Rockwell Automation 937CU-AISTR-DC1 Strain Gauge Converter Installation Instructions - Manual (Page 34)

Bul. 937
C Strain Gauge Converter Installation Instructions
Characteristic
The settings have the following meaning (for Inverted
→ normal)
Selected setting 20.20 -/+mA
This setting converts the measured value 0 into -20 mA (i.
e. into 20 mA in the case of changed polarity
at the terminals 7 and 8), the span is converted into +20 mA
(terminal 7 -, terminal 8 +), interim values are calculated proportionally.
For values below the measured value 0, the output current decreases linearly to a minimum of
-20.5 mA (-1.25 % of the measurement range). Further underflows cannot be evaluated (output
-20.5 mA). If the span is exceeded, the output current increases linearly to a maximum of +20.5 mA
(101.25 % of the measurement range). Further increases cannot be evaluated (output +20.5 mA).
Selected setting 4 - 20 NE 43
+ 20.5
+ 20.0
0
- 1.25 % 0 100 % = span 101.25 %
mA
Measured
- 20.0
- 20.5
value
20.5
20.0
0
0 100 % = span
≈ 103 %
- 1.25 %
mA
Measured
4.0
3.8
value
32