Tektronix Keithley 2601B-PULSE Reference Manual

Model 2601B-PULSE System SourceMeter Instrument Reference Manual Section 4: Sourcing and measuring
2601B-PULSE-901-01A April 2020 4-49
The 4-wire sensing method, as shown in the following figure (4-wire resistance sensing), minimizes or
eliminates the effects of lead resistance by measuring the voltage across the resistor under test with a
second set of test leads. Because of the high input impedance of the voltmeter, the current through
the sense leads is negligible, and the measured voltage is essentially the same as the voltage across
the resistor under test.
Figure 56: Four-wire resistance sensing
Power measurements
Power readings are calculated from the measured current and voltage as follows:
Where:
P is the calculated power
V is the measured voltage
I is the measured current

Tektronix Keithley 2601B-PULSE Specifications

General

Brand	Tektronix
Model	Keithley 2601B-PULSE
Category	Measuring Instruments
Language	English