ISO 20339:2017 pdf download – Non-destructive testing — Equipment for eddy current examination — Array probe characteristics and verification. 6 Measurement of electrical and functional characteristics of an array probe 6.1 Electrical characteristics 6.1.1 General The electrical characteristics alone do not define the probe characteristics in its application. The methods and measuring instruments given below are for guidance; other equivalent methods and instrumentation can be used. When characteristics are measured using modelling, this shall be clearly stated. 6.1.2 Measurement conditions Array probes (surface probes and coaxial probes) are in most cases specific to one application. They are delivered with a...