Keithley 2701 - Page 131

Model 2701 User’s Manual Basic DMM Operation 3-27
Figure 3-10
Constant-current method to measure ohms (100Ω to 1MΩ ranges)
DUT
V
ISOUR
VMEAS
Input Hi
Input Lo
2701
DUT
V
ISOUR
VMEAS
Input Hi
Input Lo
2701
Sense Hi
Sense Lo
A) 2-wire ohms (Ω2) measurements (100Ω through 1MΩ ranges)
R
DUT =
VMEAS
ISOUR
RDUT =
V
MEAS
ISOUR
B) 4-wire ohms (Ω4) measurements (100Ω through 1MΩ ranges)