DV Power RMO100G User manual

RMO100G
MICROOHMMETER
Manual

2
RMO100G Contents
Contents
1 Introduction.........................................................................................................................................3
2 Safety Instructions...............................................................................................................................3
3 Designated Use ..................................................................................................................................4
4 Functionality........................................................................................................................................4
5 Description..........................................................................................................................................6
6 Getting Started....................................................................................................................................9
7 DV-Win Software...............................................................................................................................16
8 Remote Control.................................................................................................................................24
9 Error Messages.................................................................................................................................24
10 Technical Data..................................................................................................................................27
11 Accessories.......................................................................................................................................30
Manufacturer Contact Information..........................................................................................................30
Manual Version: RMO100G MV.10.02
This Manual refers to the firmware version RO1-10.02
IBEKO Power AB 2012
This Manual is a publication of IBEKO Power AB, 181 33 Lidingö, Sweden.
All rights including translation reserved. Reproduction of any kind, e.g., photocopying, microfilming or storage in
electronic data processing systems, requires the explicit consent of IBEKO Power AB. Reprinting, wholly or in part,
is not permitted.
This Manual represents the technical status at the time of printing. The product information, specifications, and all
technical data contained within this Manual are not contractually binding. IBEKO Power AB reserves the right to
make changes at any time to the technology and/or configuration without announcement. IBEKO Power AB is not
to be held liable for statements and declarations given in this Manual. The user is responsible for every application
described in this Manual and its results.
IBEKO Power AB explicitly exonerates itself from all liability for mistakes in this manual.
IBEKO Power AB translates this Manual from its source language English into a number of other languages. Any
translation of this Manual is done for local requirements, and in the event of a dispute between the English and any
non-English versions, the English version of this Manual shall govern.

3
RMO100G Introduction, Safety Instructions
1 Introduction
This Manual contains helpful instructions on how to use RMO100G in a safe, proper and efficient way.
Following these instructions can help you to avoid dangerous situations, repair costs and other miss
happenings due to incorrect operation. Furthermore it ensures the reliability and life cycle of your
RMO100G.
RMO100G must be used in observance of all existing safety requirements/ regulations from
national/local standards for accident prevention and environmental protection.
Reading the RMO100G Manual alone does not release the user from the duty of complying with all
national and international safety regulations relevant for working with RMO100G.
2 Safety Instructions
Before operating RMO100G, please carefully read the following safety instructions.
It is not recommended that the RMO100G will be used (or even turned on) without the understanding of
this Manual.
RMO100G should only be operated by trained and authorized personnel.
Rules for Use
• RMO100G should only be used when in a technically fit condition. Its use should be in accordance
with the safety regulations for the actual working site and application. Always be aware of the dangers
of high voltages and currents associated with this equipment and its environment. Pay attention to the
information provided in the operations Manual.
• RMO100G is intended exclusively for the application areas specified in ”Designated Use”. The
manufacturer and distributors are not liable for damage resulting from unintended usage. The user
alone assumes all responsibility and risk.
• The instructions provided in this Manual are considered part of the rules governing proper usage.
• Do not open RMO100G. All service and maintenance work must be performed by qualified personnel.
Orderly Practices and Procedures
• The Manual should always be available on the site where the RMO100G is used.
• Before using RMO100G, all personnel (even personnel who only occasionally, or less frequent, work
with RMO100G) assigned to RMO100G should read the operations Manual.
• Do not undertake any modifications, extensions, or adaptations to the RMO100G.
• Use RMO100G in conjunction with original accessories only.
• Use both RMO100G and its original accessories for its designated use only.
Cleaning
To clean RMO100G, use a cloth dampened with isopropanol alcohol or water.
Safe Operation Procedures
• Hazardous voltages of up to 400 V can occur inside RMO100G. Therefore is not permitted to open
RMO100G.
• Do not insert objects (e.g., screwdrivers, etc.) into the ventilation slots.
• Before putting RMO100G into operation, check the test set for visible damages.
• Do not operate RMO100G under wet or moist conditions (condensation).
• Do not operate RMO100G when explosive gas or vapors are present.
• The serial interface of RMO100G should only have external devices connected that meet the
requirements for SELV equipment according to EN 60950 or IEC 60950.
• When setting up RMO100G, make sure that the air slots of the test set remain unobstructed.
• If RMO100G is opened by the customer, all guarantees are invalidated.
• If RMO100G seems to be functioning improperly, please contact the IBEKO Power AB (refer to
section ”Manufacturer Contact Information”) after first checking the section Error Messages.

