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 τc is calculated by
| Where | ||
|---|---|---|
| τ0 | = | The time period constant from the calibration certificate |
| Ct | = | The temperature coefficient obtained from the calibration certificate |
| t | = | The densitometer temperature |
| tr | = | The densitometer reference temperature obtained from the calibration certificate |
| Cp | = | The pressure coefficient obtained from the calibration certificate |
| P | = | The densitometer pressure |
| Pr | = | The densitometer reference pressure obtained from the calibration certificate |
Density Calculation
The density ρ is calculated by:
| Where | ||
|---|---|---|
| D0 | = | A densitometer constant obtained from the calibration certificate |
| τ | = | The measured time period |
| τc | = | The temperature and pressure corrected time period constant |
| K | = | A densitometer constant obtained from the calibration certificate |