METREL MI 3101 EurotestAT, MI 3101, EurotestAT Instruction Manual

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EurotestAT

MI 3101

Instruction manual

Version 5.0, HW 5; Code no. 20 751 834

Distributor:

Manufacturer:

METREL d.d. Ljubljanska cesta 77 1354 Horjul Slovenia web site: http://www.metrel.si e-mail: metrel@metrel.si

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

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

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

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

2.1 Warnings a

nd 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

3 Instrument 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 Term

inal voltage monitor......................................................................................... 17

3.5.2 Menu line

.................................................................................................................18

3.5.3 Message fie

ld .......................................................................................................... 18

3.5.4 Result field

............................................................................................................... 19

3.5.5 Other m

essages......................................................................................................19

3.5.6 Sound warnings

....................................................................................................... 19

3.5.7 Help

.........................................................................................................................19

3.5.8 Backlight an

d contrast adjustments......................................................................... 20

3.6 Carrying the

instrument................................................................................................... 21

3.7 Instrument set and acce

ssories....................................................................................... 21

3.7.1 Standard set

............................................................................................................ 21

3.7.2 Optional accessories

............................................................................................... 21

4 Instrument operation

............................................................................................................ 22

4.1 Main menu

....................................................................................................................... 22

4.2 Single test

........................................................................................................................ 23

4.3 Automatic testing

............................................................................................................. 24

4.3.1 Auto sequence num

ber main menu ........................................................................ 26

4.3.2 Auto sequence set

...................................................................................................26

4.3.3 Test parameters in auto

sequence.......................................................................... 27

4.3.4 Na

me and description of auto sequence................................................................. 28

4.3.5 Storing auto sequence settings (seq

uence, number, name)................................... 29

4.3.6 Pause flag a

nd comments in auto sequence........................................................... 30

4.3.7 Setting pause flag and co

mments...........................................................................30

4.3.8 Building an

auto sequence......................................................................................32

4.4 Miscellaneo

us.................................................................................................................. 37

4.4.1 Language

................................................................................................................ 37

4.4.2 Supply syste

m, Isc factor, RCD standard................................................................ 38

4.4.3 Me

mory ...................................................................................................................40

4.4.4 Date and time

..........................................................................................................40

4.4.5 Initial se

ttings........................................................................................................... 40

4.4.6 Co

mmunication port ................................................................................................ 43

4.4.7 Locator

.................................................................................................................... 43

4.4.8 Operator

..................................................................................................................43

5 Measureme

nts ....................................................................................................................... 45

5.1 Insulation re

sistance........................................................................................................ 45

5.2 Resistance t

o 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 Co

mpensation of test leads resistance....................................................................50

5.3 Testing RCDs

.................................................................................................................. 52

MI 3101 EurotestAT Table of contents

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 / prospe

ctive short-circuit current and Voltage drop ............................. 60

5.5.1 Line im

pedance and prospective short circuit current.............................................61

5.5.2 Voltage drop

............................................................................................................ 62

5.6 Voltage, frequency and phase sequ

ence........................................................................ 64

5.7 Resistance t

o earth ......................................................................................................... 66

5.7.1 Standard 3-wire

measurement................................................................................66

5.7.2 Specific eart

h resistance measurement .................................................................. 68

5.8 2  line/loo

p impedance.................................................................................................. 69

5.9 PE test terminal

............................................................................................................... 72

5.10 Locator

............................................................................................................................ 73

5.11 Varistor test

..................................................................................................................... 75

6 Data handling

........................................................................................................................ 77

6.1 Memory org

anization....................................................................................................... 77

6.2 Installation data

structure ................................................................................................ 77

6.3 Storing test

results........................................................................................................... 80

6.3.1 Saving results specialtie

s........................................................................................80

6.4 Recalling te

st results and parameters............................................................................. 81

6.4.1 Recalling re

sult........................................................................................................ 81

6.5 Clearing saved data

........................................................................................................ 83

6.5.1 Clearing sp

ecialties................................................................................................. 84

6.6 Editing insta

llation data structure .................................................................................... 85

6.6.1 Adding new locations

.............................................................................................. 85

6.7 Communication

............................................................................................................... 87

6.8 Operation with barcode

scanner ..................................................................................... 88

7 Maintenance

.......................................................................................................................... 89

7.1 Replacing fu

ses............................................................................................................... 89

7.2 Cleaning

.......................................................................................................................... 89

7.3 Periodic calibration

.......................................................................................................... 89

7.4 Service

............................................................................................................................ 89

8 Technical specifications

....................................................................................................... 90

8.1 Insulation re

sistance........................................................................................................ 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 curr

ent........................................................................................................ 93

8.4 Fault loop impedance and prospective fault current

........................................................ 93

8.4.1 No disconne

cting device or FUSE selected ............................................................ 93

8.4.2 RCD selected

.......................................................................................................... 94

8.5 Line impedance / prospe

ctive 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

8.8 Earth resistance .............................................................................................................. 95

8.9 2  line/loop impedance.................................................................................................. 96

8.9.1 High precision line im

pedance ................................................................................96

8.9.2 High precision fault loop

impedance .......................................................................97

8.9.3 Contact volt

age .......................................................................................................98

8.10 Varistor test

..................................................................................................................... 98

8.11 General data.................................................................................................................... 99

A Appendix A - Fuse table

..................................................................................................... 100

B Appendix B - Accessories for specific measurements

................................................... 103

C Appendix C – Locator receiver R10K

................................................................................ 104

C.1 Tracing prin

ciples .......................................................................................................... 105

C.1.1 Positioning t

he 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

D Appendix D - IT suppl

y systems........................................................................................ 107

D.1 Standard references

...................................................................................................... 107

D.2 Fundamentals................................................................................................................ 107

D.3 Measureme

nt guides..................................................................................................... 108

D.3.1 MI 3101 test functions a

nd IT systems.................................................................. 109

E Appendix 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 r

educed low voltage systems............................................ 111

E.4 Technical specificat

ions ................................................................................................ 113

E.4.1 RCD

.......................................................................................................................113

E.4.2 Fault loop impedance and prospective short-cir

cuit current.................................. 115

E.4.3 Line im

pedance and prospective short-circuit current........................................... 117

F Appendix F – Country

notes .............................................................................................. 118

F.1 List of count

ry 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

G Appendix G – ES1; ap

plication of regulative UNE-202008.............................................. 124

G.1 Main menu

..................................................................................................................... 124

G.1.1 Inspection

..............................................................................................................124

G.2 Miscellaneo

us................................................................................................................ 125

G.2.1 Operation mode

.....................................................................................................125

G.3 Measureme

nts............................................................................................................... 125

G.3.1 Inspection

s............................................................................................................ 126

G.3.2 Resistance t

o earth connection and equipotential bonding................................... 127

G.3.3 Fault loop impedance and prospective fault curr

ent.............................................. 130

G.3.4 Line im

pedance and prospective short-circuit current........................................... 132

H Appendix H – DK modifications

......................................................................................... 134

H.1 Fault loop impedance and prospective fault current

...................................................... 134

MI 3101 EurotestAT Preface

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

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

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

N

of 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

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 tripout.

 Fault loop impedance function with selected RCD protection takes longer time to

complete but offers much better accuracy then RL sub-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 Z

Line-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

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

 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

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

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.

Cursor keypad with TEST key

TEST

Acts also as the PE touching electrode.

BACKLIGHT, CONTRAST

Changes backlight level and contrast.

10 LCD 320 x 240 dots matrix display with backlight.

MI 3101 EurotestAT: Instrument description Connector panel

3.2 Connector panel

> 550V

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

3.3 Back panel

Figure 3.3: Back panel

Legend:

1 Battery / fuse compartment cover 2 Back panel information label 3 Fixing screws for battery / fuse compartment cover

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

3.4 Bottom

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

 











Insulation resistance (EN 61557-2)



V250V



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

Tripping curre nt

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









  

NN N



1.5 I A)

Multiplier: 0.5, 1, 2, 5



Cont act v oltag e

U : 0.0V 100.0V R : 0.0 0 10.0 0k (R =U / I )

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 14

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





impedance

L-PE





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: +386 1 75 58 200 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

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.

MI 3101 EurotestAT: Instrument description Display organization

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 ΔU sub-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.

MI 3101 EurotestAT: Instrument description Display organization

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.

MI 3101 EurotestAT: Instrument description Display organization

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.

MI 3101 EurotestAT: Instrument description Carrying the instrument

3.6 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.

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

3.7 Instrument set and accessories

3.7.1 Standard set

 Instrument  Soft carrying bag  Short instruction manual  Product verification data  Warranty declaration  Declaration of conformity  Universal test cable  Three test tips  Schuko plug commander

 Three alligator clips  Power supply adapter  CD with instruction manual,

handbook Measurements on electric installations in theory and practice, PC software

 USB interface cable  RS232 interface cable

3.7.2 Optional accessories

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

MI 3101 EurotestAT: Instrument operation Main menu

4 Instrument operation

4.1 Main menu

From the Main menu different instrument operation modes can be set.

 Single test menu (see 4.2),  Auto sequence menu (see 4.3),  Miscellaneous (see 4.4).

Figure 4.1: Main menu

Keys:  /  Select the mode.

TEST

Enters selected mode.

MI 3101 EurotestAT: Instrument operation Single test

4.2 Single test

is intended to run individual test /

measurement functions.

Figure 4.2: Example of typical

Single test screen

Keys in main single test screen:

 / 

Select test / measurement function:

 <VOLTAGE> Voltage and frequency plus phase sequence.  <INSULATION> Insulation resistance.  <CONTINUITY> Resistance to earth connection and equipotential

bonding.

 <Z-LINE> Line impedance.  <Z-LOOP> Fault loop impedance.  <RCD> RCD testing.  <EARTH> Resistance to earth.  <VARISTOR TEST> Transient suppressor test.

 / 

Select sub-function in selected measurement function.

TEST

Runs selected test / measurement function.

TAB

Enters test parameters field.

ESC

Exits single test operation mode.

MEM

Stores measured results / recalls stored results.

Keys in test parameter field:

 /  Select measuring parameter.  / 

Change the selected parameter.

TEST, TAB, ESC

Exit back to main single test screen.

General rule for enabling limits for evaluation of measurement / test result:

OFF

No limit comparison Limit ON – enabled comparison Limit

Limit Value – minimum / maximum limit value *

* Type of limit value depends on particular function.

See Chapter 5 for more information about operation of the instrument in single test

functions.

MI 3101 EurotestAT: Instrument operation Automatic testing

4.3 Automatic testing

is intended for automatic executing of predefined measurement sequences.

Figure 4.3: Typical auto

sequence screen

Auto sequence menu. Selected sequence number and (optional) name.

Sequence field.

Test parameter / auto sequence description field.

Saving and renaming options.

Running auto sequence:

 Select auto sequence (see 4.3.2).

 Connect the instrument to tested object as required for the first measurement in the

sequence.

 Press TEST key.  The sequence will pause at the functions marked with pause flag

Comments

regarding the paused function will be displayed (optional).

♦ Press the TAB key to toggle between comments menu and auto sequence main

menu.

♦ If the conditions at input terminals are valid, the test will proceed after pressing

the TEST key.

♦ Press the F1 key to skip the paused function. The test will continue with the

next test (if any) or will end.

♦ Press the ESC key to skip the remaining functions and finish the auto

sequence.

 The set of measurements will be performed in sequential manner until the

conditions at input terminals are valid for each individual test. If not, the instrument will stop (the buzzer sounds). The auto sequence will proceed:

♦ After correct conditions are restored at the input terminal (e.g. by reconnecting,

switching on the RCD).

♦ If pressing the F1 key this function will be skipped. ♦ By pressing the ESC key to skip the remaining functions and finish the auto

sequence.

 Results of a finished auto sequence can be viewed and stored. See chapter 6. for

more information.

MI 3101 EurotestAT: Instrument operation Automatic testing

Measurements are marked with one of the following symbol after finished test.

Measurement is finished and has failed. Measurement is finished and has passed. Measurement is finished. No comparison limit was applied. Measurement is not performed yet (during test) or was skipped.

Overall PASS result is reported if all performed tests passed.

Overall FAIL result is reported if one or more performed tests failed.

Figure 4.4: Waiting for right input condition to proceed

Figure 4.5: Overall PASS example

Figure 4.6: Overall FAIL example

Viewing auto sequence particular results:

 After finished auto sequence press the key  to move focus into sequence field.

