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Measurement 4-20mA current signal using NI9207

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Measurement 4-20mA current signal using NI9207

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?



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Re: Measurement 4-20mA current signal using NI9207

Probably the software is already doing a conversion step somewhere.  In a 4-20 mA system 4mA is a zero reading from the sensor.

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Accepted by topic author Baili
01-11-2019 10:35 PM

Re: Measurement 4-20mA current signal using NI9207

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。

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