Keithley 2520, Service Manual, Page: 24 / 137

1-12 Performance Verification Model 2520 Pulsed Laser Diode Test System Service Manual
Figure 1-5
Resistor mounting and connections
Resistor Edge
View
0.5in
2
Maximum Loop
Area
Resistors
Board
9. Calculate the current using the voltage value and characterized resistance value:
I = V/R. Recalculate reading limits from these values, then verify that the current is
within those limits.
10. Replace the 10
Ω
to 15
Ω
resistor with the characterized 1.2
Ω
to 1.6
Ω
resistor.
11. Repeat steps 5 through 9 for the 5A range using the 1A value shown in Table 1-3
12. For pulse mode verification, change connections as shown in Figure 1-6 , then
repeat the above procedure. for the pulse mode.