Emerson Daniel 3415 Operation Manual page 53

Configurations
Figure 5-2: Calibration - Meter Factor: None
Wet calibration piece-wise linearization
If the 12-point piece-wise linearization (PWL) wet calibration method is selected, then the
dry- calibration gas flow velocity is calculated as shown in Wet calibration - 12-point piece-
wise linearization.
The inputs to the 12-point piece-wise linearization are the (up to) 12 pairs of volumetric
flow rates and meter factors for each flow direction ([FwdFlwRt1, FwdMtrFctr1], ...,
[FwdFlwRt12, FwdMtrFctr12] for forward flow; [RevFlwRt1, RevMtrFctr1], ..., [RevFlwRt12,
RevMtrFctr12] for reverse flow). Refer to Section 5.3 to configuring these data points using
Daniel MeterLink.
NOTICE
The input flow rates should be entered in descending order (highest first) with their
corresponding meter factors. If these are entered in the wrong order, the meter will still work
but the accuracy may be affected. The meter will not accept negative values, so only positive
values should be entered for both forward and reverse flow rates. If fewer than 12 points are to
be used, the unused flow rate and meter factor pairs should be set to 0 and 1 respectively.
Operations manual 41