What are peoples opinions on scales checks and the weights used to test them along with justification. Ive joined a buisness where they use 4 different weights to check each scales, using either one or a combination. You could spend half a day just doing all the combinations! I come from a buisness that just used 2 different weights to check the scales, each corner and centre for each type of weight.
Your thoughts please.......
I go along with most of previous basic ideas. I tend to daily use one checkweight close to intended target and, similar to Brummy, 2-3 checkweights bracketting the target at weekends.
I find most of the IT documents on this topic statistically incomprehensible but the 2 "simple" prodecures below looked reasonably complete and understandable.
From a quick look the quoted weight error tolerances are mostly around +/- 0.1-0.2 % of the reference weights >100g or so (there are some noticeable differences in the two example tables given though).
IMEX the possibilities/tolerances also operationally relate to what you are packing/guaranteeing, eg pieces weighing 5g each may necessitate a rethink.
May also need some flexibility if balance is located underneath an air-conditioner.
SOP 1 - balance calibration.pdf 978.76KB
SOP 2 - balance calibration.pdf 210.76KB