4
RMO100G Functionality
• Do not use RMO100G without the extra protective ground (PE) cable set connected. Always establish
this connection as the first one before you do any other connections, and separate this connection as
the very last one.
Operator Qualifications
• Testing with RMO100G should only be carried out by authorized and qualified personnel.
• Personnel receiving training, instruction, direction or education on the RMO100G should remain under
the constant supervision of an experienced operator while working with the test set and the test object.
Power Supply
•Supply RMO100G only from a power outlet that is equipped with protective ground.
• Instead of supplying RMO100G from phase –neutral (L1-N, A-N), it may also be supplied from phase
–phase (e.g., L1-L2; A-B). However, the voltage must not exceed 240 V AC, please refer to section
Technical Data.
Warning
This is a class A product. In a domestic environment this product may cause radio interference in which
case the user may be required to take adequate measures.
3 Designated Use
The Micro OhmMeter RMO100G is designed for measuring contact resistances of non-inductive test
objects used in the electric power industry or similar branches. It is employed for resistance
measurement during manufacturing, commissioning and testing of:
power circuit breakers,
interrupters,
bar installation,
cable splices,
welded joints,
grounding.
Any other use of the RMO100G than the ones mentioned above is to be considered improper and will
not only invalidate all customer warranty claims but also exempt the manufacturer from its liability for
repair or exchange.
4 Functionality
4.1 Single Test
The RMO100G generates a filtered (true) DC current and outputs it in an automatically regulated current
ramp. The current increases with a constant slope from zero up to a set maximum value. When the
current has reached its maximum, RMO100G measures the resistance of the test object. After test the
output current ramps back down to zero with a constant slope. By sloping the current up and down,
magnetic transients are virtually eliminated.
4.2 Continuous Test
RMO100G can generate DC current continuously using the Contin menu. In this menu the current can
be chosen the same way like in the Single menu, but the duration of the test can be preset. The test is
started pressing the START button. By pushing Ωbutton current test result is stored in internal memory.
During the test, a new result is shown on the display and stored into the PC (DV-Win) approximately
each second. Using DV-Win the result can be printed like an Excel table which later can be shown as a
diagram and used for a report.
Test is completed when the test time previously set in the menu has elapsed, or when the STOP button is
pressed.

5
RMO100G DIntrduction
By pushing STOP button test could be performed at any time. In case of test interruption by pushing the
STOP button, the last measured result will remain saved in the internal memory.
Upon expiry of the selected test lasting time, the last result remains saved at selected memory location.
Note 1: Choose test current so that for the expected resistance you have maximum value of it.
Note 2: Using DV-Win enables starting and controlling RMO100G from the PC. The results could
be stored to PC. Using DV-Win after testings enables result transfer from the internal
RMO100G memory to PC.
Note 3: At the start of the test (Single, Continuous and CC), a check of cables connection is done.
In case of disconnection, or erroneous polarity, an alarm is activated, and the error
message is shown on the display.
Voltage sense cables disconnection, occured during the test, will cause an erroreous
result. The display will not show this as an error message.
During tests the high continued DC current will heat up the test set. To prevent RMO100G
from overheating, duty cycles apply. The duty cycles depend on the used test current,
please refer to section "Duty Cycles".

