METREL AutoPAT MI 2143 User manual

AutoPAT
MI 2143
Instruction manual
Ver 1.0, Code no. 20 750 779

2
Distributor:
Producer:
Metrel d.d.
Ljubljanska cesta 77
SI-1354 Horjul
E-mail: [e-mail]
http://www.metrel.si
© 2003 Metrel
Markon your equipment certifies that this equipment meets the requirements of the EU
(European Union) concerning safetyand interference causingequipment regulations
No part ofthis publication maybe reproduced or utilized in anyform or byanymeans
without permission in writing from METREL.

MI 2143 AutoPAT Table of contents
3
1General description....................................................................................................4
1.1 Warnings.................................................................................................................4
1.2 Applied standards...................................................................................................4
2Instrument description...............................................................................................5
2.1 Front panel..............................................................................................................5
2.2 Connector panels....................................................................................................5
2.3 Bottom.....................................................................................................................6
2.4 Indicator panel.........................................................................................................7
2.4.1 Warning indications...........................................................................................7
3Instrument operationand application.......................................................................8
3.1 General...................................................................................................................8
3.2 Measurement limit values.......................................................................................9
3.3 Test setup.............................................................................................................10
3.4 Test procedure......................................................................................................12
4Technical specifications...........................................................................................14
5Maintenance..............................................................................................................16
5.1 Periodic calibration................................................................................................16
5.2 Fuse......................................................................................................................16
5.3 Service..................................................................................................................16
5.4 Cleaning................................................................................................................17
6Instrument set and accessory.................................................................................18

MI 2143 AutoPAT General description
4
1General description
AutoPATMI 2143 is a portable test instrument intended for automatic verification ofthe
electrical safetyofportable electrical equipment. The instrument is designed for testing
the following product groups:
• Class I and Class II equipment;
• General and information technology(IT) equipment;
• Power supplycords.
• This instrument covers the following test functions:
• Earth bond resistance,
• Insulation resistance,
• Substitute leakage current, and
• IEC cord polaritytest.
• The instrument also executesfuse pre-test to assure proper connection of tested
appliance.
• Simple manipulation offers fast selection of desired test. The unique indication of
test resultsenablesfast decision on tested product condition.
• The instrument is designed for testing 230 V appliances but a special test adapter
enables to make tests of110 V appliances.
• AutoPATMI 2143 is Class II product and ensures safe work with tested equipment.
Tested equipment is separated from mains supply.
1.1 Warnings
In order to reach high operator safetywhile carrying out tests using AutoPAT, as well as
to keep the test equipment undamaged, it is necessaryto consider the following
warnings:
If the test equipment isused in a manner not specified in this user manual, the
protection provided bythe equipment maybe impaired!
Read this user manual carefully, otherwise use ofthe instrument maybe dangerous for
the operator, for the instrument or for equipment under test!
Do not use the instrument and accessories ifanydamage is noticed!
In case a fuse hasblownfollowthe instructionsin thisusermanual to replace it!
Service intervention or calibration procedure is allowed to be carried out onlybya
competent authorized person!
Use onlystandard or optional test accessorysupplied byyour distributor!
1.2 Applied standards
The AutoPATMI 2143 instrument has been manufactured and tested in accordance
with the following standards:
SafetyEN 61010-1
Electromagnetic compatibilityIEC 61326
Measurements BS89

MI 2143 AutoPAT Instrument description
5
2Instrument description
2.1 Front panel
CLASS
START
STOP
1
2
3
4
CLASSI
CLASS II
General
IT
IECCord
PASS
FUSE
EARTH25A
POLARITY
FAIL
Front panel
Legend:
1START/STOP key
2APPLIANCE selection key
3SafetyCLASS selection key
4Indicator panel
2.2 Connector panels
1
2
3
Connector side

MI 2143 AutoPAT Instrument description
6
4
Mains supply entry
Legend:
1Test socket
2IEC lead connector
Warning! The connector input is onlyfor test purposes; do not connect it to mains
supply!
3Earth bond connector, also used asan input for class II measurement of
insulation
Note: During IEC cord testing the earth bond clip need not be connected into
earth bond connector.
4Mains supplycord
2.3 Bottom
7
6
5
4
3
2
1
Bottomside
Legend:
1Plastic cover with rubber foot, for inclined position
2Screw.
3Label with measurement data.
4Fuse compartment cover.
5Information label.
6Fixing screwfor fuse compartment cover (see chapter 11.2 Fuses for instructions
on fuse replacement).
7Rubber foot.

