METREL MI 3321 MultiservicerXA User manual

MultiservicerXA
MI 3321
Instruction Manual
Ver. 5.3.6, Code no. 20 751 513

2
Distributor:
Manufacturer:
Metrel d.d.
Ljubljanska cesta 77
SI-1354 Horjul
E-mail: [email protected]
http://www.metrel.si
© 2010 –2019 Metrel
Version note: ver. 5.3.5 relates to HW 5 version with floating HV and additional voltage
detection on PE of installation part.
Mark on your equipment certifies that it meets requirements of all subjected EU 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 3321 MultiservicerXA Table of contents
3
1General description ............................................................................................8
1.1 Warnings...........................................................................................................9
1.2 Warning markings on connector panel............................................................10
1.3 Standards applied ...........................................................................................10
2Instrument description .....................................................................................12
2.1 Front panel......................................................................................................12
2.2 Safety pre-tests...............................................................................................13
2.3 Symbols and messages ..................................................................................14
2.4 Dual supply voltage operation.........................................................................17
3Technical specifications...................................................................................18
3.1 Withstanding 1890 V, 2200 V..........................................................................18
3.2 Withstanding 1000 V .......................................................................................18
3.3 Discharging time..............................................................................................19
3.4 Continuity ........................................................................................................19
3.5 Insulation resistance, Insulation –S resistance...............................................20
3.6 Subleakage current, Subleakage –S current..................................................20
3.7 Differential Leakage current ............................................................................21
3.8 Power / Functional test....................................................................................21
3.9 Touch leakage current.....................................................................................21
3.10 Polarity test......................................................................................................21
3.11 Clamp current..................................................................................................22
3.12 PRCD testing...................................................................................................22
3.13 RCD testing.....................................................................................................22
3.13.1 General data ............................................................................................22
3.13.2 Contact voltage RCD-Uc..........................................................................23
3.13.3 Trip-out time.............................................................................................23
3.13.4 Trip-out current.........................................................................................24
3.14 Fault loop impedance......................................................................................24
3.14.1 Zs.............................................................................................................24
3.14.2 Zs(rcd), Rs(rcd)........................................................................................25
3.14.3 High precision fault loop impedance Z m  L-Pe.......................................25
3.14.4 Contact voltage ........................................................................................26
3.15 Line impedance...............................................................................................26
3.15.1 High precision line impedance .................................................................27
3.16 Voltage, frequency, and phase rotation...........................................................28
3.16.1 Phase rotation..........................................................................................28
3.16.2 Voltage, Frequency..................................................................................28
3.17 General data....................................................................................................28
4Main menu and test modes..............................................................................30
4.1 Help menus.....................................................................................................30
4.2 Instrument main menu.....................................................................................30
4.3 General settings menu ....................................................................................31
4.3.1 Setting date and time ...............................................................................32
4.3.2 Language selection..................................................................................32
4.3.3 Print header..............................................................................................33
4.3.4 Viewing of instrument data.......................................................................33
4.3.5 Display contrast adjustment .....................................................................34

