NEN EN ISO 6817 : 1995

Committees responsible
National foreword
Foreword to EN ISO 6817
Method
1 Scope
2 Normative references
3 Definitions
4 Symbols and units
5 Theoretical requirements
6 Construction and principle of operation
7 Installation design and practice
8 Equipment marking
9 Calibration and test conditions
10 Uncertainty analysis
Annexes
A (informative) Materials for construction of primary
    devices
B (informative) Bibliography
ZA (normative) Normative references to international
    publications with their relevant European
    publications
Figures
1 Principle of an electromagnetic flowmeter
2 Elements of an industrial electromagnetic
    flowmeter
3 Exploded view of the primary device of an
    electromagnetic flowmeter
4 Principle of pulsed d.c. (bipolar) system
5 Shallow taper entry and exit reducers
6 Cathodically protected pipelines; conductive links
    across flange joints
7 Typical accuracy envelopes

Defines principle and main design features of industrial electromagnetic flowmeters for measuring flowrate of a conductive liquid in a closed conduit running full. Deals with installation, operation, performance and calibration. Does not define safety requirements relating to hazardous environmental usage of the meter nor measurement of magnetically permeable slurries, liquid metals nor usage in medical applications. Covers both a.c. and pulsed d.c. versions.