It's battery powered as well.
The device that WEIGHS will work perfectly every time since it is manufactured to do that.
The device that READS the current flow will also work perfectly every time for the same reason.
The computer processing chip will also do the same.
What you are "adjusting" on these kinds of sales is "the PROGRAM" that evaluates the information flow coming from the device reading the current.
You might also need to adjust the weigh platform ~ that is CENTER it ~ to improve performance.
In any case, the only reason it generates a report at each .2 pounds is the DISPLAY SPACE allocated for that purpose is only so big. You could go 320.1 pounds and read it from above. Unless it's a locked in LQD, or a series of LEDs (kind of an old fashioned way to do things) you might be able to drop a different program on the chip and report out a number in 6 pt type that would give you maybe 50 digits of precision?~?~ whatever you wanted.
This is NOT a mechanical scale and I have no idea where you'd find mechanical scales outside of OHAUS ~ you might want to take a look at this page to check out their currently available inventory. You'll notice immediately that the high precision devices have a COVER ~ to avoid weighing your own breath ~ but the devices targeting heavier weight materials do without it ~ but I assure you they can still have trouble with breath which is why the program on the chip stops counting after so many millions of iterations: >http://us.ohaus.com/us/en/home/products.aspx
Nothing is perfect.