5. Auto Measurement
For extensive analysis of the module or sting performance, MP-11 has an auto measurement function to
perform consecutive measurements during the day. The full data set can be displayed as,
Solar irradiance vs. Maximum output power (Pm)
Solar irradiance vs. Open Circuit Voltage (Voc)
Solar irradiance vs. Short Circuit Current (Isc)
6. Quick Sweep Time Measurement
The Solar irradiance and the power consequently generated by the PV module can change within a fraction
of a second. If the sweep time takes too long, the change in the solar irradiance will not be properly taken into
account during the I-V measurement and final STC conversion. The change of solar irradiance has a large
impact with respect to the I-V curve measured by the IV checker with longer sweep time. The MP-11 perfectly
measures the PV module performance.
7. Characteristics Graph Display
LCD on the Main Unit is capable of displaying the following characteristics graphs. It is useful for diagnosing
defects of PV devices.
di/dV-V characteristics which is the I-V characteristics differentiated in first order
Scalable I-V curve graph (x2, x4 to x8) for allowing to check even a slight distortion on the I-V curve
8. Measurement data
The Main Unit is capable of measuring, displaying, analyzing and storing measurement data; all functions that
can be accessed through the front panel key pad. Up to 300 I-V curves can be stored on board, which is
mostly sufficient for one day.
9. Easy report creation
Measurement report file in Excel format, which includes I-V curve result, can be easily created by PC
software after downloading measured data from MP-11. The report format can be customized by the user.
10. Protection Features
When the internal temperature exceeds 50℃, the CPU stops until the temperature becomes less than 45℃
so that measurements cannot be taken.
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