Chapter 1 Overview; Rogowski Coil Current Probe - Iwatsu SS-281A-H Instruction Manual

Chapter 1 Overview

1.1 Rogowski Coil Current Probe

This instrument is a current probe that uses the Rogowski Coil as a
sensor.
The electric current of the place etc. where the terminal and the electric
circuit of the semiconductor device are complicated can be measured by
using this instrument.
The coil of this instrument detects a change in magnetic flux caused by
the current (target to be measured) flowing through the inside of the coil
that forms a closed loop. The change in magnetic flux generates an
electromotive force in the coil. The electromotive force is proportional to a
differential value of the current. The output (electromotive force) of the
Rogowski Coil is the differential waveform of the current. To detect the
current waveform, the waveform is integrated by the main unit of this
instrument (for details, refer to Chapter 3 "Measurement Principle").
This series has nine models, which differ in sensitivity (mV/A), peak
current (A), low frequency cutoff (Hz), and other specifications.
Each model has two types, which differ in operating temperature range of
the Rogowski Coil Sensor; that is, this series has a lineup of fourteen
models.
Connecting the output part of this instrument and an oscilloscope and
other monitoring devices with the BNC cable allows observation of the
current waveform that flows through a target to be measured.
Chapter 1 Overview
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