METREL EurotestIM User manual

EurotestIM
MI 3110
Instruction manual
Version 1.2.2, Code no. 20 752 063

2
Distributor:
Manufacturer:
Metrel d.d.
Ljubljanska cesta 77
SI-1354 Horjul
Slovenia
https://www.metrel.si
[email protected]
Mark on your equipment certifies that it meets requirements of all subjected EU
regulations.
Hereby, Metrel d.d. declares that the MI 3110 is in compliance with subjected EU
directive. The full text of the EU declaration of conformity is available at the
following internet address https://www.metrel.si/DoC.
© 2022 METREL
The trade names Metrel®, Smartec®, Eurotest®, Auto Sequence®are trademarks registered 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 3110 EurotestIM Table of contents
3
Table of contents
1Preface ....................................................................................................................5
2Safety and operational considerations.................................................................6
2.1 Warnings and notes ..........................................................................................6
2.2 Battery and charging.........................................................................................8
2.3 Standards applied ...........................................................................................10
3Instrument description.........................................................................................11
3.1 Front panel......................................................................................................11
3.2 Connector panel..............................................................................................12
3.3 Back side.........................................................................................................13
3.4 Carrying the instrument...................................................................................14
3.5 Instrument set and accessories.......................................................................15
3.5.1 Standard set MI 3110............................................................................................15
3.5.2 Optional accessories.............................................................................................15
4Instrument operation............................................................................................16
4.1 Display organization........................................................................................16
4.1.1 Terminal voltage monitor.......................................................................................16
4.1.2 Battery indication...................................................................................................16
4.1.3 Messages..............................................................................................................16
4.1.4 Results..................................................................................................................17
4.1.5 Sound warnings.....................................................................................................17
4.1.6 Help screens.........................................................................................................17
4.1.7 Backlight and contrast adjustments.......................................................................18
4.2 Function selection ...........................................................................................18
4.3 Instruments main menu...................................................................................20
4.4 Settings ...........................................................................................................20
4.4.1 Memory.................................................................................................................21
4.4.2 Language..............................................................................................................21
4.4.3 Date and time........................................................................................................21
4.4.4 Isc factor................................................................................................................22
4.4.5 Commander support..............................................................................................22
4.4.6 Initial settings ........................................................................................................23
5Measurements –a.c. LV IT installations.............................................................24
5.1 Voltage, frequency and phase sequence ........................................................24
5.2 Line impedance and prospective short-circuit current / Voltage drop..............26
5.2.1 Line impedance and prospective short circuit current............................................27
5.2.2 Voltage drop..........................................................................................................28
5.3 First fault leakage current (ISFL).....................................................................30
5.4 Testing of insulation monitoring devices (IMD)................................................32
5.5 Automatic measurement procedure ................................................................35
5.6 PE test terminal...............................................................................................38
6Data handling........................................................................................................39
6.1 Memory organization.......................................................................................39
6.2 Data structure..................................................................................................39
6.3 Storing test results...........................................................................................41
6.4 Recalling test results .......................................................................................42

MI 3110 EurotestIM Table of contents
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6.5 Clearing stored data........................................................................................43
6.5.1 Clearing complete memory content.......................................................................43
6.5.2 Clearing measurement(s) in selected location.......................................................43
6.5.3 Clearing individual measurements.........................................................................44
6.5.4 Renaming installation structure elements (upload from PC)..................................45
6.6 Communication ...............................................................................................45
7Upgrading the instrument....................................................................................47
8Maintenance..........................................................................................................48
8.1 Fuse replacement............................................................................................48
8.2 Cleaning..........................................................................................................48
8.3 Periodic calibration..........................................................................................48
8.4 Service ............................................................................................................48
9Technical specifications......................................................................................49
9.1 Voltage, frequency, and phase rotation...........................................................49
9.1.1 Voltage..................................................................................................................49
9.1.2 Frequency.............................................................................................................49
9.1.3 Online terminal voltage monitor.............................................................................49
9.1.4 Phase rotation.......................................................................................................49
9.2 Line impedance and prospective short-circuit current / Voltage drop..............50
9.3 First fault leakage current (ISFL).....................................................................51
9.4 Calibrated resistance for IMD testing ..............................................................51
9.5 General data....................................................................................................51
Appendix A - Fuse table..............................................................................................53
A.1 Fuse table - IPSC............................................................................................53
A.2 Fuse table - impedances (UK).........................................................................55
Appendix B - Accessories for specific measurements............................................57
Appendix C –Commanders (A 1314, A 1401) ...........................................................58
C.1 Warnings related to safety ............................................................................58
C.2 Battery.................................................................................................................58
C.3 Description of commanders.................................................................................58
C.4 Operation of commanders...................................................................................59

