METREL BetaPAT MI 2141, OmegaPAT MI 2140 User Manual
Portable Appliance Testers
OmegaPAT MI 2140
BetaPAT MI 2141
User Manual
Ver. 1.2. Code No. 20 750 684
2
Distributor:
Producer:
METREL d.d.
Ljubljanska 77
SI-1354 Horjul
E-mail: metrel@metrel.si
http://www.metrel.si
Mark on your equipment certifies that this equipment meets the requirements of the EU
(European Union) concerning safety and interference causing equipment regulations
© 2002…2007 Metrel
No part of this publication may be reproduced or utilized in any form or by any means
without permission in writing from METREL.
MI 2140 MI 2140 Omega &BetaPAT Table of contents
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1. 1. General presentation------------------------------------------------------------------------------5
1.1. Safety in use -----------------------------------------------------------------------------------------5
1.2. Features ----------------------------------------------------------------------------------------------- 6
1.3. Connection-------------------------------------------------------------------------------------------- 7
1.4. Applied standards-----------------------------------------------------------------------------------7
2. 2. Instrument description----------------------------------------------------------------------------8
2.1 Front panel description -----------------------------------------------------------------------------8
2.2. Instrument messages ----------------------------------------------------------------------------- 9
3. 3. Technical specification ------------------------------------------------------------------------- 11
3.1 Earth bond test ------------------------------------------------------------------------------------- 11
3.2 Insulation test --------------------------------------------------------------------------------------- 11
3.2 Substitute leakage test --------------------------------------------------------------------------- 12
3.3 Flash test (MI2140 only)-------------------------------------------------------------------------- 12
3.4 Leakage current and Power test --------------------------------------------------------------- 12
3.5 Touch leakage current---------------------------------------------------------------------------- 13
3.6.Polarity test ------------------------------------------------------------------------------------------ 13
4. Measurements ---------------------------------------------------------------------------------------- 14
4.1. Presentation of results --------------------------------------------------------------------------- 14
4.1.1. PASS / PASS * / FAIL result -------------------------------------------------------------- 14
4.2. Manipulation---------------------------------------------------------------------------------------- 14
4.2.1. Help option ------------------------------------------------------------------------------------ 14
4.3. Single mode ---------------------------------------------------------------------------------------- 15
4.3.1. Earth bond test ------------------------------------------------------------------------------- 16
4.3.2. Insulation test --------------------------------------------------------------------------------- 18
4.3.3. Substitute leakage test --------------------------------------------------------------------- 21
4.3.4. Flash test (MI2140 only) ------------------------------------------------------------------- 23
4.3.5. Leakage current and Power test --------------------------------------------------------- 26
4.3.6. Touch leakage current---------------------------------------------------------------------- 28
4.3.7. Polarity test------------------------------------------------------------------------------------ 30
4.4. Autotest---------------------------------------------------------------------------------------------- 31
4.5. Autotest - shortcut -------------------------------------------------------------------------------- 31
4.6. Autotest – custom--------------------------------------------------------------------------------- 34
4.7. Performing of autotests-------------------------------------------------------------------------- 36
4.8. Storing autotest results -------------------------------------------------------------------------- 43
5. Instrument operation ------------------------------------------------------------------------------- 45
5.1. Setup ------------------------------------------------------------------------------------------------- 45
5.1.1. Set date and time ---------------------------------------------------------------------------- 45
5.1.2. Set language---------------------------------------------------------------------------------- 45
5.1.3. Set print header ------------------------------------------------------------------------------ 46
5.1.4. Instrument data------------------------------------------------------------------------------- 46
5.1.5. Set Contrast----------------------------------------------------------------------------------- 46
5.1.6. Original settings ------------------------------------------------------------------------------ 47
5.1.7. Password -------------------------------------------------------------------------------------- 48
5.2. Autotests controlled by test code (use of barcode reader)------------------------------ 49
5.3. Edit users ------------------------------------------------------------------------------------------- 49
5.4. Recall / Delete / Send memory ---------------------------------------------------------------- 50
6. Maintenance ------------------------------------------------------------------------------------------- 55
MI 2140 MI 2140 Omega &BetaPAT General presentation
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6.1. Inspection ------------------------------------------------------------------------------------------- 55
6.2. After sales service -------------------------------------------------------------------------------- 55
6.3. Replacing the fuses------------------------------------------------------------------------------- 55
6.4. Cleaning --------------------------------------------------------------------------------------------- 55
7. General information--------------------------------------------------------------------------------- 56
8. Sets and Accessories ------------------------------------------------------------------------------ 57
9. Appendix 1 --------------------------------------------------------------------------------------------- 58
MI 2140 MI 2140 Omega &BetaPAT General presentation
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1. 1. General presentation
1.1. Safety in use
• If the test equipment is used in manner not specified in this user manual the
protection provided by the equipment may be impaired!
