PLCarp

I'm beginning to think the same thing. The vendor reached out and said the displays arent calibrated only the output signal is. Working on getting a calibration key to zero out these displays and check to make sure 0 in WC = 12 mA signal. 

Good Idea. I tried this but I got the same value as just using the scale block. At least I can trust negative ranges in the SCL block for other uses now.

Hello,   I'm currently working with a 1769-L19ER-BB1B CompactLogix controller connected to 7 1734-IE8C analog input cards. Into these cards I have about 14 Setra 269 Differential Pressure Transducers, all of which have their own individual display. Our goal is to capture and record the data from the Setras in the PLC, but I am struggling to scale it correctly. I currently am running a series of SCL function blocks to change the raw inputs (3277 - 16383) to the Engineering range (-0.25 - 0.25). The Setras have a standard output range of 4-20 mA and the calibration sheet I have for it matches that (4 mA = -0.25, 20 mA = 0.25 etc.) My issue is the SCL function block outputs are not matching the displays that the Setras have on the sensors. The difference can be somewhat staggering (largest one ive seen is PLC - > 0.045 , Sensor - > 0.003. Any ideas on what I can try to fine tune this scaling?