DIN EN 60052 : 2003

INTRODUCTION
1 Scope
2 Normative references
3 Definitions
4 Standard sphere-gap
  4.1 Requirements on shape and surface conditions
  4.2 General arrangement of a sphere-gap for measurement
  4.3 Connections
5 Use of the sphere-gap
  5.1 Condition of the sphere surfaces
  5.2 Irradiation
  5.3 Voltage measurements
6 Reference values in tables 2 and 3
  6.1 Accuracy of values in tables 2 and 3
  6.2 Air density correction factor
  6.3 Humidity correction factor
7 Standard rod-rod gap for measurement of direct voltage
  7.1 General arrangement of a rod-rod gap
  7.2 Reference values
  7.3 Measurement procedure
8 Use of standard air gaps for performance checks of
  approved measuring systems
Annex A (informative) Range of experimental calibrations
        for sphere-gaps
Annex B (informative) Procedure by which the values in
        tables 2 and 3 have been derived from national
        standards and other sources
Annex C (informative) Sources of irradiation
Annex D (informative) Uncertainty and calibration of
        sphere-gaps
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications
Bibliography
Figures
Tables

Voltage measurements by means of standard air gaps (IEC 60052:2002)