METREL Eutrotest PB, MI 3108 Instruction Manual

EurotestPV

MI 3108

Instruction manual

Version 1.7, Code no. 20 752 095

2

Distributor:

Manufacturer:
METREL d.d.

Ljubljanska cesta 77
1354 Horjul
Slovenia
web site: http://www.metrel.si
e-mail: [e-mail]

Mark on your equipment certifies that this equipment meets the requirements of the EU
(European Union) concerning safety and electromagnetic compatibility regulations

© 2013 – 2017 METREL

The trade names Metrel, Smartec, Eurotest, Autosequence are trademarks registered or pending in Europe
and other countries.

No part of this publication may be reproduced or utilized in any form or by any means
without permission in writing from METREL.

MI 3108 EurotestPV Table of contents

3

Table of contents

1 Preface .................................................................................................................... 6

2 Safety and operational considerations ................................................................. 7

2.1 Warnings and notes .......................................................................................... 7

2.2 Battery and charging ....................................................................................... 12

2.3 Standards applied ........................................................................................... 14

3 Instrument description ......................................................................................... 16

3.1 Front panel ...................................................................................................... 16

3.2 Connector panel .............................................................................................. 17

3.3 Back side ................................ ................................ ................................ ......... 18

3.4 Carrying the instrument ................................................................................... 19

3.5 Instrument set and accessories ....................................................................... 20

3.5.1 Standard set MI 3108 ............................................................................................ 20

3.5.2 Optional accessories ............................................................................................. 20

4 Instrument operation ............................................................................................ 21

4.1 Display and sound ........................................................................................... 21

4.1.1 Terminal voltage monitor ....................................................................................... 21

4.1.2 Battery indication ................................................................................................... 21

4.1.3 Messages .............................................................................................................. 21

4.1.4 Results .................................................................................................................. 22

4.1.5 Sound warnings ..................................................................................................... 22

4.1.6 Help screens ......................................................................................................... 22

4.1.7 Backlight and contrast adjustments ....................................................................... 23

4.2 Function selection ........................................................................................... 23

4.3 Instruments main menu ................................................................................... 25

4.4 Settings ........................................................................................................... 25

4.4.1 Memory ................................................................................................................. 26

4.4.2 Language .............................................................................................................. 26

4.4.3 Date and time ........................................................................................................ 26

4.4.4 RCD standard ....................................................................................................... 27

4.4.5 Z factor .................................................................................................................. 28

4.4.6 Commander support .............................................................................................. 29

4.4.7 Communication ..................................................................................................... 29

4.4.8 Initial settings ........................................................................................................ 32

4.4.9 Clamp Settings ...................................................................................................... 34

4.4.10 Synchronization (A 1378 - PV Remote unit) ....................................................... 34

4.4.11 Solar settings ..................................................................................................... 36

5 Measurements – a.c. LV installations ................................................................. 40

5.1 Compensation of test leads resistance ............................................................ 40

5.2 Voltage, frequency and phase sequence ........................................................ 41

5.3 Insulation resistance ........................................................................................ 43

5.4 Resistance of earth connection and equipotential bonding ............................. 45

5.5 Ring Continuity ................................................................................................ 47

5.6 Testing RCDs .................................................................................................. 52

5.6.1 Contact voltage (RCD Uc) ..................................................................................... 53

5.6.2 Trip-out time (RCDt) .............................................................................................. 54

5.6.3 Trip-out current (RCD I) ................................................................ ......................... 54

MI 3108 EurotestPV Table of contents

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5.6.4 RCD Autotest ........................................................................................................ 56

5.7 Fault loop impedance and prospective fault current ........................................ 59

5.8 Line impedance and prospective short-circuit current / Voltage drop .............. 61

5.8.1 Line impedance and prospective short circuit current ............................................ 62

5.8.2 Voltage drop .......................................................................................................... 63

5.9 Earth resistance .............................................................................................. 65

5.10 PE test terminal ............................................................................................... 67

6 Solar measurements - PV systems ..................................................................... 69

6.1 Insulation resistance on PV systems ............................................................... 69

6.2 PV inverter test ................................................................................................ 71

6.3 PV panel test ................................................................ ................................ ... 75

6.4 Measuring of environmental parameters ......................................................... 77

6.2.1 Operation with A1378 PV Remote Unit ................................................................... 79

6.5 Uoc / Isc test .................................................................................................... 79

6.6 I / V curve measurement ................................................................................. 81

6.7 Measurement of cell temperature before test .................................................. 82

7 Measurements - Power & Energy ........................................................................ 84

7.1 Power .............................................................................................................. 84

7.2 Harmonics ....................................................................................................... 85

7.3 Scope .............................................................................................................. 86

7.4 Current ............................................................................................................ 87

7.5 Energy ............................................................................................................. 89

8 Data handling ........................................................................................................ 90

8.1 Memory organization ....................................................................................... 90

8.2 Data structure .................................................................................................. 90

8.3 Storing test results ........................................................................................... 92

8.4 Recalling test results ....................................................................................... 93

8.5 Clearing stored data ........................................................................................ 94

8.5.1 Clearing complete memory content ....................................................................... 94

8.5.2 Clearing measurement(s) in selected location and its sub-locations ...................... 94

8.5.3 Clearing individual measurements ......................................................................... 95

8.5.4 Renaming installation structure elements (upload from PC) .................................. 96

8.5.5 Renaming installation structure elements with serial barcode reader or RFID reader
96

8.6 Communication ............................................................................................... 98

8.6.1 USB and RS232 communication ........................................................................... 98

Bluetooth communication .................................................................................................. 99

