Megger MJOLNER 200 User manual

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User’s Manual
MJÖLNER 200/600
Micro-ohmmeter
Art No. ZP-BD02E Doc. BD0161OE V09a 2019

MJÖLNER 200/600
Micro-ohmmeter
NOTICE OF COPYRIGHT & PROPRIETARY RIGHTS
© 2013-2019, Megger Sweden AB. All rights reserved.
The contents of this manual are the property of Megger Sweden AB. No part of this work may be reproduced or transmitted in any form or
by any means, except as permitted in written license agreement with Megger Sweden AB. Megger Sweden AB has made every reasonable
attempt to ensure the completeness and accuracy of this document. However, the information contained in this manual is subject to change
without notice, and does not represent a commitment on the part of Megger Sweden AB. Any attached hardware schematics and technical
descriptions, or software listings that disclose source code, are for informational purposes only. Reproduction in whole or in part to create
working hardware or software for other than Megger Sweden AB products is strictly prohibited, except as permitted by written license
agreement with Megger Sweden AB.
TRADEMARK NOTICES
Megger® and Programma® are trademarks registered in the U.S. and other countries. All other brand and product names mentioned in this
document are trademarks or registered trademarks of their respective companies.
Megger Sweden AB is certified according to ISO 9001 and 14001.
User’s Manual
Postal address:
Megger Sweden AB
Box 724
SE-182 17 DANDERYD
SWEDEN
T [phone]
E [e-mail] www.megger.com
Visiting address:
Megger Sweden AB
Rinkebyvägen 19
SE-182 36 DANDERYD
SWEDEN
BD0161OE ZP-BD02E MJÖLNER 200/600 3

4MJÖLNER 200/600 ZP-BD02E BD0161OE
Contents
1 Safety
............................................................. 6
Symbols on the instrument.......................................... 6
Safety instructions....................................................... 6
2 Introduction
............................................................. 8
3 Control panel
........................................................... 10
4 Menu options
........................................................... 12
4.1 Main menu................................................12
Legend...................................................................... 12
4.2 Setup menu...............................................12
4.3 Result window ..........................................13
Memory.................................................................... 13
5 Operating instructions
........................................................... 14
5.1 General application....................................14
USB memory stick (optional)...................................... 14
Remote control (optional).......................................... 14
XLR Bluetooth dongle (optional)................................ 14
Temperature probe (optional) .................................... 15
5.2 Safety functions.........................................15
High temperature...................................................... 15
5.3 Printer........................................................16
Replacing printer paper............................................. 16
5.4 Run with MJÖLNER Win.............................16
Installing MJÖLNER Win ............................................ 16
Unlock the MJÖLNER ................................................ 16
5.5 Remote operation......................................17
Using the Remote control.......................................... 17
Using the XLR Bluetooth dongle................................ 17
5.6 Verify the measuring current ......................18
Shunt output ............................................................ 18
Verify the measuring function ................................... 18
5.7 Calibration and Service menu.....................19
Calibration................................................................ 19
5.8 Troubleshooting.........................................20
5.9 Optional accessories...................................20
MJÖLNER Win........................................................... 20
Remote control ......................................................... 21
XLR Bluetooth dongle .............................................. 21
Temperature probe.................................................... 21
Extension cables........................................................ 21
Calibration shunts..................................................... 21
DualGround kit ......................................................... 22
6 Application examples
........................................................... 24
6.1 Test a circuit breaker – both sides
grounded ................................................24
6.2 Measuring resistance at bus-bar joints........25
Measuring using the remote control.......................... 25
Measuring using an external voltmeter...................... 25
7 Specifications
........................................................... 28
MJÖLNER 200/600...........................................28
Index ....................................................... 30

