Reference, Installation, and Operations Manual

Section 6: Meter operation

3-9000-743 Rev S

June 2013

 

 

 

Third-order polynomial

If the third-order polynomial wet calibration method is selected, then the wet-calibration gas flow velocity is calculated as shown in Equation 6-11.

Equation 6-11 Wet calibration - third-order polynomial

VWetCal = C0 + C1VDryCal + C2V2DryCal + C3V3DryCal

where

VWetCal

VDryCal

C0

C1

C2

C3

=wet-calibration gas flow velocity (m/s) (AvgFlow)

=dry-calibration gas flow velocity (m/s) (DryCalVel)

=wet-calibration 0th order coefficient (m/s) (FwdC0 or RevC0)

=wet-calibration 1st order coefficient (dimensionless) (FwdC1 or RevC1)

=wet-calibration 2nd order coefficient (s/m) (FwdC2 or RevC2)

=wet-calibration 3rd order coefficient (s2/m2) (FwdC3 or RevC3)

Note that the meter provides two sets of wet calibration polynomial coefficients - one set for each flow direction.

No wet calibration

If no wet calibration is selected, then the wet calibration gas flow velocity is equal to the dry calibration gas flow velocity.

Calibration

195