9 Upgrading the instrument .................................................................................. 101

10 Maintenance .................................................................................................... 102

10.1 Fuse replacement .......................................................................................... 102

10.2 Cleaning ........................................................................................................ 102

10.3 Periodic calibration ........................................................................................ 102

10.4 Service .......................................................................................................... 102

11 Technical specifications................................................................................. 103

11.1 Insulation resistance (ISO L/N, ISO L/E, ISO N/E, ISO L/L), Insulation

resistance of PV systems (Roc+, Roc-).................................................................... 103

MI 3108 EurotestPV Table of contents

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11.2 Continuity & Ring (r1, r2, rN, R1+R2, R1+RN) .................................................. 104

11.3 RCD testing ................................................................................................ ... 104

11.3.1 General data .................................................................................................... 104

11.3.2 Contact voltage RCD-Uc ................................................................................. 105

11.3.3 Trip-out time .................................................................................................... 105

11.3.4 Trip-out current ................................................................................................ 105

11.4 Fault loop impedance and prospective fault current ...................................... 106

11.4.1 No disconnecting device or FUSE selected ..................................................... 106

11.4.2 RCD selected .................................................................................................. 107

11.5 Line impedance and prospective short-circuit current / Voltage drop ............ 107

11.6 Resistance to earth ....................................................................................... 108

11.7 Voltage, frequency, and phase rotation ......................................................... 108

11.7.1 Phase rotation ................................................................................................. 108

11.7.2 Voltage ............................................................................................................ 108

11.7.3 Frequency ....................................................................................................... 109

11.7.4 Online terminal voltage monitor ....................................................................... 109

11.8 . TRMS Clamp current ................................................................................... 109

11.9 Power tests .................................................................................................... 110

11.10 PV tests ..................................................................................................... 112

11.10.1 Accuracy of STC data ...................................................................................... 112

11.10.2 Panel, Inverter ................................................................................................. 112

11.10.3 I-V curve .......................................................................................................... 113

11.10.4 Uoc - Isc .......................................................................................................... 113

11.10.5 Environmental parameters ............................................................................... 114

11.10.6 Insulation Resistance of PV systems ............................................................... 114

11.11 General data .............................................................................................. 115

Appendix A - Impedance tables................................................................................ 116

A.1 Impedance tables - for fuses, circuit-breakers and RCBO’s .......................... 116

Appendix B - Accessories for specific measurements .......................................... 118

Appendix C – Country notes .................................................................................... 120

Appendix D – Commander (A 1401) ................................ ................................ ......... 121

D.1 Warnings related to safety .......................................................................... 121

D.2 Battery ............................................................................................................... 121

D.3 Description of commander ................................................................................. 121

D.4 Operation of commander ................................................................................... 122

Appendix E – PV measurements - calculated values ............................................. 124

MI 3108 EurotestPV Preface

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1 Preface

Congratulations on your purchase of the Eurotest instrument and its accessories from
METREL. The instrument was designed on a basis of rich experience, acquired through
many years of dealing with electric installation test equipment.

The Eurotest instrument is a professional, multifunctional, hand-held test instrument
intended to perform all the measurements on a.c. electrical LV installations and d.c.
photovoltaic systems.

The following measurements and tests can be performed on a.c. electrical LV
installations:

 Voltage and frequency,
 Continuity tests,
 Insulation resistance tests,
 RCD testing,
 Fault loop / RCD trip-lock impedance measurements,
 Line impedance / Voltage drop,
 Phase sequence,
 Earthing resistance tests,
 Current measurements,
 Power, harmonics and energy measurements.

Measurements and tests on PV systems:

 Voltages, currents and power in PV systems (Inverter and PV panels),
 Calculation of efficiencies and STC values in PV systems,
 Uoc / Isc measurements,
 Environmental parameters (Temperature and Irradiance),
 I-V curve test,
 Insulation resistance on PV systems.

The graphic display with backlight offers easy reading of results, indications,
measurement parameters and messages. Two LED Pass/Fail indicators are placed at
the sides of the LCD.
The operation of the instrument is designed to be as simple and clear as possible and no
special training (except for the reading this instruction manual) is required in order to
begin using the instrument.
In order for operator to be familiar enough with performing measurements in general and
their typical applications it is advisable to read Metrel handbook Guide for testing and
verification of low voltage installations.

The instrument is equipped with the entire necessary accessory for comfortable testing.

MI 3108 EurotestPV Safety and operational considerations

7

2 Safety and operational considerations

2.1 Warnings and notes

In order to maintain the highest level of operator safety while carrying out various tests
and measurements, Metrel recommends keeping your Eurotest instruments in good
condition and undamaged. When using the instrument, consider the following general
warnings:

General warnings related to safety:

 The symbol on the instrument means »Read the Instruction manual with

special care for safe operation«. The symbol requires an action!