BD0161OE ZP-BD02E MJÖLNER 200/600 5

6MJÖLNER 200/600 ZP-BD02E BD0161OE
1 SAFETY
1Safety
Symbols on the instrument
Caution, refer to accompanying docu-
ments.
Caution, risk of electric shock.
Protective conductor terminal.
WEEE, Waste Electrical and Electronic
Equipment. Please utilize your local
WEEE collection facilities in the dispo-
sition of this product and otherwise
observe all applicable requirements.
The unit can also be returned to
Megger at any timeat at no charge for
the disposal.
Information duty regarding substances
on REACH article 33, SVHC-list
This product contains a coin cell battery which con-
tains 1,2- dimethoxyethane (CAS 110-71-4) above
0.1% by weight.
Safety instructions
Important
Read and comply with the safety instruc-
tions.
Always comply with local safety regula-
tions.
Warning
1.
Before measuring resistance in circuit breakers
or disconnecting switches (isolators), always
check to see that the object being tested is
closed and grounded at least on one side.
2.
Do not connect the instrument to inductive
loads. This can cause high voltages when re-
moving the current clamps.
3.
After completing your measurements, you can
follow the normal procedures that are used to
demagnetize current transformer cores after DC
has passed through a current transformer.
4.
Never open a circuit breaker while MJÖLNER is
connected to it.
5.
Connection points for current cables can be-
come hot during current generation.
6.
Current continues to flow for a while after the
MJÖLNER is turned off. How long it continues
depends on the ratio of the components in the
L/R circuit.
7.
High voltage/current on input/output terminals.
8.
Do not attempt to service the instrument your-
self. Opening or removing covers may expose
you to dangerous voltage. If you attempt to
service the instrument yourself the warranty is
no longer valid.
9.
Do not use any accessories that are not intend-
ed for use together with the instrument.
10.
Disconnect the instrument from the mains be-
fore cleaning. Use a damp cloth for cleaning. Do
not use liquid cleaners or aerosol cleaners.
Important
1.
The instrument is intended for use in an in-
dustrial environment. It generates, uses and
can radiate radio frequency energy and, if not
installed and used in accordance with these
instructions, may cause interference to other
devices in the vicinity. If this equipment does
cause interference with other devices, which can
be determined by turning the equipment off
and on, the user is encouraged to try to correct
the interference by one or more of the following
measures:
▪Reorient or relocate the receiving device.
▪Increase the separation between the equipments.
▪Connect the equipment into an outlet on a circuit
different from that to which the other device(s) is
connected.
▪Consult the manufacturer or field service technician
for help.

BD0161OE ZP-BD02E MJÖLNER 200/600 7
1 SAFETY
2.
Always turn the equipment off before connect-
ing.
3.
The MJÖLNER is equipped with a mains plug
having a third (earthing, grounding) pin. This
plug will only fit into an earthing/grounding
type power outlet.
The outlet used should be tested regularly for
proper impedance of the protective earth wire.
4.
Always use manufacturer approved and sup-
plied cable sets.
5.
Always connect protective earth (ground).
Use the grounding cable connected to the
Grounding Terminal page described in chapter
"3 Control panel" on page 10
6.
Never leave the instrument unattended while it
is turned on.
7.
Use only approved mains detachable cable set
with the instrument. Main supply cables shall be
rated for the maximum current for the equip-
ment and the cable shall meet the requirements
of IEC 60227 or IEC 60245. Mains supply cables
certified or approved by a recognized testing
authority are regarded as meeting this require-
ment.
8.
Unplug the instrument from the mains supply
when it is left unattended or not in use.
9.
Do not expose the instrument to rain or mois-
ture.
10.
Refer all servicing to Megger authorized person-
nel.
11.
If you need to return the instrument, please use
either the original crate or one of equivalent
strength.

8MJÖLNER 200/600 ZP-BD02E BD0161OE
2 INTRODUCTION
2Introduction
The MJÖLNER 200 and 600 are designed to measure
the resistance of circuit breaker contacts, bus-bar
joints, contact elements in bus-bars and other high-
current links.
When contact resistance rises because of oxidation,
loosened or improperly tightened threaded joints,
temperatures rise abnormally at the points of contact.
This abnormal heating reduces conductivity thereby
accelerating the rise in temperature — and this often
leads to serious trouble.
The MJÖLNER micro-ohmmeters can be used to detect
such problems early so that they can be remedied
long before trouble starts. Checking contact resistance
at regular intervals provides a clear indication of the
state of your system.

