Model XP2F
Installation, Operation, and Maintenance Manual
N-XP2F IOM V1.0-4.5
Page 19 of 35
4.4.2.5
DPM Curve Adjust.
4.4.2.5.1
Constant Gain
Description:
Multiplies the calculated flow through the valve by a user entered constant gain factor. This
is used to remove a discrepancy between X35 and another flow meter. It’s best to use the constant gain
factor when there is a consistent percentage difference between the flow meter and the X35 regardless
of valve position.
4.4.2.5.2
Custom DPM Table
Description:
Multiplies the calculated flow through the valve by a user entered constant factor. The user
can enter different gain factors for specific valve positions. This is used to remove a discrepancy
between X35 and another flow meter when the discrepancy varies as the valve opens more.
Figure 4.20
Gain factor applied to calculated
flow when valve is 5% open
Gain factor applied to calculated
flow when valve is 15% open
Figure 4.19