 If the test equipment is used in a manner not specified in this user manual,

the protection provided by the equipment could be impaired!

 Read this user manual carefully, otherwise the use of the instrument may be

dangerous for the operator, the instrument or for the equipment under test!

 Do not use the instrument or any of the accessories if any damage is noticed!
 Consider all generally known precautions in order to avoid risk of electric

shock while dealing with hazardous voltages!

 If the 315 mA fuse blows follow the instructions in this manual in order to

replace it! Use only fuses that are specified!

 Do not disassemble or repair the high breaking current fuse block! In case it

fails the entire block must be replaced with a new original one!

 Do not use the instrument in AC supply systems with voltages higher than

550 Va.c.

 Service, repairs or adjustment of instruments and accessories is only

allowed to be carried out by a competent authorized personnel!

 Use only standard or optional test accessories supplied by your distributor!
 Consider that protection category of some accessories is lower than of the

instrument. Test tips and Tip commander have removable caps. If they are
removed the protection falls to CAT II. Check markings on accessories! (cap

off, 18 mm tip)…CAT II up to 1000 V
(cap on, 4 mm tip)… CAT II 1000 V / CAT III 600 V / CAT IV 300 V

 The instrument comes supplied with rechargeable Ni-MH battery cells. The

cells should only be replaced with the same type as defined on the battery
compartment label or as described in this manual. Do not use standard
alkaline battery cells while the power supply adapter is connected, otherwise
they may explode!

MI 3108 EurotestPV Safety and operational considerations

8

 Hazardous voltages exist inside the instrument. Disconnect all test leads,

remove the power supply cable and switch off the instrument before
removing battery compartment cover.

 Do not connect any voltage source on C1 and P/C2 inputs. They are intended

only for connection of current clamps and sensors. Maximal input voltage is
3 V!

 All normal safety precautions must be taken in order to avoid risk of electric

shock while working on electrical installations!

 If the instrument is not in SOLAR operating mode the instrument displays a

warning if an external DC voltage of higher than 50 V is applied to the
instrument. Measurements are blocked.

Warnings related to safety of measurement functions:

All PV functions

 Use only dedicated accessories for testing on PV electrical installations.

Accessories for PV installations have yellow marked connectors.
Appropriate warnings are displayed.

PV Safety probe A1384 has inbuilt protective circuit that safely disconnects the
instrument from the PV installation in case of a failure in the instrument.
PV test lead A1385 has integrated fuses that safely disconnects instrument from
the PV installation in case of a failure in the instrument.

 Do not use the instrument in PV systems with voltages higher than 1000 V

d.c. and/ or currents higher than 15 A d.c. ! Otherwise the instrument can be
damaged.

 PV sources can produce very high voltages and currents. Only skilled and

trained personnel should perform measurements on photovoltaic systems.

 Local regulations should be considered.
 Safety precautions for working on the roof should be considered.
 In case of a fault in the measuring system (wires, devices, connections,

measuring instrument, accessories), presence of flammable gases, very
high moisture or heavy dust an electrical arc can occur that will not
extinguish by itself. Arcs can lead to fire and can cause heavy damage. Users
must be skilled to disconnect the PV system safely in this case.

Insulation resistance, Insulation resistance of PV systems

 Insulation resistance measurement should only be performed on de-energized

objects!

 Do not touch the test object during the measurement or before it is fully discharged!

Risk of electric shock!

MI 3108 EurotestPV Safety and operational considerations

9

 When an insulation resistance measurement has been performed on a capacitive

object, automatic discharge may not be done immediately! The warning message

and the actual voltage are displayed during discharge until voltage drops below

10 V.

Continuity functions

 Continuity measurements should only be performed on de-energized objects!
 Parallel loops may influence on test results.

Testing PE terminal

 If phase voltage is detected on the tested PE terminal, stop all measurements

immediately and ensure the cause of the fault is eliminated before proceeding with
any activity!

Notes related to measurement functions:
General

 The indicator means that the selected measurement cannot be performed

because of irregular conditions on input terminals.

 Insulation resistance, continuity functions and earth resistance measurements can

only be performed on de-energized objects.

 PASS / FAIL indication is enabled when limit is set. Apply appropriate limit value

for evaluation of measurement results.

 In the case that only two of the three wires are connected to the electrical

installation under test, only voltage indication between these two wires is valid.

Insulation resistance, Insulation resistance of PV systems

 Insulation resistance:

If a voltage of higher than 30 V (AC or DC) is detected between test terminals, the
insulation resistance measurement will not be performed.

 Insulation resistance of PV systems:
 Different pre-tests are carried out. If conditions are proper and safe the

measurement will be continued.
Otherwise or or message is displayed.

 The instrument automatically discharge tested object after finished measurement.
 A double click of TEST key starts a continuous measurement.

Continuity functions

 If a voltage of higher than 10 V (AC or DC) is detected between test terminals, the

continuity resistance test will not be performed.

 Compensate test lead resistance before performing a continuity measurement,

where necessary.

RCD functions

 Parameters set in one function are also kept for other RCD functions!

MI 3108 EurotestPV Safety and operational considerations

10

 The measurement of contact voltage does not normally trip an RCD. However, the

trip limit of the RCD may be exceeded as a result of leakage current flowing to the
PE protective conductor or a capacitive connection between L and PE conductors.

