Metrel MI 3109 EurotestPV Lite: Photovoltaic System Tester
Instrument for testing photovoltaic systems and low-voltage installations
Overview
The MI 3109 EurotestPV Lite is an instrument designed for testing photovoltaic power plants. It enables all required electrical tests as per SIST/EN 62446, as well as more advanced measurements such as I-V characteristic measurement of photovoltaic modules and strings, calculation of results to STC values, measurement of DC and AC power from inverters, and efficiency measurement of individual components of the photovoltaic (PV) system.
The MI 3109 EurotestPV Lite is optimized for testing PV power plants and features an automatic measurement sequence function. With a single button press, it executes a sequence of tests required by SIST/EN 62446.
Measuring Functions
Photovoltaic Installations
Measurements on the DC side of PV installations:
- Voltage, current, power, energy.
- Uoc (open-circuit voltage) and Isc (short-circuit current).
- I-V characteristic of PV module and string.
- Irradiance and module temperature.
Measurements on the AC side of PV installations:
- Voltage, current, power.
- Calculation of PV module, inverter, and entire PV system efficiencies.
Electrical Installations
- Insulation resistance (EN 61557-2) up to 1000 V.
- Continuity of protective conductors and equipotential bonding with 200 mA current (EN 61557-4).
- Continuity of protective conductors and equipotential bonding with 7 mA current.
Key Features
- Insulation and I-U Curve Measurements in One Instrument: The MI 3109 EurotestPV Lite allows insulation testing with voltages up to 1000 V and I-U curve measurements for evaluating PV module performance and fault detection.
- Autotest: Performs the entire set of tests according to EN 62446 for PV modules with a single button press.
- Insulation Resistance Measurement: Measures insulation resistance between the positive output and earth, and between the negative output and earth.
- Open Circuit Voltage Measurement.
- Short Circuit Voltage Measurement.
- STC Value Calculation: Measured current and voltage values are converted to Standard Test Conditions (STC) values according to environmental conditions, enabling comparison of results from multiple measurements even if taken under different conditions.
- Efficiency Calculation: Utilizes 2 voltage and 2 current channels for simultaneous measurement of AC and DC parameters.
- PV Remote Unit: An optional unit for simultaneous measurement of solar irradiance and PV module temperature.
- Graphical I-U Curve Display: Displays the module's I-U curve on the instrument's LCD.
- Memory: Can store up to 1800 test results and up to 500 graphical results in internal memory.
- Bluetooth Communication: Connects with Android mobile devices via an optional Bluetooth dongle.
- Android Application: EuroLink PV app for data management.
- Software: EuroLink PRO software for recording, uploading, viewing, analyzing, and printing test results.
Applications
- Initial testing.
- Periodic testing.
- Verification and fault finding in photovoltaic installations.
- Power and efficiency measurements (AC and DC).
Standards
Functionality
- IEC/EN 61557 series
- IEC 62446 (photovoltaics)
- IEC 61829
EMC
- EN 61326
Safety
- EN 61010-1
- EN 61010-2-030
- EN 61010-031
- EN 61010-2-032
Technical Specifications
Measurements of Photovoltaic Installations
| Function | Measuring Range | Accuracy |
|---|---|---|
| Voltage | 0 VDC ... 999 VDC 0 VAC ... 999 VAC |
±(1% of reading + 5 digits) |
| Current | I-V m.: 0.00 A ... 15 ADC Panel m.: 0.0 mA ... 300 ADC Inverter m.: 0.0 mA ... 300 AAC |
±(1.5% of reading + 3 digits) |
| Power | I-V m.: 0 ... 15 kW Panel m.: 0 ... 200 kW |
±(1% of reading + 2 digits) |
| I/V Characteristic | 1000 V / 15 A / 15 kW | ±(1% of reading + 5 digits) |
| Irradiance | 0... 2000 W/m² | ±(1.5% of reading + 3 digits) |
| Temperature | -10 °C ... + 85 °C | ±(2.5% of reading + 6 digits) |
The instrument ensures accurate measurement results, fully in accordance with technical specifications, for modules with efficiency up to 20%.
Measurements of Electrical Installations
| Function | Measuring Range | Accuracy |
|---|---|---|
| Insulation Resistance (EN 61557-2) | U = 50, 100, 250 VDC: R: up to 199.9 MΩ U = 500 VDC, 1 kVDC: R: up to 999 MΩ |
±(5% of reading + 3 digits) |
| Resistance, 200 mA (EN 61557-4) | 0.00 Ω ... 1999 Ω | ±(5% of reading + 3 digits) |
| Resistance, 7 mA | 0.0 Ω ... 1999 Ω | ±(3% of reading + 3 digits) |
| Basic Data | Basic Unit | Remote Unit |
| Graphical display with backlight | 128 x 64 pixels | 128 x 64 pixels |
| Power supply | 6 x 1.2 V NiMH batteries, type AA | 6 x 1.2 V NiMH batteries, type AA |
| Overvoltage category | 1000 V DC / CAT II 600 V / CAT III; 300 V / CAT IV | |
| Type of protection | Double insulation | |
| COM port | RS232 and USB | RS232 |
| Dimensions | 230 x 103 x 115 mm | 140 x 230 x 80 mm |
| Weight | 1.3 kg | 1.0 kg |
PV System Parameters Diagram
A diagram illustrates the flow of energy in a PV system, showing the solar module (DC input), inverter (DC/AC conversion), and AC output to the main consumer unit and utility meter. Key parameters like Uoc, Isc, Pmax, and I-V curve are indicated at the module level, while power and efficiencies are measured at the inverter output.
Ordering Information
MI 3109 ST
- MI 3109 EurotestPV Lite instrument
- Carrying bag
- Universal PV measurement lead, 3 x 1.5 m
- PV continuity measurement lead, 2 x 1.5 m
- Measurement probes, blue, red, green, 3x
- Crocodile clips, blue, red, green, 3x
- PV MC3/4 adapters
- Power supply adapter + 6 NiMH rechargeable batteries, type AA
- USB cable
- RS-232-PS/2 cable
- Set of carrying straps
- PC SW EuroLink PRO
- Short user manual
- User manual and guide on CD
- Calibration certificate
MI 3109 PS
- Carrying bag
- PV Remote unit
- Pyranometer
- Temperature sensor
- PV Safety Probe
- EuroLink PRO Plus license
Optional Accessories
| Order No. | Description |
|---|---|
| A 1378 | EurotestPV Remote unit |
| A 1384 | PV Safety Probe |
| A 1385 | PV test cable with fuses |
| A 1427 | PV Measurement cell |
| A 1400 | Temperature probe |
| A 1018 | Current clamps (low range, leakage current) |
| A 1391 | AC/DC Current clamps |
| A 1105 | Barcode scanner |
| A 1292 | Upgrade EuroLink PRO to EuroLink PRO Plus |
| A 1436 | Bluetooth dongle |
Manufacturer Information
METREL D.O.O.
Measuring and regulating equipment
Ljubljanska 77, SI-1354 Horjul, Slovenia
T (0)1 75 58 200
metrel@metrel.si
www.metrel.si
Note! Catalog photos may differ from the ordered set at the time of delivery. Metrel reserves the right to make technical changes without prior notice.