MI 3321 MultiservicerXA Table of contents
4
4.3.6 Reset instrument settings.........................................................................34
4.3.7 Communication settings...........................................................................35
4.3.8 Edit User / device data menu...................................................................36
4.3.8.1 Users submenu .............................................................................................36
4.3.8.2 Devices submenu..........................................................................................37
4.3.8.3 Test sites submenu........................................................................................37
4.3.8.4 Locations submenu........................................................................................38
4.3.9 Password .................................................................................................39
4.3.10 Result ..........................................................................................................40
5PAT testing operating mode ............................................................................42
5.1 PAT testing main menu...................................................................................42
5.2 VDE organizer menu.......................................................................................42
5.3 Autotest custom menu.....................................................................................43
5.4 Project autotests menu....................................................................................43
5.5 Barcode / TAG menu.......................................................................................43
5.6 Single test menu..............................................................................................44
5.7 Recall/ delete/ send results menu ...................................................................44
5.8 Data upload / download menu.........................................................................45
5.9 Setup menu.....................................................................................................45
5.9.1 Instrument settings...................................................................................45
6Single tests in PAT testing mode ....................................................................47
6.1 Performing measurements in single test mode ...............................................47
6.2 Measurements –Single tests for appliances...................................................48
6.2.1 Earth bond resistance ..............................................................................48
6.2.1.1 Compensation of test leads resistance ..........................................................49
6.2.2 Insulation resistance.................................................................................49
6.2.3 Insulation resistance - S...........................................................................51
6.2.4 Substitute leakage current........................................................................53
6.2.5 Substitute leakage - S..............................................................................55
6.2.6 Differential leakage current ......................................................................57
6.2.7 Touch leakage current..............................................................................58
6.2.8 Polarity test ..............................................................................................60
6.2.9 Clamp current test....................................................................................61
6.2.10 PRCD test................................................................................................63
6.2.10.1 PRCD single test .......................................................................................64
6.2.10.2 Automatic PRCD test.................................................................................65
6.2.11 Power / Functional test.............................................................................67
6.3 Measurements –Single tests for welding machines........................................68
6.3.1 Continuity of the protective circuit ............................................................68
6.3.2 Insulation resistance (supply circuit to protective circuit)...............................69
6.3.3 Insulation resistance (welding circuit to protective circuit) .............................70
6.3.4 Insulation resistance (supply circuit to welding circuit).............................71
6.3.5 Insulation resistance (supply circuit of class II equipment to accessible
surfaces).................................................................................................................72
6.3.6 Welding circuit leakage current......................................................................73
6.3.7 Primary leakage current.................................................................................74
6.3.8 Touch leakage current...................................................................................75
6.3.9 No load voltage..............................................................................................75
6.3.10 Clamp current test....................................................................................76

MI 3321 MultiservicerXA Table of contents
5
6.3.11 Functional test..........................................................................................76
7Autotest sequences..........................................................................................77
7.1 VDE organizer –general menu.......................................................................77
7.1.1 VDE organizer operation..........................................................................79
7.1.2 Example of creating a test sequence with VDE organizer........................80
7.2 Custom autotests ............................................................................................81
7.2.1 Deleting an existing custom test sequence ..............................................82
7.2.2 Viewing, modifying and saving an custom autotest..................................82
7.3 Project autotests..............................................................................................84
7.3.1 Selecting a project autotest......................................................................84
7.3.2 Starting a project autotest ........................................................................87
7.3.3 Comparison of results (evaluation of result trends)..................................87
7.4 Barcode / TAG autotests.................................................................................88
7.4.1 Working with RFID tags............................................................................89
7.4.2 Working with barcode reader ...................................................................90
7.5 Performing autotest sequences –for appliances.............................................92
7.5.1 Visual inspection ......................................................................................92
7.5.2 Earth bond resistance measurement........................................................92
7.5.3 Insulation resistance measurement..........................................................93
7.5.4 Insulation resistance S measurement ......................................................93
7.5.5 Substitute leakage current measurement.................................................94
7.5.6 Substitute leakage S measurement..........................................................94
7.5.7 Differential leakage current ......................................................................95
7.5.8 Touch leakage current measurement.......................................................95
7.5.9 Polarity test ..............................................................................................95
7.5.10 TRMS current measurement using clamp current adapter.......................96
7.5.11 PRCD test................................................................................................96
7.5.12 Functional test..........................................................................................96
7.6 Performing autotest sequences –for welding machines.................................97
7.6.1 Visual inspection ......................................................................................97
7.6.2 Continuity of the protective circuit ............................................................98
7.6.3 Insulation resistance (supply circuit to protective circuit)..........................98
7.6.4 Insulation resistance (welding circuit to protective circuit)........................99
7.6.3 Insulation resistance (supply circuit to welding circuit).............................99
7.6.6 Insulation resistance (supply circuit of class II equipment to accessible
surfaces)...............................................................................................................100
7.6.7 Welding circuit leakage current..............................................................100
7.6.8 Primary leakage current.........................................................................100
7.6.9 Touch leakage current............................................................................101
7.6.10 No load voltage......................................................................................101
7.6.11 TRMS current measurement using clamp current adapter.....................102
7.6.12 Functional test........................................................................................102
8Working with autotest results........................................................................103
8.1 Saving autotest results..................................................................................103
8.2 Recalling results............................................................................................104
8.3 Deleting results..............................................................................................106
8.4 Downloading and printing results ..................................................................107
8.5 Data upload / download.................................................................................111