MI 2143 AutoPAT Instrument description
7
2.4 Indicator panel
1
2
3
4
CLASSI
CLASSII
General
IT
IECCord
PASS
FUSE
EARTH25A
POLARITY
FAIL
Indicators
Legend:
1Final result of tests
2Particular test function indicator field
3Indication of selected appliance safetyclass
4Tested equipment type
Indicator panel offers all indications which are necessaryas support to automatic test
procedure.
PASS / FAIL indicators showthe final result ofexecuted tests. PASS meansthat results
ofall executed tests are within the predefined limits.
Flashing PASS indicator means that the result ofindicated test function, which is also
flashing, is between two limits of that function.
Test function indicator field containsindications of all tests of the instrument. Ifa test
sequence requires particular test, itsindicator is turned on when the measurement is
performed. After all tests in the test sequence are finished all involved indicators stay
illuminated'. Flashing indicator means that that test is finished with a result outside the
predefined limits.
Fuse indicates onlypower on or power offstate of the tested appliance.
Activityofthe instrument is also indicated with buzzer sound.
2.4.1 Warning indications
Overtemperature protection: indicators EARTH 25A and Earth 100mA begin flashing
when the internal temperature limit of 80 °C is reached. In that case earth bond test is
skipped until temperature is lowenough.
Overvoltage protection: before each test the instrument checks ifexternal voltage is
applied between L and PE, N and PE on test socket, or earth bond clip and PE. The
instrument makes sound indication when the voltage is higher than approximately10 V.

MI 2143 AutoPAT Instrument operation and application
8
3Instrument operation andapplication
3.1 General
Automatic appliance testing with AutoPATMI 2143 is verysimple. It is just necessaryto
select class and type ofappliance and start the test sequence. It is also possible to stop
testing before completion bypressing START / STOP keyagain. In this case all test
indicators are cleared.
Onlythose tests that are required for selected options are executed. Following is a short
description oftests.
FUSE
This is pre-test onlyand is intended to detect iftested appliance is turned on. The
instrument measures the impedance between L and N on test socket. If this impedance
is too high then fuse indicator starts flashing. This pre-test does not have anyinfluence
on final PASS / FAIL decision. The reason is that verylowpower consumption
appliances exist and thus theymayhave impedance higher than the limit.
EARTH 25A
Continuitytest ofPE connection is executed between test socket and earth bond clip.
Earth bond clip has to be connected to accessible conductive partsthat are connected
to PE ofthe appliance supplycord. Test current of 25 A is required for most appliances
in safetyclass I. The instrument contains two limits for this test.
EARTH 100mA
Some information technology(IT) appliances are verysensitive and could be damaged
during standard PE continuitytest as defined above. For this case the test current is
limited to the nominal value of100 mA.
INSULATION
For the CLASS I appliance the insulation resistance is measured between PE and
shorted L and N conductors. The insulation resistance for CLASS II appliance is
measured via earth bond clip instead of PE. Test voltage is 500 V nominal, onlyfor
CLASS I ITis 250 V. This test shows that the resistivityofthe dielectric between
accessible conductive part and L / N is high enough.
For safetyreason do not touch anyaccessible conductive partswith capacitance higher
than 90 nF during insulation testing.
SUB LEAKAGE
Instead ofmeasurement of leakage current with a real mains supply, this measurement
is executed with separated voltage source with output voltage lower than safetylimit.

MI 2143 AutoPAT Instrument description
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The source is connected between PE and shorted L / N conductors. Current into PE is
measured and scaled to supplyvoltage.
POLARITY
This is a special test for detachable supplycords. Polarityin this case meanscorrect
connection between the terminals of a plug on one side and a socket on the opposite
side.
NOTE!
If polaritytest with EU version of Autopat FAILS the first time, tryto swap L and N
terminals oftested IEC cord and repeat the test. Ifresult is »PASS« at least one time,
then IEC Cord is OK, otherwise it is not.
3.2 Measurement limit values
Appliances are designed for different purposes and various supplyconditions. These
ranges ofconditions are covered byvarious general and product standards. A part of
the standards are requirements against electric shock with test conditions and limit
values. AutoPATMI 2143 is designed for test conditions and compares results
according to the standards mentioned in paragraph 1.3 Applied standards.
The following limit values are applied for the built-in functions:
230 V appliances
Test function Appliance
type Safetyclass Limit values Test condition
FUSE CLASS I 40 V
General CLASS II
CLASS I
IT CLASS II
30 kΩ
EARTH 25 A General CLASS I 25 A
IEC cord CLASS I 0.1 Ωand 0.5 Ω*
EARTH 100 mA ITCLASS I 0.1 Ωand 0.5 Ω*100 mA
INSULATION CLASS I 1 MΩ500 V
General CLASS II 2 MΩ
CLASS I 1 MΩ250 V
IT CLASS II 2 MΩ
IEC cord CLASS I 1 MΩ500 V
SUB LEAKAGE General CLASS I 40 V
ITCLASS I 0.75 mA and 3.5
mA*
POLARITYIEC cord CLASS I <50 V
110 V appliances
Test function Appliance
type Safetyclass Limit values Test condition
General CLASS I
EARTH 25 A IEC cord CLASS I 0.1 Ωand 0.5 Ω*25 A