• Read this instruction manual carefully, or use of the instrument may be dangerous
for the operator, for the instrument or for the equipment under test!
• Use only earthed mains outlets to supply the instrument!
• Do not use any damaged instrument, mains outlet, measurement leads or
damaged mains connection cable!
• A competent authorized person must carry out service, adjustment, or calibration
procedure!
• Only a competent person, familiar with hazardous voltage operations, should use
OmegaPAT and BetaPAT testers!
• During the measurements the appliance under test or the test leads should NOT
be touched – possible hazardous voltage.
• In case of abnormal behavior disconnect the instrument and return it to
manufacturer / distributor for service.
• Always handle the instrument as if the test sockets and leads have hazardous
voltages present.
• In some countries the leakage and touch leakage current measurements shall be
executed for normal connection of tested equipment and also for the connection
with changed L and N. It is advised to prepare appropriate test set-up for the test
with the changed lines. Consider local regulations.
Meaning of , signs on front panel:
Input section ............................................ Sw itch off the instrument and disconnect all
test cables and mains cord before replacing
the fuses or opening the instrument
Flash terminal (MI2140 only)................... Dangerous voltage may be present.
Always handle as if the test leads are
energized.
FLASH
T16A/250V
T16A/250V
F1
F2
230V
50/60 Hz
16A
115V~/ ~
MI 2140 MI 2140 Omega &BetaPAT General presentation
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Other terminals........................................Disconnect all equipment from the
instrument during the test except for the
equipment under test.
IEC cord connector is for test purposes only;
do not connect it to mains supply!
Dangerous voltage is present on the test
sockets during the measurement.
Measurements should only be carried out on
de-energized appliances.
Test sockets are intended only for
connection of tested appliance!
Maximum output current of any of two test
sockets (230 V / 115 V) is 16 A.
1.2. Features
Portable appliance testers MI2140 and MI2141 are instruments intended for testing the
safety of portable electrical equipment.
General functions of MI2140 and MI2141:
- Visual test.
- Earth bond test.
- Insulation test.
- Substitute leakage test.
- Flash test (MI2140 only).
- Leakage test.
- Touch leakage test.
- Functional (power) test.
- IEC cord test.
Benefits of MI2140 and MI2141:
- Fast and reliable performance of all tests necessary for testing the safety
of portable appliances.
- Large graphic LCD display with resolution of 240 x 128 dots, with back-
light.
- Over 4000 memory locations in data flash memory.
- Two RS232C communication ports for communication with PC, bar code
reader or printer.
- Soft touch keyboard with cursor keys.
- Built in real time clock.
The instrument is supplied with all necessary accessories for carrying out the tests.
EARTH BONDIEC CORD
MI 2140 MI 2140 Omega &BetaPAT General presentation
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1.3. Connection
The tester may be powered with 115 V or 230 V supply voltage, and will test appliances
for both voltages (depending on supply voltage). LED indicator adjacent to the test
socket denotes which test socket is active.
The supply must include an earth connection.
1.4. Applied standards
Instrument operation:
- British standards BS 89,
- German standards VDE 0701 and VDE 0702.
Safety and electromagnetic compatibility (EMC):
- EN 61010 -1,
- IEC 61326.
MI 2140 MI 2140 Omega &BetaPAT Instrument description
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2. 2. Instrument description
2.1 Front panel description
T16A/250V
T16A/250V
F1
F2
230V
50/60 Hz
16A
115V~/ ~
RS232C
BARCODE / PRINTER
EARTH BONDIEC CORD
FLASH
1
2
3
4
5
6
7
8
9
10
11
12
13
17
16
14
15
Fig. 2.1 Front panel layout
Legend:
1. Power ON/OFF switch with indication lamp.
2. T 16A 250V fuses protect instrument power supply.
3. Mains supply.
4. Graphic LCD, 240 x 128 dots, with backlight.
5. Flash test terminal (MI2140 only).
6. IEC lead connector.
7. EARTH BOND connector, also used as touch leakage input for some Class II tests.
8. 115 V socket
9. 230 V socket
MI 2140 MI 2140 Omega &BetaPAT Instrument description
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10. Cursor keys:
• UP / DOWN key, to increase / decrease edited value,
• LEFT / RIGHT key, to move between edited values,
• ENTER key, to confirm selection in menu.