MI 3321 MultiservicerXA Table of contents
6
8.6 Setup menu...................................................................................................111
8.6.1 Instrument settings.................................................................................111
9Machine testing operating mode...................................................................114
9.1 Single tests (machine testing) menu .............................................................114
9.2 Measurements and inspections.....................................................................115
9.2.1 Visual test...............................................................................................115
9.2.2 Continuity...............................................................................................116
9.2.2.1 Single continuity test....................................................................................117
9.2.2.2 Auto-continuity test......................................................................................118
9.2.2.3 Compensation of test leads resistance ........................................................120
9.2.3 Insulation resistance...............................................................................120
9.2.4 High Voltage withstanding test...............................................................122
9.2.5 Loop impedance and prospective fault current.......................................125
9.2.5.1 Z mL-Pe, High precision loop impedance measurement...........................128
9.2.6 RCD tests...............................................................................................130
9.2.6.1 Contact voltage (RCD Uc) ...........................................................................132
9.2.6.2 Trip out time (RCD t)....................................................................................134
9.2.6.3 Trip out current (RCD I) ...............................................................................134
9.2.6.4 RCD Autotest...............................................................................................135
9.2.7 PRCD test..............................................................................................137
9.2.8 Discharging Time ...................................................................................137
9.2.9 Voltage...................................................................................................140
9.2.10 Functional test........................................................................................143
10 Switchgear testing operating mode ..............................................................145
10.1 Single tests (switchgear testing) menu..........................................................145
10.2 Measurements and inspections.....................................................................146
10.2.1 Visual test...............................................................................................146
10.2.2 Continuity...............................................................................................147
10.2.2.1 Single continuity test................................................................................148
10.2.2.2 Auto-continuity test ..................................................................................149
10.2.2.3 Compensation of test leads resistance.....................................................151
10.2.3 Insulation resistance...............................................................................151
10.2.4 High Voltage withstanding test...............................................................153
10.2.5 Discharging Time ...................................................................................156
10.2.6 Voltage...................................................................................................159
10.2.7 RCD test.................................................................................................161
10.2.8 PRCD test..............................................................................................161
10.2.9 Functional test........................................................................................161
10.2.10 Power .................................................................................................162
11 All tests operating mode ................................................................................163
11.1 Single tests (All tests) menu..........................................................................163
11.1.1 Visual test...............................................................................................164
11.1.2 Continuity of protective conductors ........................................................164
11.1.3 Insulation resistance...............................................................................164
11.1.4 Insulation resistance –S.........................................................................164
11.1.5 Substitute leakage current......................................................................164
11.1.6 Substitute leakage current - S................................................................165
11.1.7 Leakage current .....................................................................................165

MI 3321 MultiservicerXA Table of contents
7
11.1.8 Touch leakage current............................................................................165
11.1.9 Polarity test ............................................................................................165
11.1.10 Clamp current test ..............................................................................165
11.1.11 RCD test.............................................................................................165
10.2.12 PRCD test...........................................................................................165
11.1.13 Functional test ....................................................................................165
11.1.14 HV test................................................................................................165
11.1.15 Line impedance and prospective short circuit current test..................165
11.1.15.1 Low line impedance.................................................................................168
11.1.16 Loop impedance test and prospective fault current ............................171
11.1.17 Voltage ...............................................................................................171
11.1.18 Discharging time.................................................................................171
11.1.19 Power .................................................................................................171
12 Working with results in Machine testing, Switchgear testing and All tests
operating mode...............................................................................................172
12.1 Memory organization.....................................................................................172
12.2 Saving single test results...............................................................................172
12.3 Recalling projects..........................................................................................173
12.4 Deleting single test results.............................................................................175
12.5 Deleting project(s) .........................................................................................176
12.6 Downloading and printing results ..................................................................176
13 Maintenance ....................................................................................................179
13.1 Periodic calibration........................................................................................179
13.2 Fuses.............................................................................................................179
13.3 Service ..........................................................................................................179
13.4 Cleaning........................................................................................................179
14 Instrument set and accessories.....................................................................180
AAppendix A –Preprogramed autotests.........................................................181
BAppendix B –Autotest shortcut codes.........................................................190
CAppendix C - Fuse table / IPSC ........................................................................192