MI 2143 AutoPAT Instrument description
10
EARTH 100 mA ITCLASS I 0.1 Ωand 0.5 Ω*100 mA
CLASS I 1 MΩ
General CLASS II 2 MΩ500 V
CLASS I 1 MΩ250 V
IT CLASS II 2 MΩ
INSULATION
IEC cord CLASS I 1 MΩ500 V
General CLASS I
SUB LEAKAGE ITCLASS I 0.75 mA and 3.5
mA*40 V
Note:When test result is between two limit values then PASS and appropriate test
function indicator are flashing. This is valid onlyifresults of other test are acceptable. If
result is out of the worst limit, FAIL indication is activated. In the case offlashing PASS
indicator the tested appliance can still be acceptable for known reason, e.g. long mains
cord.
In the case that numeric results are required, we recommend to test the appliance with
AlphaPATMI 2142, OmegaPAT MI 2140, or BetaPATMI 2141.
3.3 Test setup
For regular testing it is required to prepare appropriate test setup. This setup must
include all connectionsrequired for all measurements of particular appliance.
Following figures represent connectionsfor testing appliance.
APPLIANCE
UNDER
TEST
accessible
conductivepart
connectedtoPE
Connection of the CLASS I appliance
Note: Ifappliance contains accessible conductive parts not connected to PE, then the
test has to be repeated as for CLASS II appliance to test the insulation resistance of
those parts to L / N.

MI 2143 AutoPAT Instrument description
11
CLASS II
APPLIANCE
UNDER TEST
accessible conductivepart
not connected toPE
Connection of the appliance of CLASS II
IECCORD
UNDER
TEST
IEC cord connection
Connection of110 V appliances
Special adapter exists for testing 110 V appliances. The instrument automatically
detects this adapter and calculates sub-leakage current to 110 V.
Note: fuse pre-test and polarity(IEC cord) test are disabled.
Connecting 110 V adapter to the instrument
Measurement connections of tested 110 V appliances with this adapter are the same as
mentioned above.

MI 2143 AutoPAT Instrument description
12
3.4 Test procedure
Flowchart for automatic testing of 230 V appliances:
START
CLASS
&
Type
FUSE FUSE FUSE FUSE EARTH
25A
setto
CLASSI
EARTH
25A
Insulation
Sub
leakage
Insulation Insulation
EARTH
100mA
Insulation
Sub
leakage
Insulation
Polarity
FUSE
result
good
Rest
results
flashing
FUSE
PASS FAIL &
flashing
ENDEND
All good
Yes
No
Any onebad
CLASS I,General
CLASS II,General
CLASS I,IT
CLASS II,IEC cord
CLASSI,IEC cord
CLASS II,IT
PASS &
flashing
END
Any onebetweenits
highandlow limit
FAILlits continously,
flashing thetest with
bad result
PASSflashes,
flashing thetest with
result betweenlimits
PASS lits continously
all involvedtests lit
continously

MI 2143 AutoPAT Instrument description
13
Flowchart for automatic testing of 110 V appliances:
START
CLASS
&
Type
EARTH
25A
Insulation
Sub
leakage
Insulation Insulation
EARTH
100mA
Insulation
Sub
leakage
Results
PASS FAIL &
flashing
ENDEND
AllgoodAnyonebad
CLASS I,General
CLASS II,General
CLASS I,ITCLASS II,IT
PASS &
flashing
END
Any onebetween its
high and lowlimit
FAILlitscontinously,
flashing thetestwith
bad result
PASS blinks,
flashing thetestwith
result betweenlimits
PASS litscontinously
all involvedtestslit
continously

