Tektronix KEITHLEY SourceMeter 2450 User Manual page 91

Section 9: Measuring I-V characteristics of solar cells Model 2450 Interactive SourceMeter® Instrument User's Manual
In the example above, the instrument is programmed to display custom text on the User Display
screen using the display.screen and display.settext commands. After the test is finished,
the display will indicate the maximum power (P ), the short circuit current (I ), and the open circuit
max SC
voltage (V ), as shown in the figure below.
OC
Figure 46: Example of user-defined text on the USER DISPLAY screen
After the code is executed, the measured current, voltage, and calculated power are displayed in the
Instrument Console of Test Script Builder. The data can be copied and pasted into a spreadsheet,
® ®
such as Microsoft Excel , for graphing and further analysis. The results of graphing the data in an
Excel spreadsheet are shown in the figure below. Notice that the test on the solar cell was executed
with light (light ON) and in the dark (light OFF).
Figure 47: Solar cell I-V characteristics generated with and without light
9-8 2450-900-01 Rev. A / June 2013