3410 Series Gas Ultrasonic Meters Operations Manual
Section 5: Calibrate and configure the meter
3-9000-777 Rev E
January 2018
Wet calibration piece-wise linearization
45
Equation 5-3 Wet Calibration - 12-Point Piece-wise linearization
where
The linear meter factor is determined by the PWL inputs, the flow direction, and the dry-
calibration gas flow velocity. If set to Piece-wise Linear” then the piece-wise linearization flow
rate and meter factor parameters are used to calculate the meter factor to be applied.
Figure 5-3 Calibration - Meter Factor: Piecewise linearization
=
wet-calibration gas flow velocity (m/s) (
AvgFlow
)
=
dry-calibration gas flow velocity (m/s) (
DryCalVel
)
=
linear meter factor (dimensionless) (
LinearMeterFctr
)
V
WetCal
VDryCal LinearMeterFctr
¥
=
V
WetCal
V
DryCal
LinearMeterFctr
