EKO MP-11 - Main Functions

EKO INSTRUMENTS CO., LTD. I-V Curve Checker MP-11 Instruction Manual Ver.7
Pg. 8
More specific information about the measurement system set up, operating the MP-11, PC software and technical
specifications are written in the each chapter or section of this manual.
4-1. Main Functions
1. Portable
MP-11 housing was designed with “portable” all-in one concept in mind, emphasizing the user-friendliness
and safety at the operation site. The instrument housing is made of electrically insulated resin for safety
purposes. The portable single case I-V tracer offers a space to accommodate the Sensor Unit, cables, and
connectors.
2. Measurements Up To Maximum of 18kW
MP-11 can measure the performance characteristics of PV strings
and arrays up to 18kW. But also single low power modules can be
measured accurately.
3. Sensor Unit
It is designed to provide maximum flexibility for any measurement
situation. The Sensor Unit with built-in data logger can work
independently from the Main Unit without cable connection; it can be
setup and adjusted to the same tilted angle and direction as the
subjected PV module. Since the Sensor Unit has a built-in data logger,
it can be separated from the Main Unit regardless the distance
between MP-11 main unit and best location to perform the radiation
and module temperature measurements. The Solar irradiance can be
measured either with the small pyranometer integrated with the Sensor Unit or through an external radiation
sensor connected to the terminal blocks on the back-side. 2 temperature channels are available to measure
the Modules backside temperature and ambient temperature with T-type Thermocouple
When used remotely, the time stamped irradiance and temperature data can be easily downloaded to the
Main unit when connecting the sensor unit. When the Sensor Unit and the Main Unit are permanently
connected, it is possible to display real time measurement.
4. STC Conversion Compliance to IEC 60891 Standard
MP-11 is capable to perform the STC conversion for crystalline PV modules complying to the IEC 60891 (and
the JIS C8914/8919/8940) by using measured irradiance and module temperature. Therefore, if the module
parameters (Alpha, Beta, Kappa, Rs, module size) for one PV module are set, it automatically calculates the
operating performance as measured under standard test conditions (@ 1000 W/m
2
/ 25ºC) for the total array.
(Note: MP-11 doesn’t have spectrum conversion function to AM1.5.)
Figure 4-1.
Separate Main Unit & Sensor Unit