METREL EurotestAT MI 3101 User manual

EurotestAT
MI 3101
Instruction manual
Version 5.0, HW 5; Code no. 20 751 834

2
Distributor:
Manufacturer:
METREL d.d.
Ljubljanska cesta 77
1354 Horjul
Slovenia
web site: http://www.metrel.si
e-mail: [email protected]
Mark on your equipment certifies that this equipment meets the requirements of the EU
(European Union) concerning safety and electromagnetic compatibility regulations
© 2005..2010 METREL
No part of this publication may be reproduced or utilized in any form or by any means
without permission in writing from METREL.

MI 3101 EurotestAT Table of contents
3
1Preface ..................................................................................................................................... 6
2Safety and operational considerations ................................................................................. 7
2.1 Warnings and notes .......................................................................................................... 7
2.2 Battery and charging ....................................................................................................... 10
2.2.1 New battery cells or cells unused for a longer period.............................................. 11
2.3 Standards applied ........................................................................................................... 12
3Instrument description ......................................................................................................... 13
3.1 Front panel ...................................................................................................................... 13
3.2 Connector panel.............................................................................................................. 14
3.3 Back panel....................................................................................................................... 15
3.4 Bottom............................................................................................................................. 16
3.5 Display organization........................................................................................................ 17
3.5.1 Terminal voltage monitor.........................................................................................17
3.5.2 Menu line.................................................................................................................18
3.5.3 Message field .......................................................................................................... 18
3.5.4 Result field............................................................................................................... 19
3.5.5 Other messages...................................................................................................... 19
3.5.6 Sound warnings....................................................................................................... 19
3.5.7 Help.........................................................................................................................19
3.5.8 Backlight and contrast adjustments......................................................................... 20
3.6 Carrying the instrument ................................................................................................... 21
3.7 Instrument set and accessories....................................................................................... 21
3.7.1 Standard set............................................................................................................ 21
3.7.2 Optional accessories............................................................................................... 21
4Instrument operation ............................................................................................................22
4.1 Main menu.......................................................................................................................22
4.2 Single test........................................................................................................................ 23
4.3 Automatic testing............................................................................................................. 24
4.3.1 Auto sequence number main menu ........................................................................26
4.3.2 Auto sequence set................................................................................................... 26
4.3.3 Test parameters in auto sequence.......................................................................... 27
4.3.4 Name and description of auto sequence.................................................................28
4.3.5 Storing auto sequence settings (sequence, number, name)................................... 29
4.3.6 Pause flag and comments in auto sequence........................................................... 30
4.3.7 Setting pause flag and comments........................................................................... 30
4.3.8 Building an auto sequence...................................................................................... 32
4.4 Miscellaneous.................................................................................................................. 37
4.4.1 Language ................................................................................................................ 37
4.4.2 Supply system, Isc factor, RCD standard................................................................ 38
4.4.3 Memory ................................................................................................................... 40
4.4.4 Date and time.......................................................................................................... 40
4.4.5 Initial settings........................................................................................................... 40
4.4.6 Communication port ................................................................................................ 43
4.4.7 Locator .................................................................................................................... 43
4.4.8 Operator.................................................................................................................. 43
5Measurements ....................................................................................................................... 45
5.1 Insulation resistance........................................................................................................ 45
5.2 Resistance to earth connection and equipotential bonding............................................. 47
5.2.1 Continuity R200 mA measurement.......................................................................... 47
5.2.2 7 mA resistance measurement................................................................................ 49
5.2.3 Compensation of test leads resistance....................................................................50
5.3 Testing RCDs.................................................................................................................. 52

MI 3101 EurotestAT Table of contents
4
5.3.1 Contact voltage (RCD Uc)....................................................................................... 53
5.3.2 Trip-out time (RCD t)............................................................................................... 54
5.3.3 Trip-out current (RCD I

