METREL EurotestCOMBO MI 3125, EurotestCOMBO MI 3125 BT Instruction Manual
EurotestCOMBO
MI 3125
MI 3125 BT
Instruction manual
Version 2.3.2, Code no. 20 751 484
Source document version: Version 2.3, Code no. 20 751 484
2
Distributor:
Mark on your equipment certifies that this equipment meets the requirements of the EU
(European Union) concerning safety and electromagnetic compatibility regulations
Manufacturer:
METREL d.d.
Ljubljanska cesta 77
1354 Horjul
Slovenia
web site: http://www.metrel.si
e-mail: metrel@metrel.si
© 2019 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.
3
MI 3125 / BT EurotestCOMBO Table of contents
Table of contents
1 Preface .................................................................................................................... 7
2 Safety and operational considerations ................................................................. 8
2.1 Warnings and notes .......................................................................................... 8
2.2 Battery and charging ....................................................................................... 11
2.2.1 New battery cells or cells unused for a longer period ............................................. 12
2.3 Standards applied ........................................................................................... 13
3 Instrument description ......................................................................................... 14
3.1 Front panel ...................................................................................................... 14
3.2 Connector panel .............................................................................................. 16
3.3 Back side ......................................................................................................... 17
3.4 Display organization ........................................................................................ 18
3.4.1 Terminal voltage monitor ....................................................................................... 18
3.4.2 Battery indication ................................................................................................... 18
3.4.3 Message field ........................................................................................................ 18
3.4.4 Result field ............................................................................................................ 19
3.4.5 Sound warnings ..................................................................................................... 19
3.4.6 Help screens ................................................................ ......................................... 19
3.4.7 Backlight and contrast adjustments ....................................................................... 20
3.5 Instrument set and accessories ....................................................................... 21
3.5.1 Standard set MI 3125 ............................................................................................ 21
3.5.2 Standard set MI 3125 BT ....................................................................................... 21
3.5.3 Optional accessories ............................................................................................. 21
4 Instrument operation ............................................................................................ 22
4.1 Function selection ........................................................................................... 22
4.2 Settings ........................................................................................................... 23
4.2.1 Memory (model MI 3125 BT) ................................................................................. 23
4.2.2 Language .............................................................................................................. 24
4.2.3 Date and time (model MI 3125 BT) ........................................................................ 24
4.2.4 RCD testing ........................................................................................................... 24
4.2.5 Isc factor................................................................................................................ 26
4.2.6 Commander support .............................................................................................. 26
4.2.7 Initial settings ........................................................................................................ 27
5 Measurements ...................................................................................................... 29
5.1 Voltage, frequency and phase sequence ........................................................ 29
5.2 Insulation resistance ........................................................................................ 31
5.3 Resistance of earth connection and equipotential bonding ............................. 33
5.3.1 R LOWΩ, 200 mA resistance measurement .......................................................... 34
5.3.2 Continuous resistance measurement with low current ................................ ........... 35
5.3.3 Compensation of test leads resistance .................................................................. 36
5.4 Testing RCDs .................................................................................................. 37
5.4.1 Contact voltage (RCD Uc) ..................................................................................... 38
5.4.2 Trip-out time (RCDt) .............................................................................................. 39
5.4.3 Trip-out current (RCD I) ......................................................................................... 40
5.4.4 RCD Autotest ........................................................................................................ 41
5.5 Fault loop impedance and prospective fault current ........................................ 44
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MI 3125 / BT EurotestCOMBO Table of contents
5.6 Line impedance and prospective short-circuit current / Voltage drop .............. 46
5.6.1 Voltage drop .......................................................................................................... 48
5.7 Earth resistance .............................................................................................. 50
5.8 PE test terminal ............................................................................................... 51
6 Data handling (model MI 3125 BT) ...................................................................... 53
6.1 Memory organization ....................................................................................... 53
6.2 Data structure .................................................................................................. 53
6.3 Storing test results ........................................................................................... 55
6.4 Recalling test results ....................................................................................... 56
6.5 Clearing stored data ........................................................................................ 57
6.5.1 Clearing complete memory content ....................................................................... 57
6.5.2 Clearing measurement(s) in selected location ....................................................... 57