BD0161OE ZP-BD02E MJÖLNER 200/600 9
2 INTRODUCTION

10 MJÖLNER 200/600 ZP-BD02E BD0161OE
3 CONTROL PANEL
3
Control panel
1 Grounding terminal
2 Connection for mains voltage
3 Switch for mains voltage
4 TEMP. SENSOR
This interface is for connection of a tempera-
ture probe for temperature compensating.
5 INTERFACE
For communication with PC and MJÖLNER Win.
6 DATALOGGER
Port to connect a USB stick for datalogging
(in .csv format) during a test. Results can be
viewed with Excel.
7 REMOTE
For connection of optional accessories like the
Remote control or the XLR Bluetooth dongle.
8 Printer
9 Keys to control the menu functions
10 Start/Stop key with status LED
11 Adjustment keys to set the measuring current
and all menu values
12 DC- current output
13 Sensing terminals
14 DC+ current output
15 Shunt output
16 Clamp sense input
12
14
13
The location of the current outputs on MJÖLNER 600.
6
9
4
1
16
8
5
7
2
15
14
13
12
10 11
3

BD0161OE ZP-BD02E MJÖLNER 200/600 11
3 CONTROL PANEL

12 MJÖLNER 200/600 ZP-BD02E BD0161OE
4 MENU OPTIONS
4Menu options
4.1 Main menu
A few seconds after instrument power up the "Main
Menu" will be displayed.
ENT ESC F1 F2 F3
Legend
Iset
Iset is the previously adjusted measuring current. By
using the <+> and <–> keys, right of the display, the
measuring current can be changed.
TpCmp
3.80 E-3 1/K
The temperature compensation is preset for copper. It
can be changed for other conductor materials.
Menu
By pressing the key <ENT>, you enter the system
menu. Further explanations see below.
Reslt
Press the key <ESC>, to display the measuring results.
100 / 150 / 200
Preselected values of the measuring current. Press
<F1>, <F2> or <F3> to set the measuring current
"Iset". The preset value can be changed in the setup
menu.
4.2 Setup menu
1] Press <ENT> to go to the "Setup Menu"
2] Use the keys <F1> and <F2> to move from
one menu item to another. Press <F3> to
select page 1/2 or 2/2 of the menu.
3] Press the keys <+> and <–>. to make the
desired settings.
4] Press <ENT> to confirm.
Press <ESC> to go back without any changes.
Contents of the setup menu
Menu
item
Legend Range of
values
SM0 Measure mode single
continuous
single = The measuring current only flows for a fix
given time.
continuous = The test current flows continuously until
it is interrupted by the user.
SM1 Preset Current 1 5 A to 200 A1)
5 A to 600 A2)
The adjusted value appears in the main menu above
the <F1> key.
SM2 Preset Current 2 5 A to 200 A1)
5 A to 600 A2)
The adjusted value appears in the main menu above
the <F2> key.
SM3 Preset Current 3 5 A to 200 A1)
5 A to 600 A2)
The adjusted value appears in the main menu above
the <F3> key.
SM4 Current Clamp on/off
SM5 0.10 … 20.00 mV/A Current Clamp. This item activates
the current clamp. If the item is switched to the on
position, the instrument immediately asks for the
clamp sensitivity. The sensitivity should be adjusted
to the value of the current clamp, the user wishes to
use. The instrument then calculates the current which
is bypassed by the grounding lanes and subtracts this
value from the measuring current which flows through
the equipment under test. The value of the sensitivity
is stored, even when the clamp is turned off.
SM6 Temp. compensation on/off
SM7 αcan be adjusted from -9.99 to 9.99 where 3.80 is
the value for copper at 20°C. For other materials this
value has to be changed to a value where the resist-
ance does not change when it is heating up or cooled
down.
SM8 Erase mesurements no/yes
Erase all measurements that are stored in the internal
memory.