MI 3321 MultiservicerXA General description
8
1General description
The multifunctional portable test instrument MultiservicerXA is intended to perform all
measurements for testing the electrical safety of portable electrical equipment,
machines and switchboards. The following tests can be performed:
- Earth bond / Continuity test,
- Insulation resistance,
- Substitute leakage current,
- Differential leakage current,
- Touch leakage current,
- IEC cord polarity test,
- Leakage and TRMS load currents with current clamp,
- Portable RCD test,
- Power test,
- Three phase voltage/ rotary field,
- Line and Loop impedance,
- RCD test,
- Discharging time,
- High voltage (Withstanding) test,
- Functional and Visual inspection,
The measurements are divided into four subgroups:
- Tests for testing portable DUTs acc. to VDE 0701-0702
- Tests for testing electrical safety of machines acc. to EN 60204 Ed.5
- Tests for testing safety of switchboards EN 61439
- All tests. Because of the large set of functions the instruments is suitable also for
safety testing (type testing, maintenance, routine testing) according to other
product standards.
In addition, with adapter A1322 active tests of three phase appliances can be carried
out.
With adapter A1422 active tests of three phase appliances and testing of welding
machines acc. to EN 60974 / VDE 0544 can be carried out.
The instrument has a powerful test data management system. Autotests and single
tests can be stored (depending on the application) in approx. 6000 memory locations.
Some instrument's highlights:
- Large graphic LCD display with resolution of 240 128 dots, with back-light,
- Over 6000 memory locations in data flash memory for storing test results &
parameters,
- Three communication ports (USB and 2 RS232C) for communication with PC,
barcode reader/writer, printers and optional test adapters,
- Soft touch keyboard with cursor keys,
- Built in real time clock,
- Fully compatible with new METREL PATLink PRO PC software package.

MI 3321 MultiservicerXA General description
9
In PAT testing operating mode powerful functions for fast and efficient periodic testing
are included:
- Pre-programmed test sequences,
- Fast testing with barcode identification systems,
- Test data can be uploaded from PC,
- On site comparisons between old and new test results can be performed,
- Enables on site printing of test labels.
1.1 Warnings
In order to reach high level of operator safety while carrying out various measurements
using MultiservicerXA instrument, as well as to keep the test equipment undamaged, it
is necessary to consider the following general warnings:
Read this Instruction manual carefully, otherwise use of the instrument may
be dangerous for the operator, for the instrument or for the equipment under
test!
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 manner not specified in this Instruction manual
the protection provided by the equipment may be impaired!
Do not use the instrument and accessories if any damage is noticed!
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
300 V!
Use only standard or optional test accessories declared for this instrument
supplied by your distributor!
Regularly check the instrument and accessories for correct functioning to
avoid hazard that could occur from misleading results!
The protection class of the TP1 test terminal is CAT III / 300V. It means that
maximum allowed voltage between test terminals and ground is 300 V!
Correctly earthed mains sockets shall only be used to supply the instrument!
In case a fuse has blown follow the instructions in this Instruction manual to
replace it!
Instrument servicing and calibration is allowed to be carried out only by a
competent authorized person!
Hazardous voltages of up to 2200 V nominal are applied to the HV terminals
during the Withstanding test. It is advisable to keep the current trip out limit as
low as possible. Risk of electric shock!
It is advisable not to run tested devices with load currents above 13 A for more
than 15 minutes. Load currents higher than 13 A can result in excessive
temperatures of On/Off switch and fuse holders!
For working with the instrument use only original supplied power supply cord
with 1.5 mm2 wires cross-section (csa)!
All normal safety precautions have to be taken in order to avoid risk of electric
shock when working on electrical installations!

MI 3321 MultiservicerXA General description
10
1.2 Warning markings on connector panel
Refer to chapter 2.1 Front panel.
1.3 Standards applied
The MultiservicerXA instrument is manufactured and tested according to the following
regulations, listed below.
Electromagnetic compatibility (EMC)
EN 61326 -1
Electrical equipment for measurement, control and laboratory use –
EMC requirements
Class B (Portable equipment used in controlled EM environments)
Safety (LVD)
EN 61010 - 1
Safety requirements for electrical equipment for measurement,
control, and laboratory use –Part 1: General requirements
EN 61010-2-030
Safety requirements for electrical equipment for measurement,
control and laboratory use –Part 2-030: Particular requirements for
testing and measuring circuits
EN 61010 - 031
Safety requirements for electrical equipment for measurement,
control and laboratory use - Part 031: Safety requirements for hand-
held probe assemblies for electrical measurement and test
EN 61010-2-032
Safety requirements for electrical equipment for measurement,
control, and laboratory use - Part 2-032: Particular requirements for
hand-held and hand-manipulated current sensors for electrical test
and measurement
Functionality
VDE 0404-1
Testing and measuring equipment for checking the electric safety of
electric devices - Part 1: General requirements
VDE 0404-2
Testing and measuring equipment for checking the electric safety of
electric devices - Part 2: Testing equipment for tests after repair,
change or in the case of repeat tests
VDE 0701-702
Inspection after repair, modification of electrical appliances –
Periodic inspection on electrical appliances
General requirements for electrical safety
EN 60204-1
Safety of machinery - Electrical equipment of machines - Part 1:
General requirements
EN 61439-1
Low-voltage switchgear and controlgear assemblies - Part 1:
General rules
EN 61008-1
Residual current operated circuit-breakers without integral
overcurrent protection for household and similar uses (RCCBs) - Part
1: General rules
EN 62423
Type F and type B residual current operated circuit-breakers with