6
RMO100G Description
5 Description
5.1 Front Panel Components
5.2 Mains power and ground connectors
Display
UP/DOWN buttons to select
a menu, define a test current
and set test parameters
RIGHT button to navigate
in the active menu
ENTER button to confirm the
defined test parameters,
Language, and Date and Time
green LED
• Lights continuously when RMO100G is turned on.
• Flashes when a test can be started.
• Flashes alternately with the red LED during a test.
red LED
• Lights continuously in case of operational error.
• Flashes alternately with the green LED during a test.
• Lights when assigned maximum value in Rmax menu
is exceeded (or equaled)
Connector for
mains power supply
Power switch
I In this position, RMO100G is connected to the
mains power supply.
0 In this position, RMO100G is separated from
the mains power supply with both poles.
Earth/ground connector
For protection against parasitic currents or
voltages, always connect RMO100G
earth/ground connector to protective ground
(PE). Use only the original cable.
For safety reasons, always establish this
connection as the first one before you do
any other connections, and separate this
connection as the very last one.
STOP button to stop a test, to
acknowledge the alarm buzzer
and return to the current menu
SET button to scroll
between the menus
START button to start the
test current
Ωbutton to save the current
resistance value in Contin
menu

7
RMO100G Description
5.3 Settings
To set RMO100G‟s language, date and time and Rmax press and hold SET button for 3 seconds to
select Settings menu.
Pressing STOP to cancel, returns you to the Single menu.
Setting RMO100G’s Language
To set RMO100G‟s language, use the RIGHT button, and then ENTER button to select the Set Language
menu.
Move the cursor using the RIGHT button and select the language of your choice.
Pressing ENTER to confirm, returns you to the Settings menu.
Pressing STOP to cancel, returns you to the Settings menu.
Setting RMO100G’s Date and Time
To set RMO100G‟s date and time, use the RIGHT button, and then ENTER button to select the Set date
and time menu.
Move the cursor to the position of your choice using the RIGHT button, and change the value with the
UP/DOWN buttons.
Pressing ENTER to confirm, returns you to the Settings menu.
Pressing STOP to cancel, returns you to the Settings menu.
Setting Rmax
To set RMO100G‟s Rmax value, use the RIGHT button, and then ENTER button to select the Set Rmax
menu.
In the Rmax menu, define the status of Rmax (On or Off) and assigned value of resistance.
Figure 5-2:
The Language menu
Figure 5-3:
The Date and Time menu
showing RMO100G‟s internal
date and time
Figure 5-1:
The Settings menu
Figure 5-4:
The Rmax menu

8
RMO100G Description
Using RIGHT button move cursor to the position of status of Rmax menu, and using UP/DOWN buttons
select is it Off (figure 5-4) or On.
Using button RIGHT move cursor to the position of assigned value of resistance, and using UP/DOWN
buttons select desired value between 1 µΩ and 9999 µΩ. First, initial value is 1000 µΩ (figure 5-4). When
device is turned off and then turned on, RMO100G remembers last saved setting of Rmax value and
status.
Once these parameters are defined, press ENTER to change to the Settings menu.

9
RMO100G Getting Started
6 Getting Started
6.1 Connecting a Test Object to RMO100G
Before you connect a test object to RMO100G, make sure that:
• the test object is disconnected or separated from its circuit in accordance with the national safety
regulations,
• the test object is properly grounded to protective earth (PE),
• RMO100G itself is properly grounded. To do so, connect the grounding screw on the back of
RMO100G‟s to PE using a grounding cable.
To maximize accuracy and measurement repeatability; make sure that all clamps have a good
connection to the test object and avoid any connection between Sense and Current clamps.
On/Off
Connect the earth/ground lead first before doing any connections to the test object.
Connect the mains lead to a mains outlet 100 V –240 V AC and turn on RMO100G with the power
switch on the test set. The first shown on the display is the name of the product followed by the
instrument model type and the internal firmware version.
6.2 Setting the Measurement Parameters
Single Test
Turn on RMO100G with the power switch on the test set. The display shows the Single menu and the
green LED lights up.
Before a test can be started, the following needs to be defined in the Single menu:
Test current; the following values can be chosen:
5 A, 10 A, 20 A, 30 A, 40 A, 50 A, 60 A, 80 A and 100 A.
Memory position, 000-499
Figure 6-1:
Connecting a test
object to RMO100G
Figure 6-2:
The Single
menu
Test current
Memory position
Time
Menu name
Date
With RMO100G turned off, connect
RMO100G to the test object (RX) in
such a way that the measuring cables
from the "Voltage Sense" sockets are
attached as close as possible to RX,
and in between the current feeding
cables. That way, resistance of both
cables and clamps is almost
completely excluded from the
resistance measurement.
Pay attention to polarity while
connecting measuring cables.
Measuring results will be incorrect
as a consequence of error.