11. Keyboard.
12. STOP key.
13. START key.
14. ESC key, to return to previous page in menu.
15. Function keys, to set various parameters in each function. The purpose of a
specific key in each function is marked on display.
16. RS 232 connector for communication with a PC.
17. Barcode reader / printer connector.
2.2. Instrument messages
Description of displayed messages:
L and N are CROSSED.
Press Start to continue
Check the wiring of supply.
Mains voltage is not correct
or PE not connected.
Check Mains voltage and PE
connection!
Check for incorrect wiring of supply – there is no
earth connection or mains voltage is incorrect.
L-N RESISTANCE TOO HIGH
(>30 kΩ)
CHECK SWITCH OR FUSE
Do you wish to PROCEED
(Y/N)?
Resistance between L and N of appliance under
test is higher than 30 kΩ – check the appliance
power switch or fuse.
L-N SHORTED (< 3.0 Ω)
Do you wish to PROCEED
(Y/N)?
Resistance between L and N of appliance under
test is lower than 3 Ω - possible short-circuit or
high inrush current – check the appliance.
L-N RESISTANCE TOO LOW
( 8.0 Ω)
Do you wish to PROCEED
(Y/N)?
Resistance between L and N of appliance under
test is lower than 20 Ω - current may be higher
than 16 A – check the appliance.
LEAKAGE TOO HIGH
( >20.0mA)
Do you wish to PROCEED
(Y/N)?
Leakage current in pre-test is too high –
potential danger to operator and damage to
appliance if test is continued.
NAME OF TEST
Test was skipped for SAFETY
Potential hazardous tests were skipped because
one or more results were out of limit in
measurements of earth bond, insulation or
substitute leakage.
MI 2140 MI 2140 Omega &BetaPAT Instrument description
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VOLTAGE ON
SOCKET FROM APPLIANCE
Measurement is ABORTED
An external voltage is present on test socket –
check measurement circuit.
OVERHEATED
Measurement is ABORTED
The instrument was overheated during the
measurement of earth bond – allow the
instrument to cool down before proceeding with
the measurements.
High DC voltage between L-N and PE on test
socket (during insulation test).
(MI2140 only)
Presence of dangerous HV voltage during Flash
test.
1500V between L-N and PE on test socket
3000V between Flash terminal and L-N on test
socket.
Dangerous mains voltage on test socket (during
Leakage/Power and Touch Leakage tests).
Device under test must be switched on during
test
EB
CLIP
Use Earth Bond clip in this test.
Ensure that the Earth Bond clip is not connected
to any part of the appliance that may heat up or
rotate when switched on.
IEC
PLUG
Connect the lead to be tested to the IEC plug.
Note:
• The ‘L-N resistance too high’ message is shown if the L-N circuit pretest fails.
In this case it is recommended to check whether the power switch is switched on
and/or the mains fuse is not broken.
This pretest is performed:
- Before the first Insulation, SubLeakage, Leakage, Touch Leakage test in the
SINGLE TEST menu.
- Before the one test of Insulation, SubLeakage, Leakage, Touch Leakage (whichever
is selected first) in AUTOTEST – SHORTCUT and AUTOTEST – CUSTOM menus.
This pretest is skipped for Polarity test.
MI 2140 MI 2140 Omega &BetaPAT Instrument description
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3. 3. Technical specification
3.1 Earth bond test
Earth bond resistance (4 A, 10 A, 25 A)
Range R Resolution Accuracy (after calibration)
0.00 –1.99 Ω 0.01 Ω ±(5 % of reading + 3 digit)
2.00 –19.99 Ω 0.01 Ω ±10 % of reading
Earth bond resistance (100 mA)
Range R Resolution Accuracy (after calibration)
0.00 –1.99 Ω 0.01 Ω ±(5 % of reading + 3 digit)
Indication range: 2.00 –19.9 Ω
Test currents: 100 mA, 4 A, 10 A, 25 A into 100 mΩ at mains voltage of 240 VAC
Open circuit voltage: <6 VAC, (2.2 VAC at 100 mA) at U
mains
= 240 VAC
Limits: 0.01 - 0.09 Ω, 0.10 - 0.90 Ω, 1.00 - 9.00 Ω
Timer: 2 s, 3 s, 5 s, 10 s, 30 s
Output: EARTH BOND clip, 115 V or 230 V socket
3.2 Insulation test
Insulation resistance readout
Range Resolution Accuracy
0.000 – 0.500 MΩ 0.001 MΩ ±(10 % of reading + 5 digit)
0.500 –1.999 MΩ 0.001 MΩ
2.00 –19.99 MΩ 0.01 MΩ ±(5 % of reading + 3 digit)
20.0 – 199.9 MΩ 0.1 MΩ
Nominal voltage: 250 VDC, 500 VDC (-0 % / +10 %)
Nominal current: 1 mA @ 250 kΩ (250 V)
1 mA @ 500 kΩ (500 V)
Short circuit current: 2 mA max.
