Milli-ohmmeter MIKO-7M(A) new version

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Resistance measurement in inductive and non-inductive circuits in the range of 1 μΩ - 2 kΩ

Automatic setting and systematization of measurement results

High precision measurement modes

High level of protection and safety conformity

Non-volatile memory of up to 200 measurements

Data processing software

Variable instrument configuration

Two modifications of the instrument with different types of power

Milli-ohmmeter – easy-to-use, modern and convenient instrument

Video reviews of milli-ohmmeter MIKO-7M(A)

The MIKO-7M(A) milli-ohmmeter is developed to measure DC resistance in the range of 1 µΩ - 2 kΩ with test current up to 10 А for:

Windings of power and instrument transformers, windings of electric motors, generators, linear compensators and windings of other high-inductance equipment;
Contacts of circuit breakers, resistors, buses and other non-inductive circuits;
Compensatory, current limiting and other resistors of high-voltage circuit breakers;
Сables.

Watch detailed video-reviews about MIKO-7M(A) milli-ohmmeter up above ↑ or on the video page

The instrument integrates special-purpose modes for measuring 5 objects with account of their specific features: resistive and inductive objects; voltage transformers; current and power transformers. This functionality enables systematization of measurement results, as well as provides comfortable archive work.

MIKO-7M(A) automatically considers configuration of the object to adjust the measurement mode.

Depending on the object type, you can select special measurement modes. For example, for a resistive object:

AUTO: the measurement starts automatically by the circuit closing.
SINGLE: the measurement starts upon the user's command (by pressing the START button).

For an inductive object, the User can also select one of two modes:

MANUAL: start and stop of the measurement are conducted manually by pressing the START button.
AUTO: the measurement is initiated by pressing the START button and will be stopped automatically when the measured resistance value is stabilized.

The highest accuracy of measurement results under complex electromagnetic conditions is guaranteed by a patented automated measurement method for inductive objects.

MIKO-7M (A) has the safety certificate IEC 61010-1. The instrument also meets the requirements of electromagnetic compatibility that are applied to class A instruments according to IEC 61326-1.

The instrument has a high degree of protection against:

test cable or mains cable breakdown;
excess of test current;
EMF of self-induction;
overheat of the test block.

At disconnection of the test cable from transformer bushings or from the instrument as well as at disconnection of the mains cable from the mains in the course of measurement, EMF of self-induction of up to several kV is generated in the disconnected circuit and the electric arc appears in the break point.

MIKO-7М is characterized by the redundant protection against EMF of self-induction in case of involuntary disconnection of the test cable or power cable protecting users from electric shock and the instrument from being damaged.

MIKO-7M(A) has a built-in archive of up to 200 measurements for viewing, copying or deleting the data obtained. And due to the possibility of choosing an object at the measurement stage, the results are presented more systematically. This facilitates interaction with the archive.

The collected data can be:

Synchronized with a mobile app for smartphones/tablets via Bluetooth.
Presented for work and analysis in a cloud web service.
Uploaded to the local version of PC software via USB.

For more information on the types of software products, their differences, and advantages, please see the link → news

None of the test cables is included to the standard complete set of MIKO-7M(A) device. This allows the customer to choose exactly required cables.

For user's choice and convenience of connecting to the object, there are special test cables designed of different lengths and different types of clamps/fasteners:

10A Kelvin Clamp test cable 1 x 8.5 m (jaw up to 80 mm);
10A Kelvin C-clamp test cable 1 x 8.5 m (jaw up to 103 mm) for connection to transformer;
10A Kelvin Clamp test cable 1 x 4 m (jaw up to 25 mm) for resistance measurement of CT and VT windings;
10A Kelvin test cable 1 x 3 m (0.5 kg) with 2 probes and 4 crocodile clips (jaw up to 25 mm) (length: 70 mm, plug: 3 mm) for contact resistance measurement of CT and VT contact joints and windings.

Test cable SKB041.22.00.000 (on order)

Test cable SKB041.26.00.000 (on order)

Test cable SKB041.21.00.000 (on order)

Test cable SKB041.19.00.000 (on order)

MIKO-7M milli-ohmmeter can be powered from the mains (AC 90-253 V, 47-63 Hz // DC 127-354 V), and MIKO-7MA modification has a built-in battery

This instrument is easy and convenient to use and has an intuitive interface that has been repeatedly noted by the users.

