BS 6647:1985

National foreword
Committees responsible
Section one - General
1 Scope
2 Object
3 Conditions of use
3.1 Range of operating conditions
3.2 Reference conditions
4 General definitions
4.1 Transfer characteristic
4.2 Scale factor
4.3 Deflection coefficients
4.4 Nominal values of the deflection coefficients
4.5 Non-linearity
4.6 Instability
4.7 Measuring area or scale
4.8 Rated deflection or rated scale
4.9 Effective screen areas or effective scale
4.10 Warm-up time
4.11 Absolute and relative error
4.12 Individual error and overall error
5 Performance characteristics
6 Input characteristics
Section two - Oscilloscopes for impulse tests
7 General
7.1 Writing speed
7.2 Step response and rise time
7.3 Oscilloscope frequency response
8 Accuracy requirements
8.1 General
8.2 Requirements on transfer characteristics
8.3 Requirements on the accuracy of the calibration
8.4 Requirements on linearity
8.5 Requirements on stability
8.6 Requirements on ripple
8.7 Requirements on the accuracy of the reading
      process
8.8 Limits on interference
9 Record of performance
10 Recommended procedure for oscilloscope
      measurements
Section three - Peak voltmeters for impulse tests
11 General
12 Accuracy requirements
12.1 General
12.2 Requirements on transfer characteristics
12.3 Requirements on accuracy of the calibrators
12.4 Requirements on linearity
12.5 Requirements on stability
12.6 Requirements on storage time
12.7 Limits on interference
13 Record of performance
14 Recommendations for measurements with peak
      voltmeters
Appendices
A Special recommendations for oscilloscopes
B Precautions in the use of general purpose
      instruments
C Procedure for performance tests
D Interference tests
Figures

Gives requirements for analogue oscilloscopes and peak voltmeters used for measurements during tests with high impulse voltages and high impulse currents. Covers the specific characteristics, tests and calibrations required to meet the measuring accuracies specified in BS 923:Part 3.

This standard is applicable to analogue oscilloscopes and to peak voltmeters used for measurements during tests with high impulse voltages and high impulse currents. It covers the specific characteristics and calibrations required to meet the measuring accuracies specified in IEC Publication 60-3: High-voltage Test Techniques, Part 3: Measuring Devices. It does not cover general instrument requirements because they are dealt with in IEC Publication 351-1: Expression of the Properties of Cathode-ray Oscilloscopes, and in IEC Publication 359: Expression of the Functional Performance of Electronic Measuring Equipment.