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tory inquiry, dynamic display, with software alarm Settings, display
current waveform, maximum value, minimum value and average
value. In addition, the users can read, inquire, store, analyze,
process, sequence historical data and generate and print a fitting
curve and report.
Historical data can saved as .TXT file or .DOC file.
VIII. Measurement Principle
1. Principle of Resistance Measurement
The basic principle of
ETCR
in the measurement of resistance is to
measure the loop resistance, as shown in the figure below. The jaw
part of the Meter is comprised of voltage coil and current coil. The
voltage coil provides excitation signal, and will induce a potential E
on the measured loop. Under the effects of the potential E, the
current I can generate on the measured loop. The Meter will
measure E & I, and the measured resistance R can be obtained by
the following formula.
2. Principle of Current Measurement
The basic principle of
C
+ in the measurement of current is the
same with that of the measurement of resistance, as shown in the
figure below. The AC current on the measured wire, through the
current magnetic loop and coil, can generate a induction
