Verifying Source-Current Resistance - Keithley SourceMeter 2790 Reference Manual

Model 2790 SourceMeter

Verifying source-current resistance

Check source-current resistance accuracy by connecting accurate resistance values to the
Model 7751/7752/7753 and verifying that Model 2790 resistance readings are within the
specified limits.
Follow these steps to verify resistance accuracy:
1.
2.
Figure 16-19
Connections for Model 7751/7752/7753 source-current
resistance verification
®
Switch System Reference Manual
Using shielded Teflon or equivalent cables in a 4-wire configuration, connect the
Model 7751/7752/7753 Bank 1 terminals to the characterized resistor as shown in
Figure 16-19.
Install the Model 7751/7752/7753 in Slot 1 of the Model 2790, then turn on the
power and allow the unit to warm up for two hours before proceeding. Be sure the
front panel INPUTS switch is set to the REAR position.
7751/7752/7753
Bank 1
J101
SRC HI
Ch 1
SEN HI
SRC LO
Ch 2
SEN LO
A1
B1
SOURCE SENSE
GUARD HI LO HI LO
GND GND HI LO HI LO I / V IN OUT LO
/ INTERLOCK VSOURCE ISOURCE GUARD I / V
Model 7751, 7752, or 7753
BANK 1
SRC SEN SRC SEN A B
HI HI LO LO
BANK 2
SRC SEN SRC SEN A B
HI HI LO LO
HI HI LO LO
SRC SEN SRC SEN A B
BANK 4
HI HI LO LO
SRC SEN SRC SEN A B
BANK 3
Characterized
Test Resistor
(See Text)
16-33