10
RMO100G Getting started
In the Single menu, define a test current for the test (here 200A). To do so set the value of your choice
by means of the UP/DOWN buttons.
Using button RIGHT move the cursor to the memory location position, and using UP/DOWN select desired
memory position to which obtained results would be saved. Once the test is completed the last
measured result will remain registered in RMO100G, and the memory position is automatically switched
over to the next memory position. The result can be recalled later by selecting that particular position
number.
Continuous Test
Turn on RMO100G with the power switch on the test set. The display shows the Single menu. Go to
Contin menu using SET button or four times RIGHT button and then UP button. Press STOP to return to
Single menu.
In the Contin menu, define a test current, memory location and test current duration time.
Using RIGHT button move cursor to the position of test current, and using UP/DOWN buttons select
desired value. Maximum duration of the current depends on its value, please refer tu section “Duty
Cycles”.
Using RIGHT button move cursor to the position of test current duration (here 60 sec), and using
UP/DOWN buttons select desired value.
Using button RIGHT move cursor to the position of memory location, and using UP/DOWN select desired
memory position (here Memory: 020) to which obtained results will be saved. Upon performed test (either
due to time expire or due to push to the STOP button) the last measured result will remain registered in
RMO100G.
Note: In case of PC and DV-Win software use during the test, all performed measurements will be
registered. Results will be shown in a table in Excel format with option of additional edit and graphic
presentation.
Using DV-Win after testing for transfer of results from selected internal memory location to PC,
it is possible to transfer only the result of the last test.
Figure 6-3:
The Contin
menu

11
RMO100G Getting started
6.3 Measuring with RMO100G
Single Test
Before a test can be started, both test current and memory position need to be defined using the Single
menu. Once these parameters are defined, press ENTER to change to the Ready state.
The Ready state displays the test current and memory position defined. If one of these values has to be
changed, press STOP to return to the Single menu.
The flashing green LED indicates that RMO100G is now ready to start the test. Press the START
button to run a test. At the start of the test, a cable connection check is done. In case of e.g. a
disconnection, an alarm is activated and the error message is shown on the display.
During the test, both the green and the red LEDs flash alternately. The display shows a graphical
representation of the output current that ramps from 0 A to the defined maximum value (here
200A).
Once the current ramp reaches its maximum value, RMO100G measures the current through the test
object and the voltage at the test object for 1s, calculates the resistance from these values, and saves
the data at the present memory position.
Afterwards, RMO100G ramps down the output current from the max. value to 0 A.
When 0 A is reached, the test is finished and the green LED lights up.
Note: To stop the test prematurely, press the STOP button at any time during the test. The
current will immediately drop to 0 A.
Continuous Test
Before a test could be started, test current, its duration and memory location must be defined using
Contin menu. Press ENTER to change to the Ready state.
The Ready state displays selected test current (here 100A), its duration (here 60 sec) and memory
location of the result (here Memory: 020). If one of these values has to be changed, press STOP button to
return to the Contin menu.
The flashing green LED indicates that RMO100G is now ready to start the test. Press the START
button to run a test.
Figure 6-4:
The Ready state
before the test
Figure 6-5:
The Single
menu during
the test
Figure 6-6:
The Ready state
before the test