Limits: 0.50 MΩ, 1.00 MΩ, 2.00 MΩ, 4.00 MΩ, 7.00 MΩ, 10.0 MΩ, 50.0 MΩ
Auto discharging after test
Timer: 2 s, 3 s, 5 s, 10 s, 30 s
Output: 115 V or 230 V socket
MI 2140 MI 2140 Omega &BetaPAT Instrument description
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3.2 Substitute leakage test
Substitute leakage current readout
Range Resolution Accuracy
0.00 – 19.99 mA 0.01 mA
±(10 % of reading + 5 digit)
Short circuit current: < 30 mA
Open circuit voltage: 40 V AC
Displayed substitute current is calculated to 115 V, 230 V, depending on mains
voltage
Limits: 0.25 mA, 0.50 mA, 0.75 mA, 2.50 mA, 3.50 mA, 7.00 mA, 9.90 mA, 15.00 mA
Timer: 2 s, 3 s, 5 s, 10 s, 30 s
Output: 115 V or 230 V socket
3.3 Flash test (MI2140 only)
Flash current readout
Range Resolution Accuracy
0.00 - 2.50 mA 0.01 mA
±(5 % of reading + 5 digit)
Test voltage: 1500 VAC, 3000 VAC
Output resistance: 480 kΩ@1500 V, 960 kΩ@3000 V
Limits: 1 mA, 1.5 mA, 2.0 mA, 2.25 mA
Timer: 2 s, 3 s, 5 s, 10 s, 30 s
Output: For Class I appliance 115 V or 230 V sockets
For Class II appliance 115 V or 230 V sockets and Flash terminal
3.4 Leakage current and Power test
Differential leakage current readout
Range Resolution Accuracy
0.00 – 10.00 mA 0.01 mA
±(5 % of reading + 5 digit)
Threshold limits: 0.25 mA, 0.50 mA, 0.75 mA, 1.00 mA, 1.50 mA, 2.25 mA, 2.50 mA,
3.00 mA, 3.50 mA, 9.90 mA
Timer: 2 s, 3 s, 5 s, 10 s, 30 s, 60 s, 120 s, 180 s
Output: 115 V or 230 V socket
MI 2140 MI 2140 Omega &BetaPAT Instrument description
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Power readout
Range Resolution Accuracy
0.00 – 4.00 kVA 0.01 kVA
±(5 % of reading + 3 digit)
Timer: 2 s, 3 s, 5 s, 10 s, 30 s, 60 s, 120 s, 180 s
Output: 115 V or 230 V socket
3.5 Touch leakage current
Touch leakage current readout
Range Resolution Accuracy
0.00 – 1.99 mA 0.01 mA
±(10 % of reading + 5 digit)
Threshold values: 0.25 mA, 0.50 mA, 1.00 mA
Timer: 2 s, 3 s, 5 s, 10 s, 30 s, 60 s, 120 s, 180 s
Output: 115 V or 230 V socket
R
A-meter
: 2 kΩ
3.6.Polarity test
Test voltage: < 50 V
Output: 230 V / 115 V socket and IEC cord
Results: PASS, L-PE short, N-PE short, L-N short, L open, N open, PE open, N -PE
crossed, L-PE crossed, L-N crossed, MULTIPLE FAULT
MI 2140 MI 2140 Omega &BetaPAT Instrument description
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4. Measurements
4.1. Presentation of results
4.1.1. PASS / PASS * / FAIL result
Depending on the limit set in the selected test, the result is marked either with a PASS
or FAIL message. Limits are shown in the upper right corner of the display.
The message is always displayed as well as the actual measured result (except in
visual test).
A conditional PASS (PASS*) message is shown if one or more tests in the set Autotest
routine are skipped or aborted. In this case all performed tests must PASS. Otherwise,
FAIL is shown.