) ......................................................................................... 55
5.3.4 RCD Autotest .......................................................................................................... 56
5.4 Fault loop impedance and prospective fault current........................................................ 58
5.5 Line impedance / prospective short-circuit current and Voltage drop ............................. 60
5.5.1 Line impedance and prospective short circuit current............................................. 61
5.5.2 Voltage drop............................................................................................................ 62
5.6 Voltage, frequency and phase sequence........................................................................ 64
5.7 Resistance to earth ......................................................................................................... 66
5.7.1 Standard 3-wire measurement................................................................................ 66
5.7.2 Specific earth resistance measurement.................................................................. 68
5.8 2 line/loop impedance.................................................................................................. 69
5.9 PE test terminal............................................................................................................... 72
5.10 Locator ............................................................................................................................ 73
5.11 Varistor test ..................................................................................................................... 75
6Data handling ........................................................................................................................ 77
6.1 Memory organization....................................................................................................... 77
6.2 Installation data structure ................................................................................................ 77
6.3 Storing test results........................................................................................................... 80
6.3.1 Saving results specialties........................................................................................ 80
6.4 Recalling test results and parameters............................................................................. 81
6.4.1 Recalling result........................................................................................................81
6.5 Clearing saved data ........................................................................................................ 83
6.5.1 Clearing specialties ................................................................................................. 84
6.6 Editing installation data structure .................................................................................... 85
6.6.1 Adding new locations .............................................................................................. 85
6.7 Communication ............................................................................................................... 87
6.8 Operation with barcode scanner ..................................................................................... 88
7Maintenance .......................................................................................................................... 89
7.1 Replacing fuses............................................................................................................... 89
7.2 Cleaning .......................................................................................................................... 89
7.3 Periodic calibration.......................................................................................................... 89
7.4 Service ............................................................................................................................ 89
8Technical specifications....................................................................................................... 90
8.1 Insulation resistance........................................................................................................ 90
8.2 Continuity ........................................................................................................................ 91
8.2.1 Resistance R200mA (LPE, NPE) ............................................................................ 91
8.2.2 Resistance R7mA (LPE, NPE)................................................................................ 91
8.3 RCD testing.....................................................................................................................91
8.3.1 General data............................................................................................................ 91
8.3.2 Contact voltage RCD-Uc......................................................................................... 92
8.3.3 Trip-out time ............................................................................................................92
8.3.4 Trip-out current........................................................................................................ 93
8.4 Fault loop impedance and prospective fault current........................................................ 93
8.4.1 No disconnecting device or FUSE selected ............................................................ 93
8.4.2 RCD selected .......................................................................................................... 94
8.5 Line impedance / prospective short-circuit current and Voltage drop ............................. 94
8.6 Voltage, frequency, and phase rotation........................................................................... 95
8.6.1 Phase rotation .........................................................................................................95
8.6.2 Voltage.................................................................................................................... 95
8.6.3 Frequency ............................................................................................................... 95
8.7 Online terminal voltage monitor....................................................................................... 95

MI 3101 EurotestAT Table of contents
5
8.8 Earth resistance .............................................................................................................. 95
8.9 2 line/loop impedance.................................................................................................. 96
8.9.1 High precision line impedance ................................................................................ 96
8.9.2 High precision fault loop impedance ....................................................................... 97
8.9.3 Contact voltage .......................................................................................................98
8.10 Varistor test ..................................................................................................................... 98
8.11 General data....................................................................................................................99
AAppendix A - Fuse table ..................................................................................................... 100
BAppendix B - Accessories for specific measurements ................................................... 103
CAppendix C – Locator receiver R10K ................................................................................ 104
C.1 Tracing principles .......................................................................................................... 105
C.1.1 Positioning the receiver......................................................................................... 105
C.1.2 Positioning current clamp...................................................................................... 105
C.1.3 Positioning selective probe.................................................................................... 106
C.2 Detection distances for different connections................................................................ 106
C.3 R10K power supply ....................................................................................................... 106
C.4 Maintenance.................................................................................................................. 106
DAppendix D - IT supply systems........................................................................................ 107
D.1 Standard references...................................................................................................... 107
D.2 Fundamentals................................................................................................................ 107
D.3 Measurement guides..................................................................................................... 108
D.3.1 MI 3101 test functions and IT systems.................................................................. 109
EAppendix E - Reduced low voltage supply systems ....................................................... 110
E.1 Standard reference........................................................................................................ 110
E.2 Fundamentals................................................................................................................ 110
E.3 MI 3101 guides.............................................................................................................. 110
E.3.1 MI 3101 functions and reduced low voltage systems............................................ 111
E.4 Technical specifications ................................................................................................ 113
E.4.1 RCD....................................................................................................................... 113
E.4.2 Fault loop impedance and prospective short-circuit current.................................. 115
E.4.3 Line impedance and prospective short-circuit current........................................... 117
FAppendix F – Country notes .............................................................................................. 118
F.1 List of country modifications .......................................................................................... 118
F.2 Modification issues........................................................................................................ 118
F.2.1 AT modification - G type RCD............................................................................... 118
F.2.2 ES modification - CONTINUITY LOOP Re............................................................ 119
F.2.3 IT modification - CONTINUITY LOOP Re ............................................................. 121
F.2.4 CH modification - Change L/N............................................................................... 123
GAppendix G – ES1; application of regulative UNE-202008.............................................. 124
G.1 Main menu..................................................................................................................... 124
G.1.1 Inspection..............................................................................................................124
G.2 Miscellaneous................................................................................................................ 125
G.2.1 Operation mode..................................................................................................... 125
G.3 Measurements............................................................................................................... 125
G.3.1 Inspections............................................................................................................126
G.3.2 Resistance to earth connection and equipotential bonding................................... 127
G.3.3 Fault loop impedance and prospective fault current.............................................. 130
G.3.4 Line impedance and prospective short-circuit current........................................... 132
HAppendix H – DK modifications......................................................................................... 134
H.1 Fault loop impedance and prospective fault current...................................................... 134

