MANUAL SOILING MONITORING SYSTEM Introduction SEVEN Soil Monitoring System measures the soiling due to environmental factors and which causes energy loss. PV Soiling = Energy Loss The Soil Monitoring system, which is suitable for both large areas and roof projects, informs the user of production loses due to soiling. Thus, if the sensor reads 10% as soiling ratio, this means that the energy loss in the PV system 10% as well. SEVEN Manual Soiling Monitoring System consists of two irradiance sensors and an HMI-PLC display. The irradiance values recieved from the irradiance sensors are displayed on HMI-PLC and the PLC calculates the soiling ratio, according to IEC61724-1 standard. One of the sensor is cleaned periodically and the other one is cleaned with the panels at the same time. The sensors measure the irradiance values in W/m2. The measured data is transmitted to the HMI-PLC via RS485 communication. The software calculates the difference between these data and gives the soiling ratio of the PV plant as per IEC61724-1 (Annex C) Standard. The Investors can check the soiling ratio and prevent the power loss by cleaning the panels on time they choose. Seven Sensor Solutions (3S) • [email protected] • www.sevensensor.com

MANUAL SOILING MONITORING SYSTEM EQUIPMENT SPECIFICATIONS Sensor Box It consists of two solar cells in a UV-protected aluminum housing with an output connector and a ventilation plug, measures the irradiance values. The clean sensor must be cleaned periodically the other sensor must be cleaned with the panels at the same time. HMI-PLC Display It includes PLC and HMI for monitoring and recording the Soiling Ratio as per IEC61724-1. The displayed value will be the daily average soiling ratio. This device must be mounted in a way that it wan’t be effected by precipitation and sun. TECHNICAL DRAWINGS...

Asensor solutions Green Yellow Data -Data + PLC Brown White Power Supply TECHNICAL SPECIFICATIONS General Information Soiling Ratio Display Device Kullamm Yontemi 0%... 100% as per IEC61724 Standard Measured once a day Recording and Display Excel/PDF/Graphic Irradiance Sensor Calibration IEC 6904-2:2020 Sensor Box UV resistant, advanced weatherproof box Dimensions and Weight 244 mm x 108 mm x 42 mm (W x L x H), approximately 450g Warranty 2 years limited warranty against manufacturer defects. Seven Sensor Solutions (3S) • [email protected] • www.sevensensor.com

MANUAL SOILING MONITORING SYSTEM TEST&CALIBRATION The soil monitoring system is tested before delievery. Both irradiance sensors are calibrated under class AAA sun similator a per IEC60904-2 by using a calibrated reference cell from ISFH Germany. Each sensor is tested under natural sunlight by using calibrated reference cell from Fraunhofer ISE, Germany. Recomnended periodic calibration is at least 3 years from the installation of the sensor COMMUNICATION & INSTALLATION The communication between the two irradiance sensors and the PLC is done through a Modbus RTU protocol, so that the data collected...

HMI - PLC DISPLAY USAGE• Home Page • Data Recording Page • Device Information The calculated soiling ratio is displayed on this page. The other pages are accessible via this page. SENSOR SOLUTIONS Soiling Ratio ( % ) Data Page Device nformation 1) Status LED : a) Red LED : The soiling sensor and the operator panel are unable to communicate. b) Green LED : The calculation and communication are done correctly. c) Yellow LED : There is undefined data in the calculation time. 2) Soiling Ratio (%) : This ratio value is updated once a day after 3pm Seven Sensor Solutions (3S) • [email protected]...

The system records the soiling raito once an hour. The user can display the records and download them to a USB flash drive. 1) Display Time: Determine the duration of the data to be displayed in the table. 2) Data Table Start Time: Set the start time. The recording data is shown from the start time until the display time. 3) Refresh the Table: The table must be updated to display the recording data after setting the start time and the display time. 4) Download the Data: Upload the displayed data to a USB flash drive. 5) Home Page : Return to the first page. Seven Sensor Solutions (3S) • [email protected]...

1) Software Version: There are two softwares in the system. Therefore they are displayed as X.Y 1) X : The version of the Macro Software in the operator panel. ii) Y : The soiling sensor software version. 2) Hardware Version : There are two hardware in the system. Therefore they are displayed as X.Y i) X : The hardware version of the operator panel. Hardware versions vary according to the 4.7" and 5" screen sizes of the operator panel. ii) Y : The soiling sensor hardware version. 4) Serial Number : Serial number of the soiling sensor includes the production year, the product serial number (AA.BB.CC.DD.FF.EEEE)...

MANUAL SOILING MONITORING SYSTEM D. Download the Data to a USB Flash Drive The recorded data can be downloaded in the form of PDF or Excel Table to a USB flash drive. • • Plug in a USB flash drive into the USB port on the back of the HMI-PLC display Go to Data Recording Page. Set the time interval & start time Home Page Home Page Seven Sensor Solutions (3S) • [email protected] • www.sevense

MANUAL SOILING MONITORING SYSTEM • Refresh the page to list the data in the table. Home Page icon after the data has been listed. Home Page Click on forms options, PDF or CSV (Excel Table) that appears on the screen. Home Page Seven Sensor Solutions (3S) • [email protected] • www.sevensensor