Annex C - Glossary

ANNEX C - GLOSSARY

GLOSSARY OF TERMS USED IN THIS CODE OF PRACTICE

As Found The initial calibration recorded on the certificate prior to any routine maintenance or adjustments being carried out to the weighing instrument.
Automatic  An automatic weighing instrument is one which performs a weighing or series of weighings without intervention by an operator in the weighing process or determination of the weighing result.
Calibration A procedure carried out in line with this Code
Calibration Certificate This is a certificate issued in line with Section 7 of this Code
Definitive The final calibration recorded on the certificate following any routine maintenance and /or any adjustments to the weighing machine.
Hysteresis  The difference between the measurements of the weighing system output (indications) for the same applied load, one indication being obtained by increasing the load from zero load the other by decreasing the load from the maximum applied load.
Linearity  The measure of deviation of an instrument as the load applied increases or decreases.
Load Receptor The part of a weighing instrument on or in which the load being weighed is placed.  (Sometimes referred to as goods plate or platform.)
Multi-interval Having a weighing range divided into two or more partial ranges with differing division sizes e.g.
  
    Maximum capacity 30kg
    Range 1   0-6kg in 2g divisions
    Range 2   6-15kg in 5g divisions
    Range 3   15-30kg in 10g divisions
Multiple range Having more than one weighing range for the same load receptor e.g.
  
    Range 1   0-30kg in 10g divisions
    Range 2   0-60kg in 20g divisions
    Range 3   0-150kg in 50g divisions
Non-automatic A non-automatic weighing instrument is one which requires the intervention of an operator during the weighing process and/or for determining the weighing result.
OIML R76-1 The International Recommendation for nonautomatic weighing instruments
Part1: Metrological and technical requirements, Edition 2006 (E),  published by The International Organisation of Legal Metrology (OIML)
OIML R111-1 The International Recommendation for weights of classes E1, E2, F1, F2, M1, M1-2, M2, M2-3, M3 Part 1: Metrological and technical requirements, Edition 2004 (E), published by The International Organisation of Legal Metrology (OIML).
Repeatability This is the ability of an instrument  to indicate the same value (within tolerances) for repeated applications of the same load.
Sensitivity  The ability of mechanical instruments with analogue indication to react to small changes in load values.
Test weights Weights which are subject to a controlled calibration procedure and which are in calibration at the time that the testing is carried out. 
Tolerance  The allowable error of indication of the weighing instrument.


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