Surfing the web and found info as to permissable error on Chinese scales. Maybe of interest to some.
Measuring range Permissable error (+/-)
100mm .02mm
200mm .03mm
300mm .04mm
400mm .05mm
500mm .05mm
600mm .08mm
800mm .10mm
1000mm .10mm
2000mmm .20mm
All with a resolution of .01mm