12
RMO100G Getting started
During the test, both green and red LEDs flash alternately. The display shows test curent
(here 100A) and the current value of the measured resistance (94,2µΩ). The time passed since
the test begining is also shown on the display (00:35).
Upon completed test (due to expire of selected time or due to push to the STOP button) at selected
memory location the last measured result will remain registered. By pushing Ωbutton current test result
is stored in internal memory.
Note: In case of PC and DV-Win software use during the test, all performed measurements will be
registered. Results will be shown in a table in Excel format with option of additional edit and
graphic presentation.
Using DV-Win after testing for transfer of results from selected internal memory location to PC, it is
possible to transfer only the result of the last test.
To stop the test prematurely, press the STOP button at any time during the test. The current will
immediately drop to 0 A.
6.4 Connecting of current clamp meter and measuring with both sides grounded unit
Measurement procedure
Turn on RMO100G with the power switch on the test set. The display shows the Single menu. Go to CC
menu by pushing SET button twice or using RIGHT button four times, DOWN button, RIGHT button three
times and then DOWN button.
Figure 6-7:
The Contin menu
during the test
Using RMO100G with current clamp meter it is
possible to make safer measurement of breakers
with both sides of the breaker grounded.
Measuring the current through the ground
connection and reducing this value from the total
current is an additional safety feature.
When connecting current clamp meter pay
attention that current circuit of the current clamp
meter is enough far away form the rest of current
circuits. In that way electromagnetic interference is
prevented. Distance between current cables must
be more than 10 cm.
Figure 6-8:
The CC menu

13
RMO100G Getting started
Define a test current through the circuit breaker (here 200A) and memory position (here Memory: 012).
Once these parameters are defined, press ENTER to change to the Ready state.
Press the START button to run a test. Upon completed test at selected memory location the measured
result will remain registered. It is the current through circuit breaker (difference between total test current
and current through current clamp meter), contact resistance of circuit breaker and the time when test is
performed. When defined test current could not be reached, RMO100G displays maximum possible
reached current.
The accuracy of measured resistance in this menu is lower then accuracy in Single or Contin menu due
to accuracy of current clamp meter.
Connecting of current clamp meter
Connect cables of the current clamp meter to the appropriate input terminals of device. By pressing the
side button open the current clamp meters jaws and clamp one conductor only. The jaw must be firmly
closed around the conductor. Make sure that conductor is passed through middle of the hole of current
clamp meter. Make sure that the angle is 90 degrees between central axis of conductor and plane of
hole of current clamp meter. The red LED light continuously indicates that current clamp meter works
correctly. In case that red LED is blinking it is necessary to change the battery. Select current range of
1000A. The current clamp meter is ready to use.
6.5 Measurement parameters
Accuracy given in the table is valid if the maximum possible current is used.
Range
Recommended
Test Current
Nominal
Resistance
Full Range
Display
Resolution
Typical accuracy
1
100 A
1 mΩ
999,9 µΩ
0,1 µΩ
± 0,1 % rdg ± 0,1 % FS
2
100 A
10 mΩ
9999 µΩ
1 µΩ
± 0,1 % rdg ± 0,1 % FS
3
50 A - 100 A
50 mΩ
50,00 mΩ
10 µΩ
± 0,1 % rdg ± 0,1 % FS
4
20 A - 50 A
100 mΩ
99,99 mΩ
10 µΩ
± 0,1 % rdg ± 0,1 % FS
5
10 A - 20 A
250 mΩ
250,0 mΩ
0,1 mΩ
± 0,1 % rdg ± 0,1 % FS
6
5 A - 10 A
500 mΩ
500,0 mΩ
0,1 mΩ
± 0,1 % rdg ± 0,1 % FS
7
5 A
1 Ω
999,9 mΩ
0,1 mΩ
± 0,1 % rdg ± 0,1 % FS
6.6 Viewing the Test Results
Once a Single or CC test is finished, RMO100G automatically changes to the Result menu to display the
test results.
For Continuous Test only the last performed test is shown.
Note: If the defined test current could not be reached, this could be due to a too high contact
resistance of the test object and/or of the current cables.
The test current value displayed here is the maximum test current reached.
The Result menu is displayed for 12 seconds and automatically goes back to the start menu.
Figure 6-9:
The Ready state

