Keithley SourceMeter 2460 User Manual page 77

Model 2460 Interactive SourceMeter® Instrument User's Manual Section 8: Measuring I-V characteristics of a solar panel
7. Press the MENU key.
8. Under Measure, select Settings.
9. Select the button next to Sense Mode and select 4-Wire Sense.
10. Press the MENU key.
11. Under Source, select Sweep.
12. Set the Start level to 0 V and select OK.
13. Set the Stop level to 20 V and select OK.
14. Select the button next to Definition and select Number of Points.
15. Select the button next to Points, enter 115, and select OK.
16. Swipe the SWEEP SETTINGS screen until you see Source Limit.
17. Select the button next to Source Limit, enter 4 A, and select OK.
18. Select the button next to Delay and select Specify Delay Manually.
19. Enter 50 ms and select OK.
20. Select Generate. This sets up a trigger model for the sweep.
21. Press the MENU key.
22. Under Measure, select Data Buffers.
23. Select defbuffer1 to open the Settings for defbuffer1 dialog box.
24. Select Clear Buffer, select Yes, and select OK.
25. Press the MENU key.
26. Under Views, select Graph.
27. Press the TRIGGER key to initiate the trigger model. The output turns on and a RUN indicator is
visible at the top of the screen while the sweep is running.
28. Press the trigger key again to repeat the sweep.
The following figure shows an example of solar panel I-V measurements on the front-panel graph.
Note that the current is negative on the graph because the Model 2460 is sinking current.
Figure 45: Example of solar panel measurements on the Model 2460 front-panel graph
2460-900-01 Rev. A / September 2014 8-5