MI 3101 EurotestAT Preface
6
1 Preface
Congratulations on your purchase of the instrument and its accessories from METREL.
The instrument was designed on basis of rich experience, acquired through many years of
dealing with electric installation test equipment.
The multifunctional hand-held installation tester EurotestAT is intended for all tests and
measurements required for total inspection of electrical installations in buildings. In general
the following measurements and tests can be performed:
True rms voltage and frequency, phase sequence,
Insulation resistance,
Resistance to earth connection and equipotential bonding plus continuous
resistance measurement,
Line impedance / Voltage drop,
Loop impedance,
2 line/loop impedance
RCD protection,
Resistance to earth,
Tracing the installation,
Overvoltage protection devices,
Specific earth resistance measurement.
Tests can be performed on the following supply systems:
TN / TT,
IT,
110 V reduced low voltage (2 x 55 V), and
110 V reduced low voltage (3 x 63 V).
The high-resolution graphic display with backlight offers easy reading of results,
indications, measurement parameters and messages. Operation is simple and clear –
operator does not need any special training (except reading this instruction manual) to
operate the instrument.
In order for operator to be familiar enough with measurements in general and their typical
applications it is advisable to read Metrel handbook Measurements on electric installations
in theory and practice.
The instrument is equipped with all accessories necessary for comfortable testing. It is
kept in a soft carrying bag together with all accessories.

MI 3101 EurotestAT: Safety and operational considerations Warnings and notes
7
2 Safety and operational considerations
2.1 Warnings and notes
In order to reach high level of operator’s safety while carrying out various tests and
measurements using EurotestAT, as well as to keep the test equipment undamaged, it is
necessary to consider the following general warnings:
Warning on the instrument means »Read the Instruction manual with
special care to safety 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 might be impaired!
Read this user manual carefully, otherwise use of the instrument may be
dangerous for the operator, for the instrument or for the equipment under test!
Do not use the instrument and accessories if any damage is noticed!
In case a fuse has blown follow the instructions in this manual 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 and calibration procedure is allowed to be
carried out only by a competent authorized person!
Use only standard or optional test accessories supplied by your distributor!
Consider that older and some of new optional test accessories compatible with
this instrument meet overvoltage category CAT III / 300 V! It means that
maximum allowed voltage between test terminals and ground is 300 V!
Instrument contains rechargeable NiCd or NiMh battery cells. The cells should
only be replaced with the same type as defined on the battery placement label
or in this manual. Do not use standard alkaline battery cells while 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.
All normal safety precautions have to be taken in order to avoid risk of electric
shock when working on electrical installations!
Warnings related to measurement functions:
Insulation resistance
Do not touch the test object during the measurement or before it is fully
discharged! Risk of electric shock!
Automatic discharge of capacitive object will take some time after the finished
insulation resistance measurement. Warning message and actual voltage is
displayed during discharging until voltage drops below 10 V. In no case you
should disconnect test leads until tested object is completely discharged!

