# C264 – Flow Rate – Pulse Output Meter

## Description

This calculates the flow rate for pulse output based meters.

## References

Kelton calculation reference C264

KIMS calculation reference K206

Kelton calculation C244 – Calibration Correction

Kelton calculation C248 – Gas Flow Rate Conversion from Qv

Kelton calculation C261 – Gas Flow Rate Conversion from Qm

Kelton calculation C262 – Liquid Flow Rate Conversion

## Options

### Factor Type

- Meter Factor
- K-Factor

This option is used to select the whether a meter factor will be applied to the flow rate calculation. Note that K-factor will always be an input.

### Meter Type

- Volume
- Mass

This option is used to select whether physics of the meter in question infers mass or volume flow rate from its direct outputs.

### Fluid

- Gas
- Liquid

This option is used to select whether the fluid being metered is a liquid or a gas.

### Ctsm

- Not applied
- User entered
- Calculated

This option is used to select whether a correction for temperature on the steel of the meter is made and whether this correction is user entered or calculated.

### Cpsm

- Not applied
- User entered
- Calculated

This option is used to select whether a correction for pressure on the steel of the meter is made and whether this correction is user entered or calculated.

### Interpolation Factor

- Apply

This option is used to apply an interpolation factor.

### Calibration Correction

- Apply

This option is used to apply a calibration correction using C244.

### Spool Temperature Coefficient

- Cubic
- Linear (Approximate)
- Linear (Full)

This option is used to select the temperature coefficient applied for the C

_{tsm}calculation is linear or cubic.

## Calculation

### Correction for temperature on steel of meter

The C_{tsm} is calculated by:

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

α_{sp} |
= | Meter temperature coefficient |

T_{sp} |
= | Meter temperature |

T_{rf} |
= | Meter reference temperature |

### Correction for pressure on steel of meter

The C_{psm} is calculated by:

Where | ||

λ_{sp} |
= | Meter pressure coefficient |

P_{sp} |
= | Meter pressure |

P_{rf} |
= | Meter reference pressure |

### Flow Rate

The flow rate, observed volume or mass, is calculated by :

Where | ||

IntF | = | Interpolation factor |

MF | = | Meter factor |

f | = | Frequency |

KF | = | K-factor (Will be pulses per volume or pulses per mass depending on whether output flow rate is volumetric or mass based) |

C_{tsm} |
= | Correction for temperature on steel of meter |

C_{psm} |
= | Correction for pressure on steel of meter |

Note that correction factors are set equal to one if they are not required for the calculation of flow rate.