Current Measurements - Keithley 2000-SCAN-20 Instruction Manual

Current measurements

Although the Model 2000-SCAN-20 is not intended for direct current measurements, on-card
shunt resistors can be installed for channels 1 and 11 to allow for indirect current measurements.
Figure 3-3 shows the typical configuration for current measurements. Refer to
manual for specific information on recommended shunt resistors and their installation.
Figure 3-3
Connections for current measurements
DMM 2000-20
Rear Panel
V
2000-20 2000-SCAN-20 DUT
B. Simplified Equivalent Circuit
The current through each shunt resistor can be calculated as follows:
I = V/R
Where: I = current being determined
V = voltage measured by multimeter
R = shunt resistance value
Instead of manually calculating current, set up a Model 2000-20 mX + b math calculation
function. (Here, m = 1/R and b = 0). The multimeter will then display the actual current value.
Refer to the multimeter manual for details on using math functions.
User-installed
Shunts
2000-SCAN-20
CH 1
Out A A
HI
LO
A
CH 11
DUTs (2)
A. Test Configuration
User-installed
Shunt
A
Operation 3-11
Section 2 of this