In addition, the operating temperature range from -20°C to +55°C allows you to work with the device in difficult weather conditions, guaranteeing the stated accuracy of the results.

Specifications	Value
Resistance range	1 μΩ - 2 kΩ
Resolution capability	0.1 μΩ
Accuracy	±(0.1%+0.5 μΩ)
Test current output	0.01 - 10 A
Measurement display resolution	5 digits
MIKO-7MA: Power supply (built-in battery)	Li-ion battery
MIKO-7MA: Battery charge time	3 hours
MIKO-7MA: Battery runtime (in continuous operation) with output capacity 1W	8 hours
Built-in memory	up to 200 measurements
PC connection	USB cable and Bluetooth (optional)
Display	Monochrome, 128 x 64 pixels
Power consumption	120 W
Output capacity	60 W
Power supply (mains voltage)	90-253 V AC, 47-63 Hz 127-354 V DC
Dimensions	270 х 250 х 130 mm
MIKO-7MA: Main instrument weight with battery	4.0 kg
MIKO-7M: Main instrument weight without battery	2.7 kg
Operating temperature range	-20ºС - +55ºС
Environmental protection with open cover	IP40
Environmental protection with closed cover	IP67
Interface and user manual language	English
Testing period	3 years
Calibration period	3 years
Warranty period	3 years

Standard complete set

Photo	Item, Index	Application
MIKO-7М or MIKO-7MA main instrument 048.00.00.000 or 048.00.00.000-01	MIKO-7М or MIKO-7MA main instrument 048.00.00.000 or 048.00.00.000-01	Instrument and documents: User Manual and a Log Book.
Test cables on order	Test cables on order	As a matter of convenience for the user, test cables are not included to the standard complete set. Each user can select a cable to his/her own requirements. Please, select at least one test cable (see "additional complete set on order" below).
Mains cable 018.09.00.000	Mains cable 018.09.00.000	Mains cable 1 x 2 m. Weight 0.24 kg. For instrument connection to the main network. Temperature range -25°С - +120°С. Rubber insulation.
Ground cable 010.01.00.000	Ground cable 010.01.00.000	Ground cable 1 x 2 m. Weight 0.08 kg. For instrument grounding. The cable is equipped with a ground clamp and a screw end cap. Nominal test current is 50 A.
Zero resistance standard 023.15.00.000	Zero resistance standard 023.15.00.000	Resistance zero point accuracy check. Value – 0.000 µOhm.
Shunt	Shunt	Type: SV75-0075A-D-02. For checking MIKO-7M(A) operability. Value – 1 mΩ ±0.5%. SKB EP part.
Fuses	Fuses	Type: VP2B-1V-2A (ВП2Б-1В-2А) (2 pcs). For the power source protection.
Attachment devices set kit 126.06.02.000	Attachment devices set kit 126.06.02.000

Additional complete set (on order)

