Phenix Technologies MRM-100-V2 User manual

MRM-100-V2
Digital micro-ohmmeter
User’s guide
GF-XXXX
© 2020 PHENIX TECHNOLOGIES. All rights reserved.
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
Safety Precautions
efore to use this instrument the User Guide and Safety warnings must be
read and understood.
Safety procedures and rules for working near high voltage energized systems
must be observed during the use of this equipment. The generated voltages
and currents may be dangerous.
efore you begin the measurement verify the mains supply voltage
compatibility.
The micro-ohmmeter must be connected to earth point, through the green
terminal or the power cord (both use the same point).
During a circuit breaker measurement its contacts must be closed and
connected to an earth point. The end connected to an earth point must be
connected to the “C-” terminal.
Certified the measurement points in which will be connected all the terminals
are free of any voltage in relation to earth point and between each other.
Take in account that in a substation you will find in disconnected points high
potential levels in relation to the earth point. Those potentials are caused by
present electromagnetic fields and can be minimized following the indications
in the paragraph before.
Make sure that the current connections are well connected as well as the
C-clamp, to avoid undesirable heating.
e careful when manipulating the current terminals in the instrument. You
may get high temperatures in the current connections.
Never connect or disconnect the cables during a measurement. If you must
modify any connection, it must be made after you have pressed the Stop
button.
The equipment must be kept dry and clean.
Never use the equipment if you suspect regarding its functionality. The
equipment must to be put out of service (contact your distributor service
department).
This equip ent should be used only by a trained and co petent
person, strictly applying suitable safety rules.
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Used sy bols
Caution, refer to User Guide.
Printer.
US (Universal Serial us).
30 V max. (to ground): indicates the maximum potential allowed
in the terminals during resistance measurements.
Warning, hot surface. e careful when handling.
Equipment complies with current EU Directives.
Double insulation: symbol indicates that the equipment is
classified as Class II (double isolated).
The rubbish bin with a line through it means that in the European
Union, the product must undergo selective disposal for the
recycling of electric and electronic material, in compliance with
Directive WEEE 2002/96/EC.
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Index
1. Description.............................................................................................................7
1.1. Operating principle..........................................................................................8
1.2.  Use of test probes......................................................................................8
2. Control panel..........................................................................................................9
4. Settings and Adjustments....................................................................................12
5. Measurement.......................................................................................................14
5.1. Manual mode................................................................................................17
5.2. Auto mode.....................................................................................................17
5.3. oth Side Ground ( SG)..............................................................................18
7. Printer...................................................................................................................19
8. Internal memory...................................................................................................19
9. Software...............................................................................................................20
9.1. PXLogger Software.......................................................................................20
10. Remote control...................................................................................................21
11.  Replacement fuse........................................................................................22
12. Cleaning.............................................................................................................22
13. Technical specifications.....................................................................................23
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1. Description
The MRM-100-V2 high-current micro-ohmmeter is a portable, digital
instrument. It has optimized filters and protections for measurements in
electrical substations. Can be used to accurately measure very low
contact resistances of high voltage circuit-breakers and switches,
busbars, etc., with test currents up to 100A. It employs the 4 terminals-
method (U/I measuring principle) to avoid errors caused by test leads and
their contact resistances.
Measurement accuracy is guaranteed by a state-of-the-arts signal
amplification system, offset-free and of high long-term stability.
Resistances readings are shown in the alphanumeric display with up to
4½ digits-resolution. It allows to measure resistances up to 300 mΩ, and
the best resolution is 0.1 µΩ.
It has an internal memory for up to 4000 measurements divided into
multiple records. The data output (US ) may be connected to a computer
to download the stored values.
This equipment incorporates an open Mod us protocol and can be
controlled remotely through an Android application or via US by
customized software, labview and PLC
The high-current generation system is based on modern technology that
allows to significantly decrease both its weight (approx. 11kg) and size.
The cabinet is made of plastic material highly resistant to impacts and to
environmental challenges. Internal thermal sensors in all sensitive
components avoid any damage caused to the instrument due to
overheating.
This is strong but lightweight equipment, and may be easily carried by
one person. It is water-resistant and can be used under severe weather
conditions (IP54 with closed lid) offering an excellent performance
working both in the laboratory and out in the field.
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1.1. Operating principle
This device uses the Kelvin ridge architecture, with four terminals,
avoiding testing leads resistance to cause error during measurement. The
operator may choose test current and the reading is obtained by
comparison through internal high-stability standards. The result appears
in the alphanumeric display that is very easy to read.
1.2.  Use of test probes
WARNING
Only use the test leads supplied with the equip ent, for
easure ent and calibration procedure.
Make sure that the current connections are well connected as
well as the C-clamps, to avoid undesirable heating.
Attention when manipulating the current terminals of the
instrument. You may get high temperatures in the current
connections.
Make sure that the cables are straight during the measurement
to avoid overheating.
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2. Control panel
 Display.
 Current terminal (C+).
 Potential terminal (P+).
 Potential terminal (P-).
 Current terminal (C-).
 Ground.
 Auxiliary current clamp connector.
 Fuse.
 Power cord connector.
