Metrel MI 3108 EurotestPV: Instrument for Testing PV Systems and Low-Voltage Installations

Product Overview

The Metrel MI 3108 EurotestPV is a combined instrument designed for testing photovoltaic (PV) systems and low-voltage installations. It supports all installation tests according to EN 61557 standards and also performs essential tests and measurements on PV systems, including those required by EN 62446. The instrument can measure I-U characteristics, calculate STC values, and measure power and energy on both the DC and AC sides of the inverter. It is built to operate safely in demanding conditions with DC voltages up to 1000 V and currents up to 15 A, featuring a safety probe for secure disconnection.

Key Features and Functions

PV Installations

DC Side Measurements: Voltage, current, power, energy, open-circuit voltage (Uoc), short-circuit current (Isc), I-V characteristic of PV modules and strings, module illumination, and temperature.
AC Side Measurements: Voltage, current, power, calculation of efficiencies for PV modules, inverters, and the entire PV system.
STC Value Calculation: Measures current and voltage values are converted to Standard Test Conditions (STC) based on environmental conditions, enabling comparison of results from different measurement conditions.
Efficiency Calculation: Utilizes two voltage and two 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 Display: Shows the module's I-U curve on the instrument's LCD.

Electrical Installations

Insulation Resistance: With DC voltage.
Protective Conductor Continuity: PE continuity testing.
Installation Impedance: Loop and line impedance measurements.
Loop Impedance without RCD Tripping: Features a Trip Lock function for impedance testing without triggering RCDs.
RCD Testing: Supports testing of RCD types AC, A, and B. Includes an RCD Auto function for faster testing.
Earth Resistance: Supports 3-wire earth resistance measurement.
AC Current Measurement: Measures load and leakage current (TRMS).
Voltage and Frequency: TRMS voltage, frequency, and phase sequence measurement.
Power and Harmonics Analysis: Measures power, energy, and harmonics up to the 11th harmonic for single-phase power.

Data Management and Connectivity

Memory: Stores up to 1800 test results and 500 graphical results.
Bluetooth Communication: Connects with Android mobile devices via an optional Bluetooth plug-in.
Android Application: EuroLink PV app for data management.
PC Software: EuroLink PRO software for recording, uploading, viewing, analyzing, and printing test results.

Applications

Testing and fault finding in photovoltaic installations.
Power and efficiency measurements (AC and DC).
First and periodic testing of domestic and industrial single and three-phase electrical installations.

Standards Compliance

Functional: IEC/EN 61557 series, IEC 62446 (photovoltaics), IEC 61829.
Other Testing Standards: BS 7671, EN 61008, EN 61009, EN 60364-4-41, AS/NZ 3017.
EMC: EN 61326.
Safety: EN 61010-1, EN 61010-2-030, EN 61010-031, EN 61010-2-032.

Technical Specifications

PV Installation Measurements

Function	Measuring Range	Accuracy
Voltage	0 VDC ... 999 VDC 0 VAC ... 999 VAC	±(1% of reading + 2 digits)
Current	I-V m.: 0 VDC ... 999 VDC Panel m.: 0.0 mA ... 300 ADC Inverter m.: 0.0 mA ... 300 AAC	±(1.5% of reading + 3 digits)
Power	I-V m.: 0.00 A ... 15 ADC Panel m.: 0 ... 999 kW I-V m.: 0 ... 14.99 kW	±(1% of reading + 2 digits)
I/U Characteristic	1000 V/15A / 15 kW	±(1% of reading + 2 digits)
Irradiance	0 ... 1750 W/m²	±(1.5% of reading + 3 digits)
Temperature	-10 °C ... +85 °C	±(1% of reading + 2 digits)

The instrument provides accurate measurement results, fully compliant with technical specifications, for modules with efficiency up to 20%.

Electrical Installation Measurements

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)
Loop Impedance (EN 61557-3)	0.0 Ω ... 1999 Ω	±(5% of reading + 3 digits)
Short-Circuit Loop Impedance (EN 61557-3)	0.0 Ω ... 1999 Ω	±(5% of reading + 5 digits)
Voltage	0 VAC ... 550 VAC	±(2% of reading + 2 digits)
Frequency	0.00 Hz ... 499.9 Hz	±(0.2% of reading + 1 digit)
Phase Sequence (EN 61557-7)	1-2-3 or 3-2-1	-
RCD Testing (EN 61557-6)	IΔN: 10 mA, 30 mA, 100 mA, 300 mA, 500 mA, 1 A Uc: 0.0 V ... 99.9 V Tripping Time: 0 ms ... 40 ms Tripping Current: 0.2 x IΔN ... 2.2 x IΔN	(-0% / +15%) of reading ±1 ms ±0.1 x IΔN
Earth Resistance (EN 61557-5)	0.00 Ω ... 9999 Ω	±(5% of reading + 5 digits)
Energy	0.000 Wh - 1999 kWh	-
Harmonics	Up to the 11th	-

General Data

Parameter	Main Unit	Remote Unit
Graphical Display	128 x 64 pixels with backlight	128 x 64 pixels with backlight
Power Supply	6 x 1.2 V NiMH AA batteries	6 x 1.2 V NiMH AA batteries
Overvoltage Category	CAT II/1000 VDC; CAT III / 600 V; CAT IV/300V	-
Protection Type	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 connection of PV system components: Solar Module (DC Input) connected to a DC Disconnect, which then connects to the Inverter (DC/AC Inverter). The Inverter's AC Output is connected to the Main consumer unit. Measurements are shown for Uoc, Isc, PmpP, and I-V curve on the DC side, and Power on the AC side. Irradiance (W/m²) and Cell Temperature (°C) are external inputs affecting the Solar Module.

Ordering Information

MI 3108 ST (Standard Kit)

MI 3108 EurotestPV Instrument
Carrying bag
Schuko test lead
Universal PV measuring lead, 3 x 1.5 m
Test probe, blue, red, green, black, 4x
Alligator clip, blue, red, green, black, 4x
PV Safety Probe
MC3/4 PV adapters
Pyranometer
Temperature probe
Power adapter + 6 NiMH rechargeable batteries, AA type
USB cable
RS-232 - PS/2 cable
Carrying straps set
PC SW EuroLink PRO
Short user manual
User manual and handbook on CD
Calibration certificate

MI 3108 PS (PV System Kit)

PV Remote Unit
Power adapter + 12 NiMH rechargeable batteries, AA type
Test lead with probe
EuroLink PRO Plus license

Optional Accessories

Photo	Order No.	Description
A 1378	EurotestPV Remote Unit
A 1314	Schuko test adapter
A 1401	Test lead with 3-wire probe
A 1018	Current clamp (low range, leakage current)
A 1391	AC/DC Current Clamp
A 1105	Barcode reader
A 1431	EuroLink Android
A 1436	Bluetooth dongle
S 2026	Earth resistance measuring set, 3-wire, 20 m
S 2027	Earth resistance measuring set, 3-wire, 50 m

Manufacturer Information

METREL D.O.O.
Measuring and regulatory equipment
Ljubljanska 77, SI-1354 Horjul, Slovenia
T (0)1 75 58 200
metrel@metrel.si
www.metrel.si

Note: Product images in the catalog may differ from the ordered set at the time of delivery. Metrel reserves the right to make technical changes without prior notice.

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