A.8 Measuring instruments
A.8.1
The measurements of the quantity of product in prepackages, the density of liquid products, the weight of packaging materials and other relevant measurements should be carried out by means of measuring instruments that are at least as accurate as the requirements prescribed in OIML R 87:2016 for instruments used to control prepackages by legal metrology officials (inspector’s reference test). The minimum requirements in A.8.1 to A.8.4 are applicable.
A.8.2
Measurement results should be traceable to the SI.
A.8.3
Calibration frequencies for instruments that have the possibility of becoming inaccurate due to wear and tear should be calibrated at intervals that will ensure their required accuracy at all times but calibration should take place at least every 12 months for measuring instruments excluding glass measures and simple fixed length measures (e.g. tape measures).
A.8.4
In-service validation should be carried out by the packer as deemed necessary to ensure continued accuracy between calibrations.