MI 3101 EurotestAT: Safety and operational considerations Warnings and notes
8
Notes related to measurement functions:
General
Indicator means that the selected measurement can't be performed because of
irregular conditions on input terminals.
Insulation resistance, varistor test, continuity functions and earth resistance
measurements shall be performed on de-energized objects, i.e. voltage between
test terminals should be lower than 10 V!
PASS / FAIL indication is enabled when limit is set to ON. Apply appropriate limit
value for evaluation of measurement results.
In case that only two of three wires are connected to test electrical installation, only
voltage indication between these two wires is valid.
Insulation resistance
When measuring insulation resistance between installation conductors all loads
must be disconnected and all switches closed!
The instrument automatically discharge tested object after finished measurement.
Keep the TEST key pressed for continuous measurement.
Continuity functions
Parallel resistance paths and interfering currents in measured circuit will influence
the test result!
If necessary compensate test lead resistance before performing continuity
measurement, see 5.2.3.
Measuring the resistance of wire wound components like transformer or motor
windings is possible only in continuous function (R7mA) due to great influence of
the winding inductance.
RCD functions
Parameters set in one function are also kept for other RCD functions.
The measurement of contact voltage will not trip-out RCD of tested installation if
selected rated test current is the same as rated INof observed RCD. However, the
RCD trip-out may occur and Uc measurement is affected as a result of PE leakage
currents caused by appliances that are connected to the tested installation.
The RCD trip-out current test and Uc measurement could be affected as a result of
potential fields of other earthing installations.
RCD trip-out current and time will be measured only if pretest of those functions
gives contact voltage lower than the selected conventional limit contact voltage.
L and N test terminals are reversed automatically according to detected terminal
voltage.
In case the RCD trips-out during safety pretests it is possible to continue
measurements just by recovering the RCD. Possible reasons for trip-out are
incorrect RCD sensitivity (IN) selected, relatively high leakage currents in tested
installations or defective RCD.

MI 3101 EurotestAT: Safety and operational considerations Warnings and notes
9
Z-LOOP
Fault loop impedance measurement (protection: FUSE or no protection ---) trips-out
the RCD. Use the Z-LOOP Impedance, Protection: RCD option to prevent the trip-
out.
Fault loop impedance function with selected RCD protection takes longer time to
complete but offers much better accuracy then RLsub-result in RCD: Uc function.
Specified accuracy of tested parameters is valid only if mains voltage is stable
during the measurement and no additional operating circuits are connected in
parallel.
L and N test terminals are reversed automatically according to detected terminal
voltage.
Z-LINE / Voltage drop
Measurement of ZLine-Line with the instrument test leads PE and N connected
together will generate warning of dangerous PE voltage when the TEST key is
touched but measurement is not prohibited.
Specified accuracy of tested parameters is valid only if mains voltage is stable
during the measurement and no additional operating circuits are connected in
parallel.
L and N test terminals are reversed automatically according to detected terminal
voltage.
Earth resistance
High currents and voltages in earthing could influence the measurement results.
High resistance of S and H probes could influence the measurement results. In this
case, indications Rp and Rc appear in the message field. There is no pass / fail
indication in this case.
Resistance of E measuring wire is added to the measurement result of resistance to
earth. Use only standard test accessory without extension lead for E probe.
Line tracer
Receiver R10K should always be in IND mode when working with the MI 3101
instrument.
When dealing with complex installations (long conductors or more current loops
connected in parallel), it is advisable to disconnect parts of the installation that are
not of interest at that moment. Otherwise the test signal will spread all over the
installation and the selectivity can fall to an unacceptable level.

MI 3101 EurotestAT: Safety and operational considerations Battery and charging
10
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 present on the display when the instrument is turned on.
In case the battery is weak the instrument indicates this as shown in figure 2.1. This
indication appears for a few seconds and then the instrument is turned off.
Figure 2.1: Discharged battery indication
The battery is charged whenever the power supply adapter is connected to the instrument.
Internal circuit controls charging assuring maximum battery lifetime. Power supply socket
polarity is shown in figure 2.2.
+
-
Figure 2.2: Power supply socket polarity
The instrument automatically recognizes connected power supply adapter and controls
charging.
Symbols:
Indication of battery charging
7.2 Battery voltage
7.2
Figure 2.3: Charging indication
Before opening battery / fuse compartment cover disconnect all measuring
accessories connected to the instrument and power off the instrument.
Insert cells correctly, otherwise the instrument will not operate and the batteries
could be discharged.
If the instrument is not used for longer period remove all battery cells from the
battery compartment.
Do not charge alkaline battery cells!