MI 3321 MultiservicerXA General description
11
and without integral overcurrent protection for household and similar
uses
EN 50191
Erection and operation of electrical test equipment
EN 61557-1
Electrical safety in low voltage distribution systems up to 1 000 V a.c.
and 1 500 V d.c. - Equipment for testing, measuring or monitoring of
protective measures - Part 1: General requirements
EN 61557-2
Electrical safety in low voltage distribution systems up to 1 000 V a.c.
and 1 500 V d.c. - Equipment for testing, measuring or monitoring of
protective measures - Part 2: Insulation resistance
EN 61557-3
Electrical safety in low voltage distribution systems up to 1 000 V a.c.
and 1 500 V d.c. - Equipment for testing, measuring or monitoring of
protective measures - Part 3: Loop impedance
EN 61557-4
Electrical safety in low voltage distribution systems up to 1 000 V a.c.
and 1 500 V d.c. - Equipment for testing, measuring or monitoring of
protective measures - Part 4: Resistance of earth connection and
equipotential bonding
EN 61557-6
Electrical safety in low voltage distribution systems up to 1 000 V a.c.
and 1 500 V d.c. - Equipment for testing, measuring or monitoring of
protective measures - Part 6: Effectiveness of residual current
devices (RCD) in TT, TN and IT systems
EN 61557-7
Electrical safety in low voltage distribution systems up to 1 000 V a.c.
and 1 500 V d.c. - Equipment for testing, measuring or monitoring of
protective measures - Part 7: Phase sequence
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.
Note:
Various devices and appliances can be tested by MultiservicerXA and in further text the
common DUT (abbreviation for Device Under Test) is applied.

MI 3321 MultiservicerXA Instrument description
12
2Instrument description
2.1 Front panel
Front panel
Legend:
1
240 128 dots graphic matrix display with backlight.
2
Mains supply connector.
3
Two T16 A / 250 V fuses for instrument protection.
4
Mains switch with indicator.
5
Barcode and RFID reader / writer connector.
6
PC / printer connector.
Note:
The connector is also intended for connection of compatible external test
adapters, like A 1143, impedance adapter or A 1422 3-phase adapter.
7
USB connector.
8
Current clamps input sockets.
Warnings!
Do not connect any voltage source on this input. It is intended only for
connection of current clamp with current output. Maximum input
current is 30 mA!
Green socket is connected to the functional earth of the system and is

MI 3321 MultiservicerXA Instrument description
13
intended for connection with shield of leakage current clamps only
(e.g. A 1283).
9
Function keys intended for displayed defined options.
10
ESCAPE key.
11
START key.
12
STOP key.
13
Alpha-numeric keyboard.
14
Cursor keys and ENTER key.
15
Test socket (230 V).
Warning!
Line voltage is present on the test socket during the measurement.
Maximum output current is 16 A. Test only devices with maximum rated
supply current not higher than 16 A!
Note:
For devices incorporating high reactive loading, e.g. motor with rated power
>1.5 kW, it is recommended to start measurement first and to turn on the
tested device later.
16
LN and PE sockets for testing the insulation resistance and substitute leakage
current of fixed installed DUTs.
Warning!
These sockets are intended only for the connection to de-energized
devices.
17
TP1 test socket for testing discharge time and electrical installation parameters
like line / loop impedances, voltage, residual current devices, 3-phase
sequence.
18
C2 connector, used as output for continuity tests (in machine, switchboard and
All operating modes).
19
Light indicator of active HV outputs
20
HV test connectors output.
Warning!
A high and dangerous voltage of up to 2200 V a.c. nominal is applied at
this output during the measurement!
21
Test probe (S/C1) connector, used as output for earth bond/ continuity tests and
probe input for class 2 equipment tests (insulation resistance-S, substitute
leakage-S and touch leakage currents ).
22
Cover for preventing simultaneous access of two connectors IEC (23) and S/C1
(21)
23
IEC appliance connector for testing supply cords.
Warning!
The connector input is for test purpose only; do not connect it to the
mains supply!
2.2 Safety pre-tests
Before performing a measurement, the instrument performs a series of pre-tests to
ensure safety and to prevent any damage. These safety pre-tests are checking for:
- Any external voltage against earth on mains test socket,
- Excessively high leakage current,
- Excessively high touch leakage current,

