Chapter 1 Overview; Rogowski Coil Current Probe - Iwatsu SS-623S Instruction Manual

Chapter 1 Overview

1.1 Rogwski Coil Current Probe
This instrument is a current probe that uses the Rogowski Coil as a
sensor.
It allows measurement of current in small-current applications, such as
terminal and electric circuit of semiconductor devices, as well as in
high-voltage and large-current applications such as development and
maintenance of infrastructures of the automotive and other industries.
The coil of this instrument detects a change in magnetic flux caused by
the current (object 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 seven 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 length of the Rogowski Coil; that is,
this series has a lineup of fourteen models.
Connecting the output of this instrument and an oscilloscope and other
monitoring devices with the BNC cable allows observation of the current
waveform that flows through an object to be measured.
Chapter 1 Overview
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