MI 3101 EurotestAT: Safety and operational considerations Battery and charging
11
Take into account handling, maintenance and recycling requirements that are
defined by related regulatives and manufacturer of alkaline or rechargeable
batteries!
Use only power supply adapter delivered from manufacturer or distributor of the test
equipment to avoid possible fire or electric shock!
2.2.1 New battery cells or cells unused for a longer period
Unpredictable chemical processes can occur during charging of new battery cells or cells
that were unused for a longer period (more than 3 months). Ni-MH and Ni-Cd battery cells
are affected to capacity degradation (sometimes called as memory effect). As a result the
instrument operation time can be significantly reduced.
Recommended procedure for recovering battery cells:
Procedure Notes
Completely charge the battery. At least 14h with in-built charger.
Completely discharge the battery. Can be performed with normal work with the
instrument.
Repeat the charge / discharge cycle for
at least two times. Four cycles are recommended.
Complete discharge / charge cycle is performed automatically for each cell using external
intelligent battery charger.
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 mixed with normal decrease of battery
capacity over time. Battery also loses some capacity when it is repeatedly charged /
discharged. The actual decrease of capacity versus number of charging cycles
depends on battery type and is provided in the technical specification from battery
manufacturer.

MI 3101 EurotestAT: Safety and operational considerations Standards applied
12
2.3 Standards applied
The MI 3101 EurotestAT instrument is manufactured and tested according to the following
regulations, listed below.
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
Functionality
EN 61557
Electrical safety in low voltage distribution systems up to 1000 V a.c. and
1500 V d.c. - 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 60755 General requirements for residual current operated protective devices
EN 60364-4-41
Low-voltage electrical installations - Part 4-41: Protection for safety -
Protection against electric shock
EN 60364-5-52
Low-voltage electrical installations - Part 5-52: Selection and erection of
electrical equipment - Wiring systems
IEC 62423
Type F and type B residual current operated circuit-breakers with and
without integral overcurrent protection for household and similar use
BS 7671 IEE Wiring Regulations
AS / NZ 3760 In-service safety inspection and testing of electrical equipment
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 3101 EurotestAT: Instrument description Front panel
13
3 Instrument description
3.1 Front panel
Figure 3.1: Front panel
Legend:
Switches the instrument power on or off.
1 ON / OFF The instrument automatically turns off 15 minutes after the last
key was pressed.
2 HELP Accesses help menus.
Adds new memory location.
3 F2 Confirmation of name entered in edit mode.
Enters memory editing mode.
4 F1 Deletes character on the left in edit mode.
5 MEM Handling with memory.
6 ESC Exits selected and displayed option.
7 TAB Jumps between display windows.
Cursors Selection of tested function and its working parameters.
Initiates measurements.
8 Cursor keypad
with TEST key TEST Acts also as the PE touching electrode.
9 BACKLIGHT,
CONTRAST Changes backlight level and contrast.
10 LCD 320 x 240 dots matrix display with backlight.

MI 3101 EurotestAT: Instrument description Connector panel
14
3.2 Connector panel
13
2
> 550V
4
5
Figure 3.2: Connector panel
Legend:
1 Test connector Measuring inputs / outputs, connection of measuring cables.
2 Charger socket Connection of power supply adapter.
3 PS/2 connector Communication with PC serial port and connection to optional
measuring adapters.
4 Protection cover Protects from simultaneous access to test connector and power
supply adapter socket plus communication connectors.
5 USB connector Communication with PC USB (1.1) port.
Warnings!
Maximum allowed voltage between any test terminal and ground is 600 V!
Maximum allowed voltage between test terminals is 550 V!
Maximum short-term voltage of external power supply adapter is 14 V!

MI 3101 EurotestAT: Instrument description Back panel
15
3.3 Back panel
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
56
4
1
2
3
F1
F3
F2
Fuse
Fuse
Fuse
SIZE AASIZE AA
SIZE AA
SIZE AASIZE AASIZE AA
S/N XXXXXXXX
Figure 3.4: Battery and fuse compartment
Legend:
1 Fuse F1 T 315 mA / 250 V
2 Fuse F2 T 4 A / 500 V
3 Fuse F3 T 4 A / 500 V
4 Serial number label
5 Battery cells Size AA, alkaline / rechargeable NiMH or NiCd
6 Battery holder Can be removed from the instrument

MI 3101 EurotestAT: Instrument description Bottom
16
3.4 Bottom
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
NN