 Printer.
Keyboard.
 US connector.
 Test current control.
 On/Off switch.
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3. Display
Alphanumeric LCD display where the measurement result, the
corresponding measuring unit, the elapsed time since the measurement
started and messages to the operator are displayed.
NUMBER ONE
MODE:NORMAL 01:15
I= 55A
02/01/20 16:18
Object test name
Mode selected
Date Time
Timer
Selected current
Built-in chrono eter
It features the elapsed time (in minutes and seconds) since test current is
applied.
Real ti e clock
It has a real time clock with date, hours and minutes indication, to make
identification of tests recorded in paper or in memory easier.
Test nu ber
Tests are automatically numbered by the equipment to make their
identification easier. The test number is printed at the beginning of each
test and it is stored in memory.
Model and serial nu ber
At the beginning of each test, the equipment model, as well its serial
number, are registered, making it possible to relate the obtained results
with their respective equipment Calibration Certificate.
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3.1. Display essages
PHENIX
MRM-100-V2
MICRO-OHMMETER
v.2.0.0
When turning the equipment on using the
On/Off switch, this introduction message
appears for a while.
The equipment is carrying out some
functional verifications.
NO NAME
MODE:NORMAL 01:15
I= 55A
02/01/20 16:18
Main screen where a test can be started,
or set a new one.
LOW CURRENT
I=0.0A
01:15
Indicates that the test current is not
enough to carry out the reading.
OVERRAN E
I=0.0A
01:15
Indicates that the measured resistance is
higher than the maximum value readable.
OVERHEATIN
Indicates that some part of the equipment
has achieved the critical temperature.
Thus the system will cut the high current
generation.
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4. Settings and Adjust ents
This equipment has a MENU for settings and
adjustments. To access the MENU, press the
Selector / Adjust ( ), or press button.
All navigation is performed through the and all panel keys are
disabled, with the exception of the key that has the function to cancel
and return to the initial screen.
Open MENU
Short press: Open MENU, open selected sub-menu /
confirm settings.
Change selection / values
Cancel
Cancel and close the MENU
ATTENTION: The configuration MENU can not be accessed during the tests.
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MENU SUBMENU DESCRIPTION
SETUP TEST
EDIT OBJECT NAME Allows write t e name of t e object under test, using
t e alp anumeric keyboard.
TEST MODE Allows to select t e test mode: MANUAL or
AUTOMATIC.
TEST CURRENT Allows to select t e test current for Automatic Mode.
TEST DURATION Allows to setup t e test duration between Unlimited
(t ere is not any pre-selected test duration) and
Limited (minimum of 15 seconds and maximum of 2
minutes).
BOTH SIDE GROUNDED Turn on and off t e BSG test.
LANGUAGE Allows you to c ange t e interface language
between: Englis and Spanis .
MEMORY
USAGE Displays t e percentage of internal memory used.
DELETE Deletes all records from memory.
SETTINGS
DATE FORMAT Selecting t e date format.
TIME FORMAT Selecting t e time format.
SET DATE Setting t e date.
SET TIME Setting t e time.
AUTO SAVE Save t e last measured value in t e internal memory
w en t e test is finis ed.
DISPLAY Setting t e display.
SYSTEM INFO Displays t e firmware version and serial number.
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5. Measure ent
• The User Manual and its respective safety precautions must be read
and understood before using the micro-ohmmeter.
• The usual safety precautions and safety regulations must be strictly
observed.
• It should be checked that the item to be measured is voltage free.
• To ensure safety, use only the accessories supplied by the
manufacturer.
1. efore turning the equipment On, connect the test leads to the item to
be measured and to the front panel terminals.
Simple measurement
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Measure ent with potential risk
Ex .: High voltage circuit breaker under external influence of electromagnetic fields
from nearby energized devices.
The safety ground terminal must be connected before making the
other connections to the equipment.
2. Turn on the device with the On / Off key ( ).
3. The display of the equipment will show the presentation
message MRM-100-V2.
4. The AUTO VERIFICATION message will appear next and then
PRESS START.
5. Access the device's MENU using the or button.
6. Select SETUP TEST.
7. To change the object’s name, select EDIT O JECT NAME and
write using the equipment keyboard (press to confirm).
8. Select TEST MODE to chose between MANUAL or AUTO
(explained below)
9. When the current value is equal to or greater than 5 A, the
display will indicate the measured resistance.
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10. Upon completion of this process the display will indicate the
measured resistance value, the elapsed time, the test current
and (on SG mode) the ground current.
Display on AUTO or MANUAL mode
Display on SG mode
11. The unit of measured resistance shall be expressed in Ω (ohms),
mΩ (mili-ohms) or µΩ (micro-ohms).
12. This information can be saved in the internal memory during and
/ or after the test simply by pressing the save key .
13. To finish the test press the red stop key . Do not turn off the
product with the power switch without pressing the stop
button .
14. Finally, after all measurements have been completed, switch the
device off using the on / off switch .
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Caution: Never connect or disconnect the test leads with the e uipment
performing tests. If you have to make any changes to the connection, it
must be done with the e uipment in stand-by (not generating current) or
turned off.
