Re: shift in RTD Reading

I guess the noise source may be too noisy.  We have used other VFD's and 
I never have seen anything like this.  WRT using 4-20 mA xmitters, we 
have tried this too, and the same problem is seen, ie the temperature 
drops a few degrees.  we also use 4-20 mA pressure transducers too. 
these show the same symptoms, ie the pressure reading drops by a few 
psi. The problem is there whether it is a low level RTD reading, or a 
'high' level 4-20 mA signal.

Again, thanks for the insight.

DanW
> My opinion- put some industrial grade 4-20mA transmitters in there,
> and toss those RTD cards into the nearest dumpster. 
>
> Best regards, 
> Spehro Pefhany