Verifying The Current Measure Input (Model 7751/7753 Only) - Keithley SourceMeter 2790 Reference Manual

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Verifying the current measure input (Model 7751/7753 only)

Check the Model 7751/7753 current measure input accuracy by applying an input current
and then measuring the voltage with the Model 2790.
Follow these steps to verify current measure input accuracy:
1.
2.
3.
4.
5.
6.
Figure 16-18
Connections for Model 7751/7753 current measure input verification
Model 7751 or 7753
GND GND HI LO HI
/ INTERLOCK VSOURCE ISOURCE
7751/7753
IN
I/V OUT
LO
Connect the Model 7751/7753 current measure input terminals to the current
calibrator as shown in
Install the Model 7751/7753 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.
Select the Model 2790 DC volts function and enable autorange.
Set calibrator output current to 50μA (7751) or 500μA (7753), and turn on its output.
Using the CLOSE key, close channels 16 and 18. Slot 1 on the Model 7751/7753.
Verify that the Model 2790 voltage reading is within these limits: -9.949V to
-10.051V.
BANK 1
SOURCE SENSE SRC SEN SRC SEN A B
GUARD HI LO HI LO 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
LO
LO I / V IN OUT LO HI HI LO
GUARD I / V SRC SEN SRC SEN A B
BANK 3
Model 2790 SourceMeter
Figure 16-18.
Calibrator (Output DC Current)
OUTPUT HI
OUTPUT LO
®
Switch System Reference Manual
NOTE Be sure calibrator is set for
normal current output.