AS 3778.6.3-1992

Measurement of water flow in open channels Measuring devices, instruments and equipment - Calibration of rotating element current-meters in straight open tanks

Standards Australia

More details

More info

1 - AS 3778.6.3-1992 MEASUREMENT OF WATER FLOW IN OPEN CHANNELS - MEASURING DEVICES, INSTRUMENTS AND EQUIPMENT-CALIBRATION OF ROT
4 - PREFACE
5 - CONTENTS
6 - 1 SCOPE AND FIELD OF APPLICATION
6 - 2 DEFINITIONS
6 - 3 PRINCIPLE OF CALIBRATION PROCEDURE
6 - 4 DESIGN CRITERIA FOR CALIBRATION STATIONS
6 - 4.1 Dimensions of calibration tank
6 - 4.1.1 Length
6 - 4.1.2 Depth and width
7 - 4.2 Rating carriage
7 - 4.3 Measuring equipment
7 - 4.3.1 Distance
7 - 4.3.2 Time
7 - 4.3.3 Current-meter pulses
7 - 4.4 Ancillary equipment
8 - 5 CALIBRATION PROCEDURE
8 - 5.1 Instructions for calibration
8 - 5.2 Suspension of the current-meter
8 - 5.3 Performance of calibration
9 - 5.4 Evaluation and presentation of results
13 - ANNEX - DETAILS OF SOME RATING TANKS IN USE IN DIFFERENT COUNTRIES

Abstract

Specifies the procedure to be used for the calibration of current-meters, i.e. for the experimental determination of the relationship between water velocity and rate of revolution of the rotating element. It also specifies the type of tank and equipment to be used and the method of presenting the results. The procedure does not take into account any possible differences existing between the behaviour of the current-meter moving in motionless water and that of a fixed current-meter in turbulent flow. It is identical with and has been reproduced from ISO 3455:1976.