Photo	Item, Index	Application
Test cable 041.22.00.000	Test cable 041.22.00.000	10A Kelvin Clamp test cable 1 x 8.5 m (grip up to 70 mm) for connection to transformer bushings. Modification of the 041.18.00.000 cable. To be used on transformers with bushings located close to each other. Weight 1.72 kg. Elastic silicone tube resistant to low and high temperatures, and corrosive media.
Test cable 041.30.00.000	Test cable 041.30.00.000	10A Kelvin Clamp test cable 1 x 3.5 m (jaw up to 50 mm) for connection to transformer bushings. To be used on transformers with bushings located close to each other. Weight 0.76 kg. Elastic silicone tube resistant to low and high temperatures, and corrosive media.
Test cable 041.26.00.000	Test cable 041.26.00.000	10A Kelvin C-clamp test cable 1 x 8.5 m (jaw up to 103 mm) for connection to transformer. Weight 2.26 kg.<br> Alternative version of test cable 041.22.00.000. Elastic silicone tube resistant to low and high temperatures and corrosive media.
Test cable 041.19.00.000	Test cable 041.19.00.000	10A Kelvin test cable 1 x 3 m. Weight 0.5 kg.<br> With 2 probes and 4 crocodile clips (jaw up to 25 mm) (length: 30 mm, plug: 3 mm) for contact resistance measurement of CT and VT contact joints and windings.
Test cable 041.29.00.000	Test cable 041.29.00.000	10A Kelvin Clamp test cable 1 x 3.5 m (grip up to 70 mm) for connection to transformer bushings., to be used on transformers with bushings located close to each other. Weight 0.92 kg. <br> Elastic silicone tube resistant to low and high temperatures, and corrosive media.
Test cable for CT and VT 041.21.00.000	Test cable for CT and VT 041.21.00.000	10A Kelvin Clamp test cable 1 x 4 m (jaw up to 20 mm) for resistance measurement of CT and VT windings. Weight 0.61 kg. <br> Cable is used for CTs and VTs which are stand-alone or built into transformers / circuit breakers.
Test cable 041.28.00.000	Test cable 041.28.00.000	10A Kelvin test cable 1 x 3 m, 0,54 kg, with spring-loaded probes. To be used for electrical resistance measurement in hard-to-reach places.
Test cable extension 031.20.00.000	Test cable extension 031.20.00.000	Extension cable 1 x 6.5 m. Weight 1.18 kg.<br> Elastic silicone tube resistant to low and high temperatures and corrosive media.<br> To be used together with test cables 041.18.00.000, 041.22.00.000/(-01), 041.26.00.000, 041.29.00.000 and 041.30.00.000.
Adapter for a reference coil 023.12.00.000	Adapter for a reference coil 023.12.00.000	Length 0.025 m + 0.16 m. Weight 0.04 kg.<br> For testing laboratories: inspection / calibration of the instrument.
Tool bag 126.06.00.000	Tool bag 126.06.00.000	Convenient, robust, wear proof bag for transportation of cables, documentation and other accessories to MIKO-7M or to MIKO-7MA instruments.<br> Weight 0.6 kg.
Manipulating rod 010.41.00.000<br>010.41.00.000-01<br>010.41.00.000-02	Manipulating rod 010.41.00.000<br>010.41.00.000-01<br>010.41.00.000-02	<p> Manipulating rod is designed for test cables connection from the ground or from the tank cover to the bushings of high-voltage circuit breakers, and to the structural elements of high-voltage disconnecting switches and earthing devices, without the use of ladders or elevated platforms. </p> <p> The manipulating rod is completed with special extension cables. There is a Kelvin clamp with current and potential contacts to connect to the object on one side, and a contact pad on the other side. The device test cable is connected to the contact pad from the ground or a tank cover. </p> <p> Manipulating rod extension cable is made according to a four-wire (Kelvin) scheme with the test current capacity of 100 A in the presence of a good contact. </p> <ul> <li><a href="/instrument/manipulating/" target="_blank">Manipulating rod</a> - 2.2 (length 2.2 m / weight as an assembled set 3.4 kg);</li> <li><a href="/instrument/manipulating/" target="_blank">Manipulating rod</a> - 3.7 (length 3.7 m / weight as an assembled set 4.0 kg);</li> <li><a href="/instrument/manipulating/" target="_blank">Manipulating rod</a> - 5.1 (length 5.1 m / weight as an assembled set 4.6 kg).</li> </ul>

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Milli-ohmmeter MIKO-7M(A) review

MIKO-7M(A) is simple in use and has a intuitive interface which is very convenient for Users. More information can be found in the review and on website of manufacturer.

Milli-ohmmeter MIKO-7M(A)

DC current resistance measurement in inductive and noninductive circuits in the range from 10 µOhm ÷ 2 kOhm for the current of up to 10А.

MIKO-7M(A) CE Conformity Certificate; valid until 02.08.2025

МIКО-7М - EAC № RU Д-RU.PA03.B.34601/22; valid until 28.04.2027

MIKO-7M(A) is included in Russian State Register under #72766-18, valid until 16.10.2029

Official reviews from customers based on the results of operating SKB EP instruments are available upon request. Please, fill out the form on the website.

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