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