4.2. Manipulation
After start–up of the instrument, the MAIN MENU is displayed:
Fig. 4.1 Main menu
To select an option from the menu, use UP and DOWN keys. The selected option will
be highlighted. The selection is confirmed with the ENTER key. To return into MAIN
MENU from any sub-menu, press the ESC key.
4.2.1. Help option
In all measurements a help menu is available with connection diagram and instructions
on how to perform the test. Where there are two options (Class I or Class II appliance),
descriptions for both are available. The last page (or two) of the help menu provides
guidance on why a test may fail (e.g. connection problems). An example help menu for
earth bond measurement is presented in the following figures.
MI 2140 MI 2140 Omega &BetaPAT Instrument description
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Fig. 4.2 Earth bond display example
→Press key F2 (HELP)→
Fig. 4.3 Help example for earth
bond test connection
→
Press
PgUp →
Fig. 4.4 Help for reasons of failed
earth bond test
4.3. Single mode
In single mode individual tests can be performed. This is suitable in cases when the
appliance fails in one or more tests. After repairing the appliance it is wise to retest that
particular function. In this mode it is not possible to save the result, because it is only
intended to check the effectiveness of the repair. After the successful repair the
complete appliance test has to be performed.
In single mode the SINGLE MODE menu is displayed:
Fig. 4.5 Single mode menu
To select an option from the menu, use the UP and DOWN keys. The selected option
will be highlighted. The selection is confirmed with the ENTER key. To return to the
previous menu, press the ESC key.
In every test it is possible to set measurement parameters. If the limits are saved, they
will be used for all future measurements in the single mode function. If they are not
saved and the measurement is started with the START key, the settings are used until
exit from the single mode function, then they are returned to the previous settings.
MI 2140 MI 2140 Omega &BetaPAT Instrument description
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4.3.1. Earth bond test
The purpose of this test is to ensure that the resistance of connections between the
earth wire in the mains supply plug and the grounded metal parts of an appliance is
below allowed limits. The resistance limit, duration of measurement, output current and
the number of measurements are selectable according to the requirements. Before
testing, check that the test will not cause any damage to the appliance. Test with a
maximum current of 100 mA is applied when higher current can cause damage. This is
often necessary when computers or other information technology appliances are
checked.
Earth bond test of Class I appliances
For Class I appliances the test voltage is applied between PE terminal (L and N line are
of no importance) and Earth Bond clip.
OR
A
PPLIANCE
UNDER
TEST
Fig. 4.6 Connection for Class I appliance
Earth Bond test of IEC leads
When testing IEC leads, the lead end should be connected to the IEC CORD terminal.
This is convenient when performing a complete IEC CORD test (no need for
reconnection during test, no need for adapters).
IEC CORD
UNDER
TEST
Fig. 4.7 Earth bond test of IEC cord
MI 2140 MI 2140 Omega &BetaPAT Instrument description
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How to carry out single Earth Bond resistance measurement:
STEP 1. In the MAIN MENU window select SINGLE TEST and confirm with the
ENTER key.
STEP 2. In the SINGLE TEST window select EARTH BOND and confirm with the
ENTER key.
Fig. 4.8 Earth bond test initial display
STEP 3. The parameters of the measurement are detailed in the upper right corner of
the display. To change these parameters, first press the F1 (EDIT) key and
then use cursor keys to set relevant parameters. The selected limit is
changed with the UP and DOWN keys, movement between parameters is
possible with the LEFT and RIGHT keys. To save new limits press the F1
(SAVE) key. The test can now be performed.
Fig. 4.9 Selection of test current
STEP 4. Press START key to perform the test.
STEP 5. PASS/FAIL result is shown on the display. Repeat the test with the START
key or return to SINGLE MODE main screen with the ESC key.
MI 2140 MI 2140 Omega &BetaPAT Instrument description
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Fig. 4.10 Good result example
Fig. 4.11 Bad result example
The test can be aborted with the STOP key at any time, but in such case there is no
PASS / FAIL decision.
Fig. 4.12 Indication of aborted measurement
Note:
• Consider any warning on the display (see Chapter 2.2) before starting
measurement.
4.3.2. Insulation test
The purpose of this test is to ensure that the insulation resistance between the live
conductors and the earth or metal parts of an appliance is within allowed limits. The test
voltage, resistance limit, duration of measurement and number of measurements are
selectable according to requirements.
Check to ensure that the appliance under test does not contain any over voltage
protection device, otherwise incorrect results could be obtained.
Insulation test of Class I appliances
For Class I appliances the test voltage is applied between the live pins (L and N are
shorted together in the tester) and the earth pin in an appliance mains plug.
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