5.1. Manual ode
In anual ode, the operator selects and adjusts the current value
during the test, using the .
1. Access the device's MENU pressing the or button.
2. Use the to select SETUP TEST, and pressing the to
confirm.
3. Use the to select TEST MODE, and pressing the to
confirm.
4. Use the to select MANUA , and pressing the to confirm.
5. Exit the menu and start the test.
6. During the test, select the current using the .
5.2. Auto ode
In auto ode, the operator preselects the current value before the test
(the pre-selected value cannot be changed during the test)
1. Access the device's MENU using the or button.
2. Use the to select SETUP TEST, and pressing the to
confirm.
3. Use the to select TEST MODE, and pressing the to
confirm.
4. Use the to select AUTO, and pressing the to confirm.
5. Choose the test current value, between 50 A to 100 A (using the
or the keyboard).
6. Exit the menu and start the test.
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5.3. Both Side Ground (BSG)
The SG ( oth Side Grounded)
test mode provides to the user
and to the equipment a safer way
to test objects in a substation
since the both sides of a switch,
contact or circuit breaker is
maintained connected to the
ground during the whole test.
ATTENTION: To perform this procedure, place the auxiliary current clamp
on the ground of the test object before turning on the equipment
1. Access the device's MENU using the or button.
2. Use the to select SETUP TEST, and pressing the to
confirm.
3. Use the to select BOTH SIDE GROUNDED, and pressing
the to confirm.
4. Use the to select ON, and pressing the to confirm.
5. Exit the menu and start the test.
6. Protections
The MRM-100-V2 continuous use time is limited by thermal
considerations. Some internal sensors measure the temperature of the
sensitive parts and trigger the protection that will cut the current
circulation, if any of them exceeds the limit temperature, thus avoiding
any damage. The OVERHEATING message will appear in the display.
Under these conditions, measurements will be inhibited up to the
temperature decreases sufficiently.
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7. Printer
To print a result, press the key during a measurement.
ATTENTION: Don’t pull the paper. The printer can be easily damaged.
This printer uses 2.2” (57 mm) -wide thermal paper, which comes in a
1.18” (30 mm)-diameter reel.
Precautions
• Perform the procedures below with the equipment turned off.
• Disconnect the equipment from the mains supply and remove
the power cord.
• Disconnect the test leads.
Pull the lever located on the lid.
Insert the paper reel as shown in the figure.
Keep the tip of the paper out of the printer and close the lid.
8. Internal e ory
This device has internal memory for up to 4,000 measurement values.
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9. Software
To install the US drivers required for the communication between PC
and equipment follow the instructions:
Connect the equipment in the PC using the US cable.
If there is an available Internet connection, Windows will silently
connect to the Windows Update website and install any suitable
driver it finds for the device. If no suitable driver is automatically found
then you need to insert the CD-ROM, supplied with the equipment, in
the PC, run the executable “usb-install.exe” and click in “Install”.
9.1. PXLogger Software
This software makes communication between the equipment and a
computer with Windows operative system easier. It makes it possible to
synchronize the date and time of the equipment internal clock with the
computer date and clock, to transfer the stored date, to clear the memory,
to generate tests reports, etc.
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10. Re ote control
The Phenix Technologies equipment that have luetooth interface can be
controlled remotely via an Android device running PHENIX Remote
Control application.
Mini u require ents
- Android 4.4 KITKAT System or higher;
- luetooth Communication.
Pairing
To perform the pairing between equipment and Android device, follow the
procedure:
•To enable the luetooth, in screen “Applications”, tap "Settings" >
" luetooth" and drag the luetooth slider to the right.
•To pair your equipment, on screen "Applications", tap "Settings" >
" luetooth" > "Search". Select the equipment and wait for the end
of the pairing (If necessary, accept the automatically generated
password to confirm or enter the PIN 1234).
Since the equipment communicates through a highly defunded and open
protocol in the industry - Modbus - It is possible for any user to custom
their own remote control or automated test system.
All the setup, real-time control, measurement monitoring, as well the test
data recording recall may be made using Modbus over US or luetooth.
Consult our technical support to get the equipment's memory map and
instruction on how to do it.
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11.  Replace ent fuse
Precautions
• Perform the procedures below with the equipment turned off.
• Disconnect the equipment from the mains supply and remove
the power cord.
• Disconnect the test leads.
• Disconnect the equipment from the mains, unplugging the power cord.
• With a screwdriver, remove the fuse holder cover, lightly pressing the lid
and turning ¼ counter clockwise.
• Remove the blown fuse and insert a new fuse in the fuse holder cover.
• Place the cover in the compartment and with the screwdriver turn ¼
clockwise or until the fuse holder cover properly fits the fuse
compartment.
Fuse Schurter, odel SPT 5x20 (Ti e-lag) 10A/250V. High breaking capacity.
To replace the fuse, use only the fuse type specified in the
equipment.
12. Cleaning
Cleaning of this instrument should be carried out using a soft cleaning
liquid, after verifying that it doesn’t affect the plastic parts used in the case
and in the Control Panel of this equipment.
To avoid electrical shock, make sure that the equipment is
completely dry before Power it On.
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