MI 3321 MultiservicerXA Instrument description
14
- Short circuit or too low resistance between L and N of tested device,
- Correct input mains voltage,
- Input PE connection.
If pre-tests fail, an appropriate warning message will be displayed.
The warnings and measures are described in chapter 2.3 Symbols and messages.
2.3 Symbols and messages
Mains voltage is not
correct or PE not
connected.
Check mains voltage
and PE connection!
Warning for improper supply voltage condition. Possible
causes:
- No earth connection or other wiring problem on
supply socket.
- Incorrect mains voltage.
Determine and eliminate the problem before proceeding!
Warning:
- The instrument must be earthed properly!
Warning!
Instrument is
connected to the IT
earthing system or PE
not connected.
Press START key to
continue.
Supply voltage warning. Possible causes:
- No earth connection,
- Instrument connected to an IT earthing system.
Press the START key to continue if instrument is connected
to the IT supply system.
Warning:
- The instrument must be properly earthed!
Resistance L –N too
high (>30 k).
Check fuse and switch.
Are you sure to
proceed? (Y/N)
An excessively high resistance was measured in the fuse
pre-test. Indication means that tested device has too low
consumption or is:
- Not connected,
- Switched off,
- Contains a fuse that has blown.
Select YES or NO with Y or N key.
Resistance L –N low.
Are you sure to
proceed? (Y/N)
A low resistance of the device under test (DUT) supply input
was measured in the pre-test. This means that it is very
likely that an excessively high current will flow after applying
power to the DUT. If the high current is only of short duration
(caused by a short inrush current) the test can be performed,
otherwise not.
Select YES or NO with Y or N key.
Resistance L –N too
low.
Are you sure to
proceed? (Y/N)
An extremely low resistance of the DUT supply input was
measured in the pre-test. It is likely that fuses will blow after
applying power to the DUT. If the too high current is only of
short duration (caused by a short inrush current) the test can
be performed otherwise it must be stopped.
Select YES or NO with Y or N key.

MI 3321 MultiservicerXA Instrument description
15
It is recommended to additionally check the DUT before
proceeding with the test!
Leakage LN-PE high.
Are you sure to
proceed? (Y/N)
Dangerous leakage current (higher than 3.5 mA) will flow if
power would be connected to DUT.
Select YES or NO with Y or N key.
Proceed with testing only if all safety measures have been
taken. It is recommended to perform a thorough earth bond
test on the PE of the DUT before proceeding with the test.
Leakage LN-PE too
high.
Dangerous leakage current (higher than 20 mA) will flow if
power would be connected to the DUT.
Determine and eliminate the problem before proceeding!
Leakage LN-PE or
S/C1-PE too high!
Are you sure to
proceed? (Y/N)
Dangerous leakage current (higher than 20 mA) would flow if
power were connected to the DUT.
Select YES or NO with Y or N key.
Proceed with testing only if all safety measures have been
taken.
It is recommended to perform a thorough earth bond test on
the PE of the DUT before proceeding with the test.
Measurement aborted!
Differential leakage too
high!
An exceptionally high leakage current (higher than about
5 mA) was measured through PE test terminal or PE socket
during the pre-test or test.
Leakage test S/C1-PE
too high!
An exceptionally high leakage current (higher than about
5 mA) was measured through S/C1 test terminal during the
pre-test.
External voltage on
test socket too high!
DANGER!
- Voltage on mains test socket or LN/PE terminals
is higher than approximately 20 V (AC or DC)!
Disconnect the DUT from the instrument immediately and
determine why external voltage was detected!
External voltage on
S/C1 too high!
DANGER!
- Voltage on test probe (S/C1) is higher than
approximately 25 V (AC or DC)!
Disconnect the test probe from the DUT and determine why
external voltage was detected!
Test was skipped for
safety!
Instrument skipped the required test because of a failed
previous test.

