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6.Measurement Principle
This instrument adopts the principle of current and voltage
method, also known as four-wire method test technology. The block
diagram of principle is shown in Figure 2.
Fig. 2 Test schematic diagram
By the current source through the "I+, I-" two ports (also known as
the I-port), to supply the measured resistance Rx current, the size
of the current has ammeter I read out, Rx voltage drop "U+, U-" two
ports (also known as V-port) take out, by the voltmeter V read out.
Through the measurement of I and U, the resistance of the tested
resistance can be calculated.
7.Operating Method
1. Connect according to the figure three wiring method.
