05-20-2015 11:56 PM
I'm using NI-PXI-6239, For measuring prressure I'm using a 4-20mA Pressure transducer.
The way it is connected is
1. +15V of SUPPLY to 1 of TRANSDUCER
2. 2 of TRANSDUCER to A1+ of PXI
3. A1- of PXI to AGND of PXI
4. AGND to 0V of SUPPLY
Cable is shielded, but the amout of noise level is in the range of ±1mA.
Is the connection right? Or what am I missing
05-21-2015 08:14 PM
05-21-2015 08:21 PM
Does the transducer have only a single output? No ground? No differential output?
Bob Schor
05-21-2015 09:55 PM
The pressure transducer is a two wire 4-20 mA current loop, along with a ground(which I connected to the shield of the cable to th source ground).
The NI-PXI takes diffrential I/P, but i've shorted A1- and AGND.
0-10Bar -> 4-20mA