Rockwell Automation 937CU-AITXF-DC1 Transmitter Supply Converter Installation Instructions - Manual (Page 19)

17
Bul. 937C Transmitter Supply Converter Installation Instructions
•
y = m x + n
• Conversion factor = rise in the graph
m = (y2 – y1) / (x2 – x1) m
= (100 – 0) / (20 – 0) = 5
• Zero point = intersection point with the x-axis on the graph, with the condition that the physical
The zero point can be calculated as follows: n =
y – m x
n = -100 – 5 x 0 = -100
y = m x + n
x = (y – n) / m
x = (0 + 100) / 5 = 20
1 1 1 1 1 2 1 1 1 10
-1
50
100
150
200
-200
-150
-100
-50
-4 -3 -2
11 12 13 14 15 16 17 18 19 20
x [mA]
y [°C]
Editing device data: Input
Example 2: selected unit °C, 0 °C ... -100 °C is to correspond to 20 mA ... 0 mA
Linearization