MI 2143 AutoPAT Technical specifications
14
4Technical specifications
Earth 25 A
Limit1 0.1 Ω±0.03 Ω
Limit2 0.5 Ω±10 %
Test current 25 A (100 mΩ, mains supplyvoltage: 230 V a.c.,
ambient temperature: 25 °C)
Open circuit voltage <6 V a.c. (mains supply voltage: 230 V a.c.)
Test duration 5 s
Output test socket (PE) to earth bond clip
Earth 100 mA
Limit1 0.1 Ω±0.03 Ω
Limit2 0.5 Ω±10 %
Test currents100 mA (100 mΩ, mains supplyvoltage: 230 V a.c.,
ambient temperature: 25 °C)
Open circuit voltage <6 V a.c. (mains supply voltage: 230 V a.c.)
Test duration 5 s
Output test socket (PE) to earth bond clip
Insulation resistance
Limit CLASS I 1 MΩ
Limit CLASS II 2 MΩ
Accuracy±10 %
Nominal voltage CLASS I IT 250 V d.c. (+10 %, -0 %; ≥250 kΩ)
Nominal voltage rests500 V d.c. (+10 %, -0 %; ≥500 kΩ)
Test current >1 mA at 500 kΩ@ 500 V; >1 mA at 250 kΩ@ 250 V
Short circuit current 1.3 mA
Test duration 5 s
Output CLASS I: test socket (L+N to PE); CLASS II: test
socket (L+N) to earth bond clip
Auto discharging after test. Yes
Substitute leakage current
Limit 0.75 mA, 3.5 mA
Accuracy±10 %
Open circuit voltage <50 V a.c. (mains supplyvoltage of230 V a.c.)
Short circuit current <40 mA
Test duration 2 s
Output test socket (L+N to PE)

MI 2143 AutoPAT Instrument description
15
Current scaled to 230 V
110 V with 110 V appliance adapter
Polaritytest
Test voltage up to 80 V d.c. / < 1 mA
DetectsPass, L-open, N-open, PE-open, L-N crossed, L-PE
crossed, N-PE crossed, L-N shorted, L-PE shorted,
N-PE shorted, multiple faults
Output test socket and IEC cord
Fuse pretest
Limit 30 kΩ
Accuracy±10 %
Test voltage <50 V a.c.
Output test socket (L to N)
General data
Rated supplyvoltage 210 V ÷264 V, 50 Hzor 60 Hz
Max. power consumption 1.3 A
Fuse T1.6 A / 250 V, 5 ×22 mm
Overvoltage category 300 V CATII
Protection classification II (double insulation)
Pollution degree 2
Display LED indicators
Dimensions (w*h*d) 26.5 cm × 11 cm × 18.5 cm
Weight (without accessories) 2.76 kg
Storage temperature range -10 °C ÷+70 °C
Reference / operating conditions
Temperature range 0 °C ÷+40 °C
Humidityrange 80 % RH (0 °C ÷+40 °C), no condensing
Reference voltage 230 V

MI 2143 AutoPAT Maintenance
16
5Maintenance
5.1 Periodic calibration
It is essential for all measurement instruments to be regularly calibrated. We
recommend calibration once per 12 months.
5.2 Fuse
The instrument contains amains fuse T1,6 A/250 V, 20 x5mm. It is located under
fuse cover.
N
L
F1
T1,6A
250V
K2
20311156 02.10.2003
F1
Mains fuse
To change the fuse:
Disconnect the instrument mainscord and all test leads before removing fuse cover!
Unscrewscrews on fuse cover (pos 6 ofbottom part) and remove cover
Replace blown fuse with the same type as mentioned above
Close fuse compartment and fixthe fuse cover.
Check the instrument.
5.3 Service
For repairs under or out ofwarrantyplease contact your distributor for further
information.
Unauthorized person is not allowed to open the AutoPATMI 2143. There are no user
replaceable components inside the instrument, except the fuse (refer to chapter 5.2
Fuse).

MI 2143 AutoPAT Instrument description
17
5.4 Cleaning
Use soft patch slightlymoistened with soap water or alcohol to clean the surface of
AutoPATMI 2143. Leave the instrument to dry totallybefore using it.
Notes:
Do not use liquids based on petrol or hydrocarbons!
Do not spill cleaning liquid over the instrument!

MI 2143 AutoPAT Instrument set and accessory
18
6Instrument set and accessory
Standard set
Instrument AutoPATMI 2143
Soft carrying case
Earth bond clip
User manual
Production verification data
Conformitydeclaration
Optional accessory
110 V test adapter