Currently, one customer complain that our multi-functional counting scale JCA not count the screws correctly.

We asked for the videos, after checking we find that they sampling too few pcs, we suggest them at least 50pcs, ideally 100pcs.

and we take below video for they reference, but they doubt why the unit weight changes? not keep the same after sampling.

We told them that our counting scales have below advanced function of ACAI to make the counting result more accurate.

Automatic Counting Accuracy Improvement (ACAI) results in a more accurate count by increasing the reference weight without the need to count additional parts. A higher reference weight is important when there is a risk of inconsistent piece weights or if the reference weight is close to the minimum. ACAI uses an initial averaging unit weight to count additional weight that is placed on the scale. After a few seconds, the scale gives a beep as a new higher reference weight is used to recalculate the averaging unit weight. The process can be repeated as long as the additional weight is less than the less than previous reference weight. Once the limit is exceeded ACAI is turned off.

pls refer to below demo