6.5.3 Clearing individual measurements ......................................................................... 58
6.5.4 Renaming installation structure elements (upload from PC) .................................. 59
6.5.5 Renaming installation structure elements with serial barcode reader or RFID reader
59
6.6 Communication (model MI 3125 BT) ............................................................... 61
6.6.1 USB and RS232 communication ........................................................................... 61
6.6.2 Bluetooth communication ...................................................................................... 62
7 Upgrading the instrument ................................................................ .................... 63
8 Maintenance .......................................................................................................... 64
8.1 Fuse replacement ............................................................................................ 64
8.2 Cleaning .......................................................................................................... 64
8.3 Periodic calibration .......................................................................................... 64
8.4 Service ............................................................................................................ 64
9 Technical specifications ...................................................................................... 65
9.1 Insulation resistance ........................................................................................ 65
9.2 Continuity ........................................................................................................ 66
9.2.1 Resistance R LOW ............................................................................................. 66
9.2.2 Resistance CONTINUITY ...................................................................................... 66
9.3 RCD testing ..................................................................................................... 66
9.3.1 General data ......................................................................................................... 66
9.3.2 Contact voltage RCD-Uc ....................................................................................... 67
9.3.3 Trip-out time .......................................................................................................... 67
9.3.4 Trip-out current ...................................................................................................... 68
9.4 Fault loop impedance and prospective fault current ........................................ 68
9.4.1 No disconnecting device or FUSE selected ........................................................... 68
9.4.2 RCD selected ........................................................................................................ 69
9.5 Line impedance and prospective short-circuit current / Voltage drop .............. 69
9.6 Resistance to earth ......................................................................................... 70
9.7 Voltage, frequency, and phase rotation ........................................................... 70
9.7.1 Phase rotation ....................................................................................................... 70
9.7.2 Voltage .................................................................................................................. 71
9.7.3 Frequency ............................................................................................................. 71
9.7.4 Online terminal voltage monitor ............................................................................. 71
9.8 General data .................................................................................................... 71
A Appendix A - Fuse table ....................................................................................... 73
A.1 Fuse table - IPSC ............................................................................................ 73
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MI 3125 / BT EurotestCOMBO Table of contents
A.2 Fuse table – Impedances at 230 V a.c. (AS/NZS 3017) .................................. 76
B Appendix B - Accessories for specific measurements ..................................... 77
C Appendix C – Country notes ............................................................................... 78
C.1 List of country modifications ............................................................................ 78
C.2 Modification issues .......................................................................................... 78
C.2.1 HUN modification – gR fuse types ..................................................................... 78
C.2.2 AT modification - G type RCD............................................................................ 79
C.2.3 NO, DK, SW modification – IT supply system .................................................... 80
C.2.4 AUS / NZ modification – Fuse types according to AS/NZS 3017 ....................... 81
D Appendix D - IT supply systems ......................................................................... 84
D.1 Standard references ........................................................................................ 84
D.2 Fundamentals .................................................................................................. 84
D.3 Measurement guides ....................................................................................... 84
E Appendix E – Commanders (A 1314, A 1401) ..................................................... 87
E.1 Warnings related to safety............................................................................. 87
E.2 Battery ................................................................................................................. 87
E.3 Description of commanders ................................................................................. 87
E.4 Operation of commanders ................................................................................... 88
6
MI 3125 / BT EurotestCOMBO Preface
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 professional, multifunctional, hand-held test instrument
intended to perform all the measurements required in order for a total inspection of
electrical installations in buildings. The following measurements and tests can be
performed:
Voltage and frequency,
Continuity tests,
Insulation resistance tests,
Earthing resistance tests,
RCD testing,
Fault loop / RCD trip-lock impedance measurements,
Line impedance / Voltage drop,
Phase 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 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 model MI 3125 BT has inbuilt Bluetooth interface for easy communication with PC
and Android devices.
The instrument is equipped with the entire necessary accessory for comfortable testing.
Note:
For some national specific instrument implementations some details in the below
description can differ from the actual instrument implementation. Check the national
specific notes in Appendix C or ask your local dealer.
7
MI 3125 / BT EurotestCOMBO Safety and operational considerations
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:
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!