♦ Press TEST key. ♦ Result of selected function is displayed. ♦ Press the key  (or ) to select the next function of the sequence. ♦ Repeat this part until all results are observed.

 Viewing of the results is finished by pressing the key  until selected sequence

number is focused or by pressing the ESC key.

MI 3101 EurotestAT: Instrument operation Automatic testing

4.3.1 Auto sequence number main menu

In the instrument up to 99 automatic sequences can be stored.

#3 Auto sequence number.

* Indicator that the preset sequence was changed and is

not stored yet, the auto sequence can be performed anyway.

TEST EXA1

Optional sequence name (see 4.3.4).

Indication of locked sequence (see 4.3.2).

4.3.2 Auto sequence set

Keys in main auto sequence menu:

TEST

Starts the selected test sequence. Enters / clears pause II before test.

 /  Select the test sequence number or measuring function (see 4.3.1).  /  Select individual sequence step / measuring function.

TAB

Enters test parameter field (see 4.3.3).

ESC

Exits auto sequence menu without changes.

Enters editor to rename selected test sequence and enter its description (see

4.3.4).

Enters menu for

setting pause flag and comments (see 4.3.7).

Saves entered test sequence (see 4.3.5).

MEM

Stores / recalls AUTO SEQUENCE results.

Function selection

Parameter selection

Figure 4.7: Example of setting auto sequence sequence

For each of 6 predefined sequence steps any of the following measurement function can be selected: voltage, continuity, insulation, Zline, Zloop, RCD and earth. The field can also

be left empty (- - -).

Test parameters are applied to individual measurements as in the single test. The test parameter menu of selected measurement is available on the right side of the display.

The pause

flag holds the auto sequence until prosecution is confirmed with the TEST

key. It is recommended to use it if additional checks or reconnections have to be performed before performing the next measurement.

MI 3101 EurotestAT: Instrument operation Automatic testing

The key is indication of locked sequence. This indication appears at predefined sequences that were loaded into the instrument from PC. It is possible to modify locked auto sequences and run them. However, the modified sequence cannot be stored by overwriting.

Note:

 It is recommended to save current auto sequence if modified or new prepared, to

keep it during manipulation.

4.3.3 Test parameters in auto sequence

Keys in test parameter menu (in auto sequence):

 /  Select test parameter value or enable / disable parameter.  /  Select test parameter.

TEST, TAB, ESC

Return to auto sequence main screen.

Whenever a new function is selected for auto sequence its test parameters should be verified and changed to appropriate values / states.

Test parameter merging

When the prepared sequence from section 4.3.2 contains selected at least two of Zline,

Zloop, or RCD, is possible to merge test parameters of one function to others of mentioned in the same sequence. Merged parameters are related to:

- fuse data, and

- RCD data, except start polarity of test current.

Additional Key in main auto sequence menu with selected Zline, Zloop, or RCD:

Merges test parameters.

Figure 4.8: Parameter merging possibility

MI 3101 EurotestAT: Instrument operation Automatic testing

4.3.4 Name and description of auto sequence

Enters test sequence name menu from auto sequence main menu.

Name and description for the selected auto sequence can be added or changed (optional) in this two level menu.

Figure 4.9: Auto sequence name

Keys for 1st level:

 /  Select between name and description field. TEST

Returns to auto sequence main menu.

Enters editing of selected field (2nd level).

ESC

Returns to auto sequence main menu without changes.

Figure 4.10: Auto sequence name edit

Figure 4.11: Auto sequence description edit

Keys for 2

level:

Highlighted key

Selected symbol or activity.

 /  /  /  Select symbol or activity. TEST

Enters selected symbol or performs selected activity.

Deletes last entered symbol in the name line.

Confirms name and returns to 1st level of auto sequence name menu.

ESC

Returns to 1st level of auto sequence name menu without changes.

20 characters is the maximum length of the auto sequence name. 100 characters is the maximum length of the auto sequence description.

MI 3101 EurotestAT: Instrument operation Automatic testing

4.3.5 Storing auto sequence settings (sequence, number, name)

Opens dialog for storing auto sequence settings in auto sequence main menu.

The dialog enables storing existing auto sequence settings into different location or overwriting existing.

Figure 4.12: Store dialog

Keys:

 / 

Select the auto sequence number.

TEST

Confirms the storing.

ESC

Returns to auto sequence main menu without changes.

Auto sequence settings are stored in nonvolatile memory. Stored auto sequence procedures remain in memory until the user changes them.

It is not possible to store any auto sequence in locked location. Locked auto sequence can be copied in an unlocked location. Stored sequence is unlocked in this case.

Figure 4.13: Store dialog for locked sequence

Figure 4.14: Failed storing

It is possible to unlock all locked sequences (see 4.4.5 for more information) if necessary.

MI 3101 EurotestAT: Instrument operation Automatic testing

4.3.6 Pause flag and comments in auto sequence

The auto sequence holds if a pause flag is associated with the measurement and the predefined comment is displayed. When the input conditions are regular, the auto sequence can be continued by pressing the TEST key.

Comment appears with the pause

Blinking pause flag in main screen

Figure 4.15: Examples of screens during the pause in auto sequence

Keys:

TAB

Toggles between comment screen and auto sequence main screen.

TEST

Continues with the paused test.

Skip paused test.

ESC

Skip all tests and ends auto sequence.

4.3.7 Setting pause flag and comments

Operator of the instrument can prepare comments regarding the measurements. Warnings, reconnection hints or other useful remarks related to the test sequence can be applied this way.

Enters pause set-up and comments menu for selected function in auto sequence main menu.

Set-up of comments is enabled if pause flag is set to ON.

Figure 4.16: Pause set-up menu

MI 3101 EurotestAT: Instrument operation Automatic testing

Keys:

 / 

Enable (ON) / disable (OFF) pause flag.

 /  Select between pause flag and comments fields.

TEST

Confirms pause and comment selection, and returns to auto sequence main menu.

ESC

Returns to auto sequence main menu without changes.

Comments set-up menu enables selection and editing of the pause comment.

Figure 4.17: Comments set-up

Keys:

 /  Select between setup of pause and comment.  / 

Select comment [--- (no comment), #1  #99].

Enters edit comments menu for selected comment number.

TEST

Confirms pause and comment selection and returns to auto sequence main menu.

ESC

Returns to auto sequence main menu without changes.

Comments can be entered and edited in the Edit comments menu.

Maximum comment length: 250 characters (including space and new line characters).

Figure 4.18: Comments edit

Keys:

Highlighted key

Selected symbol or activity.

 /  /  /  Select symbol or activity. TEST

Enters selected symbol or performs selected activity.

Deletes last entered symbol in the name line.

Opens dialog for comment storing.

ESC

Deletes comment (immediately after entering the editor). Returns to auto sequence main menu without changes.

MI 3101 EurotestAT: Instrument operation Automatic testing

Storing comment opens dialog for storing into selected location.

Figure 4.19: Store dialog for

comment

Keys:

 /  Select comment number. TEST

Confirms storing the comment and returns.

ESC

Returns to Edit comments menu.

Note:

 It is not possible to overwrite comments associated to locked auto sequences.

4.3.8 Building an auto sequence

The instrument supports up to 99 auto sequences, each consisting of up to 6 steps. It is not necessary that all steps are enabled. The auto sequence can be prepared in the following way:

 By storing the existing auto sequence under another auto sequence number (see

4.3.5),

 By changing an existing auto sequence and saving it under the same auto

sequence number (not possible for locked auto sequence),

 By building a new auto sequence.

Building a new auto sequence

 In the main menu (see 4.1) select auto sequence.

 Press the TEST key.

 Select auto sequence number (see 4.3.2).

 Repeat until finished (maximum 6 steps):

♦ Select auto sequence step (see 4.3.2). ♦ Select auto sequence function (see 4.3.2). ♦ Select auto sequence test parameters of the function (see 4.3.3).

♦ Set / reset pause flag IIand select or create new comment if necessary (see

4.3.7).

 Name (or rename) the auto sequence and enter its description (see 4.3.4).  Save prepared auto sequence (see 4.3.5).

MI 3101 EurotestAT: Instrument operation Automatic testing

Figure 4.20: Blank auto sequence

Example of building an auto sequence

A house installation wall socket protected with fuse (type gG, In = 6 A, td = 5 s) and RCD (type AC, I

N

= 30 mA) shall be tested.

The following measurements must be performed:

 Equipotential bonding resistance of PE terminal to main PE collector (R ≤ 0.1 ),  Insulation resistances between L – N, L – PE and N – PE (U = 500 V, R  1 M),  Voltages on the socket,  Line impedance with fuse verification,  RCD trip-out time at nominal current,  RCD trip-out time at increased current (5 x I

N

). The name of test sequence number 10 is “Sock. 6A / 30mA(AC)”. Description of the test sequence is: “Verification of wall socket, protected with fuse and RCD”.

For the measurement the following conditions shall apply:

 Equipotential bonding resistance and insulation resistance measurement has to be

performed on de-energized socket;

 Equipotential bonding resistance test (see figure 5.6) should be performed with the

universal test cable and extension lead;

 Insulation resistance test should be performed with the plug cable or commander

(see figures 5.2 and 5.3);

 Other tests have to be applied on energized test socket with the plug cable or

commander (see figures 5.13, 5.22 and 5.26).

MI 3101 EurotestAT: Instrument operation Automatic testing

Example:

Item/keys

Chapter reference

Comment

Auto sequence, TEST

4.1

Selection of auto sequence operation in main menu.

 /  4.3.1 Selection of test sequence number 10. F1

4.3.4 Enter into sequence name editing menu.

4.3.4 Enter the sequence name editor.

Sock. 6A / 30mA(AC)

4.3.4 Enter the name of auto sequence.

4.3.4 Accept name and exit into sequence name editing menu.



4.3.4 Select description of test field.

4.3.4 Enter the description of test editor.

Verification of wall socket, protected with fuse and RCD

4.3.4 Enter the description.

Accept description and exit into sequence name

editing menu.

TEST

4.3.4 Exit sequence name editing menu.



4.3 Enter into sequence field.

 /  4.3.2 Select CONTINUITY. TAB

4.3.2 Enter test parameter selection mode.

TEST R200mA Limit ON Limit 0.1

5.2

Set test parameters for equipotential bonding resistance.

TAB

4.3.2 Exit parameter mode.

4.3.2 Set PAUSE (wait to prepare for measurement).

 /  4.3.7 Set PAUSE: ON. 

4.3.7 Select COMMENT.



4.3.7 Select COMMENT: #1.

4.3.7 Enter Edit comment menu.

Disconnect mains, univ. cable + ext.

4.3.7 Enter the comment.

4.3.7 Save the comment.

TEST

4.3.7 Store the comment to location #1.



4.3.7 Select COMMENT: #2.

4.3.7 Enter Edit comment menu.

Commander

4.3.7 Enter the comment.

4.3.7 Save the comment.

TEST

4.3.7 Store the comment to location #2.



4.3.7 Select COMMENT: #3.

4.3.7 Enter Edit comment menu.

Connect mains

4.3.7 Enter the comment.

4.3.7 Save the comment.

TEST

4.3.7 Store the comment to location #3.



4.3.7 Select COMMENT: #4.

4.3.7 Enter Edit comment menu.

Turn ON RCD

4.3.7 Enter the comment.

4.3.7 Save the comment.

TEST

4.3.7 Store the comment to location #4.

MI 3101 EurotestAT: Instrument operation Automatic testing

 (3 x) 4.3.7 Select COMMENT: #1. TEST

4.3.7 Confirm selected pause and its comment.



4.3 Next step.

 /  4.3.2 Select INSULATION. TAB

4.3.2 Enter test parameter selection mode.

TEST ALL UISO 500 V Limit ON Limit 1M

5.1 Setting test parameters for insulation resistance.

TAB

4.3.2 Exit parameter mode.

4.3.2 Set PAUSE (wait to reconnect measuring leads).

 /  4.3.7 Set PAUSE: ON. 

4.3.7 Select COMMENT.

 (2 x) 4.3.7 Select COMMENT: #2. TEST

4.3.7 Confirm selected pause and its comment.



4.3 Next step.

 /  4.3.2 Select VOLTAGE. F1

4.3.2 Set PAUSE (wait to connect mains voltage).

 /  4.3.7 Set PAUSE: ON. 