MI 3321 MultiservicerXA Instrument description
16
Overheated!
Temperature of internal components of the instrument
reached their top limit. Measurement is prohibited until the
internal temperature has reduced.
Warning!
More than 80 % of
memory is occupied.
Stored data should be
downloaded to PC.
Instrument memory is almost full. Download stored results to
PC.
Warning!
Calibration has been
expired.
Recalibration of the instrument is required. Contact your
dealer.
Warning!
Too high contact
voltage.
A too high contact voltage was detected before an RCD test
being carried out. Check PE connections!
Warning!
Too high voltage on
PE.
Hazardous live voltage on TP1 PE input is present before
running Voltage, Line impedance, Zs, RCD and PRCD tests.
Warning!
Immediately disconnect supply from tested
installation / equipment and check and correct PE
wiring!
Hardware error.
Return the instrument
to the repair centre.
The instrument detects a serious failure.
Connect the test lead to the S/C1 test socket.
Remove the S/C1 connection, especially if it is connected to
any part that will begin to rotate or move when power is
applied.
Connect the test leads to the S/C1 and C2 test sockets.
Warning!
A high voltage is / will be present on the instrument output!
(Withstanding test voltage, Insulation test voltage, or mains
voltage).

MI 3321 MultiservicerXA Instrument description
17
The DUT should be switched on (to ensure that the
complete circuit is tested).
Connect the lead to be tested to the TP1 test terminal.
Connect the cord to be tested to the IEC test terminal.
Connect current clamps for this test.
Test leads resistance in Earth bond and Continuity functions
is compensated.
Test passed.
Test failed.
Some tests in the autotest sequence were skipped, but all
performed tests passed.
2.4 Two rated supply voltages
The MultiservicerXA will operate either at 110 V or 230 V, 50 Hz or 60 Hz mains supply
input.
Notes:
The PAT will conduct a leakage / power tests at the power up mains voltage.
Therefore, to perform a run test on a 110 V DUT (e.g. 110 V drills), the PAT must
be powered from a 110 V mains supply (or center tapped transformer).
The mains voltage does not influence other measurements.

MI 3321 MultiservicerXA Technical specifications
18
3Technical specifications
3.1 Withstanding 1890 V, 2200 V
Withstanding voltage
Range
Resolution
Accuracy
0 V … 3000 V
1 V
(3 % of reading + 5 digit)
Withstanding current*
Range
Resolution
Accuracy
0.0 mA … 99.9 mA
0.1 mA
(10 % of reading + 8 digit)
* Displayed apparent current
Output voltage: .........................1890 V (±3%)*, 2200 V (±3%)*, floating
*at mains voltage = 230 V and max. output current (= 100 mA)
Trip out current [mA]:................2, 5, 10, 20, 50, 100; (accuracy 10 %)
Trip out time: ............................< 30 ms
Timer [s]: ..................................1, 2, 3, 5, 10, 30, 60. START button must be pressed
for operation
Short circuit current at nominal output voltage……………………………...... > 200 mA
Minimum primary voltage..........190 V (95 V) for Isc = 200 mA @ 2200 V winding
Minimum primary voltage..........180 V (90 V) for Isc = 200 mA @ 1890 V winding
Test terminals:
Withstanding voltage
HV sockets
3.2 Withstanding 1000 V
Withstanding voltage
Range
Resolution
Accuracy
0 V … 1500 V
1 V
(3 % of reading + 5 digit)
Withstanding current*
Range
Resolution
Accuracy
0.0 mA …199.9 mA
0.1 mA
(5 % of reading + 5 digit)
* Displayed apparent current
Output voltage / power:.............1000 V -0 %,+20 % / 200 W at Umains 230 V, floating
Trip out current [mA]:................5, 10, 20, 50, 100, 200; (accuracy 10 %)
Trip out time:.............................<30 ms
Timer [s]:...................................1, 2, 3, 5, 10, 30, 60; START button must be pressed
for operation
Short circuit current at nominal output voltage……………………………...... > 200 mA
Minimum primary voltage..........160 V (80 V) for Isc = 200 mA @ 1000 V winding
Test terminals:
Withstanding voltage
HV sockets