 The RCD trip-lock sub-function (function selector switch in LOOP position) takes

longer to complete but offers much better accuracy of fault loop resistance (in
comparison to the RL sub-result in Contact voltage function).

 RCD trip-out time and RCD trip-out current measurements will only be performed

if the contact voltage in the pre-test at nominal differential current is lower than the
set contact voltage limit!

 The autotest sequence (RCD AUTO function) stops when trip-out time is out of

allowable time period.

Z-LOOP

 The low limit prospective short-circuit current value depends on fuse type, fuse

current rating, fuse trip-out time and impedance scaling factor.

 The specified accuracy of tested parameters is valid only if the mains voltage is

stable during the measurement.

 Fault loop impedance measurements will trip an RCD.
 The measurement of fault loop impedance using trip-lock function does not

normally trip an RCD. However, the trip limit may be exceeded if a leakage current
flows to the PE protective conductor or if there is a capacitive connection between
L and PE conductors.

Z-LINE / Voltage drop

 In case of measurement of Z

Line-Line

with the instrument test leads PE and N
connected together the instrument will display a warning of dangerous PE voltage.
The measurement will be performed anyway.

 Specified accuracy of tested parameters is valid only if mains voltage is stable

during the measurement.

Power / Harmonics / Energy / Current

 Before starting any Power measurement the current clamp settings in Settings

menu should be checked. Select appropriate current clamp model and measuring
range that are best fitted to the expected current values.

 Consider polarity of current clamp (arrow on test clamp should be oriented toward

connected load), otherwise result will be negative!

PV measurements

 A 1384 PV Safety Probe must be used for PANEL, UOC/ISC, I/V and INVERTER

(AC, DC), and ISO PV measurements.

 A 1385 PV test lead must be used for INVERTER AC/DC measurements.
 Before starting a PV measurement the settings of PV module type and PV test

parameters should be checked.

 Environmental parameters (Irr, T) can be measured or entered manually.
 Environmental conditions (irradiance, temperature) must be stable during the

measurements.

MI 3108 EurotestPV Safety and operational considerations

11

 For calculation of STC results measured Uoc / Isc values, irradiance, cell

temperature, and PV module parameters must be known. Refer to Appendix E for
more information.

 Always perform zeroing of DC current clamps before test.

MI 3108 EurotestPV Safety and operational considerations

12

2.2 Battery and charging

The instrument uses six AA size alkaline or rechargeable Ni-MH battery cells. Nominal
operating time is declared for cells with nominal capacity of 2100 mAh. Battery condition
is always displayed in the lower right display part. In case the battery is too weak the
instrument indicates this as shown in figure 2.1. This indication appears for a few seconds
and then the instrument turns itself off.

Figure 2.1: Discharged battery indication

The battery is charged whenever the power supply adapter is connected to the
instrument. The power supply socket polarity is shown in figure 2.2. Internal circuit
controls charging and assures maximum battery lifetime.

+

-

Figure 2.2: Power supply socket polarity

Symbols:

Indication of battery charging

Figure 2.3: Charging indication

Warnings related to safety:

 When connected to an installation, the instruments battery compartment can

contain hazardous voltage inside! When replacing battery cells or before
opening the battery/fuse compartment cover, disconnect any measuring
accessory connected to the instrument and turn off the instrument,

 Ensure that the battery cells are inserted correctly otherwise the instrument will

not operate and the batteries could be discharged.

 Do not recharge alkaline battery cells!
 Use only power supply adapter delivered from the manufacturer or distributor of

the test equipment!

Notes:

 The charger in the instrument is a pack cell charger. This means that the battery

cells are connected in series during the charging. The battery cells have to be
equivalent (same charge condition, same type and age).

MI 3108 EurotestPV Safety and operational considerations

13

 If the instrument is not to be used for a long period of time, remove all batteries

from the battery compartment.

 Alkaline or rechargeable Ni-MH batteries (size AA) can be used. Metrel

recommends only using rechargeable batteries with a capacity of 2100 mAh or
above.

 Unpredictable chemical processes can occur during the charging of battery cells

that have been left unused for a longer period (more than 6 months). In this case
Metrel recommends to repeat the charge / discharge cycle at least 2-4 times.

 If no improvement is achieved after several charge / discharge cycles, then each

battery cell should be checked (by comparing battery voltages, testing them in a
cell charger, etc). It is very likely that only some of the battery cells are deteriorated.
One different battery cell can cause an improper behavior of the entire battery
pack!

 The effects described above should not be confused with the normal decrease of

battery capacity over time. Battery also loses some capacity when it is repeatedly
charged / discharged. This information is provided in the technical specification
from battery manufacturer.