BD0161OE ZP-BD02E MJÖLNER 200/600 13
4 MENU OPTIONS
Contents of the setup menu
Menu
item
Legend Range of
values
SM9 Buzzer On/Off
Key click and audio warning during the measurement.
SM10 Time format 12h/24h
SM11 Date format DDMMYY
MMDDYY
YYMMDD
SM12 Time 0 …12 / 0 …23
Adjust the hours of the internal clock.
SM13 Time 0 … 59
Adjust the minutes of the internal clock.
SM14
SM15
SM16
Date XX.XX.XX
SM17 Printer 0 … 9999
Counter for the printouts of the printer. Printouts will
be numbered continuously. This value defines the
number of the next printout.
SM18 Printer all values
summary
To get an extended printout with additional values on
the printer printout, this item needs to be switched on.
Values like shunt voltages and ramp times are printed
out. This is only possible for the actual measurement.
These additional values are not stored in the internal
memory and are lost, when moving to another result
in the memory.
SM19 Language English
Deutsch
Français
Espagñol
Svenska
SM20 Display Ueut yes/no
SM21 Auto pol detection:
Disables automatic correction of
sense polarity.
yes/no
SM22 Pass/Fail:
Enter submenu for changing limits
by the [Ent] key. In the submenu the
limits for the measurement analysis
may be changed.
change limits
1) MJÖLNER 200
2) MJÖLNER 600
4.3 Result window
After a measurement the result is shown on the
display. The result window can also be activated by
pressing the <ESC> key when in the main menu. Dur-
ing continuous mode, the result window is continu-
ously updated..
ESC F1 F2
ENT
▪The first row: Shows memory location, the resistance
result and the injected current.
▪The second row: Shows the time and date for the
measurement.
▪The third row: Shows clamp current if a clamp is used
(when testing with both sides grounded).
▪The fourth row: If temperature compensation is selected
in the "Setup menu" the "TpCmp" and value is shown.
▪The fifth row: If "Display Ueut" is selected in the "Setup
menu" the voltage across the test object is shown.
▪The last row has functions activated by the buttons:
ENT Press to print the result on the internal
printer
ESC Press to return to "Main Menu"
F1 Press to step back in memory
F2 Press to step forward in memory
Memory
Results are automatically saved in the memory in se-
quence 0 to 99 (100 results). When the memory is full
the old information will be overwritten in the same
sequence.

14 MJÖLNER 200/600 ZP-BD02E BD0161OE
5 OPERATING INSTRUCTIONS
5Operating instructions
5.1 General application
Important
Read and comply with the safety instruc-
tions.
Always comply with local safety regula-
tions.
Note If you are measuring resistance in a breaker or
disconnecting switch (isolator), make sure that
it is closed before starting. High current must
only flow throughout a short interval.
1] Make certain the mains are de-energized on
both sides of the breaker. Ground the break-
er at least on one side and make certain it is
closed.
2] Keep the MJÖLNER disconnected from the
mains while making connections.
3] Ground the MJÖLNER.
4] Connect one current cable between one
side of the object being tested and the DC+
terminal on MJÖLNER. Connect the other
current cable between the other side of the
object being tested and the COM terminal on
MJÖLNER.
5] Connect the two sensing cables on two sides
of the test object and as close to the test
object as possible.
Note The sensing cables must be connected inside
the current cables. Otherwise the test data
may be incorrect. See Fig. 5.1
Fig. 5.1 On MJÖLNER 600 the current outputs have reverse
position.
6] Connect the MJÖLNER to the mains and
switch it on.
7] Set the test current using the keys <+> and
<-> or use one of the preselected currents us-
ing the <F1>, <F2> or <F3>.
Note If you are using the instrument the first time,
make sure that the continuous mode (Setup
Menu SM0, see above) is not selected. Also
verify that the current clamp is switched off
(Setup Menu SM 4, see above).
8] Press the <START/STOP> key.
The measurement is announced by a red
blinking LED, and if activated a pulsating
audio alarm (Buzzer).
The result is shown after some seconds.
The result is saved, you can make a printout
and/or run a new test
9] You can stop the measurement by pressing
<START/STOP> or <ESC> keys.
10] Turn off and disconnect the MJÖLNER from
the mains before doing any disconnection
work or moving any cables or wiring.
USB memory stick (optional)
When performing a test and at the same time have
a USB memory stick, FAT32 formatted, connected to
the DATALOGGER connector. The test is saved in csv
format to the USB stick. The measurement can be
viewed in e.g. MS Excel.
Note If the USB stick contains many files the save
process may take longer time than with an
empty one.
Remote control (optional)
The remote control has most of the functionality in
the MJÖLNER such as starting and stopping, setting
the test current and read out the test values, see "5.5
Remote operation" on page 17
XLR Bluetooth dongle (optional)
MJÖLNER Win tests can be done remotely with an
android mobile, see "5.5 Remote operation" on page
17.

