IE2C / IE4C cards

I was wondering why are the default engineering units:
High: 16383
Low: 3277

Why wouldn't it be
High: 20000
Low: 4000

And what does adjusting these values actually do?

14 bits logic 2**14 = 16384
4000 - 20000 , 4000 = 20000*0.2 or 20%
3277 - 16384 , 3277 = 16384*0.2 or 20%

so what would changing these from 3277 , 16384 to
4000 , 20000 do?

16383 = 16#3fff = 2#0011_1111_1111_1111

If you are running a 14-bit A/D converter, the maximum value is 16383, so 1/5 of that is 3277.

These modules have a 16-bit A/D converter, so I think the default max/min engineering units are meant for compatibility with legacy modules that run in 14-bit mode. 3277/16383 were the min/max for the popular 1746-NI4 analog module in 4-20 mA mode, for example.

I prefer to give up some precision in favor of readability, so 4000 to 20000 is how I set mine up so I can compare the raw values with a multi-meter. I explicitly scale to real "engineering units" like feet/minute or RPM in my controller code.

thanks!

Yea I typically put mine to 4000 - 20000 but was just wondering, I do it that way so what I see should match what the unit says it is doing.
Easier to troubleshoot with people. but yes I also instantly scale it to real units Lbs / Temp / ect..