If a fuse blows in the instrument, follow the instructions in this manual in
order to replace it!
Consider all generally known precautions in order to avoid risk of electric
shock while dealing with hazardous voltages!
Do not use the instrument in supply systems with voltages higher than
550 V!
Service intervention or adjustment 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-Cd or 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 the battery compartment cover.
All normal safety precautions must be taken in order to avoid risk of
electric shock while working on electrical installations!
8
MI 3125 / BT EurotestCOMBO Safety and operational considerations
Warnings related to measurement functions:
Insulation resistance
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!
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 is displayed during discharge until voltage drops below
10 V.
Do not connect test terminals to external voltage higher than 600 V (AC or DC) in
order not to damage the test instrument!
Continuity functions
Continuity measurements should only be performed on de-energized objects!
Parallel impedances or transient currents may influence 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
If voltages of higher than 10 V (AC or DC) is detected between test terminals, the
insulation resistance measurement will not be performed. If voltages of higher
than 10 V (AC or DC) is detected between test terminals, the insulation
resistance measurement will not be performed.
The instrument automatically discharge tested object after finished
measurement.
A double click of TEST key starts a continuous measurement.
9
MI 3125 / BT EurotestCOMBO Safety and operational considerations
Continuity functions
If voltages of higher than 10 V (AC or DC) is detected between test terminals, the
continuity resistance test will not be performed.
Before performing a continuity measurement, where necessary, compensate test
lead resistance.
RCD functions
Parameters set in one function are also kept for other RCD functions!
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.
The measuring accuracy and immunity against noise are higher if parameter in
Zs rcd is set to standard “Std”.
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 as a result of
leakage current flowing to the PE protective conductor or a capacitive connection
between L and PE conductors. In this case setting parameter in measuring
function Zs rcd to “Low” can help.
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.
L and N test terminals are reversed automatically according to detected terminal
voltage (except in UK version).
10
MI 3125 / BT EurotestCOMBO Safety and operational considerations
+
-
Symbols:
Indication of battery charging
Figure 2.3: Charging indication
2.2 Battery and charging
The instrument uses six AA size alkaline or rechargeable Ni-Cd or 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
The instrument automatically recognizes the connected power supply adapter and
begins charging.
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.
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-Cd or Ni-MH batteries (size AA) can be used. Metrel
recommends only using rechargeable batteries with a capacity of 2100 mAh or
above.
Do not recharge alkaline battery cells!
Use only power supply adapter delivered from the manufacturer or distributor of
the test equipment to avoid possible fire or electric shock!
11
MI 3125 / BT EurotestCOMBO Safety and operational considerations
Procedure
Notes
Completely charge the battery.
At least 14 h with in-built charger.
Completely discharge the battery.
This can be performed by using the
instrument normally until the instrument is
fully discharged.
Repeat the charge / discharge cycle
at least 2-4 times.
Four cycles are recommended in order to
restore the batteries to their normal
capacity.
2.2.1 New battery cells or cells unused for a longer period
Unpredictable chemical processes can occur during the charging of new battery cells or
cells that have been left unused for a longer period (more than 3 months). Ni-MH and
Ni-Cd cells can be subjected to these chemical effects (sometimes called the memory
effect). As a result the instrument operation time can be significantly reduced during the
initial charging/discharging cycles of the batteries.
In this situation, Metrel recommend the following procedure to improve the battery
lifetime:
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).
One different battery cell can cause an improper charging and incorrect
discharging during normal usage of the entire battery pack (it results in heating of
the battery pack, significantly decreased operation time, reversed polarity of
defective cell,…).
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.
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. Actual decreasing of capacity, versus number of charging
cycles, depends on battery type. This information is provided in the technical
specification from battery manufacturer.
12
MI 3125 / BT EurotestCOMBO Safety and operational considerations
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 61010-031
Safety requirements for hand-held probe assemblies for electrical
measurement and test
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.