BD0161OE ZP-BD02E MJÖLNER 200/600 15
5 OPERATING INSTRUCTIONS
Temperature probe (optional)
The temperature probe is used for temperature com-
pensation of conductors (copper and other metals). See
"SM7" in section "4.2 Setup menu" on page 12.
1] Connect the cable to the TEMP. SENSOR ter-
minal on MJÖLNER.
2] Attach the sensor tight and to the midpoint
of the test object.
5.2 Safety functions
High temperature
If the temperature in MJÖLNER rises too high, the
instrument automatically starts to derate the current.
When the internal temperature rises above 50ºC, the
instrument starts to reduce the maximal current. The
derating between 50ºC and 70ºC is linear.
At 60ºC you get about 150 A (MJÖLNER 200).
At 60ºC you get about 450 A (MJÖLNER 600)
At 70ºC you get 100 A (MJÖLNER 200).
At 70ºC you get 300 A (MJÖLNER 600)
Above 70ºC, the unit will shut off and indicates an
error message.
The temperature must drop before you can continue.

16 MJÖLNER 200/600 ZP-BD02E BD0161OE
5 OPERATING INSTRUCTIONS
5.3 Printer
The thermal printer needs no service except from
replacing the paper roll.
Replacing printer paper
1] Open the printer by pulling the transparent
lid upwards until the cover snaps up. Then
open the cover, see figure below.
2] Remove the empty roll and put the new one
into place.
Note See section "7 Specifications" for printer
paper information.
5.4 Run with MJÖLNER Win
MJÖLNER Win software is delivered on a CD together
with MJÖLNER.
Note To use MJÖLNER Win together with a
MJÖLNER200/600 a software code has to be
entered to unlock the MJÖLNER.
The software code is an optional accessory
and must be ordered.
Installing MJÖLNER Win
Note For Win 8 and Win 10. You need to have
administrator rights to install it.
Right click the program when you run the
install and select "Install as administrator".
1] Insert the MJÖLNER Win CD into the PC and
click "Run Set-up.exe".
Unlock the MJÖLNER
1] Press and hold <F1> and <F2> while switch-
ing on MJÖLNER.
2] In the "Service menu"go to menu item "S7"
and enter the software code. See section "3"
on page 10.
When MJÖLNER is unlocked, "*PC" is shown in the
start up menu.
Connect a PC to MJÖLNER
1] Connect a USB A/B cable between MJÖLNER
and PC.
2] From MJÖLNER Win main menu, select “File”
and “Options”.
3] Set the COM port used. Check the COM port
on the computer(device manager).
4] Select “Instrument” and “Remote control”.
Note: If the communication is not correct a demo
menu version will be displayed.
Test set up
1] Select “File” and “New breaker/test object”
2] Type in object test nameplates and location
on PC to save the tests.
3] New test is started from MJÖLNER Win with
the “Start/Stop” button.
4] Test can also be started from any of the pre-
set current buttons. For example clicking on
“Set current 2”.
5] Select “File” and “Open breaker/test object”
to list previous tests.

