BS 7965:2000
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
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The selection, installation, operation and calibration of diagonal path transit time ultrasonic flowmeters for industrial gas applications
Hardcopy , PDF
10-31-2009
English
04-15-2000
Committees responsible
Foreword
1 Scope
2 Normative references
3 Symbols and abbreviations
4 Selection
5 Installation recommendations
6 Operational consideration
7 Ultrasonic flowmeter certification
Annex A (informative) Uncertainty calculation for
ultrasonic flow meters
Annex B (informative) Performance specification
Annex C (informative) Derivation and correction of flow
measurement errors
Bibliography
Figure 1 - General ray geometry for transit time velocity
measurement
Figure 2 - Intrusive a) and non-intrusive b) transducer
designs
Figure 3 - Variations in path configuration
Figure 4 - Some typical cross-sectional acoustic path
configurations
Figure 5 - Performance specification summary
Figure B.1 - Performance specification for class 1 meters
Figure B.2 - Performance specification for class 2 meters
Figure B.3 - Performance specification for class 3 meters
Figure B.4 - Performance specification for class 4 meters
Figure C.1 - Un-corrected and WME-corrected flow calibration
data plot for 200 mm diameter USM
Table 1 - USM Classification
Table 2 - Installation criteria
Table 3 - Internal diameter tolerances
Table 4 - Uncertainty tolerances for beam path lengths
Table 5 - Nominal test flow rates
Table C.1 - Flow calibration data table for 200 mm diameter
USM
Table C.2 - Flow weighted mean error calculation summary for
200 mm diameter USM
Table C.3 - "WME-corrected" flow calibration data summary
for a 200 mm diameter USM
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