How should I verify dosing accuracy on a granular product packaging machine?

• Use ±2% of target weight as the pass line; sample 30 bags, zero out-of-tolerance bags allowed.
• Weigh each bag on a 0.01g scale, record data, and calculate mean deviation and standard deviation.
• Verify the auger/cup filler setpoint matches the HMI displayed value.
• Separately reject and recheck abnormal weights from empty/half bags or seal-jaw film trapping.
• Run at rated speed to confirm dosing accuracy does not degrade as cycle time shortens.