Guys
The RTD charm control modules at a customer site are configured. -200 to 850 DegC for the XD scale and 0 to 150 DegC for the PV scale. They are configured Direct Independent and the FIELD_VAL (Not FIELD_VAL_PCT). This seams to work nicely with the following exception.
All the AI modules show between 0.4 to 1.0 degrees high across the range.
Has anybody come across this before?
Steve
In reply to Adam Bagosi:
So I'm all wet with my previous comment. Looking at books on line the module should have a 25 degree reference accuracy of 0.25 deg C and you're seeing more than that. Again, I'd be concerned that the device you're using to test may not be calibrated to that level of accuracy unless your client is using NIST calibrated equipment.