Standard density is calculated as follows:

Symbol | Description | Units |
---|---|---|

ρ_{std} |
Density at standard conditions | kg/Sm^{3} |

ρ_{i} |
Observed density | kg/m^{3} |

P_{std} |
Standard pressure | bar a |

P_{D} |
Pressure at the flow meter | bar a |

T_{std} |
Standard temperature | K |

T_{D} |
Temperature at the flow meter | K |

Z_{std} |
Compression factor standard conditions | - |

Z_{D} |
Compression factor corresponding with observed density | - |