BD0161OE ZP-BD02E MJÖLNER 200/600 17
5 OPERATING INSTRUCTIONS
6] Select “File” and “Print/Export into file” for
printout of test to .csv(Excel) format or save
to PDF.
See below PDF print out.
Note You can add comments to the test report by
double clicking the comments row.
When selecting “Instrument” and “Readout
instrument memory” all existing tests in
MJÖLNER will be listed in MJÖLNER Win.
5.5 Remote operation
Note The Remote control is an optional accessory.
Using the Remote control
The remote control has most of the functionality in
the MJÖLNER such as starting and stopping, setting
the test current and read out the test values.
1] Connect the Remote control cable to the
"REMOTE" terminal on MJÖLNER.
2] Connect the sensing leads to the two banana
sockets or to the sockets on MJÖLNER.
Using the XLR Bluetooth dongle
Note The XLR Bluetooth Dongle is an optional ac-
cessory.
If MJÖLNER is locked for use with MJÖLNERWin
▪The use of a current clamp and temp sensor is not
activated.
▪The buzzer function is not enabled.
▪Previous tests made on MJÖLNER cannot be read out from
MJÖLNER.
If MJÖLNER has been unlocked for use with
MJÖLNERWin
▪You can email test results.
▪You can use the current clamp and temp sensor function.
Setup for the XLR Bluetooth dongle
1] From the android mobile, download the app
“Micro-Ohmmeter Remote”.
2] Enable the Bluetooth function on the mobile.
3] Connect the XLR Bluetooth Dongle to the
"REMOTE" terminal on MJÖLNER.
4] Start the Megger Micro-Ohmmeter app
in the mobile
5] Press on the “SCAN” area.
After a while the Bluetooth communication
is enabled.
6] Press the “MOM Remote” area.

18 MJÖLNER 200/600 ZP-BD02E BD0161OE
5 OPERATING INSTRUCTIONS
The XLR bluetooth dongle will light up.
The below menu appears on the mobile.
7] Make your settings.
8] Press the “Start Measurement” button.
Measurement results can be sent (in .csv for-
mat) via email for later retrieval.
5.6 Verify the measuring
current
Important
Read and comply with the safety instruc-
tions.
Always comply with local safety regula-
tions.
Shunt output
1] Connect mV-meter to the SHUNT OUTPUT.
2] Short circuit the current outputs.
3] Set the test current to 100A and press START.
4] Read out the mV value and then press STOP.
5] Calculate the measured current.
Shunt voltage is 100µV/A for MJÖLNER 600
Measured current = measured mV / shunt
voltage.
For example: 10mV / 100µV/A = 100A
Shunt voltage is 300µV/A for MJÖLNER 200
In this example: 30mV / 300µV/A = 100A
Verify the measuring function
1] Short circuit the current outputs.
2] Connet the sense cables from the SHUNT
OUTPUT to the SENSE input.
3] Sart a 100A single measurement.
Read out the value on the screen.
Example for MJÖLNER 600: 99.6µΩ
This value must be the same as in the calibra-
tion certificate (see "Shunt output value")
Example for MJÖLNER 200: 300µΩ
This value must be the same as in the calibra-
tion certificate (see "Shunt output value")

