NEN EN 45501 : 2015

Cooperating organizations
National foreword
Foreword
Introduction
T. Terminology
T.1 General definitions
T.2 Construction of an instrument
T.3 Metrological characteristics of an instrument
T.4 Metrological properties of an instrument
T.5 Indications and errors
T.6 Influences and reference conditions
T.7 Performance test
Alphabetical list of the terms which are defined in the
terminology
1. Scope
2. Principles of the European Standard
2.1 Units of measurement
2.2 Principles of the metrological requirements
2.3 Principles of the technical requirements
2.4 Application of requirements
3. Metrological regulation
3.1 Principles of classification
3.2 Classification of instruments
3.3 Additional requirements for a multi-interval
      instrument
3.4 Auxiliary indicating devices
3.5 Maximum permissible errors
3.6 Permissible differences between results
3.7 Verification standards
3.8 Discrimination
3.9 Variations due to influence quantities and time
3.10 Type examination tests
4. Technical requirements for a self- or semi-self-
      indicating instrument
4.1 General requirements of construction
4.2 Indication of weighing results
4.3 Analogue indicating devices
4.4 Digital indicating and printing devices
4.5 Zero-setting and zero-tracking devices
4.6 Tare device
4.7 Present tare device
4.8 Locking positions
4.9 Auxiliary verification devices (removable or fixed)
4.10 Selection of weighing ranges on a multiple range
      instrument
4.11 Devices for selection (or switching) between
      various load receptors - load transmitting devices
      and various load measuring devices
4.12 Requirements for load cells
4.13 'Plus' and 'minus' comparator instrument
4.14 Instrument for direct sales to the public
4.15 Additional requirements for an instrument for
      direct sales to the public with price indication
4.16 Instrument similar to one normally used for direct
      sales to the public
4.17 Price-labelling instrument
5. Requirements for electronic instruments
5.1 General requirements
5.2 Acting upon significant faults
5.3 Functional requirements
5.4 Performance and span stability tests
6. Technical requirements for a non-self-indicating
      instrument
6.1 Minimum sensitivity
6.2 Acceptance solutions for indicating devices
6.3 Conditions of construction
6.4 Simple equal arm beam
6.5 Simple 1/10 ratio beam
6.6 Simple sliding poise instrument (steelyard)
6.7 Roberval and Beranger instruments
6.8 Instrument with ratio platforms
6.9 Instrument with a load-measuring device with
      accessible sliding poises (of the steelyard type)
7. Marking of an instrument
7.1 Descriptive markings
7.2 Verification marks
7.3 Additional inscription
8. Certification procedure
8.1 Type examination
8.2 Verification of conformity to type
Annex A (normative) Testing procedures for non-automatic
weighing instruments
A.1 Administrative examination
A.2 Compare construction with documentation
A.3 Initial examination
A.4 Performance tests
A.5 Influence factors
A.6 Endurance test
Annex B (normative) Additional tests for electronic
instruments
B.1 General requirements for electronic instruments
      under test (EUT)
B.2 Performance tests for influence factors
B.3 Performance tests for disturbances
B.4 Span stability test
Annex C (normative) Test procedure for immunity to
radiated radio-frequency electromagnetic fields
Bibliography

Acts as a specification for metrological aspects of non-automatic weighing instruments. Includes the following sections: technical requirements for a self- or semi-self-indicating instrument; requirements for electronic instruments; technical requirements for a non-self-indicating instrument; marking of an instrument.