Watlow PPC-2000 - Manual (Page 122)

Chapter 3: Operating with AnaWin 3 PPC-2000 User’s Guide
98 Watlow Anafaze Doc.# 30002-00 Rev 2.3
Setting up User Selectable Linear Inputs
The Input Type and linear scaling fields (Input Signal Lo, Input
Signal Hi, PV Lo and PV Hi) appear on the Inputs spreadsheet.
Linear input types are used with sensors whose signals are
straight line (linear) functions of the quantity being measured.
For example, a sensor that supplies a voltage signal
proportional to the pressure it detects would use one of the
linear input types and the signal would be converted to a
process variable using the scaling values set on the Inputs
spreadsheet. To define the conversion function, the user
specifies two points on the line. See Figure 3.3.
Figure 3.3 Linear Input Example
PV Lo
PV Hi
Input Signal Lo
Sensor Input
Input Signal Hi 10V
Process
Variable
20 PSI
0 PSI
0 V