | ||
---|---|---|

D_{0} |
= | A densitometer constant obtained from the calibration certificate |

τ | = | The measured time period |

τ_{c} |
= | The temperature and pressure corrected time period constant |

K | = | A densitometer constant obtained from the calibration certificate |