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 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
Other reference standards for testing RCDs
EN 61008
Residual current operated circuit-breakers without integral overcurrent
protection for household and similar uses
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
IEC 60364-5-52
Low-voltage electrical installations – Part 5-52: Selection and erection
of electrical equipment – Wiring systems
BS 7671
IEE Wiring Regulations (17th edition)
AS / NZ 3760
In-service safety inspection and testing of electrical equipment
2.3 Standards applied
The Eurotest instruments are manufactured and tested in accordance with the following
regulations:
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.
13
MI 3125 / BT EurotestCOMBO Instrument description
2
3
4
5
6
7
8
9
10
1
11
12
1
LCD
128 x 64 dots matrix display with backlight.
2
TEST
TEST
Starts measurements.
Acts also as the PE touching electrode.
3
UP
Modifies selected parameter.
4
DOWN
5*
MEM
Store / recall / clear tests in memory of instrument.
5**
CAL
Calibrates test leads in Continuity functions.
Starts Z
REF
measurement in Voltage drop sub-function.
6
Function selectors
Selects test 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.
3 Instrument description
3.1 Front panel
Legend:
* Model MI 3125 BT
** Model MI 3125
Figure 3.1: Front panel (picture of MI 3125 BT)
14
MI 3125 / BT EurotestCOMBO Instrument description
9*
HELP / CAL
Accesses help menus.
In RCD Auto toggles between top and bottom parts of results
field.
Calibrates test leads in Continuity functions.
Starts Z
REF
measurement in Voltage drop sub-function.
9**
HELP
Accesses help menus.
In RCD Auto toggles between top and bottom parts of results
field.
10
TAB
Selects the parameters in selected function.
11
PASS
Green indicator
Indicates PASS/ FAIL of result.
12
FAIL
Red indicator
15
MI 3125 / BT EurotestCOMBO Instrument description
1
Test connector
Measuring inputs / outputs
2
Protection cover
3 Charger socket
4*
USB connector
Communication with PC USB (1.1) port.
5*
PS/2 connector
Communication with PC serial port and connection to optional
accessories.
5**
PS/2 connector
Serial port for upgrading the instrument.
3.2 Connector panel
Figure 3.2: Connector panel (picture of MI 3125 BT)
Legend:
* Model MI 3125 BT
** Model MI 3125
Warnings!
Maximum allowed voltage between any test terminal and ground is 600 V!
Maximum allowed voltage between test terminals is 600 V!
Maximum short-term voltage of external power supply adapter is 14 V!
16
MI 3125 / BT EurotestCOMBO Instrument description
1
Side belt
2
Battery compartment cover
3
Fixing screw for battery compartment cover
4
Back panel information label
5
Holder for inclined position of the instrument
6
Magnet for fixing instrument close to tested item (optional)
1
Battery cells
Size AA, alkaline or rechargeable NiMH / NiCd
2
Serial number label
3 Fuse
M 0.315 A, 250 V
3.3 Back side
Figure 3.3: Back side
Legend:
Figure 3.4: Battery compartment
Legend:
17
MI 3125 / BT EurotestCOMBO Instrument description
Figure 3.5: Typical function
display
Function name
Result field
Test parameter field
Message field
Terminal voltage
monitor
Battery indication
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.
Battery capacity indication.
Low battery.
Battery is too weak to guarantee correct result. Replace or
recharge the battery cells.
Recharging in progress (if power supply adapter is connected).
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.
3.4 Display organization
3.4.1 Terminal voltage monitor
The terminal voltage monitor displays on-line the voltages on the test terminals and
information about active test terminals.
3.4.2 Battery indication
The indication indicates the charge condition of battery and connection of external
charger.
3.4.3 Message field
In the message field warnings and messages are displayed.
18
MI 3125 / BT EurotestCOMBO Instrument description
RCD tripped-out during the measurement (in RCD functions).
Instrument is overheated. The measurement is prohibited until the
temperature decreases under the allowed limit.
Result(s) can be stored. (model MI 3125 BT)
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.
Fuse F1 is broken.
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.
Continuous sound
Warning! Dangerous voltage on the PE terminal is detected.
HELP
Opens help screen.
UP / DOWN
Selects next / previous help screen.
HELP
Scrolls through help screens.
Function selectors / TEST
Exits help menu.
