Martel Electronics 135 - Manual (Page 58)

Calibration of mV to Current Converters
This example assumes a 10 to 50 mV input and a 4 to 20 mA output.
1.
Connect as shown in Figure 3.
2.
Select mA input.
3.
Select mV output.
4.
Enter 10 mV and adjust converter zero for 4 mA output.
5.
Enter 50 mV and adjust converter span for 20 mA output.
6.
Repeat steps 4 and 5 until both zero and span are within desired
tolerance.
Figure 3
Application Notes 130/135 54
mV/Current
Converter
OUTPUT
- +
INPUT
- +
Input 10-50 mV
Output 4-20 mA