BD0161OE ZP-BD02E MJÖLNER 200/600 19
5 OPERATING INSTRUCTIONS
5.7 Calibration and Service
menu
Calibration
1] Switch on MJÖLNER and let it be on for
about 20 minutes before starting the calibra-
tion.
2] Connect an external calibrated current shunt
200 A 20 mV ±0.1% (MJÖLNER 200),
600 A 60 mV ±0.1% (MJÖLNER 600) to DC+
and COM outputs and SENSE inputs.
Note The high current cable (35mm2) should have a
minimum length of 1 m.
3] Set test current to:
100 A (MJÖLNER 200)
300 A (MJÖLNER 600)
and make a measurement. (See section "5
Operating instructions", points 6 to 10)
4] Note the result and turn off MJÖLNER.
5] Press and hold <F1> and <F2> while switch-
ing on MJÖLNER.
6] In the "Service menu" – go to "Calibration".
7] Set the "Gain adjust" value (possible to set
between 0.700 – 1.300) so that the displayed
value corresponds to the shunt value.
8] Example: If the shunt value is 100 μΩ and the
displayed value is 101 μΩ you should lower
the "Gain adjust" value. Set it to 0.99.
9] Press <ESC> and make a new measurement.
10] If the measured value corresponds to the
shunt value the calibration is ready if not
repeat the procedure.
Service menu description
Menu item Legend
S1 Calibration See "3" on page 10
S2 Shunt Only for manufacturer service
S3 t rising edge Set the time of the rising slope/ramp
up 1-3 s (M200 1-30 s). Default 1 s.
S4 t holding Set the time for the holding/measur-
ing time 0.5-10 s (M200 0.5-30 s).
Default 3 s.
S5 t falling edge Set the time for the falling slope/
ramp down 0.5-3 s (M200 0.5-30 s).
Default 1 s.
S6 Current source adj. Only for manufacturer service
S7 Software enable code Enter the SW code here if ordered
separately after delivery of the
MJÖLNER.
S8 Enable data output MJÖLNER will send out a data string
after each completed measurement.
S9 Enable data comm Enables the possibility to control
MJÖLNER from a PC.
Note: Enabling the communication
protocol S9 disables the MJÖLNER
Win protocol.
S10 Advanced data logging Enables the possibility to trouble-
shoot potential problem.

20 MJÖLNER 200/600 ZP-BD02E BD0161OE
5 OPERATING INSTRUCTIONS
5.8 Troubleshooting
Fault Possible cause Remedy
I ≠ Iset lamp lit
(on panel)
Resistance too high
for the selected
current
Reduce the current
Sense line
broken!
(on display)
Sense line defective
or broken.
Since the sense volt-
age is so low, the
instrument can have
difficulties to detect
the polarity. This
would lead to the
"sense line broken"
error.
Verify the sense line
connections.
For resistances
below 10micro
Ohms, the auto-
matic detection of
the polarity can be
deactivated in the
menu.
To avoid this, set
the manual sense
line detection and
verify the correct
plolarity of the
sense lines.
Overflow
(on display)
Resistance higher
than 999.9 mΩ
Bad connection
and/or test object
Thermal shut
down
The temperature is
too high
Let the instrument
cool down
No current
generated
Unstable or irregular
mains power supply
Set mains switch to
off, wait at least 3
minutes and then
switch on
Note Always set the current clamp to “Off” when
not in use. Not doing this will reduce the mea-
surement accuracy at low currents (<100A).
5.9 Optional accessories
Item Art. No.
MJÖLNER Win
Software key code for unlocking the MJÖLNER BD-8010X
Remote control
With 5 m (16 ft) cable BD-90010
XLR Bluetooth dongle BD-9 0 011
Temperature probe BD-90012
Thermal paper roll (for printer) G C- 0 012 0
Extension cable set 5 m
Current cables 2 x 5 m, 35 mm2and sensing cables
2 x 10 m
GA-03209
Extension cable set 10 m
Current cables 2 x 10 m, 35 mm2and sensing cables
2 x 15 m
GA-03210
Calibration kit MJÖLNER 200
200 A / 20 mV shunt BD-90022
Calibration kit MJÖLNER 600
600 A/60 mV shunt BB-90020
DualGround kit
DC Current clamp 200 A (incl. cables) XA-12992
MJÖLNER Win
The MJÖLNER Win program makes it easy to manage/
save all test results in a simple way. All information,
meta-data of the test object e.g. a circuit breaker and
the test results are stored together and they can easily
be transferred to Microsoft® Excel for further analysis.
In MJÖLNER Win you can also save test files and print
out test reports.