MI 3110 EurotestIM Preface
5
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 IT installations.
The following measurements and tests can be performed on a.c. electrical LV IT
installations:
❑voltage and frequency,
❑line impedance / Voltage drop,
❑first fault current,
❑testing of Insulation monitoring devices (IMD),
❑auto-sequence.
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 measurements in general and their
typical applications in IT supply system it is advisable to read Metrel handbook
Measurements on IT power supply systems.
Model versions 3.x.xx supports operation with new commanders A 1314 and A 1401.
The instrument is equipped with the entire necessary accessory for comfortable testing.

MI 3110 EurotestIM Safety and operational considerations
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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!
❑In case a fuse has blown follow the instructions in this manual to replace it!
❑Do not use the instrument in AC supply systems with voltages higher than
550 V a.c.
❑Service, repairs or adjustment of instruments and accessories is only
allowed to be carried out by 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 have removable caps. If they are removed the
protection falls to CAT II. Check markings on accessories!
❑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!
❑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.

MI 3110 EurotestIM Safety and operational considerations
7
❑All normal safety precautions must be taken in order to avoid risk of
electric shock while working on electrical installations!
Warnings related to safety of measurement functions:
Testing PE terminal
❑PE test probe (TEST key) is activated, but does not inhibit selected test if voltage
is detected.
Notes related to measurement functions:
General
❑The indicator means that the selected measurement cannot be performed
because of irregular conditions on input terminals.
❑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.
Z-LINE / Voltage drop
❑High fluctuations of mains voltage influence the measurement results. The noise
sign is displayed in the message field in this case. Repeat the measurement.
❑Specified accuracy of tested parameters is valid only if mains voltage is stable
during the measurement.
❑If the reference impedance is not set the value of Zref is considered as 0.00 Ω.
❑The Zref is cleared (set to 0.00 Ω) if pressing CAL key while instrument is not
connected to a voltage source.
❑If the measured voltage is outside the ranges, ΔU result will not be calculated.
Testing of Insulation monitoring devices (IMD)
❑It is recommended to disconnect all appliances from the tested supply to receive
regular test results. Any connected appliance will influence the insulation
resistance threshold test.
❑The displayed resistances and currents are indicative only. Displayed resistance
can significantly differ from the actual resistance the Eurotest simulates. If IMD’s
with very low test currents (below 1mA) are checked the displayed resistance
value is typically lower (and current higher) than the actual simulated resistance.
The difference is lower for lower set resistances.

MI 3110 EurotestIM Safety and operational considerations
8
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 3110 EurotestIM Safety and operational considerations
9
❑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 2100mAh 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 repeating 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 3110 EurotestIM Safety and operational considerations
10
2.3 Standards applied
The Eurotest instruments are manufactured and tested in accordance with the following
regulations:
Electromagnetic compatibility (EMC)
EN 61326
Electrical equipment for measurement, control and laboratory
use –EMC requirements
Class B (Hand-held equipment used in controlled EM environments)
Safety (LVD)
EN 61010-1
Safety requirements for electrical equipment for measurement, control
and laboratory use –Part 1: General requirements
EN 61010-2-030
Safety requirements for electrical equipment for measurement, control
and laboratory use –Part 2-030: Particular requirements for testing
and measuring circuits
EN 61010-031
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
Functionality
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 3 Loop resistance
Part 10 Combined measuring equipment
Reference standards for electrical installations and components
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
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 3110 EurotestIM Instrument description
11
3 Instrument description
3.1 Front panel
Figure 3.1: Front panel
Legend:
1
LCD
128 x 64 dots matrix display with backlight.
2

Modifies selected parameter.
3

4
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.
Starts ZREF measurement in Voltage drop sub-function.
10
Function selector
- RIGHT
Selects test function.
11
Function selector
- LEFT
12
MEM
Stores / recalls memory of the instrument.
13
Green LED
Red LED
Indicates PASS / FAIL of result.

MI 3110 EurotestIM Instrument description
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3.2 Connector panel
Figure 3.2: Connector panel
Legend:
1
Test connector
Measuring inputs / outputs
2
Charger socket
3
USB connector
Communication with PC USB (1.1) port
4
Protection cover
5
PS/2 connector
Communication with PC serial port
Warnings!
❑Maximum allowed voltage between any test terminal and ground is 600 V!
❑Maximum allowed voltage between test terminals on test connector is 550 V!
❑Maximum short-term voltage of external power supply adapter is 14 V!

MI 3110 EurotestIM Instrument description
13
3.3 Back side
12
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
Fuses F2, F3
F 4 A / 500 V
(Breaking capacity: 50 kA)

MI 3110 EurotestIM Instrument description
14
2
Serial number label
3
Battery cells & holder
Size AA, alkaline / rechargeable NiMH.
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 1200V
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 250V
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 61557-3)
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 3110 EurotestIM Instrument description
15
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 3110
❑Instrument MI 3110 EurotestIM
❑Soft carrying bag
❑Mains measuring cable
❑Test lead, 3 x 1.5 m
❑Test probe, 3 pcs
❑Crocodile clip, 3 pcs
❑Set of carrying straps
❑RS232-PS/2 cable
❑USB cable
❑Set of NiMH battery cells
❑Power supply adapter
❑CD with instruction manual, and “Measurements on IT installation” 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.

MI 3110 EurotestIM Instrument operation
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4 Instrument operation
4.1 Display organization
Figure 4.1: Typical function
display
Function name
Result field
Test parameter field
Message field
Terminal voltage monitor
Battery indication
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. L1
and L2 test terminals are used for selected measurement.
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
In the message field warnings and messages are displayed.
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.

MI 3110 EurotestIM Instrument operation
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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.
Single fault condition in IT system.
Warning! Dangerous voltage on the PE terminal! Stop the activity
immediately and eliminate the fault / connection problem before
proceeding with any activity!
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.
Check the wiring situation!
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 a.c. electrical LV IT installation.
After selecting the measurement you want to perform, press the HELP key in order to
view the associated Help menu.
Keys in help menu:
/ 
Selects next / previous help screen.
ESC / HELP /
Function selector
Exits help menu.
Figure 4.2: Example of help screen

MI 3110 EurotestIM Instrument operation
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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 4.3: Contrast adjustment menu
Keys for contrast adjustment:

Reduces contrast.

Increases contrast.
TEST
Accepts new contrast.
ESC
Exits without changes.
4.2 Function selection
For selecting test / measurement function the FUNCTION SELECTOR keys shall be
used.
Keys:
Function selector
Selects test / measurement function.
/ 
Selects sub-function in selected measurement function.
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:
/ 
Changes the selected parameter.
TAB
Selects the next measuring parameter.
Function selector
Toggles between the main functions.
MEM
Stores measured results / recalls stored results.

MI 3110 EurotestIM Instrument operation
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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 5Measurements –a.c. LV IT installations for more information about the
operation of the instrument test functions.

MI 3110 EurotestIM Instrument operation
20
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.
❑<AUTO SEQUENCE> automatic testing
❑<SINGLE TESTS> a.c. LV IT installation testing
❑<SETTINGS> Instrument settings
Figure 4.4: Main menu
Keys:
/ 
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
❑Entering Isc factor
❑Commander support
❑Setting the instrument to initial values
Figure 4.5: Options in Settings menu
Keys:
/ 
Selects appropriate option.
TEST
Enters selected option.
ESC /
Function selector
Exits back to main menu.