4.3.7 Select COMMENT.

 (3 x) 4.3.7 Select COMMENT: #3. TEST

4.3.7 Confirm selected pause and its comment.



4.3 Next step.

 /  4.3.2 Select Z-LINE. TAB

4.3.2 Enter test parameter selection mode.

FUSE type gG FUSE I 6A FUSE T 5s

5.5

Set test parameters for line impedance and fuse test.

TAB

4.3.2 Exit parameter mode.



4.3 Next step.

 /  4.3.2 Select RCD. TAB

4.3.2 Enter test parameter selection mode.

TEST Tripout current Idn 30mA type G Ulim 50V

5.3

Test parameters for RCD trip-out current test

(results of this test are also contact voltage at I



and trip out time).

TAB

4.3.2 Exit parameter mode.



4.3 Next step.

4.3.2 Set PAUSE (wait to activate RCD).

 /  4.3.7 Set PAUSE: ON. 

4.3.7 Select COMMENT.

 (4 x) 4.3.7 Select COMMENT: #4. TEST

4.3.7 Confirm selected pause and its comment.

 /  4.3.2 Select RCD. TAB

4.3.2 Enter test parameter selection mode.

TEST Tripout time t Idn 30mA type

MUL x5 Ulim 50V

5.3

Test parameters for RCD trip out time test at 5I



(result of this test is also contact voltage at I



MI 3101 EurotestAT: Instrument operation Automatic testing

TAB

4.3.2 Exit parameter mode.

 (6 x) 4.3 Exit the editing of sequence field. F2

4.3.5 Store prepared test sequence.

TEST

4.3.5 Confirm storing.

Figure 4.21: Auto sequence screen of the example above

MI 3101 EurotestAT: Instrument operation Miscellaneous

4.4 Miscellaneous

Different instrument options can be set in the

menu.

Options are:

 Selection of language,  Selection of mains supply system,  Recalling and clearing stored results,  Setting date and time,  Selection of communication port,  Setting the instrument to initial values,  Entering locator function,  Selection of operator.

Figure 4.22: Options in Miscellaneous

Keys:

 /  /  / 

Selection of option.

TEST

Enters selected option.

ESC

Returns to the main menu.

4.4.1 Language

The instrument supports different languages.

Figure 4.23: Language selection

Keys:

 / 

Select language.

TEST

Confirms selected language and exits to settings menu.

ESC

Exits to settings menu without changes.

MI 3101 EurotestAT: Instrument operation Miscellaneous

4.4.2 Supply system, Isc factor, RCD standard

In the Voltage system menu the following parameters can be selected:

Voltage system

Mains supply system type.

Set Isc factor

Correction factor for Isc calculation (ksc).

RDC testing

RCD normative reference.

Figure 4.24: System parameters

Keys:

 / 

Select option.

 / 

Change the option.

TEST

Confirms selected option.

ESC

Exits to settings menu with new setup.

Mains supply systems

The following supplying systems are supported:

 TT / TN (earthed systems),  IT (system insulated from earth),  110 V reduced low voltage (2 x 55 V center tap grounded),  110 V reduced low voltage (3 x 63 V three phase, star center grounded).

TN, TT and IT systems are defined in EN 60364-1 standard. 110 V reduced low voltage systems are defined in BS 7671.

See Appendix D for particular characteristics of IT supply system measurements and

instrument characteristics.

See Appendix E for particular characteristics of 110 V reduced low voltage supply systems

measurements and instrument characteristics.

Isc factor - ksc

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 ksc is 1.00. Change the value as required by local regulative for tested type of mains supply system. Range for adjustment of the ksc is 0.20  3.00.

MI 3101 EurotestAT: Instrument operation Miscellaneous

RCD normative references

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

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

½I

N

2IN 5IN General RCDs (non-delayed)



> 300 ms t < 300 ms t < 150 ms t < 40 ms

Selective RCDs (time-delayed)



> 500 ms 130 ms < t < 500 ms 60 ms < t < 200 ms 50 ms < t < 150 ms

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

½I

N

2IN 5IN General RCDs (non-delayed)



> 999 ms t < 999 ms t < 150 ms t < 40 ms

Selective RCDs (time-delayed)



> 999 ms 130 ms < t < 999 ms 60 ms < t < 200 ms 50 ms < t < 150 ms

Trip-out times according to BS 7671:

½I

N

2IN 5IN General RCDs (non-delayed)



> 1999 ms t < 300 ms t < 150 ms t < 40 ms

Selective RCDs (time-delayed)



> 1999 ms 130 ms < t < 500 ms 60 ms < t < 200 ms 50 ms < t < 150 ms

Trip-out times according to AS/NZ

**)

½I

N

2IN 5IN

RCD type

N

[mA] t t



Note

 10

40 ms 40 ms 40 ms

> 10  30

300 ms 150 ms 40 ms

III > 30

> 999 ms

300 ms 150 ms 40 ms 500 ms 200 ms 150 ms

Maximum break time

> 30 > 999 ms

130 ms 60 ms 50 ms Minimum non-actuating time

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

**)

Test current and measurement accuracy correspond to AS/NZ requirements.

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

½IN I

N

2IN 5IN

EN 61008 / EN 61009 300 ms 300 ms 150 ms 40 ms EN 60364-4-41 1000 ms 1000 ms 150 ms 40 ms BS 7671 2000 ms 300 ms 150 ms 40 ms AS/NZ (I, II, III) 1000 ms 1000 ms 150 ms 40 ms

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

½IN I

N

2IN 5IN

EN 61008 / EN 61009 500 ms 500 ms 200 ms 150 ms EN 60364-4-41 1000 ms 1000 ms 200 ms 150 ms BS 7671 2000 ms 500 ms 200 ms 150 ms AS/NZ (IV) 1000 ms 1000 ms 200 ms 150 ms

MI 3101 EurotestAT: Instrument operation Miscellaneous

4.4.3 Memory

In this menu the stored data can be recalled, viewed

and cleared. See chapter 6 Data handling for more

information.

Figure 4.25: Memory options

Keys:  /  Select option.

ESC

Exits this option.

TEST

Enters selected option.

4.4.4 Date and time

Date and time can be set in this menu.

Figure 4.26: Setting date and time

Keys:



Selects the field to be changed.

 /  Modify selected field. ESC

Exits date and time setup without changes.

TEST

Confirms new setup and exits.

4.4.5 Initial settings

Instrument settings and measurement parameters and limits are set to their initial values in this menu.

Figure 4.27: Initial settings dialogue

MI 3101 EurotestAT: Instrument operation Miscellaneous

Keys:

TEST

Restores default settings.

ESC

Exits the menu without changes.

Opens other settings menu.

Warning:

 Custom made settings will be lost when this option is used!

The default setup is listed below:

Instrument setting Default value

Contrast As defined and stored by adjustment procedure Isc factor 1.00 Supply system TN / TT RCD standards EN 61008 / EN 61009 COM port RS 232 Language English

Function

Sub-function

Parameter / limit value

CONTINUITY R 200 mA

R LOW

High limit resistance value: OFF

Continuity High limit resistance value: OFF

INSULATION Nominal test voltage: 500 V

Low limit resistance value: OFF Selected test leads combination: LN

Z - LINE Fuse type: none selected ΔU Limit: 4.0 % Z

ref

: 0.00 Ω

Z - LOOP Protection: Fuse

Fuse type: none selected 2  line/loop impedance m L-N Fuse type: none selected RCD RCD t

Nominal differential current: IN=30 mA

RCD type: G

Test current starting polarity: (0)

Limit contact voltage: 50 V

Current multiplier: 1 Earth resistance 3-wire

3-wire Limit value: OFF Specific resistance Distance unit: m

Varistor test Lo limit: 300 V

Hi limit: 400 V

Other settings

Enters menu to unlock the protected auto sequences and comments and/or select distance unit for specific earth resistance measurement.

MI 3101 EurotestAT: Instrument operation Miscellaneous

Unlock protected sequences or distance unit can be selected.

Figure 4.28: Other settings dialogue

Keys:

 / 

Select other settings item.

TEST

Enters selected item.

ESC

Exits the menu without changes.

Unlocking autotests and comments

Protection flag (key) for all default auto test sequences and associated comments will be cleared.

Figure 4.29: Other settings dialogue

TEST

Unlocks locked auto test sequences.

ESC

Exits the menu without changes.

Units selection

Unit for specific earth resistance will be selected.

Figure 4.30: Other settings dialogue

 /  Select distance units. TEST

Enters selected distance units.

ESC

Exits the menu without changes.

MI 3101 EurotestAT: Instrument operation Miscellaneous

4.4.6 Communication port

The communication port (RS232 or USB) can be selected in this menu.

Figure 4.31: Communication port selection

Keys:  /  Select communication port.

TEST

Confirms selected port.

ESC

Exits without changes.

Note:

 Only one port can be active at the same time.

4.4.7 Locator

This function enables tracing electrical lines.

Keys:

TEST

Starts locator function.

ESC

Exits miscellaneous menu.

See chapter 5.10 Locator for locator operation.

4.4.8 Operator

This menu enables registering the operator of the instrument. Selected operator name appears on the bottom of the LCD during turning on of the instrument. It is also associated to stored measurement results. Up to 5 operators can be defined.

Figure 4.32: Operator menu

Keys:  / 

Select operator.

TEST

Accepts selected operator.

ESC

Exits to miscellaneous menu without changes.

Enters operators name edit menu.

MI 3101 EurotestAT: Instrument operation Miscellaneous

Operators name can be entered or modified.

Maximum 15 characters can be entered for operator.

Figure 4.33: Operator name edit menu

Keys:

Highlighted key

Selected symbol or activity.

 /  /  /  Select symbol or activity. TEST

Enters selected symbol or performs selected activity.

Deletes last entered symbol in the name line.

Confirms comment and returns to operator main menu.

ESC

Deletes operator (immediately after entering the editor). Returns to operator main menu without changes.

MI 3101 EurotestAT: Measurements Insulation

5 Measurements

5.1 Insulation resistance

Insulation resistance measurement is performed in order to assure safety against electric shock through insulation. It is covered by the EN 61557-2 standard. Typical applications are:

 Insulation resistance between conductors of installation,  Insulation resistance of non-conductive rooms (walls and floors),  Insulation resistance of ground cables,  Resistance of semi-conductive (antistatic) floors.

See chapter 4.2 Single test for functionality of keys.

Figure 5.1: Insulation resistance

Test parameters for insulation resistance measurement

TEST Test configuration [L-N, L-PE, N-PE, ‘L-PE,N-PE’, ‘L-N,L-PE’, ALL] Uiso Test voltage [50 V, 100 V, 250 V, 500 V, 1000 V]

Limit

Minimum insulation resistance [OFF, 0.1 M ÷ 200 M, (‘L-PE,N-PE’, ‘L-N,L-PE’, ALL: 20 M)]

Test circuits for insulation resistance

L1 L2

L3 N PE

mains voltage

switched off

closed switches

loads disconnected

N/L2

PE/L3

Figure 5.2: Connection of universal test cable for general insulation resistance

measurement (TEST: L-PE)

MI 3101 EurotestAT: Measurements Insulation

L1 L2 L3 N PE

LPEN

mains voltage

switched off

loads disconnected

Figure 5.3: Application of plug commander and universal test cable for insulation

resistance measurement (TEST: ‘L-PE,N-PE’, ‘L-N,L-PE’, ALL)

Insulation resistance measuring procedure

 Select the INSULATION function.  Set test parameters.  Enable and set limit value (optional).  Disconnect tested installation from mains supply (and discharge tested insulation).  Connect test cable to the instrument and tested item (see figures 5.2 and 5.3).  Press the TEST key for measurement (keep pressing for continuous

measurement).

 After the measurement is finished wait until tested item is discharged.  Store the result (optional).

Figure 5.4: Examples of insulation resistance measurement results

Displayed results:

Rln ..........Insulation resistance between L (+) and N (-).

Rlpe ........Insulation resistance between L (+) and PE (-).

Rnpe .......Insulation resistance between N (+) and PE (-).

Um ..........Test voltage(s) – actual value(s).

Note:

 Follow the correct test wiring as indicated in terminal voltage monitor

when the particular insulation test is selected. If only two test wires are connected, and L-N, L-PE or N-PE test is selected, then technical specification for INSULATION ALL applies.