14
RMO100G Getting started
Now there are three choices:
Starting a new test with the same current value:
–press the ENTER button to change to the Ready state with same test conditions,
–press the START button to run a test.
The current value remains the same as in the previous test, the memory position
increases by one.
Starting a new test with a different current value:
–press the STOP button to change to the starting menu (Single, Contin or CC),
–set a new current value and/or another memory position,
–confirm your entries by pressing the ENTER button,
–start the test by pressing the START button.
If the Rmax menu is set to option On, once a Single or CC test is finished, RMO100G automatically
changes to the Rmax to display the test results in case the measured resistance is equal or greater than
maximum assigned value.
Figure 6-10:
The Result menu
showing the test results
obtain in Single test
Max. test current reached
Memory position that
holds the results
Voltage drop on the
test object
Measured resistance of test object
Figure 6-13:
The Rmax
showing the test
results
Figure 6-11:
The Result menu
showing the test results
obtain in Continuous
test
Measured resistance of test object
Test duration
Memory position that
holds the results
Voltage drop on the
test object
Max. test current reached
Figure 6-12:
The Result menu
showing the test results
obtain in CC test
Measured resistance of test object
Memory position that
holds the results
Voltage drop on the
test object
Max. test current reached

15
RMO100G Getting started
For Continuous Test, first time when the measured resistance is equal or greater than maximum
assigned value, RMO100G automatically stops the test and changes to the Rmax to display the last
measured resistance equal or greater than maximum assigned value and time of obtaining that.
The red LED lights continuously and the alarm buzzer is activated indicating that assigned
maximum value in Rmax menu is exceeded (or equaled).
6.7 Viewing Results of Previous Tests
RMO100G stores up to 500 test results. They can be viewed using the Memory menu at memory
positions 000 ... 499.
Selecting a memory position on the Memory menu displays:
• the memory position of these results,
• the test object‟s measured resistance,
• the time of test (for continuous test),
• the current fed into the test object,
• the date and time,
of this particular test.
Figure 6-14:
The Memory menu
showing the previously
saved test results of
memory, position 012 for
Single or CC test and 020
for Continuous test

16
RMO100G Getting started
6.8 Deleting Results of Previous Tests
In the Memory menu, press ENTER.
Press ENTER once more to delete all saved measurements from the memory positions.
Press STOP to leave the Memory menu without deleting any measurements.
6.9 Duty Cycles
During tests, RMO100G generates a high DC current that heats up the test set. To prevent RMO100G
from overheating, certain duty cycles apply depending on the used test current.
S i n g l e T e s t
Test current
(A)
Cooling time between
first 3 tests (sec)
Cooling time after
4 tests (sec)
5, 10, 20, 30,
40, 50, 60, 80,
100
0
0
C o n t i n u o u s T e s t
Test current
(A)
Maximal test duration
time (sec)
Cooling time
(sec)
5, 10, 20, 30,
40, 50, 60, 80,
100
300
0
A built-in control prevents these cooling times from being skipped. If you try to start a test within the
cooling period, the display shows "Wait" and a timer counting down. After the cooling period has
elapsed, start the test using the set test parameters by pressing the START button. Cooling of RMO100G
is supported by a built-in fan that is automatically activated every time a test is started from the Ready
state. It continues running 5 minutes after the test is finished.
Table 6-16:
Cooling time
between
single
tests
Figure 6-15: The Memory
menu showing an option to
delete all saved
measurements from the
memory positions
Table 6-17:
Cooling time
between
continuous
tests

17
RMO100G DV-Win software
7 DV-Win Software
DV-Win is a Windows program for working with Micro-Ohmmeters RMO series. It enables the two-
way communication RMO –PC over USB port. Microsoft Office Excel program must be installed on
the PC.
DV-Win supports the following functions:
-Controlling and starting RMO when the tests are performed from the PC, the results could be
stored to PC; results reading interval is adjustable,
-The transfer of the test parameters from the local RMO memory to the PC with the possibility of
writing the notes on objects being measured and appropriate comments.
Note: Using DV-Win software, a device RMO device must be operated only from the DV-Win.
The transferred data from RMO is possible to:
-Display in the form of tables,
-Download as an Excel file.
Every test reading parameters contain:
-The date and the time of the test,
-The real test-current,
-The voltage on the voltage terminals (Voltage Sense),
-The measured resistance value,
-The memory location,
-The name of the object (tested device) and the useful comments.
7.1 The minimum system requirements
Processor : Recommended > 500 MHz
Memory : min 32 Mb
Operating system : Windows XP, Windows Vista, Windows 7
7.2 DV-Win installation
To install the DV-Win software do the following:
-Put the DV-Win installation CD in the CD-ROM drive,
-Click on ”Start”,
-Click on ”Run”,
-Click on ”Browse”,
-Select the CD-ROM drive,
-Highlight the ”DV-Win.EXE”,
-Click on ”Open”,
-Click on ”OK”,
-Follow the instructions displayed on the screen,
-When the installation process has been finished - exit the program.