Insulation resistance (EN 61557-2)
 V250V

Continuity
Trippingtime
non-delayed (time-delayed) RCDs


 
1: 0ms 300ms (500ms)
2 : 0ms 150ms (200ms)
5 : 0ms 40ms (150ms), U : 0.0V 100.0V
C
Trippingcurrent
I : 0.2 I 1.1 I AC (
t : 0ms 300ms, U : 0.0V 100.0V

 

C
   NN 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
SSCN

 

R : 0. 1999 I : 0. A . kA
L-N(L) PSC 17 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 83 2
CAT III 600V
 550V
Figure 3.5: Bottom
Legend:
1 Bottom information label
2 Neck belt openings
3 Handling side covers

MI 3101 EurotestAT: Instrument description Display organization
17
3.5 Display organization
Figure 3.6: Typical single test
display
Menu line
Result field
Test parameter
field
Message field
Terminal voltage
monitor
Function tabs
3.5.1 Terminal voltage monitor
The terminal voltage monitor displays current voltages present on the test terminals. In its
lower part messages are displayed regarding the measured voltages and selected voltage
system (see 4.4.2 Supply system).
Online voltage is displayed together with test terminal indication.
L and N test terminals are used for selected measurement.
L and PE are test terminals; N terminal should also be connected for
reference in measuring circuit.
Polarity of test voltage applied to the output terminals.
Insulation test: two measuring terminals should be shorted.
, Three-phase connection indicator.
TT / TN supply system.
IT supply system.
Reduced low voltage supply system.
Unknown supply system (atypical voltage at input terminals for selected
supply system).
L – N polarity changed.
First fault in IT supply system.
Check monitored voltages to fix the problem.

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Warning! Phase voltage on the PE terminal! Stop the activity immediately
and eliminate the fault / connection problem before proceeding with any
activity!
3.5.2 Menu line
In the menu line the name of the selected function is displayed. Additional informations
about active cursor / TEST keys and battery condition are shown.
Function name.
Time.
Active keys on cursor / TEST keypad (and TEST in this
example).
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).
3.5.3 Message field
In the message field different warnings and messages are displayed.
Warning! High voltage is applied to the test terminals.
Measurement is running, consider displayed warnings.
Conditions on the input terminals allow starting the measurement (TEST
key), consider other displayed warnings and messages.
Conditions on the input terminals do not allow starting the measurement
(TEST key), consider displayed warnings and messages.
Test leads resistance in CONTINUITY tests is not compensated, see
Chapter 5.2.3 for compensation procedure.
Test leads resistance in CONTINUITY tests is compensated.
Possibility to perform reference measurement (Zref) in ΔUsub-function.
RCD tripped-out during the measurement (in RCD functions).
Instrument is overheated, the temperature inside the instrument is higher
than the safety limit, and measurement is prohibited until the temperature
decreases under the allowed limit.
Fuse F1 has blown or not inserted (CONTINUITY and EARTH functions).
It is possible to store result(s).
High electrical noise during measurement. Results may be impaired.

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Probe resistances Rc or Rp could influence earth resistance result.
Pause activated in auto sequence test. Follow required activity for paused
test function.
3.5.4 Result field
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.
3.5.5 Other messages
Hard Reset
Instrument settings and measurement parameters/limits are set to
initial (factory) values, for more information refer to chapter 4.8.5.
Recalling original settings.
CAL ERROR! Service intervention required.
3.5.6 Sound warnings
Periodic sound Warning! Dangerous voltage on the PE terminal is detected.
Refer to chapter 5.8 for more information.
3.5.7 Help
Key:
HELP Opens help screen.
The help menu contains some basic schematic / connection diagrams to illustrate
recommended connection of the instrument to the electrical installation and information
about the instrument.
Pressing the HELP key in single test generates help screen for selected single test
function, while in other working menus the voltage system help is displayed first.
Keys in help menu:
/ Select neighbour help screen.
HELP Rotates through help screens.
ESC Exits help menu.

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20
Figure 3.7: Examples of help screen
3.5.8 Backlight and contrast adjustments
With the BACKLIGHT key backlight and contrast can be adjusted.
Click Toggle backlight intensity level.
Keep pressed for 1 s Lock 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 3.8: Contrast adjustment menu
Keys for contrast adjustment:
Reduces contrast.
Increases contrast.
TEST Accepts new contrast.
ESC Exits without changes.