MI 3101 EurotestAT: Measurements Continuity

5.2 Resistance to earth connection and equipotential bonding

The resistance measurement is performed in order to assure that protective measures against electric shock through earth bond connections are effective. Four subfunctions are available:

 Earth bond resistance measurement according to EN 61557-4 (between N and PE

terminals, test current >200 mA),

 Earth bond resistance measurement according to EN 61557-4 (between L and PE

terminals, test current >200 mA),

 Continuous resistance measurement with lower test current (between N and PE

terminals, test current ca 7 mA),

 Continuous resistance measurement with lower test current (between L and PE

terminals, test current ca 7 mA).

See chapter 4.2 Single test for functionality of keys.

Figure 5.5: Continuity

Test parameters for resistance measurement

TEST Resistance measurement sub-function [R200mA NPE, R7mA NPE, R200mA

LPE, R7mA LPE]

Limit

Maximum resistance [OFF, 0.1  ÷ 20.0 ]

5.2.1 Continuity R200 mA measurement

The resistance measurement is performed with automatic polarity reversal of the test voltage.

MI 3101 EurotestAT: Measurements Continuity

Test circuit for Continuity R200mA measurement

PCC1

PCC2

PCC3

PE/L3

L/L1

MPEC

MPEC....Main Potential Equilizing Collector

PCC....Protection Conductor Collector

extension lead

N/L2

Figure 5.6: Connection of universal test cable plus optional extension lead

Resistance to earth connection and equipotential bonding measurement procedure

 Select the CONTINUITY function.  Set sub-function R200mA (L-PE or N-PE).  Enable and set limit (optional).  Connect test cable to the instrument.  Compensate test leads resistance (if necessary).  Disconnect from mains supply and discharge tested installation.

 Connect test leads to the tested PE wiring (see figure 5.6).

 Press the TEST key for measurement.  After the measurement is finished store the result (optional).

Figure 5.7: Example of continuity R200mA result

Displayed results:

R..............Main R200mA resistance (average of R+ and R- results),

R+............R200mA sub-resistance with positive voltage at N terminal,

R- ............R200mA sub-resistance with positive voltage at PE terminal.

MI 3101 EurotestAT: Measurements Continuity

5.2.2 7 mA resistance measurement

In general this function serves as standard -meter with low test current. The measurement is performed continuously without pole reversal. The function can also be applied for testing continuity of inductive components.

Test circuit for continuous resistance measurement

zTx

Figure 5.8: Universal test cable application

Continuous resistance measurement procedure

 Select the CONTINUITY function.  Set sub-function R 7mA (L-PE or N-PE).  Enable and set limit (optional).  Connect test cable to the instrument.  Compensate test leads resistance (if necessary).  Disconnect from mains supply and discharge tested object.

 Connect test leads to the tested object (see figure 5.8).

 Press the TEST key for continuous measurement.  Press the TEST key to stop measurement.  After the measurement is finished store the result (optional).

Figure 5.9: Example of 7 mA resistance measurement

Displayed result:

R..............Resistance.

MI 3101 EurotestAT: Measurements Continuity

5.2.3 Compensation of test leads resistance

This chapter describes common principle for compensation of test leads resistance for both CONTINUITY functions. The compensation is required to eliminate the influence of test leads resistance plus internal resistances of the instrument. The lead compensation is

very important to obtain correct result. The compensation status ( / ) is indicated

in the message field.

Key:

Enters test leads resistance compensation menu for any of mentioned functions.

See chapter 4.2 Single test for functionality of keys.

Figure 5.10: Test leads resistance

compensation menu

Keys:

TEST

Performs compensation

 /  Sets function to be compensated

The instrument compensates following Continuity subfunctions.

Compensation NPE Same compensation for both 7 mA and 200 mA measurements.

Short N and PE terminals.

Compensation LPE Same compensation for both 7 mA and 200 mA measurements.

Short L and PE terminals

MI 3101 EurotestAT: Measurements Continuity

Circuits for compensating the resistance of test leads

extension lead

Figure 5.11: Shorted test leads-examples for N-PE

Compensation of test leads resistance procedure

 Select the CONTINUITY function (any).

 Connect test cable to the instrument and short N/PE or L/PE terminals (see figure

5.11).

 Press the F1 key to open test leads resistance compensation menu.  Press the TEST key for measurement and compensation of test leads resistance.  Press the ESC key to return to function menu.

Note:

 20  is limit value for test leads resistance compensation.

MI 3101 EurotestAT: Measurements Testing RCD

5.3 Testing RCDs

Various test and measurements are required for verification of RCD(s) in RCD protected installations. Measurements are based on the EN 61557-6 standard.

The following measurements and tests (sub-functions) can be performed:

 Contact voltage,  Trip-out time,  Trip-out current,  RCD autotest.

See chapter 4.2 Single test for functionality of keys.

Figure 5.12: RCD test

Test parameters for RCD test and measurement

TEST RCD sub-function test [Tripout time t, Uc, AUTO, Tripout current]. Idn

Rated RCD residual current sensitivity IN[10 mA, 30 mA, 100 mA, 300 mA, 500 mA, 1000 mA].

type

RCD type [ , ], test current waveform plus starting polarity [ , , ,

, ,

MUL Actual test current relative to rated Idn [½, 1, 2, 5]. Ulim Conventional touch voltage limit [25 V, 50 V].

The instrument is intended for testing of General (non-delayed) and Selective (timedelayed) RCDs, which are suited for:

 Alternating residual current (AC type, marked with symbol),  Pulsating residual current (A type, marked with symbol).

 DC residual current (B type, marked with

symbol

)

Time delayed RCDs demonstrate delayed response characteristics. They contain residual current integrating mechanism for generation of delayed trip out. However, contact voltage pre-test in the measuring procedure also influences the RCD and it takes a period to recover into idle state. Time delay of 30 s is inserted before performing trip-out test to recover RCD after pretests.

MI 3101 EurotestAT: Measurements Testing RCD

Circuits for testing RCD

L1 L2 L3 N

LPEN

Figure 5.13: Connecting the plug commander and the universal test cable

5.3.1 Contact voltage (RCD Uc)

A current flowing into the PE terminal causes a voltage drop on earth resistance, i.e. voltage difference between PE equipotential bonding circuit and earth. This voltage difference is called contact voltage. The voltage is present on all accessible conductive parts connected to the PE. It should always be lower than the conventional safety limit voltage. The contact voltage is measured with a test current lower than ½ IN to avoid tripout of the RCD and then normalized to the rated IN.

Contact voltage measurement procedure

 Select the RCD function.  Set sub-function Uc.  Set test parameters (if necessary).  Connect test cable to the instrument.

 Connect test leads to the tested object (see figure 5.13).

 Press the TEST key.  After the measurement is finished store the result (optional).

Displayed contact voltage relates to the rated nominal residual current of the RCD and is multiplied by appropriate factor. Common factor of 1.05 is applied to avoid negative tolerance of result, additional depend on RCD type and type of test current. See table 5.1 for detailed contact voltage calculation.

RCD type

Contact voltage Uc proportional to

Rated I

N

AC G

1.05IN

21.05IN

any

A G

1.41.05IN

21.41.05IN

 30 mA

A G

21.05IN

221.05IN

< 30 mA

B G

21.05IN

221.05IN

any

Table 5.1: Relationship between Uc and I



MI 3101 EurotestAT: Measurements Testing RCD

Loop resistance is indicative and calculated from Uc result (without additional proportional

factors) according to:





Figure 5.14: Example of contact voltage measurement results

Displayed results:

Uc....... Contact voltage.

Rl........ Fault loop resistance.

5.3.2 Trip-out time (RCD t)

Trip-out time measurement verifies the sensitivity of an RCD at different residual currents.

Trip-out time measurement procedure

 Select the RCD function.  Set sub-function Tripout time t.  Set test parameters (if necessary).  Connect test cable to the instrument.

 Connect test leads to the tested object (see figure 5.13).

 Press the TEST key.  After the measurement is finished store the result (optional).

Figure 5.15: Example of trip-out time measurement results

Displayed results:

t .......... Trip-out time,

Uc....... Contact voltage for rated IN.

MI 3101 EurotestAT: Measurements Testing RCD

Note:

 See 4.4.2 RCD standard for selection of appropriate standard test conditions.

5.3.3 Trip-out current (RCD I)

A continuously rising residual current is intended for testing the threshold sensitivity for RCD trip-out. The instrument increases the test current in small steps through appropriate range as follows:

Slope range

RCD type

Start value End value

Waveform

0.2IN 1.1IN

Sine A (IN  30 mA) 0.2IN 1.5IN A (IN = 10 mA) 0.2IN 2.2IN

Pulsed

0.2IN 2.2IN

Maximum test current is I (trip-out current) or end value in case the RCD didn’t trip-out.

Trip-out current measurement procedure

 Select the RCD function.  Set sub-function Tripout current.  Set test parameters (if necessary).  Connect test cable to the instrument.

 Connect test leads to the tested object (see figure 5.13).

 Press the TEST key.  After the measurement is finished store the result (optional).

Trip-out

After the RCD is turned on again

Figure 5.16: Trip-out current measurement result example

Displayed results:

I .......... Trip-out current,

Uci ...... Contact voltage at trip-out current I or end value in case the RCD didn’t trip,

t .......... Trip-out time.

MI 3101 EurotestAT: Measurements Testing RCD

5.3.4 RCD Autotest

RCD autotest function is intended to perform complete RCD testing and measurement of belonging parameters (contact voltage, fault loop resistance and trip-out time at different residual currents) in one set of automatic tests, guided by the instrument. If any false parameter is noticed during the RCD autotest, then individual parameter test has to be used for further investigation.

RCD autotest procedure

RCD Autotest steps Notes

 Select the RCD function.  Set sub-function AUTO.  Set test parameters (if necessary).  Connect test cable to the instrument.

 Connect test leads to the tested object (see figure 5.13).

 Press the TEST key. Start of test  Test with ½I

N

, 0 (step 1).

RCD should not trip-out

 Test with ½I

N

, 180 (step 2).

RCD should not trip-out

 Test with I

N

, 0 (step 3).

RCD should trip-out

 Re-activate RCD.  Test with I

N

, 180 (step 4).

RCD should trip-out

 Re-activate RCD.  Test with 5I

N

, 0 (step 5).

RCD should trip-out

 Re-activate RCD.  Test with 5I

N

, 180 (step 6).

RCD should trip-out

 Re-activate RCD.  After the measurement is finished store the result (optional). End of test

Result examples:

Step 1

Step 2

MI 3101 EurotestAT: Measurements Testing RCD

Step 3

Step 4

Step 5

Step 6

Figure 5.17: Individual steps in RCD autotest

Displayed results:

.... Step 1 trip-out time (½IN, 0º),

.... Step 2 trip-out time (½IN, 180º),

... Step 3 trip-out time (IN, 0º), ... Step 4 trip-out time (IN, 180º), ... Step 5 trip-out time (5IN, 0º), ... Step 6 trip-out time (5IN, 180º),

Uc....... Contact voltage for rated I

N.

Notes:

 The autotest sequence is immediately stopped if any incorrect condition is detected,

e.g. excessive Uc or trip-out time out of bounds.

 Auto test is finished without tests in case of testing the RCD type A with rated

residual currents of I

n = 300 mA, 500 mA, and 1000 mA. In this case auto test

result passes if all previous results pass, and indications

and are omitted.

MI 3101 EurotestAT: Measurements Fault loop impedance

5.4 Fault loop impedance and prospective fault current

Fault loop is a loop comprising mains source, line wiring and PE return path to the mains source. The instrument has ability to measure impedance of mentioned loop and calculate short circuit current and contact voltage regarding the selected circuit breaker type. The measurement is covered by requirements of the EN 61557-3 standard.

See

4.2 Single test for active keys.

Figure 5.18: Fault loop

impedance

Test parameters for fault loop impedance measurement

Protection Selection of main protection device in fault loop [RCD, FUSE]* Fuse type Selection of fuse type [---, NV, gG, B, C, K, D] ** Fuse I Rated current of selected fuse Fuse T. Maximum breaking time of selected fuse Isc_lim Minimum short circuit current for selected fuse combination. See Appendix A for reference fuse data. * Select RCD to prevent trip-out of RCD in RCD protected installation. ** --- Means no fuse selected.

