01-11-2019 01:21 AM
Hi,I measuremented 4-20mA current signal using CompactRIO NI9063 RT-controller and NI9207 module。The attachment are the Vi and the Circuit diagram。But I read the current value is error(actual signal is 4mA,but the Vi indicate is 0.0039),Anyone know the reason?
Solved! Go to Solution.
01-11-2019 02:07 AM - edited 01-11-2019 02:08 AM
Probably the software is already doing a conversion step somewhere. In a 4-20 mA system 4mA is a zero reading from the sensor.
01-12-2019 12:35 AM
Thank you!
I have solved the problem。Beasue NI9207 read the signal unit is A, so the data need to multiply by 1000 to convert mA。