3.4.4 Result field
3.4.5 Sound warnings
3.4.6 Help screens
Help menus are available in all functions. The Help menu contains schematic diagrams
for illustrating how to properly connect the instrument to electric 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:
19
MI 3125 / BT EurotestCOMBO Instrument description
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.
DOWN
Reduces contrast.
UP
Increases contrast.
TEST
Accepts new contrast.
Function selectors
Exits without changes.
Figure 3.6: Examples of help screens
3.4.7 Backlight and contrast adjustments
With the BACKLIGHT key backlight and contrast can be adjusted.
Figure 3.7: Contrast adjustment menu
Keys for contrast adjustment:
20
MI 3125 / BT EurotestCOMBO Instrument description
3.5 Instrument set and accessories
3.5.1 Standard set MI 3125
Instrument
Short instruction manual
Calibration Certificate
Mains measuring cable
Test lead.,3 x 1.5 m
Test probe, 3 pcs
Crocodile clip, 3 pcs
Set of NiMH battery cells
Power supply adapter
CD with instruction manual, and “Guide for testing and verification of low voltage
installations” handbook
Set of carrying straps
3.5.2 Standard set MI 3125 BT
Instrument
Short instruction manual
Calibration Certificate
Mains measuring cable
Test lead, 3 x 1.5 m
Test probe, 3 pcs
Crocodile clip, 3 pcs
Set of NiMH battery cells
Power supply adapter
CD with instruction manual, and “Guide for testing and verification of low voltage
installations” handbook and PC software EuroLink PRO
Set of carrying straps
RS232 - PS/2 cable
USB cable
3.5.3 Optional accessories
See the attached sheet for a list of optional accessories that are available on request
from your distributor.
21
MI 3125 / BT EurotestCOMBO Instrument operation
FUNCTION
SELECTOR
Select test / measurement function:
<VOLTAGE TRMS> Voltage and frequency and phase sequence.
<R ISO> Insulation resistance.
<R LOWΩ> Resistance of earth connections and bondings.
<Zline> Line impedance
<Zloop> Fault loop impedance.
<RCD> RCD testing.
<EARTH RE> Resistance to earth
<SETTINGS> General instrument settings.
UP/DOWN
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 (model MI 3125 BT).
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
(model MI 3125 BT).
Parameter
OFF
No limit values, indication: _ _ _.
ON
Value(s) – results will be marked as PASS or FAIL in
accordance with selected limit.
4 Instrument operation
4.1 Function selection
For selecting test function the FUNCTION SELECTOR shall be used.
Keys:
Keys in test parameter field:
General rule regarding enabling parameters for evaluation of measurement / test result:
See Chapter 5 for more information about the operation of the instrument test functions.
22
MI 3125 / BT EurotestCOMBO Instrument operation
All models:
Selection of language,
Setting the instrument to initial
values,
Selection of reference standard for
RCD test,
Entering Isc factor,
Commander support.
Model MI 3125 BT:
Recalling and clearing stored results,
Setting the date and time
Figure 4.1: Options in Settings menu
UP / DOWN
Selects appropriate option.
TEST
Enters selected option.
Function selectors
Exits back to main function menu.
In this menu the stored data can be recalled
and deleted. See chapter 6 Data handling for
more information.
Figure 4.2: Memory options
UP / DOWN
Selects option.
TEST
Enters selected option.
Function selectors
Exits back to main function menu.
4.2 Settings
Different instrument options can be set in the SETTINGS menu.
Keys:
4.2.1 Memory (model MI 3125 BT)
Keys:
23
MI 3125 / BT EurotestCOMBO Instrument operation
In this menu the language can be set.
Figure 4.3: Language selection
UP / DOWN
Selects language.
TEST
Confirms selected language and exits to settings menu.
Function selectors
Exits back to main function menu.
In this menu date and time can be set.
Figure 4.4: Setting date and time
TAB
Selects the field to be changed.
UP / DOWN
Modifies selected field.
TEST
Confirms new setup and exits.
Function selectors
Exits back to main function menu.
In this menu the used standard for RCD
tests can be set.
Figure 4.5: Selection of RCD test
standard
4.2.2 Language
Keys:
4.2.3 Date and time (model MI 3125 BT)
Keys:
Warning:
If the batteries are removed for more than 1 minute the set time and date will be
lost.