Circuits for measurement of fault loop impedance

L1 L2 L3 N

LPEN

Figure 5.19: Connection of plug cable and universal test cable

MI 3101 EurotestAT: Measurements Fault loop impedance

Fault loop impedance measurement procedure

 Select the Z-LOOP function.  Select test parameters (optional).  Connect test cable to the EurotestAT.

 Connect test leads to the tested object (see figure 5.19).

 Press the TEST key.  After the measurement is finished store the result (optional).

Figure 5.20: Examples of loop impedance measurement result

Displayed results:

Z ..............Fault loop impedance,

ISC ............Prospective fault current,

R..............Resistive part of loop impedance,

Xl .............Reactive part of loop impedance.

Prospective fault current ISC is calculated from measured impedance as follows:

kUn





where:

Un ........Nominal U

L-PE

voltage (see table below),

ksc ....... Correction factor for Isc (see chapter

4.4.2).

Un Input voltage (L-PE)

110 V

(93 V

 U

L-PE

 134 V)

230 V

(185 V  U

L-PE

 266 V)

Notes:

 High fluctuations of mains voltage influence the measurement results. The noise

sign is displayed in the message field in such case. Repeat the measurement.

 Isc is not calculated in case the terminal voltage monitor does not detect voltage

state that corresponds to the selected supply system, indication .



This measurement will trip-out RCD in RCD-protected electrical installation if FUSE is selected as breaking device instead of RCD.

MI 3101 EurotestAT: Measurements Line impedance / Voltage drop

5.5 Line impedance / prospective short-circuit current and Voltage drop

Line impedance is measured in loop comprising of mains voltage source and line wiring. It is covered by the requirements of the EN 61557-3 standard. The Voltage drop sub-function is intended to check that a voltage in the installation stays above acceptable levels if the highest current is flowing in the circuit. The highest current is defined as the nominal current of the circuit's fuse. The limit values are described in the standard EN 60364-5-52.

Sub-functions:

 Z-LINE – Line impedance measurement according to EN 61557-3,  ΔU – Voltage drop measurement.

Figure 5.21: Line impedance

See 4.2 Single test for keys functionality.

Figure 5.22: Voltage drop

Test parameters for line impedance measurement

TEST Selection of sub-function [Z, ΔU] FUSE Type Selection of fuse type [---, NV, gG, B, C, K, D] * FUSE I Rated current of selected fuse FUSE T Maximum breaking time of selected fuse Isc_lim Minimum short circuit current for selected fuse combination. See Appendix A for reference fuse data. *--- Means no fuse selected

Additional test parameters for voltage drop measurement Limit Maximum voltage drop [3.0 % ÷ 9.0 %].

MI 3101 EurotestAT: Measurements Line impedance / Voltage drop

5.5.1 Line impedance and prospective short circuit current

Circuit for measurement of line impedance

L1 L2 L3 N

LPEN

N/L2

PE/L3

Figure 5.23: Phase-neutral or phase-phase line impedance measurement – connection of

plug commander and universal test cable

Line impedance measurement procedure

 Select the Z-LINE function.  Select the Z sub-function.  Select test parameters (optional).  Connect test cable to the instrument.

 Connect test leads to the tested object (see figure 5.23).

 Press the TEST key.  After the measurement is finished store the result (optional).

Line to neutral

Line to line

Figure 5.24: Examples of line impedance measurement result

Displayed results:

Z ..............Line impedance,

ISC ............Prospective short-circuit current,

R..............Resistive part of line impedance,

XL............Reactive part of line impedance.

Prospective short circuit current is calculated as follows:

kUn





where:

Un ........Nominal L-N or L1-L2 voltage (see table below),

MI 3101 EurotestAT: Measurements Line impedance / Voltage drop

ksc ....... Correction factor for Isc (see chapter 4.4.2).

Un Input voltage range (L-N or L1-L2)

110 V

(93 V  U

L-N

 134 V)

230 V

(185 V  U

L-N

 266 V)

400 V

(321 V  U

L-L

 485 V)

Note:

 High fluctuations of mains voltage influence the measurement results. The noise

sign is displayed in the message field in this case. Repeat the measurement.

 Isc is not calculated in case the terminal voltage monitor does not detect voltage

state that corresponds to the selected supply system, indication

5.5.2 Voltage drop

The voltage drop is calculated based on the difference of line impedance at connection points (sockets) and the line impedance at the reference point (usually the impedance at the switchboard).

Circuits for voltage drop measurement

Figure 5.25: Phase-neutral or phase-phase voltage drop measurement – connection of

plug commander and 3-wire test lead

Voltage drop measurement procedure

Step 1: Measuring the impedance Zref at electrical installation origin

 Select the Z-LINE function.  Select the ΔU sub-function.  Select test parameters (optional).  Connect test cable to the instrument.  Connect the test leads to the origin of electrical installation (see figure 5.25).  Press the F1 key to perform the measurement of Zref.

Step 2: Measuring the voltage drop

 Keep the ΔU sub-function selected.  Select test parameters (Fuse type must be selected).  Connect test cable or plug commander to the instrument.  Connect the test leads to the tested points (see figure 5.25).  Press the TEST key to perform the measurement.  After the measurement is finished Store the result (optional).

MI 3101 EurotestAT: Measurements Line impedance / Voltage drop

Step 1 - Zref Step 2 - Voltage drop Figure 5.26: Examples of voltage drop measurement result

Displayed results:

ΔU ...........Voltage drop,

ISC............Prospective short-circuit current,

Z ..............Line impedance at measured point,

Zref..........Reference impedance

Voltage drop is calculated as follows:



100

)(

% 





NREF

IZZ

where:

ΔU........ calculated voltage drop

Z ..........impedance at test point

REF

......impedance at reference point

IN..........rated current of selected fuse

........nominal voltage (see table below)

Input voltage range (L-N or L1-L2)

110 V

(93 V  U

L-N

 134 V)

230 V

(185 V

 U

L-N

 266 V)

400 V

(321 V

 U

L-L

 485 V)

Note:

 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 F1 key while instrument is not

connected to a voltage source.

 I

is calculated as described in chapter 5.5.1 Line impedance and prospective

short circuit current.

 If the measured voltage is outside the ranges described in the table above the ΔU

result will not be calculated.

 High fluctuations of mains voltage can influence the measurement results (the noise

sign is displayed in the message field). In this case it is recommended to repeat few measurements to check if the readings are stable.

MI 3101 EurotestAT: Measurements Voltage, frequency, phase sequence

5.6 Voltage, frequency and phase sequence

Voltage and frequency measurement is always active in the terminal voltage monitor. In the special voltage menu the measured voltage, frequency and information about detected three-phase connection can be stored. Phase sequence measurement conforms to the EN 61557-7 standard.

See 4.2 Single test for keys functionality

Figure 5.27: Voltage in single

phase system

Test parameters for voltage measurement

There are no parameters.

Circuits for voltage measurement

L3 L2 L1 N PE

result 1.2.3 result 2.1.3

Figure 5.28: Connection of universal test cable and optional adapter in three-phase system

L1 L2 L3 N

LPEN

N/L2

PE/L3

Figure 5.29: Connection of plug commander and universal test cable in single-phase

system

MI 3101 EurotestAT: Measurements Voltage, frequency, phase sequence

Voltage measurement procedure

 Select the VOLTAGE function.  Connect test cable to the instrument.

 Connect test leads to the tested object (see figures 5.28 and 5.29).

 Store current measurement result (optional).

Measurement runs immediately after selection of VOLTAGE function.

Figure 5.30: Examples of voltage measurement in three-phase system

Displayed results for single phase system:

Uln...........Voltage between phase and neutral conductors,

Ulpe.........Voltage between phase and protective conductors,

Unpe........Voltage between neutral and protective conductors,

f ...............frequency.

Displayed results for three-phase system:

U12..........Voltage between phases L1 and L2,

U13..........Voltage between phases L1 and L3,

U23..........Voltage between phases L2 and L3,

1.2.3 ........Correct connection – CW rotation sequence,

3.2.1 ........Invalid connection – CCW rotation sequence,

f ...............frequency.

MI 3101 EurotestAT: Measurements Resistance to earth

5.7 Resistance to earth

Resistance to earth is important for protection against electric shock. This function is intended for verification of earthing of house installation and other earthings, e.g., earthing for lighting. The measurement conforms to the EN 61557-6 standard. The following resistance to earth sub-functions are available:

 Standard 3-wire, for standard resistance to earth measurements.  Specific earth resistance by using optional external adapter.

See 4.2 Single test for keys functionality.

Figure 5.31: Resistance to earth

Test parameters for earth resistance measurement

TEST

Test configuration [3-wire, ]

Limit

Maximum resistance [OFF, 1  ÷ 5 k] If  selected: Distance Distance between probes [0.1 m ÷ 30.0 m] or [1 ft ÷ 100 ft]

5.7.1 Standard 3-wire measurement

Circuits for measuring resistance to earth

MPEC

Rc Rp R

d>5d

blue - N

b - Llack

green - PE

Figure 5.32: Resistance to earth measurement – PE grounding

MI 3101 EurotestAT: Measurements Resistance to earth

blue - N

black - L

green - PE

MPEC

>5d

RpRc

Figure 5.33: Resistance to earth measurement – lighting protection

Resistance to earth measurement procedure

 Select the EARTH function.  Enable and set limit (optional).  Connect test cable to the instrument.  Disconnect tested object from mains supply.

 Connect test leads to the tested object (see figures 5.32 and 5.33).

 Press the TEST key.  After the measurement is finished store the result (optional).

Figure 5.34: Example of resistance to earth measurement result

Displayed results for earth resistance measurement:

R..............Earth resistance,

Rc............Resistance of S probe,

Rp............Resistance of H probe.

MI 3101 EurotestAT: Measurements Resistance to earth

5.7.2 Specific earth resistance measurement

The measurement is intended for measuring specific earth resistance by using special adapter A1199.

Circuit for specific earth resistance measurement

aaa

EES

a/20 max.

black

Figure 5.35: Specific earth resistance measurement with -adapter

Specific earth resistance measurement procedure

 Select the EARTH function.  Connect -adapter to the instrument.  Select  measurement.  Select distance unit (optional).  Set distance (optional).

 Connect test leads of -adapter to tested object (see figure 5.35)

 Press the TEST key.  After the measurement is finished, store the result (optional).

Figure 5.36: Example of specific earth resistance measurement result

Displayed results for earth resistance measurement:

 ..............Specific earth resistance.

MI 3101 EurotestAT: Measurements 2



line/loop impedance

Note:

 Distance units can be selected in Miscellaneous/Initial settings/Other settings menu,

see 4.4.5.

5.8 2  line/loop impedance

The measurement extends application range of the instrument and is performed with Impedance adapter A1143 connected to the instrument via RS 232 interface. It is automatically recognized in Z-LINE and Z-LOOP functions. With this adapter, low impedances up to 1999 m can be measured. The measurement is covered by requirements of the EN 61557-3 standard.

See chapter 4.2 Single test for functionality of keys.

Figure 5.37: Impedance adapter

connected

Test parameters for 2  line/loop impedance measurement

Function Z-LINE Test

Impedance function [m L-N, m L-L] Functions Z-LINE and Z-LOOP FUSE type Selection of fuse type [---, NV, gG, B, C, K, D] * FUSE I Rated current of selected fuse FUSE T Maximum breaking time of selected fuse Isc_lim Minimum short circuit current for selected fuse combination. See Appendix A for reference fuse data. *--- Means no fuse selected

Additional key:

Toggles between result screens.

Test setup for 2  line/loop impedance measurement

MI 3101 EurotestAT: Measurements 2



line/loop impedance

PS/2

RS 232

Figure 5.38: Connection of impedance adapter to the instrument

2  line/loop impedance measuring procedure

 Connect Impedance adapter to the instrument (see figure 5.38).

 Select the functions Z-LINE or Z-LOOP.  Enable and set limit value (optional).  Power ON the Impedance adapter (ON/OFF key, green LED will lit).  Connect Impedance adapter to tested installation.  Press the TEST key for measurement.  Store the result (optional).

Figure 5.39: Example of 2  line/loop measurement results

Displayed results:

Z ........................ Line / loop impedance,

ISC ...................... Prospective short-circuit current,

R........................ Resistive part of line impedance,

Xl ....................... Reactive part of line impedance.