MI 3321 MultiservicerXA Technical specifications
19
3.3 Discharging time
Discharging time
Range
Resolution
Accuracy
0.0 s …9.9 s
0.1 s
(5 % of reading + 3 digit)
Peak voltage
Range
Resolution
Accuracy
0 V… 550 V
1 V
(5 % of reading + 5 digit)
2 wires system, triggered on DC voltage falling slope
Max. working voltage:...............550 V peak
Min. working voltage:................85, 170 V peak
Threshold values: .....................1 s, 5 s
Threshold voltage level:............60 V, 120 V
Input resistance: .......................48 M
Test terminals:
Discharging time
TP1 test terminal L↔N
3.4 Continuity
Continuity 10 A (PAT)
Range
Resolution
Accuracy
0.00 …1.99 
0.01 
(5 % of reading + 3 digits)
Indicator only: 2.0 …19.9 
Continuity 10 A (other)
Range
Resolution
Accuracy
0.000 …0.999 
0.001 
(5 % of reading + 6 digits)
1.00 …1.99 
0.01 
(5 % of reading + 3 digits)
Indicator only: 2.0 …19.9 
Continuity 200 mA
Range
Resolution
Accuracy
0.00 …1.99 
0.01 
(5 % of reading + 3 digits)
Indicator only: 2.0 …19.9 
Test currents:............................10 A into 100 mat rated mains supply voltage
200 mA into 2.00 
Open circuit voltage:.................<9 V AC
Test leads resistance compensation:..............................yes,
Pass levels []:.........................0.01 …0.09, 0.10 …0.90, 1.00 …9.00
Test duration [s]:.......................5, 10, 30, 60, 120, 180
Test method:.............................2-wire measurement, floating to earth
Test terminals:
Continuity (PAT)
S ↔ PE (mains test socket) ; (200 mA and 10 A)
S ↔ PE; (200 mA)
Continuity (other)
S/C1 ↔ C2

MI 3321 MultiservicerXA Technical specifications
20
3.5 Insulation resistance, Insulation –S resistance
Insulation resistance
Range
Resolution
Accuracy
0.000 M…0.500 M
0.001 M
(10 % of reading + 5 digits)
0.501 M…1.999 M
0.001 M
(5 % of reading + 3 digits)
2.00 M…19.99 M
0.01 M
20.0 M…199.9 M
0.1 M
Insulation –S resistance
Range
Resolution
Accuracy
0.000 M…0.500 M
0.001 M
(10 % of reading + 5 digits)
0.501 M…1.999 M
0.001 M
(5 % of reading + 3 digits)
2.00 M…19.99 M
0.01 M
Nominal voltages:.....................250 V DC, 500 V DC (- 0 %, + 10 %)
Measuring current:....................min. 1 mA at 250 k(250 V), 500 k(500 V)
Short circuit current:..................max. 2.0 mA
Pass levels [M]:......................0.10, 0.30, 0.50, 1.00, 2.00, 4.0, 7.0, 10.0, none
Test duration [s]:.......................5, 10, 30, 60, 120, none
Test terminals:
Insulation (PAT)
LN (mains test socket)/ LN ↔ PE ( mains test socket) / PE/S
Insulation –S
LN(mains test socket)/ LN ↔ S
Insulation (other)
LN ↔ PE
3.6 Subleakage current, Subleakage –S current
Substitute leakage current
Range
Resolution
Accuracy
0.00 mA …19.99 mA
0.01 mA
(5 % of reading + 5 digits)
Open circuit voltage:.................<50 V AC at rated mains voltage
Short circuit current:..................<40 mA
Pass levels [mA]:......................0.25, 0.50, 0.75, 1.00, 1.50, 2.50, 3.50, 4.00, 4.50, 5.00,
5.50, 6.00, 7.00, 8.00, 9.00, 15.0
Test duration [s]:.......................5, 10, 30, 60, 120, none
Displayed current:.....................calculated to DUT nominal mains supply voltage
(110 V or 230 V).
Frequency response:................complies to EN 61010-1, Figure A1
Test terminals:
Subleakage (PAT)
LN (mains test socket)/ LN ↔ PE ( mains test socket) / PE/S
Subleakage –S
LN(mains test socket)/ LN ↔ S
Subleakage (other)
LN ↔ PE