18
RMO100G Getting started
7.3 Starting DV-Win
Connect the USB port of the RMO Micro OhmMeter and the PC, with a USB cable.
Turn RMO on.
Start DV-Win:
-Click on ”Start”,
-Click on ”Programs”,
-Click on ''DV-Win‟‟,
-Click on „‟DV-Win‟‟,
or duble click at icon on the desktop.
The look of the DV-Win main menu is shown in the following illustration.
Now the RMO device can be controlled from the PC. The test mode is started by pressing icon
“Start new test”.

19
RMO100G Getting started
DVWin-RMO interface consist of main menu, three tabs (Test info, Test settings, Download), status bar,
toolbar and a table used for displaying results.
7.4 Test info
Test info tab contains fields with information about circuit breaker under test, operator, and environment
conditions. I you are using the instrument for the first time, all fields will be blank and you will need to
enter these information. Once you save the measurement results these information are also saved. Test
info tab will be automatically populated when measurement results from .dwo (internal DV-Win file
format) file are loaded. Clear All button on this form will instantly clear all data written in test info fields.
Note: Test info fields don't need to be filled in order to do the testing with RMO devices.
7.5 Test settings
The test settings tab contains test parameters and it is used to start new test or to stop test in progress.
This section briefly describes test parameters functions.
Operation mode:
Single - selects Single operation mode. Test is performed for fixed period of time. User can only
select desired test current and memory position for test.
Continuous - selects Contin operation mode. Test is performed for up to 300 seconds. User can
select actual test duration, test current, memory position and interval for this test. Omega button
is available and visible only in this mode after the test is started.
CC - selects CC (Current Clamp) operation mode. This test allows using Current Clamps for
testing.
Test Settings:
Test curent - this field is used to set the test current. Test current is limited by RMO technical
capabilities. Check your RMO manual for further information.
Test duration - this field sets the duration of test in seconds. Test duration can be set in
Continuous operation mode only. Single and CC operation modes are performed for fixed
amount of time.
Memory position - determines the memory location where the results of performed test are
saved. Memory position counter is increased automatically after each test. Memory position can
also be set manually by user

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RMO100G Getting started
Interval - Interval field allows user to record test results in specific time intervals set in seconds.
This field is unlocked only for Continuous mode of operation. Default interval setting denotes that
measurement will be recorded only once when the test is completed.
OMEGA - This button performs function of the omega button on RMO instruments, ie. it records
last measurement on click. Omega button is available and visible only in Continuous mode of
operation.
Use standard parameters - If checked, this checkbox allows user to use standard fixed discrete
test parameters previously used in older DV-Win software for RMO devices. If unchecked, user
can manually enter desired test values for Test current and Test duration fields. DV-Win RMO is
designed to automatically set safe test parameters, if user unintentionally inputs non-allowed test
parameter values, so no harm can be done to the RMO device.
7.6 Download
The download tab allows user to transfer recorded measurements from RMO Device to personal
computer.
Download is initiated by pressing Start button and it can be stopped at any time by pressing Stop button.
During data transfer progress bar will indicate transfer progress. Measurements can be selectively
downloaded by specifying date, date range, memory positions, current range or by specifying test mode.
7.7 Rmax Settings
Rmax settings are available via Tools - Rmax Settings menu. Rmax function of RMO devices is used to
detect when specific circuit breaker resistance value is reached during measurement. If Rmax value is
detected, RMO device will automatically stop performed test. This function is unchecked by default
settings.