The following parameters are displayed in sub-screen for single-phase line impedance measurement:

IscMaxL-N ......... Maximum prospective short-circuit current.

IscMinL-N .......... Minimum prospective short-circuit current.

IscStd ................ Standard prospective short-circuit current.

When testing phase-to-phase line impedance the following parameters are displayed in sub-screen:

MI 3101 EurotestAT: Measurements 2



line/loop impedance

IscMax3Ph......... Maximum three-phase prospective short-circuit current.

IscMin3Ph.......... Minimum three-phase prospective short-circuit current.

IscMax2Ph......... Maximum two-phase prospective short-circuit current.

IscMin2Ph.......... Minimum two-phase prospective short-circuit current.

IscStd ................ Standard prospective short-circuit current.

The following parameters are displayed in sub-screen for loop impedance measurement:

IscMaxL-Pe ....... Maximum prospective fault current.

IscMinL-Pe ........ Minimum prospective fault current.

IscStd ................ Standard prospective fault current.

Ub...................... Contact voltage at maximum prospective fault current (Contact

voltage is measured against probe S).

Notes:

 For application and technical data of the Impedance adapter A1143, see its user

manual 20750859

 High fluctuations of mains voltage can influence the measurement results.

Check adapter indications in case the abort symbol appears after the start of measurement.

MI 3101 EurotestAT: Measurements PE test terminal

5.9 PE test terminal

It can happen that a dangerous voltage is applied to the PE wire or other accessible metal parts. This is a very dangerous situation since the PE wire and MPEs are considered to be earthed. A common reason for this fault is incorrect wiring (see examples below). When touching the TEST key in all functions that require mains supply the user automatically performs this test.

Examples for application of PE test terminal

L1 N PE

Reversed phase and protection conductors!

T MOST DANGEROUS SITUATION!

Figure 5.40: Reversed L and PE conductors (application of plug commander)

L1 N

Reversed phase and protection conductors!

MOST DANGEROUS SITUATION!

LPEN

Figure 5.41: Reversed L and PE conductors (application of universal test cable)

MI 3101 EurotestAT: Measurements Locator

PE terminal test procedure

 Connect test cable to the instrument.

 Connect test leads to the tested object (see figures 5.40 and 5.41).

 Touch PE test probe (the TEST key) for at least one second.  If PE terminal is connected to phase voltage the warning message is displayed,

instrument buzzer is activated, and further measurements are disabled in Z-LOOP and RCD functions.

Warning:

 If line voltage is detected on the tested PE terminal, immediately stop all

measurements, find and remove the fault!

Notes:

 In main and miscellaneous menus the PE terminal is not tested.  PE test terminal does not operate in case the operator’s body is completely

insulated from floor or walls!

5.10 Locator

This function is intended for tracing mains installation, like:

 Tracing lines,  Finding shorts, breaks in lines,  Detecting fuses.

The instrument generates test signals that can be traced with the handheld tracer receiver R10K. See

Locator appendix for additional information.

Figure 5.42: Locator entry point

Parameters for locator

There are no parameters.

MI 3101 EurotestAT: Measurements Locator

Typical applications for tracing electrical installation

LPEN

Figure 5.43: Tracing wires under walls and in cabinets

Selective probe

Energized installation

Receiver R10K

Figure 5.44: Locating individual fuses

Line tracing procedure

 Select the LOCATOR function in MISC menu.  Connect test cable to the instrument.

 Connect test leads to the tested object (see figures 5.43 and 5.44).

 Press the TEST key.  Trace lines with receiver (in IND mode) or receiver plus its optional accessory.  After tracing is finished press the ESC key to stop generating test signal.

LOCATOR

Figure 5.45: Locator active

MI 3101 EurotestAT: Measurements Varistor test

5.11 Varistor test

This test is performed to verify overvoltage protection devices. Typical devices are:

 Metal oxide varistors,  Gas arresters,  Semiconductor transient voltage suppressors.

See chapter 4.2 Single test for functionality of keys.

Figure 5.46: Varistor test menu

Test parameters for varistor test

Lo limit Low limit DC threshold voltage [50 V ÷ 1000 V] Hi limit High limit DC threshold voltage [50 V ÷ 1000 V] It = 1.00 mA

Threshold current

Test circuit for varistor test

L1 L2

L3 N PE

mains voltage

switched off

opened switches

N/L2

PE/L3

permanent

loads

disconnected

Figure 5.47: Connection of universal test cable for varistor test

MI 3101 EurotestAT: Measurements Varistor test

Varistor test procedure

 Select the VARISTOR TEST function.  Set test parameters.  Disconnect mains supply and consumers from tested overvoltage device.  Connect test cable to the instrument and tested item (see figure 5.47).  Press the TEST key for measurement.  After the measurement is finished wait until tested item is discharged.  Store the result (optional).

Figure 5.48: Example of varistor test result

Displayed results:

U .............Measured threshold voltage at It (1 mA).

Uac .........Rated AC voltage.

Uac is calculated from U according to: Uac = U/1.6.

MI 3101 EurotestAT: Data handling Memory organization

6 Data handling

6.1 Memory organization

The following data can be stored in instrument memory:

 Auto sequence name, sequence, and function parameters,  Auto sequence and single test results with belonging parameters,  Installation structure with belonging data.

Stored data can be organized according to the installation structure of the tested object. Measured results can be stored into corresponding location of the structure.

6.2 Installation data structure

This functionality helps to organize operation with data in a simple and effective manner. The memory organization can be customized according to the actual structure of the tested electrical installation. Main benefits are:

 Test results can be organized and grouped in a structured manner that equals the

structure of the tested electrical installation. If a test plan for verification of electrical installation is prepared it is possible to organize the data structure according to it. Each tested location place like room, floor, installation node, switchgear, etc. can be reflected as its own location in memory.

 Simple browsing through structure and results.  Test reports can be created with no or little modifications after downloading results

to a PC.

 Test procedures can be prepared in advance on the PC and sent to the instrument.  A new installation structure can be built on the instrument  An existing structure can be upgraded on the instrument.  A name can be assigned to each location.

The data structure can be accessed and updated in each of the three main memory menus (store, recall, clear memory), but also through tree structure view.

Basic view

Tree structure view

Figure 6.1: Example of data structure fields

MI 3101 EurotestAT: Data handling Installation data structure

Figure 6.2: Installation structure example as presented on PC

Legend:

Memory operation menu Installation data structure field Root level in the structure:

 METREL d.d.: 1

level location name.

 1/1: No. of selected / available locations on this level.

Sub-level (level 2) in the structure:

 PRODUCT.: sub-location name.  2/5: No. of selected / available locations on this level.

Sub-level (level 3) in the structure:

 3PH SOCKET: location name.  1/3: No. of selected / available locations on this level.

Results field – stored results in the selected location.

   

Arrows point to existing non-displayed structure locations. Available memory information. No. of stored test results in selected location / No. of all stored test results (in complete structure). Option for opening the structure tree view.

Options for modification of the structure (see chapter 6.6).

Note:

 Only three locations in the installation data structure field (placed horizontally) can

be displayed at the same time in the basic view.

MI 3101 EurotestAT: Data handling Installation data structure

Keys:  /  /  / 

Select the existing location.



Pressed for 2 s opens dialog box for adding a new location.

Enters installation structure tree screen.

Renames the current location.

HELP

Enters installation structure tree screen.

ESC

Back to the last operation mode of the instrument.

Note:



The tree structure is limited to 2000 locations with 10 levels in depth, see figure 6.3.

Figure 6.3: Sub-levels depth definition

Figure 6.4

shows how individual structure elements are displayed on the instrument. The

outlook is the same for all three memory menus.

Figure 6.4: Data structure elements

MI 3101 EurotestAT: Data handling Storing test results

6.3 Storing test results

After the completion of a single test or auto sequence the results and parameters are ready for storing ( icon is displayed in the information field). Press the MEM key to store

the results.

See chapter 6.2 for definitions of displayed

fields.

Figure 6.5: Save test menu

Keys in save test menu - installation data structure field:

 /  /  / 

Short press - select the location in structure of installation data field. Pressed for a few seconds in some cases - add a new location in the

structure, see 6.6.1.

MEM

Saves test results to the last position in selected location and returns to the measuring menu.

TAB

Toggles between results and structure data fields, see 6.3.1.

ESC

Exits save test menu.

Edits name of selected location (see 4.3.4).

Enters installation structure tree view to select appropriate location.

Notes:

 Press the MEM key twice to quickly store the results to pre-selected location.  By default it is offered to append the result to the existing results in the selected

location.

6.3.1 Saving results specialties

It is possible to overwrite existing result when storing new result.

Appending new result

Overwriting requires confirmation

Figure 6.6: Saving in result field

MI 3101 EurotestAT: Data handling Recalling test results and parameters

Keys in save test menu - results field:

 /  Select stored test result.

TEST

Saves test result into selected line (confirmation is needed to overwrite an existing result).

ESC

Back to store test menu - installation data structure field.

Keys with open dialog:

 /  Select YES / NO. TEST

Confirms selected option.

ESC

Cancels without changes.

For information about storing into a new non-existent location see 6.6.1.

6.4 Recalling test results and parameters

Press the MEM key in single or auto sequence menu when there is no result available for storing or select in MISC menu.

See

6.2 for definitions of displayed fields.

Figure 6.7: Main recall menu

Keys in main recall memory menu:

 /  /  / 

Short press - select the location in structure of installation data field. Pressed for a few seconds in some cases - add a new location in the

structure, see 6.6.1.

TAB

Toggles between results and structure data field.

ESC

Exits to the last state of the instrument.

Edits name of selected location (for editing see 4.3.4).

Enters installation structure tree view to select appropriate location.

6.4.1 Recalling result

Result field has to be selected.

Figure 6.8: Recall data menu

MI 3101 EurotestAT: Data handling Recalling test results and parameters

Keys in results field:  /  Select the stored data.

TEST

Opens selected stored item.

TAB, ESC

Back to recall memory main menu.

Key:

ESC

Back to recall memory main menu.

Figure 6.9: Stored single test

example

Keys:

 /  Select stored data. TEST

Opens function result.

ESC

Back to recall memory main menu.

Key in open function result:

ESC

Back to observed auto sequence.

Figure 6.10: Auto sequence stored

example

MI 3101 EurotestAT: Data handling Clearing saved data

6.5 Clearing saved data

From main menu select miscellaneous menu and enter option (see 4.4.3).

In select

option for erasing complete test

results memory.

Figure 6.11: Clear memory

Keys:  /  Select CANCEL / CLEAR.

TEST

Confirms selected option.

ESC

Cancels dialog without changes.

In select

option to delete particular result

or modify installation data structure.

Figure 6.12: Clear test menu

Keys:  /  Select location.

TEST

Opens dialog for clearing in installation data structure.

TAB

Moves focus into result field for selection of surplus result, see 6.5.1.

Enters installation structure tree view to select appropriate location.

Renames current location.

ESC

Back to the last mode of the instrument.

MI 3101 EurotestAT: Data handling Clearing saved data

6.5.1 Clearing specialties

In the result field the particular stored test result can be cleared.

Selection of data for clearing

Dialog before clear

Figure 6.13: Clearing particular test

Keys:

 /  Select stored test.

TEST

Opens dialog for clearing selected test.

ESC

Back to last mode of the instrument.

Keys in opened dialog:

 /  Select YES / NO. TEST

Confirms selected option.

ESC

Cancels without changes.

Legend for clearing in installation data structure:

Results in current location. Results in sub-locations. Remove current location and its sub-locations.

Figure 6.14: Clear in installation

data structure menu

Keys:  /  /  /  Select option.

TEST

Confirms option.

ESC

Cancels dialog without changes.

MI 3101 EurotestAT: Data handling Editing installation data structure

6.6 Editing installation data structure

Installation data structure when once stored in the instrument can also be modified during use of the instrument. Editing possibilities are:

 Adding new location – see 6.6.1,

 Modifying the name of selected location,

 Clearing location / tree structure, see 6.5.1.

The possibilities are accessible in save, recall and clear (partly) menus.

6.6.1 Adding new locations

Note:

 The structure can be expanded to 10 horizontal levels deep and with maximum

2000 storing locations.

Keys:

 /  /  / 

Select the existing location.