4.2.4 RCD testing
24
MI 3125 / BT EurotestCOMBO Instrument operation
UP / DOWN
Selects standard.
TEST
Confirms selected standard.
Function selectors
Exits back to main function menu.
½I
N
*)
I
N
2I
N
5I
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
½I
N
*)
I
N
2I
N
5I
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
½I
N
*)
I
N
2I
N
5I
N
General RCDs
(non-delayed)
t > 1999 ms
t < 300 ms
t < 150 ms
t < 40 ms
Selective RCDs
(time-delayed)
t > 1999 ms
130 ms < t < 500 ms
60 ms < t < 200 ms
50 ms < t < 150 ms
½I
N
*)
I
N
2I
N
5I
N
RCD type
IN [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
Standard
½I
N
I
N
2I
N
5I
N
EN 61008 / EN 61009
300 ms
300 ms
150 ms
40 ms
IEC 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
Keys:
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:
Trip-out times according to IEC 60364-4-41:
Trip-out times according to BS 7671:
Trip-out times according to AS/NZS 3017
*)
Minimum test period for current of ½IN, 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
Maximum test times related to selected test current for selective (time-delayed) RCD
25
MI 3125 / BT EurotestCOMBO Instrument operation
Standard
½I
N
I
N
2I
N
5I
N
EN 61008 / EN 61009
500 ms
500 ms
200 ms
150 ms
IEC 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
In this menu the Isc factor for calculation of
short circuit current in Z-LINE and Z-LOOP
measurements can be set.
Figure 4.6: Selection of Isc factor
UP / DOWN
Sets Isc value.
TEST
Confirms Isc value.
Function selectors
Exits back to main function menu.
UP / DOWN
Selects commander model. Disables commander support.
TEST
Confirms selected option.
Function
selectors
Exits back to main function menu.
4.2.5 Isc factor
Keys:
Short circuit current Isc in the supply system is important for selection or verification of
protective circuit breakers (fuses, over-current breaking devices, RCDs).
The default value of Isc factor (ksc) is 1.00. The value should be set according to local
regulative.
Range for adjustment of the Isc factor is 0.20 3.00.
4.2.6 Commander support
The support for commanders can be set in this menu.
Figure 4.7: Selection of commander support
Keys:
26
MI 3125 / BT EurotestCOMBO Instrument operation
In this menu the instrument settings and
measurement parameters and limits can be
set to initial (factory) values.
Internal Bluetooth module is initialized. (MI
3125 BT only)
Figure 4.8: Initial settings dialogue
TEST
Restores default settings (YES must be selected with
/ keys).
Function selectors
Exits back to main function menu without changes.
Instrument setting
Default value
Contrast
As defined and stored by adjustment procedure
Isc factor
1.00
RCD standards
EN 61008 / EN 61009
Language
English
Commander
A1314, A1401
Internal bluetooth
Initialization of internal Bluetooth module.
(MI 3125 BT only)
Function
Parameters / limit value
Sub-function
EARTH RE
No limit
Commander models
A1314, A1401: new commanders (more information can be found in Appendix E)
Note:
Commander disabled is intended to disable the commander’s remote keys. In the
case of high EM interfering noise the operation of the commander’s key can be
irregular.
4.2.7 Initial settings
Keys:
Warnings:
Customized settings will be lost when this option is used!
If the batteries are removed for more than 1 minute the custom made settings will
be lost.
The default setup is listed below:
27
MI 3125 / BT EurotestCOMBO Instrument operation
R ISO
No limit
Utest = 500 V
Low Ohm Resistance
R LOW
No limit
CONTINUITY
No limit
Z - LINE
Fuse type: none selected
VOLTAGE DROP
ΔU: 4.0 %
Z
REF
: 0.00 Ω
Z - LOOP
Fuse type: none selected
Zs rcd
Test current: standard
Fuse type: none selected
RCD
RCD t
Nominal differential current: IN=30 mA
RCD type: AC
non-delayed
Test current starting polarity: (0)
Limit contact voltage: 50 V
Current multiplier: 1
Note:
Initial settings (reset of the instrument) can be recalled also if the TAB key is
pressed while the instrument is switched on.
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