MI 3108 EurotestPV Safety and operational considerations

14

2.3 Standards applied

The Eurotest instruments are manufactured and tested in accordance with the following
regulations:

Electromagnetic compatibility (EMC)

BS EN 61326

Electrical equipment for measurement, control and laboratory
use – EMC requirements
Class B (Hand-held equipment used in controlled EM environments)

Safety (LVD)

BS EN 61010-1

Safety requirements for electrical equipment for measurement, control
and laboratory use – Part 1: General requirements

BS EN 61010-2­030

Safety requirements for electrical equipment for measurement, control
and laboratory use – Part 2-030: Particular requirements for testing and
measuring circuits

BS EN 61010­031

Safety requirements for electrical equipment for measurement, control
and laboratory use – Part 031: Safety requirements for hand-held probe
assemblies for electrical measurement and test

BS EN 61010-2­032

Safety requirements for electrical equipment for measurement, control,
and laboratory use - Part 2-032: Particular requirements for hand-held
and hand-manipulated current sensors for electrical test and
measurement

Functionality

BS EN 61557

Electrical safety in low voltage distribution systems up to 1000 VAC and
1500 VAC – Equipment for testing, measuring or monitoring of protective
measures

Part 1 General requirements
Part 2 Insulation resistance
Part 3 Loop resistance
Part 4 Resistance of earth connection and equipotential
bonding
Part 5 Resistance to earth
Part 6 Residual current devices (RCDs) in TT and TN systems
Part 7 Phase sequence
Part 10 Combined measuring equipment
Part 12 Performance measuring and monitoring devices (PMD)

Reference standards for electrical installations and components

BS EN 61008

Residual current operated circuit-breakers without integral overcurrent
protection for household and similar uses

BS EN 61009

Residual current operated circuit-breakers with integral overcurrent
protection for household and similar uses

EN 60364-4-41

Electrical installations of buildings Part 4-41 Protection for safety –
protection against electric shock

BS 7671

IEE Wiring Regulations (17th edition)

AS/NZS 3017

Electrical installations – Verification guidelines

Reference standard for photovoltaic systems

BS EN 62446

Grid connected photovoltaic systems – Minimum requirements for
system documentation, commissioning tests and inspection

BS EN 61829

Photovoltaic (PV) array – On-site measurement of
current - voltage characteristics

MI 3108 EurotestPV Safety and operational considerations

15

Note about EN and IEC standards:

 Text of this manual contains references to European standards. All standards of

EN 6XXXX (e.g. EN 61010) series are equivalent to IEC standards with the same
number (e.g. IEC 61010) and differ only in amended parts required by European
harmonization procedure.

MI 3108 EurotestPV Instrument description

16

3 Instrument description

3.1 Front panel

Figure 3.1: Front panel

Legend:

1

LCD

128 x 64 dots matrix display with backlight.

2

UP

Modifies selected parameter.

3

DOWN

4

TEST
TEST
Starts measurements.

Acts also as the PE touching electrode.

5

ESC

Goes one level back.

6

TAB

Selects the parameters in selected function.

7

Backlight,
Contrast

Changes backlight level and contrast.

8

ON / OFF

Switches the instrument power on or off.

The instrument automatically turns off 15 minutes after the
last key was pressed

9

HELP / CAL
Accesses help menus.

Calibrates test leads in Continuity functions.

Starts Z

REF

measurement in Voltage drop sub-function.

10

Function selector

- RIGHT

Selects test function.

11

Function selector

- LEFT

12

MEM

Store / recall memory of instrument.
Store clamp and solar settings.

13

Green LEDs
Red LEDs

Indicates PASS / FAIL of result.

MI 3108 EurotestPV Instrument description

17

3.2 Connector panel

Figure 3.2: Connector panel (picture of MI 3108)

Legend:

1

Test connector

Measuring inputs / outputs

2

Charger socket

3 USB connector

Communication with PC USB (1.1) port

4

Protection cover

5

C1

Current clamp measuring input #1

6

P/C2

Current clamp measuring input #2
Measuring input for external probes

7

PS/2 connector

Communication with PC serial port
Connection to optional measuring adapters
Connection to barcode /RFID reader
Connection to Bluetooth dongle

Warnings!

 Maximum allowed voltage between any test terminal and ground is 600 V a.c.,

1000 V d.c.!

 Maximum allowed voltage between test terminals on test connector is 600 V

a.c., 1000 V d.c.!

 Maximum allowed voltage between test terminals P/C2, C1 is 3 V!
 Maximum short-term voltage of external power supply adapter is 14 V!

MI 3108 EurotestPV Instrument description

18

3.3 Back side

1

2

3

Figure 3.3: Back panel

Legend:

1

Battery / fuse compartment cover

2

Back panel information label

3

Fixing screws for battery / fuse compartment cover

Figure 3.4: Battery and fuse compartment

Legend:

1

Fuse F1

FF 315 mA / 1000 V d.c.
(Breaking capacity: 50 kA)

2

High breaking current fuse block

4 Serial number label

5 Battery cells

Size AA, alkaline / rechargeable NiMH

MI 3108 EurotestPV: Instrument description

19

3

1

2

R: 0.0 1999 Test current: max. 8.5mA
Open-circuit voltage:6.5V

Continuity 7mA

R: 0.18M 199.9M , U =50V ,100 ,
R: 0.12M 999M , U = 500V , 1kV
U: 0V 12 00V
Nominal voltages: 100V , 250V , 500V , 1kV
Measuring current: min. 1mA at R =U 1k /V
Short-circuit current: < 3mA

N

N

N N

Insulation resistance (EN 61557-2)

V 2 50V

Continuity

Tripping time

non-delayed (time-delayed) RCDs

1: 0ms 300ms (500ms)
2: 0ms 150ms (200ms)
5: 0ms 40ms (150ms), U : 0.0V 100.0V

C

Tripping current

I : 0.2 I 1.1 I AC (
t : 0ms 300ms, U : 0.0V 100.0V

C

N N N

1.5 I A)

Multiplier: 0.5, 1, 2, 5

Contact voltage

U : 0.0V 100.0V
R : 0.00 10.00k (R =U / I )

C
S S C N

R : 0. 1999 I : 0. A . kAL-N(L) PSC17 20 1 4
Nominal voltage: 100V 440V/ 15Hz 500Hz

Line impedance(EN 61 557-3)

Fault loop (EN 61557-3)

R : 0. 1999
I : 0. A . kA

PFC 14 1 4

Nominal voltage: 100V 264V/ 15Hz 500Hz

impedance

L-PE 17

Voltage, frequency

U: 0V 440V / f: 15Hz 500Hz

Phase rotation (EN 61557-7)

Nominal voltage: 100V 440V / 1 00
Results: 1.2.3 or 2.1.3

5Hz 5 Hz

RCD (EN 61557-6)

I : 10mA, 30mA, 100mA, 300mA, 500mA, 1A
Nominal voltage: 100V 264V / 15Hz 500Hz

R Low (EN 61557-4)

R: 0.12 1999

Test current: min. ±200mA at 2

Open-circuit voltage: 6.5V 9.0V

Resistance to earth (EN 61557-5)

R: 0.04 9999
Open-circuit voltage:
Short-circuit current

< 45V

: < 20mA

RMS

Ljubljanska 77
SI - 1354 Horjul
Tel: [phone]
http://www.metrel.si

20 224 832

CAT III 600V

550V

Figure 3.5: Bottom

Legend:

1

Bottom information label

2

Neck belt openings

3

Handling side covers

3.4 Carrying the instrument

With the neck-carrying belt supplied in standard set, various possibilities of carrying the
instrument are available. Operator can choose appropriate one on basis of his operation,
see the following examples:

The instrument hangs
around operators neck
only - quick placing and
displacing.

MI 3108 EurotestPV: Instrument description

20

The instrument can be used even when placed in
soft carrying bag – test cable connected to the
instrument through the front aperture.

3.5 Instrument set and accessories

3.5.1 Standard set MI 3108

 Instrument
 Soft carrying bag, 2 pcs
 PV Safety Probe
 Monocrystal PV reference cell
 PV Temperature probe
 AC/ DC current clamp
 Plug test cable
 Test lead, 3 x 1.5 m
 Test probe, 4 pcs
 Crocodile clip, 4 pcs
 Set of carrying straps
 PV MC 4 adapter male
 PV MC 4 adapter female
 PV MC 3 adapter male
 PV MC 3 adapter female
 RS232-PS/2 cable
 USB cable
 Set of NiMH battery cells
 Power supply adapter
 CD with instruction manual, and “Guide for testing and verification of low voltage

installations” handbook.

 Short instruction manual
 Calibration Certificate

3.5.2 Optional accessories

See the attached sheet for a list of optional accessories that are available on request from
your distributor.

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4 Instrument operation

4.1 Display and sound

4.1.1 Terminal voltage monitor

The terminal voltage monitor displays on-line the voltages on the test terminals and
information about active test terminals in the a.c. installation measuring mode.

Online voltages are displayed together with test terminal indication. All
three test terminals are used for selected measurement.

Online voltages are displayed together with test terminal indication. L
and N test terminals are used for selected measurement.

L and PE are active test terminals; N terminal should also be connected
for correct input voltage condition.

4.1.2 Battery indication

The battery indication indicates the charge condition of battery and connection of external
charger.

Battery capacity indication.

Low battery.
Battery is too weak to guarantee correct result. Replace or
recharge the battery cells.

Charging in progress (if power supply adapter is connected).

4.1.3 Messages

Following warnings and messages are displayed.

The change in irradiance during the measurement was above
the set limit (Warn. Irr).

The difference between the Uoc STC based on measurement
and Uoc STC value based on set PV module and number of
modules in the string is above the set limit (Warn. Uoc).

Measurement is running, consider displayed warnings.

Conditions on the input terminals allow starting the measurement;
consider other displayed warnings and messages.

Conditions on the input terminals do not allow starting the
measurement, consider displayed warnings and messages.

RCD tripped-out during the measurement (in RCD functions).

MI 3108 EurotestPV Instrument operation

22

Instrument is overheated. The measurement is prohibited until the
temperature decreases under the allowed limit.

Result(s) can be stored.

High electrical noise was detected during measurement. Results may
be impaired.

L and N are changed.

Warning! High voltage is applied to the test terminals.

Warning! Dangerous voltage on the PE terminal! Stop the activity

immediately and eliminate the fault / connection problem before
proceeding with any activity!

Test leads resistance in Continuity measurement is not compensated.

Test leads resistance in Continuity measurement is compensated.

High resistance to earth of test probes. Results may be impaired.

Too small current for declared accuracy. Results may be impaired.
Check in Current Clamp Settings if sensitivity of current clamp can be
increased.

Measured signal is out of range (clipped). Results are impaired.

Fuse F1 is broken.

External DC voltage is detected. Measurements in this operating mode
are blocked.

4.1.4 Results

Measurement result is inside pre-set limits (PASS).

Measurement result is out of pre-set limits (FAIL).

Measurement is aborted. Consider displayed warnings and messages.

4.1.5 Sound warnings

Continuous sound

Warning! Dangerous voltage on the PE terminal is detected.

4.1.6 Help screens

HELP

Opens help screen.

Help menus are available in all functions. The Help menu contains schematic diagrams
for illustrating how to properly connect the instrument to electric installation or PV system.
After selecting the measurement you want to perform, press the HELP key in order to
view the associated Help menu.

MI 3108 EurotestPV Instrument operation

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Keys in help menu:

UP / DOWN

Selects next / previous help screen.

HELP

Scrolls through help screens.

Function selector / ESC

Exits help menu.

Figure 4.1: Examples of help screens

4.1.7 Backlight and contrast adjustments

With the BACKLIGHT key backlight and contrast can be adjusted.

Click

Toggles backlight intensity level.

Keep pressed for 1
s

Locks high intensity backlight level until power is turned off or
the key is pressed again.

Keep pressed for 2
s

Bargraph for LCD contrast adjustment is displayed.

Figure 4.2: Contrast adjustment menu

Keys for contrast adjustment:

DOWN

Reduces contrast.

UP

Increases contrast.

TEST

Accepts new contrast.

Function selector

Exits without changes.

4.2 Function selection

For selecting test / measurement function within each test mode the FUNCTION
SELECTOR keys shall be used.

Keys:

MI 3108 EurotestPV Instrument operation

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Function selector

Selects test / measurement function.

UP/DOWN

Selects sub-function in selected measurement function.
Selects screen to be viewed (if results are split into more screens).

TAB

Selects the test parameter to be set or modified.

TEST

Runs selected test / measurement function.

MEM

Stores measured results / recalls stored results.

ESC

Exits back to main menu.

Keys in test parameter field:

UP/DOWN

Changes the selected parameter.

TAB

Selects the next measuring parameter.

Function selector

Toggles between the main functions.

MEM

Stores measured results / recalls stored results

General rule regarding enabling parameters for evaluation of measurement / test result:

Parameter
OFF

No limit values, indication: _ _ _.

ON

Value(s) – results will be marked as PASS or FAIL in accordance

with selected limit.

See Chapter 5 for more information about the operation of the instrument test functions.

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4.3 Instruments main menu

In instrument’s main menu the test mode can be selected. Different instrument options

can be set in the SETTINGS menu.

 <INSTALLATION> a.c. LV installation testing
 <POWER> Power & Energy testing
 <SOLAR> PV systems testing
 <SETTINGS> Instrument settings

Figure 4.3: Main menu

Keys:

UP / DOWN

Selects appropriate option.

TEST

Enters selected option.

4.4 Settings

Different instrument options can be set in the SETTINGS menu.

Options are:

 Recalling and clearing stored results
 Selection of language
 Setting the date and time
 Selection of reference standard for

RCD tests

 Entering Z factor
 Commander support
 Setting the instrument to initial

values

 Settings for Bluetooth

communication

 Settings for current clamps
 Menu for synchronization with PV

Remote unit

 Settings for PV measurements

Figure 4.4: Options in Settings menu

Keys:

UP / DOWN

Selects appropriate option.

TEST

Enters selected option.

ESC /
Function selector

Exits back to main menu.

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4.4.1 Memory

In this menu the stored data can be recalled or
deleted. See chapter 8 Data handling for more
information.

Figure 4.5: Memory options

Keys:

UP / DOWN

Selects option.

TEST

Enters selected option.

ESC

Exits back to settings menu.

Function selector

Exits back to main menu without changes.

4.4.2 Language

In this menu the language can be set.

Figure 4.6: Language selection

Keys:

UP / DOWN

Selects language.

TEST

Confirms selected language and exits to settings menu.

ESC

Exits back to settings menu.

Function selector

Exits back to main menu without changes.

4.4.3 Date and time

In this menu date and time can be set.

Figure 4.7: Setting date and time

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Keys:

TAB

Selects the field to be changed.

UP / DOWN

Modifies selected field.

TEST

Confirms new date / time and exits.

ESC

Exits back to settings menu.

Function selector

Exits back to main menu without changes.

Warning:

 If the batteries are removed for more than 1 minute the set date and time will be

lost.

4.4.4 RCD standard

In this menu the used standard for RCD
tests can be set.

Figure 4.8: Selection of RCD test

standard

Keys:

UP / DOWN

Selects standard.

TEST

Confirms selected standard.

ESC

Exits back to settings menu.

Function selector

Exits back to main menu without changes.

Maximum RCD disconnection times differ in various standards.
The trip-out times defined in individual standards are listed below.

Trip-out times according to EN 61008 / EN 61009:

½I

N

*)

I

N

2I

N

5I

N

General RCDs
(non-delayed)

t > 300 ms

t < 300 ms

t < 150 ms

t < 40 ms

Selective RCDs
(time-delayed)

t > 500 ms

130 ms < t < 500 ms

60 ms < t < 200 ms

50 ms < t < 150 ms

Trip-out times according to EN 60364-4-41:

½I

N

*)

I

N

2I

N

5I

N

General RCDs
(non-delayed)

t > 999 ms

t < 999 ms

t < 150 ms

t < 40 ms

Selective RCDs
(time-delayed)

t > 999 ms

130 ms < t < 999 ms

60 ms < t < 200 ms

50 ms < t < 150 ms

Trip-out times according to BS 7671:

½I

N

*)

I

N

2I

N

5I

N

General RCDs
(non-delayed)

t > 1999

ms

t < 300 ms

t < 150 ms

t < 40 ms

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Selective
RCDs
(time-delayed)

t > 1999

ms

130 ms < t < 500

ms

60 ms < t < 200

ms

50 ms < t < 150

ms

Trip-out times according to AS/NZS 3017

**)

:

½I

N

*)

I

N

2I

N

5I

N

RCD type

IN [mA]

t



t



t



t



Note

I

 10

> 999 ms

40 ms

40 ms

40 ms

Maximum break time

II

> 10  30

300 ms

150 ms

40 ms

III

> 30

300 ms

150 ms

40 ms

IV

S

> 30

> 999 ms

500 ms

200 ms

150 ms

130 ms

60 ms

50 ms

Minimum non-actuating time

*)

Minimum test period for current of ½IN, RCD shall not trip-out.

**)

Test current and measurement accuracy correspond to AS/NZS 3017 requirements.

Maximum test times related to selected test current for general (non-delayed) RCD

Standard

½I

N

I

N

2I

N

5I

N

EN 61008 / EN 61009

300 ms

300 ms

150 ms

40 ms

EN 60364-4-41

1000 ms

1000 ms

150 ms

40 ms

BS 7671

2000 ms

300 ms

150 ms

40 ms

AS/NZS 3017 (I, II, III)

1000 ms

1000 ms

150 ms

40 ms

Maximum test times related to selected test current for selective (time-delayed) RCD

Standard

½I

N

I

N

2I

N

5I

N

EN 61008 / EN 61009

500 ms

500 ms

200 ms

150 ms

EN 60364-4-41

1000 ms

1000 ms

200 ms

150 ms

BS 7671

2000 ms

500 ms

200 ms

150 ms

AS/NZS 3017 (IV)

1000 ms

1000 ms

200 ms

150 ms

4.4.5 Z factor

In this menu Z correction factor for limit of
maximum Line / Loop impedance can be
set.

Figure 4.9: Selection of Z factor

Keys:

UP / DOWN

Sets Z factor value.

TEST

Confirms Z factor value.

ESC

Exits back to settings menu.

Function selectors

Exits back to main menu without changes.

Maximum impedance in the supply system is important for selection or verification of
protective circuit breakers (fuses, over-current breaking devices, RCDs).

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The default value of Z factor is 0.80. The value should be set according to local regulative.
Z factor can be selected between 0.80 and 1.00.

4.4.6 Commander support

The support for remote commanders can be
enabled or disabled in this menu.

Figure 4.10: Selection of commander

support

Keys:

UP / DOWN

Selects commander option.

TEST

Confirms selected option.

ESC

Exits back to settings menu.

Function selector

Exits back to main menu without changes.

Note:

 Commander disabled option is intended to disable the commander’s remote keys.

In the case of high EM interfering noise the operation of the commander can be
irregular.

4.4.7 Communication

In this menu the instrument’s serial
communication port can be configured and
Bluetooth dongles A 1436 can be initialized.

Figure 4.11: Communication menu

Options:

COM PORT

Enters menu for setting serial communication.

BLUETOOTH DEVICES

Enters menu for viewing and selecting Bluetooth devices.

INIT. BT DONGLES

Enters menu for initialization of Bluetooth dongle(s).

Keys:

UP / DOWN

Selects option.

TEST

Confirms selected option.

ESC

Exits back to settings menu.

Function selector

Exits back to main menu without changes.

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4.4.7.1 Selecting serial communication

In the COM PORT menu the serial
communication can be set (wired,
Bluetooth or wireless).

Figure 4.12: Menu for serial

communication

Options:

COM PORT

RS232

Communication with external devices via
RS232 cable.

BT DONGLE

Communication with mobile devices, Metrel
Powermeters, PCs or other external devices via
Bluetooth.

RS232 WIRELESS

Wireless communication with external devices
(A 1378 PV remote unit).

Keys:

UP / DOWN

Selects option.

TEST

Confirms selected option.

ESC

Exits back to settings menu.

Function selector

Exits back to main menu without changes.

4.4.7.2 Searching for the Metrel Powermeter with Bluetooth connection and
pairing with EurotestPV instrument

In the BLUETOOTH DEVICES menu a Metrel Powermeter with Bluetooth connection can
be found, selected and paired with the instrument. The Metrel Powermeter must have
connected a properly initialized Bluetooth dongle A 1436. See chapter Initialization of the

Bluetooth dongle(s) for more details.

Figure 4.13: Bluetooth devices menu

To select a new Powermeter with Bluetooth connection press TEST in BLUETOOTH
DEVICES menu. A list of found Bluetooth devices will be displayed. Select the appropriate
device using the arrow keys. Confirmation with TEST key will pair those two instruments.