Pressed for a few seconds in some cases - add a new location in the

structure, see 6.6.1.

Enters installation structure tree view to select appropriate location.

Renames the current location.

ESC

Back to the last operation mode of the instrument.

 (for 2 seconds)

Opens dialog box for adding new location at the same level. Active only if selected location is the last in the level.

Name of the new location: Same name as previous +1.

 (for 2 seconds)

Opens dialog box for adding new location at the next sublevel. Active only if there are no sublevels at the selected location.

Name of the new location: Location

Keys in open dialog box:  /  Select YES / NO.

TEST

Confirms selected option.

ESC

Cancels dialog box without changes.

An example for opening a new location and storing a test result into the location is presented below.

Finished test with the results prepared for saving is marked with

icon.

Figure 6.15: Test result prepared for saving

MI 3101 EurotestAT: Data handling Editing installation data structure

Key:

MEM

Enters the save test menu.

Figure 6.16: Save test menu

Keys:

Changes structure view.

TEST

Confirms the new location.

Enters name of the location.

Figure 6.17: Dialog box for new location

Enter name of the location.

Key:

Confirms the name.

Figure 6.18: Entering name for the new

location

Key:

MEM

Saves results into the location.

Figure 6.19: Location prepared

Figure 6.20: Stored example

MI 3101 EurotestAT: Data handling Communication

6.7 Communication

Stored results can be transferred to a PC. A special communication program on the PC automatically identifies the instrument and enables data transfer between the instrument and the PC. There are two communication interfaces available on the instrument: USB or RS 232 (for

selection see 4.4.6).

PS/2 - RS 232 cable

minimum connections: 1 to 2, 4 to 3, 3 to 5

PS/

for MI 3101

9 pin D female for PC

Figure 6.21: Interface connection for data transfer over PC COM port

How to transfer stored data:

 In the MISC: select appropriate communication interface (USB / RS 232).

RS 232 selected: connect a PC COM port to the instrument PS/2 connector using the PS/2

- RS232 serial communication cable;

USB selected: connect a PC USB port to the instrument USB connector using the USB

interface cable.

 Power on the PC and the instrument.

 Run the program Eurolink.

 The PC and the instrument automatically recognize each other.  The program on the PC enables the following possibilities:

Downloading data; Clearing storage; Changing and downloading user data; Preparing a simple report form; Preparing a file for exporting to a spreadsheet.

The program Eurolink is a PC software running on Windows NT, Windows 2000, Windows

XP, Windows Vista, Windows 7. Read the file README_EuroLink.txt on CD for instructions about installing and running the program.

Note:

 USB drivers should be installed on PC before using the USB interface. Refer to

USB installation instructions available on installation CD.

MI 3101 EurotestAT: Data handling Operation with barcode scanner

6.8 Operation with barcode scanner

Instruments (hardware version HW 5 or higher) support operation with barcode scanner. The main application is to identify barcode labeled installation structure elements.

How to read data with barcode scanner:

 Connect barcode scanner to PS/2 communication port  In ‘Edit location menu’ (see chapter 6.6, figure 6.18) the location name can be

alternatively read from barcode.

Note:

 Proper operation is assured only with barcode scanners supplied by METREL.  For support of different barcode format refer to Barcode reader’s manual.  Maximal length of barcode is 10 characters.

MI 3101 EurotestAT: Maintenance Replacing fuses/Cleaning/Calibration/Service

7 Maintenance

Unauthorized person is not allowed to open the EurotestAT instrument. There are no user replaceable components inside the instrument, except three fuses and batteries under rear cover.

7.1 Replacing fuses

There are three fuses under back cover of the EurotestAT instrument.

 F1

M 0.315 A / 250 V, 205 mm This fuse protects internal circuitry of continuity function if test probes are connected to the mains supply voltage by mistake during measurement.

 F2, F3

F 4 A / 500 V, 326.3 mm General input protection fuses of test terminals L/L1 and N/L2.

Warnings:

 Disconnect any measuring accessory and power off the instrument before

opening battery/fuse compartment cover, hazardous voltage inside!

 Replace blown fuse with original type only, otherwise the instrument may be

damaged and/or operator’s safety impaired!

Position of fuses can be seen in Figure 3.4 in chapter 3.3 Back panel.

7.2 Cleaning

No special maintenance is required for the housing. To clean the surface of the instrument use a soft cloth slightly moistened with soapy water or alcohol. Then leave the instrument to dry totally before use.

Warnings:

 Do not use liquids based on petrol or hydrocarbons!  Do not spill cleaning liquid over the instrument!

7.3 Periodic calibration

It is essential that the test instrument is regularly calibrated in order technical specification listed in this manual is guaranteed. We recommend an annual calibration. Only an authorized technical person can do the calibration. Please contact your dealer for further information.

7.4 Service

For repairs under warranty, or at any other time, please contact your distributor.

MI 3101 EurotestAT: Technical specifications

8 Technical specifications

8.1 Insulation resistance

Insulation LN, LPE, NPE

Insulation resistance (nominal voltages 50 VDC, 100 V

and 250 VDC)

Measuring range according to EN61557 is 0.25 M  199.9 M.

Measuring range (M) Resolution (M)

Accuracy

0.00  19.99

0.01

(5 % of reading + 5 digits)

20.0  99.9 (10 % of reading)

100.0  199.9

0.1

(20 % of reading)

Insulation resistance (nominal voltages 500 VDC and 1000 VDC) Measuring range according to EN61557 is 0.15 M  1000 M.

Measuring range (M) Resolution (M)

Accuracy

0.00  19.99

0.01

(5 % of reading + 3 digits)

20.0  199.9

0.1

200  299

(10 % of reading)

300  1000

(20 % of reading)

Insulation ALL and ‘L-PE,N-PE’, ‘L-N,L-PE’ Insulation resistance (nominal voltages 50 VDC, 100 VDC , 250 VDC ,500 V

DC,

1000 VDC)

Measuring range according to EN61557 is 0.34 M  30.0 M.

Measuring range (M) Resolution (M)

Accuracy

0.00  19.99

0.01

20.0  30.0

0.1

(10 % of reading + 5

digits)

Voltage

Measuring range (V) Resolution (V) Accuracy

0  1200

(3 % of reading + 3 digits)

Nominal voltages .............................. 50 V

, 100 VDC, 250 VDC, 500 VDC, 1000 VDC

Open circuit voltage .......................... -0 % / + 20 % of nominal voltage

Measuring current............................. min. 1 mA at RN=UN1 k/V

Short circuit current........................... max. 0.6 mA

Specified accuracy is valid if universal test cable is used while it is valid up to 100 M if tip commander is used. Specified accuracy is valid up to 100 M if relative humidity > 85%. In case the instrument gets moistened the results could be impaired. In such case it is recommended to dry the instrument and accessories for at least 24 hours. The error in operating conditions could be at most the error for reference conditions (specified above for each function) 5 % of measured value.

The number of possible tests............ > 1200, with a fully charged battery

Auto discharge after test.

MI 3101 EurotestAT: Technical specifications

8.2 Continuity

8.2.1 Resistance R200mA (LPE, NPE)

Measuring range according to EN61557 is 0.16   1999 .

Measuring range R () Resolution ()

Accuracy

0.00  19.99

0.01

(3 % of reading + 3 digits)

20.0  199.9

0.1

200  1999

(5 % of reading)

2000  9999

1 Indicator only

Measuring range R+, R- () Resolution ()

Accuracy

0.00  19.9

0.1

(5 % of reading + 5 digits)

20.0  199.9

0.1

200  1999

(10 % of reading)

2000  9999

1 Indicator only

Open-circuit voltage.......................... 6.5 VDC  9 VDC

Measuring current............................. min. 200 mA into load resistance of 2 

Test lead compensation.................... up to 20 

The number of possible tests ........... > 2000, with a fully charged battery

Automatic polarity reversal of the test voltage.

8.2.2 Resistance R7mA (LPE, NPE)

Measuring range () Resolution ()

Accuracy

0.0  19.9

0.1

20  1999

(5 % of reading + 3 digits)

2000  9999

1 Indicator only

Open-circuit voltage.......................... 6.5 VDC

 9 VDC

Short-circuit current .......................... max. 8.5 mA

Test lead compensation.................... up to 20 

8.3 RCD testing

8.3.1 General data

Nominal residual current (A,AC) ....... 10 mA, 30 mA, 100 mA, 300 mA, 500 mA,

1000 mA

Nominal residual current accuracy.... -0 / +0.1I; I = IN, 2IN, 5IN

-0.1I / +0; I = 0.5IN

AS / NZ selected: ± 5 %

Test current shape............................ Sine-wave (AC), pulsed (A),DC (B)

DC offset for pulsed test current ....... 6 mA (typical)

RCD type .......................................... G (non-delayed), S (time-delayed)

Test current starting polarity ............. 0 º or 180 º

Voltage range ................................... 40 V  264 V (14 Hz  500 Hz)

MI 3101 EurotestAT: Technical specifications

RCD test current selection (r.m.s. value calculated to 20ms) according to IEC 61009:

IN × 1/2 IN × 1 IN × 2 IN × 5 RCD I

IN (mA)

AC A B AC A B AC A B AC A B AC A B

10 5 3.5 5 10 20 20 20 40 40 50 100 100

  

30 15 10.5 15 30 42 60 60 84 120 150 212 300

  

100 50 35 50 100 141 200 200 282 400 500 707 1000

  

300 150 105 150 300 424 600 600 848 n.a. 1500 n.a. n.a.

  

500 250 175 250 500 707 1000 1000 1410 n.a. 2500 n.a. n.a.

  

1000 500 350 500 1000 1410 n.a. 2000 n.a. n.a. n.a. n.a. n.a.

 

n.a.

n.a..................................................... not applicable

8.3.2 Contact voltage RCD-Uc

Measuring range according to EN61557 is 20.0 V  31.0V for limit contact voltage 25V Measuring range according to EN61557 is 20.0 V  62.0V for limit contact voltage 50V

Measuring range (V) Resolution (V) Accuracy

0.0  19.9

0.1

(-0 % / +15 %) of reading ± 10 digits

20.0  99.9

(-0 % / +15 %) of reading

The accuracy is valid if mains voltage is stabile during the measurement and PE terminal is free of interfering voltages.

Test current....................................... max. 0.5IN

Limit contact voltage ......................... 25 V, 50 V

Specified accuracy is valid for complete operating range.

8.3.3 Trip-out time

Complete measurement range corresponds to EN 61557 requirements. Maximum measuring times set according to selected reference for RCD testing.

Measuring range (ms) Resolution (ms) Accuracy

0.0  40.0

0.1

1 ms

0.0  max. time *

0.1

3 ms

* For max. time see normative references in 4.4.2 – this specification applies to max. time

>40 ms.

Test current....................................... ½

I

N

, IN, 2IN, 5I

N

5IN is not available for IN=1000 mA (RCD types AC) or I

N

 300 mA (RCD type A,B).

I

N

is not available for IN=1000 mA (RCD type A,B).

I

N

is not available IN=1000 mA (RCD Typ B).

MI 3101 EurotestAT: Technical specifications

8.3.4 Trip-out current

Trip-out current Complete measurement range corresponds to EN 61557 requirements.

Measuring range I Resolution I

Accuracy

0.2IN  1.1IN (AC type) 0.05IN 0.1IN

0.2IN  1.5IN (A type, IN ≥30 mA) 0.05IN 0.1IN

0.2IN  2.2IN (A type, IN <30 mA) 0.05IN 0.1IN

0.2IN  2.2IN (B type) 0.05IN 0.1IN

Trip-out time

Measuring range (ms) Resolution (ms) Accuracy

0  300

3 ms

Contact voltage

Measuring range (V) Resolution (V) Accuracy

0.0  19.9

0.1

(-0 % / +15 %) of reading  10 digits

20.0  99.9

0.1 (-0 % / +15 %) of reading

The accuracy is valid if mains voltage is stabile during the measurement and PE terminal is free of interfering voltages. Measurement can not be performed for IN=1000 mA (RCD type B). Specified accuracy is valid for complete operating range.

8.4 Fault loop impedance and prospective fault current

8.4.1 No disconnecting device or FUSE selected

Fault loop impedance Measuring range according to EN61557 is 0.25   19999 .

