Keithley SourceMeter 2600 Series Reference Manual page 233

Series 2600 System SourceMeters Reference Manual Source-Measure Concepts 8-27
Figure 8-13
Measure only configuration s
m
A. Measure Voltage Only
Note:
B. Measure Current Only
Contact check
When a contact check measurement is being performed, two small current
sources are switched in between the HI and SENSE HI terminals; and the LO and
SENSE LO terminals. By controlling the switches illustrated in Figure 8-14, the
current from these sources flows through the test leads and through the contact
resistance as show. To accurately measure the resulting contact resistance, the
differential amplifier outputs are measured once with the current sources
connected, and again with the current sources disconnected. This allows for
compensation of various offset voltages that can occur.
Return to Section 8 topics 2600S-901-01 Rev. A / May 2006