Measuring range (

) Resolution ()

Accuracy

0.00  9.99

0.01

10.0  99.9

0.1

100  19999

(5 % of reading + 5 digits)

Prospective fault current (calculated value)

Measuring range (A) Resolution (A) Accuracy

0.00  9.99

0.01

10.0  99.9

0.1

100  999

1.00k  9.99k

10.0k  23.0k

100

Consider accuracy of fault

loop impedance

measurement

The accuracy is valid if mains voltage is stable during the measurement.

Test current (at 230 V)...................... 6.5 A (10 ms)

Nominal voltage range ...................... 30 V  500 V (14 Hz  500 Hz)

MI 3101 EurotestAT: Technical specifications

8.4.2 RCD selected

Fault loop impedance Measuring range according to EN61557 is 0.46   19999 .

Measuring range () Resolution ()

Accuracy *

0.00  9.99

0.01

(5 % of reading + 10 digits)

10.0  99.9

0.1

10 % of reading

100  19999

10 % of reading

* Accuracy may be impaired in case of heavy noise on mains voltage

Prospective fault current (calculated value)

Measuring range (A) Resolution (A) Accuracy

0.00  9.99

0.01

10.0  99.9

0.1

100  999

1.00k  9.99k

10.0k  23.0k

100

Consider accuracy of fault

loop impedance

measurement

Nominal voltage range ...................... 30 V  500 V (14 Hz  500 Hz)

No trip out of RCD. R, XL values are indicative.

8.5 Line impedance / prospective short-circuit current and

Voltage drop

Line impedance Measuring range according to EN61557 is 0.25   19.9 k.

Measuring range () Resolution ()

Accuracy

0.00  9.99

0.01

10.0  99.9

0.1

100  999

1.00k  9.99k

10.0k  19.9k

100

(5 % of reading + 5 digits)

Prospective short-circuit current (calculated value)

Measuring range (A) Resolution (A) Accuracy

0.00  0.99

0.01

1.0  99.9

0.1

100  999

1.00k  99.99k

100k  199k

1000

Consider accuracy of line

impedance measurement

Test current (at 230 V)...................... 6.5 A (10 ms)

Nominal voltage range ...................... 30 V  500 V (14 Hz  500 Hz)

R, XL values are indicative.

MI 3101 EurotestAT: Technical specifications

Voltage drop (calculated value)

Measuring range (%) Resolution (%) Accuracy

0.0  99.9

0.1

Consider accuracy of line

impedance measurement

REF

measuring range……………………… 0.00 Ω  20.0 Ω

8.6 Voltage, frequency, and phase rotation

8.6.1 Phase rotation

Nominal system voltage range.......... 100 VAC  550 VAC

Nominal frequency range.................. 14 Hz

 500 Hz

Result displayed ............................... 1.2.3 or 3.2.1

8.6.2 Voltage

Measuring range (V) Resolution (V) Accuracy

0  550

(2 % of reading + 2 digits)

Result type........................................ True r.m.s. (trms)

Nominal frequency range.................. 0 Hz, 14 Hz  500 Hz

8.6.3 Frequency

Measuring range (Hz) Resolution (Hz) Accuracy

0.00  999.99

0.01

(0.2 % of reading + 1 digit)

Nominal voltage range ...................... 10 V  550 V

8.7 Online terminal voltage monitor

Measuring range (V) Resolution (V) Accuracy

10  550

(2 % of reading + 2 digits)

8.8 Earth resistance

Earth resistance three-wire method

Measuring range according to EN61557 is 0.67   9999 

Measuring range () Resolution ()

Accuracy

0.00  19.99

0.01

20.0  199.9

0.1

(3 % of reading + 3 digits)

200  1999

 5 % of reading

2000  9999

 10 % of reading

Additional spike resistance error if

Rc max. or Rp max. is exceeded ......

(5 % of reading + 10 digits)

Rc max. ............................................ 100 RE or 50 k (whichever is lower)

MI 3101 EurotestAT: Technical specifications

Rp max. ............................................ 100 RE or 50 k (whichever is lower)

Automatic test of probe resistance.......... yes

Additional error

at 3 V voltage noise (50 Hz).............. (5 % of reading +10 digits)

Automatic test of voltage noise ......... yes

Noise voltage indication threshold .... 1 V (<50 , worst case)

Open-terminal test voltage................ 40 VAC

Test voltage frequency...................... 125 Hz / 150 Hz

Short-circuit test current.................... < 20 mA

Specific earth resistance

Measuring range (m) Resolution (m)

Accuracy

0.0  99.9

0.1

100  999

1.00k  9.99k

0.01k

10.0k  99.9k

0.1k

>100k 1k

See accuracy note

Measuring range (ft) Resolution (ft)

Accuracy

0.0  99.9

0.1

100  999

1.00k  9.99k

0.01k

10.0k  99.9k

0.1k

>100k 1k

See accuracy note

Principle:

 = 2··distance·Re,

with Re as measured resistance in 4-wire method.

Accuracy note:

 Accuracy of the specific earth resistance result depends on measured resistance

Re and is as follows:

Measuring range ()

Accuracy

1.00  1999 5 % of measured 2000 19.99k 10 % of measured >20k

20 % of measured

Additional error

See Earth resistance three-wire method.

8.9 2  line/loop impedance

8.9.1 High precision line impedance

Measuring range according to EN61557 is 5.0  1999 m

Measuring range (m) Resolution (m)

Accuracy

0.1  199.9

0.1

200  1999

(5 % + 1 m)

MI 3101 EurotestAT: Technical specifications

Nominal voltage range ............................100 V  440 V

Nominal frequency ..................................50 Hz

Maximum test current (at 400V)..............267 A (10 ms)

Calculation of prospective short-circuit current (standard voltage value):

V230

L-N

= 230 V  10 %

V400

L-L

= 400 V  10 %

Calculation of prospective short-circuit current (non-standard voltage value):

L-L

L)-L(NMAX

ph3KMAX

U×C

HOT L)-(L

L)-L(NMIN

ph3KMIN

U×C

L-L

L)-L(NMAX

ph2KMAX

U×C

HOT L)-(L

L)-L(NMIN

ph2KMIN

U×C

N-L

N)-L(NMAX

N)-(LKMAX

U×C

HOT N)-(L

N)-L(NMIN

N)-(LKMIN

U×C

L-L

L-LL-L

X+R=Z

()

L-L

L-LHOT L)-(L

X+R×5.1=Z

N-L

N-LN-L

X+R=Z

()

N-L

N-LHOT N)-(L

X+R×5.1=Z

N(L-N)

= 230 V  10 %

N(L-L)

= 400 V  10 %

230 V < U

< 400 V

MAX

1.05 1.10

MIN

0.95 1.00

8.9.2 High precision fault loop impedance

Measuring range according to EN61557 is 5.0  1999 m

Measuring range (m) Resolution (m)

Accuracy

0.0  199.9

0.1

200  1999

(5 % + 1 m)

Nominal voltage range ............................100 V  440 V

Nominal frequency ..................................50 Hz

Maximum test current (at 230 V).............154 A (10 ms)

Calculation of prospective short-circuit current (standard voltage value):

V230

L-PE

= 230 V  10 %

Calculation of prospective short-circuit current (non-standard voltage value):

PE-L

PE)-L(NMAX

PE)-(LKMAX

U×C

HOT PE)-(L

PE)-L(NMIN

PE)-(LKMIN

U×C

PE-L

PE-LPE-L

X+R=Z

()

PE-L

PE-LHOT PE)-(L

X+R×5.1=Z

MI 3101 EurotestAT: Technical specifications

N(L-PE)

= 230 V  10 %

230 V < U

< 400 V

MAX

1.05 1.10

MIN

0.95 1.00

8.9.3 Contact voltage

Measuring range (V) Resolution (V) Accuracy

0  100

(10 % + 3 digits)

8.10 Varistor test

DC voltage

Measuring range (V) Resolution (V) Accuracy

0  1000

(3 % of reading + 3 digits)

AC voltage

Measuring range (V) Resolution (V) Accuracy

0  625

Consider accuracy of DC voltage

Measurement principle...................... d.c. voltage ramp

Test voltage slope............................. 500 V/s

Threshold current.............................. 1 mA

MI 3101 EurotestAT: Technical specifications

8.11 General data

Power supply voltage........................ 9 V

(61.5 V battery or accu, size AA)

Operation .......................................... typical 13 h

Charger socket input voltage ............ 12 V

 10 %

Charger socket input current............. 400 mA max.

Battery charging current.................... 250 mA (internally regulated)

Overvoltage category........................ 600 V CAT III, 300 V CAT IV

Plug commander

overvoltage category ................ 300 V CAT III

Protection classification .................... double insulation

Pollution degree................................ 2

Protection degree ............................. IP 40

Display ............................................ 320x240 dots matrix display with backlight

Dimensions (w

 h  d) ..................... 23 cm  10.3 cm  11.5 cm

Weight ............................................ 1.32 kg, without battery cells

Reference conditions

Reference temperature range........... 10

C  30 C

Reference humidity range................. 40 %RH

 70 %RH

Operation conditions

Working temperature range .............. 0

C  40 C

Maximum relative humidity ............... 95 %RH (0

C  40 C), non-condensing

Storage conditions

Temperature range ........................... -10

C  +70 C

Maximum relative humidity ............... 90 %RH (-10

C  +40 C)

80 %RH (40

C  60 C)

Locator.............................................. supports inductive mode

Maximum operation voltage.............. 440 V a.c.

Communication transfer speed

RS 232.............................................. 115200 baud

USB .................................................. 256000 baud

The error in operating conditions could be at most the error for reference conditions (specified in the manual for each function) +1 % of measured value + 1 digit, unless otherwise specified in the manual for particular function.

MI 3101 EurotestAT: Appendix A Fuse table

100

A Appendix A - Fuse table

Fuse type NV

Disconnection time [s]

35m 0.1 0.2 0.4 5

Rated

current

(A)

Min. prospective short- circuit current (A)

2 32.5 22.3 18.7 15.9 9.1 4 65.6 46.4 38.8 31.9 18.7

6 102.8 70 56.5 46.4 26.7 10 165.8 115.3 96.5 80.7 46.4 16 206.9 150.8 126.1 107.4 66.3 20 276.8 204.2 170.8 145.5 86.7 25 361.3 257.5 215.4 180.2 109.3 35 618.1 453.2 374 308.7 169.5 50 919.2 640 545 464.2 266.9 63 1217.2 821.7 663.3 545 319.1 80 1567.2 1133.1 964.9 836.5 447.9

100 2075.3 1429 1195.4 1018 585.4 125 2826.3 2006 1708.3 1454.8 765.1 160 3538.2 2485.1 2042.1 1678.1 947.9 200 4555.5 3488.5 2970.8 2529.9 1354.5 250 6032.4 4399.6 3615.3 2918.2 1590.6 315 7766.8 6066.6 4985.1 4096.4 2272.9 400 10577.7 7929.1 6632.9 5450.5 2766.1 500 13619 10933.5 8825.4 7515.7 3952.7 630 19619.3 14037.4 11534.9 9310.9 4985.1 710 19712.3 17766.9 14341.3 11996.9 6423.2

800 25260.3 20059.8 16192.1 13545.1 7252.1 1000 34402.1 23555.5 19356.3 16192.1 9146.2 1250 45555.1 36152.6 29182.1 24411.6 13070.1

Fuse type gG

Disconnection time [s]

35m 0.1 0.2 0.4 5

Rated

current

(A)

Min. prospective short- circuit current (A)

2 32.5 22.3 18.7 15.9 9.1 4 65.6 46.4 38.8 31.9 18.7

6 102.8 70 56.5 46.4 26.7 10 165.8 115.3 96.5 80.7 46.4 13 193.1 144.8 117.9 100 56.2 16 206.9 150.8 126.1 107.4 66.3 20 276.8 204.2 170.8 145.5 86.7 25 361.3 257.5 215.4 180.2 109.3 32 539.1 361.5 307.9 271.7 159.1 35 618.1 453.2 374 308.7 169.5 40 694.2 464.2 381.4 319.1 190.1 50 919.2 640 545 464.2 266.9 63 1217.2 821.7 663.3 545 319.1 80 1567.2 1133.1 964.9 836.5 447.9

100 2075.3 1429 1195.4 1018 585.4

METREL MI 3101 EurotestAT, MI 3101, EurotestAT Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual