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DC current resistance measurement in inductive and noninductive circuits in the range from 10 µOhm ÷ 2 kOhm for the current of up to 10А
Specific modes for measuring different objects
High precision of measurements both in laboratory environment and at substations
High level of protection and safety conformance in regard to
History of measurements stored in the instrument
Personal computer connection through USB or Bluetooth
Measuring cables of ergonomic design
Power from the mains and/or integrated storage battery
Milliohmmeter – easy-to-use, modern and convenient instrument

Milliohmmeter MIKO-7M(A) new version

Certificates
  • Conformity certificate with safety requirements EC/EU
  • Russian State Register Certificates
  • Declaration of Conformity of the Customs Union
DC current resistance measurement in inductive and noninductive circuits in the range from 10 µOhm ÷ 2 kOhm for the current of up to 10А
  • Windings of power and measurement transformers, windings of electric motors, generators, linear compensators and windings of other high-inductance equipment;
  • Contacts of circuit breakers, resistors, buses and other inductance-free circuits;
  • Selector contacts of OLTC devices,  of earthing devices, disconnecting switches and of other detachable and non-detachable contacts.
Specific modes for measuring different objects

The device integrates special-purpose modes for measuring different objects with account of their specific features: resistive and inductance objects; voltage transformers; current and power transformers;.

High precision of measurements both in laboratory environment and at substations

High precision of measurements both in laboratory environment and at substations under industrial noises is achieved owing to calculation and setting (for any resistance) of specific maximum possible test current limited by effective power of the device only. Therefore, ratio between a valid signal to winding resistance and the noise amplitude remains high at any resistance.

High level of protection and safety conformance in regard to
  • exceeding of measuring current;
  • electromotive force (emf) of self-induction.

At disconnection of the measuring 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 measuring cable or power cable protecting users from electric shock and the instrument from being damaged.

  • a set of required protective means against superheat of the measuring unit;
  • protection grounding contact in the mains plug and safety earthing terminal on the case of the measuring unit.
History of measurements stored in the instrument
Designed for viewing, copying and deleting of measurement results, stored in the non-volatile memory of the instrument (up to 100 cell measurements).
Personal computer connection through USB or Bluetooth

Allows for:

  • Controlling the instrument with the help of PC;
  • Systematizing and storing the results on computer;
  • Drawing up of measurement reports

Data transmission to the computer and filing of measurement results is performed with the help of a special program developed by the manufacturer.

Measuring cables of ergonomic design

Cables of different length and the grip of alligator type clamps allowing performance of ground measurement as well as the measurement from the cover of transformers of all voltage types.

Power from the mains and/or integrated storage battery

For customer’s choice the MIKO-7M milliohmmeter has two modifications: with an in-built battery (MIKO-7MA) and without an in-built battery (MIKO-7M). The device can also be powered from the mains (≃ 110÷220, 330V).

Milliohmmeter – easy-to-use, modern and convenient instrument

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

Specifications Value
Resistance range 10 µOhm ÷ 2 kOhm
Maximum permissible intrinsic error of resistance measurement ±(0.1% + 0.5 µOhm)
Best resolution 0.1 µOhm
Measuring current intensity, А 0.005 ÷ 10
Relative drift of measuring current intensity, %/s ±0.002
Maximum consumed power, W 120
Maximum output capacity, W 60
Mains voltage: AC (valid value) 90 ÷ 253V
Mains voltage: DC 127 ÷ 354V
Period of charging a completely discharged battery, not to exceed 3 hrs
Type of data transmission channel USB, Bluetooth
IP rating in operating state IP40
IP for transportation IP67
Operating temperature range, ºС -20 ÷ +55
Maximum measuring unit weight with battery, kg (MIKO-7MA) 4.0
Maximum measuring unit weight without the battery, kg (MIKO-7M) 2.7
Dimensions, mm 270х250х130
Interface language English
User manuals language English
Calibration interval, year 3
Standard complete set
Photo Item, Index Application
MIKO-7М or MIKO-7MA<br>measuring unit MIKO-7М or MIKO-7MA
measuring unit
SKB048.00.00.000
or SKB048.00.00.000-01
Instrument and covering documents: Calibration Certificate, User's Manual, and a Log Book.
Measuring cables <br><b>on order</b> Measuring cables
on order
As a matter of convenience for the user, measuring cables are not included in the standard complete set. Each user can select a cable to his/her own requirements. Select at least one measuring cable (see "additional complete set on order" below).
Mains cable Mains cable SKB018.09.00.000 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 Ground cable SKB010.01.00.000 Ground cable 1 x 2.24 m. Weight 0.08 kg.
For instrument grounding. Terminated with a G-clamp and a lug for a screw. Rated current is 50A.
Zero resistance equivalent Zero resistance equivalent SKB023.15.00.000 Resistance zero point accuracy check. Value – 0.000 µOhm.
Shunt Shunt Type: 75ShSM M3 (75ШСМ М3). For checking MIKO-7M operability.
Safety devices Safety devices Type: VP2B-1V-2A (ВП2Б-1В-2А) (2 pcs). For the power source protection.
Attachment devices set kit Attachment devices set kit SKB126.06.02.000
Additional complete set (on order)
Photo Item, Index Application
Measuring cable Measuring cable SKB041.18.00.000 Current cable 1 x 8.5 m with crocodile clips (jaw up to 80 mm). Weight1.72 kg.
Elastic silicone tube resistant to low and high temperatures and corrosive media.
Measuring cable Measuring cable SKB041.26.00.000 Current cable 1 x 8.5 m with a G-clamp (jaw up to 103 mm) for connection to transformer. Weight 2.26 kg.
Alternative version of measuring cable СКБ041.18.00.000. Elastic silicone tube resistant to low and high temperatures and corrosive media.
Test cables for CT and VT Test cables for CT and VT SKB041.21.00.000 Current cable 1 x 4 m with crocodile clips (jaw up to 25 mm) for resistance measurement of CT and VT windings. Weight 0.61 kg.
Capable for in-built and stand-alone transformers / circuit-breaker.
Measuring cable Measuring cable SKB041.19.00.000 Current cable 1 x 3 m. Weight 0.5 kg.
With 2 crocodile clips (jaw up to 25 mm) and 2 removable probes (length: 70 mm, plug: 3 mm) for transient resistance measurement of CT and VT contact joints and windings.
Measuring cable extension Measuring cable extension SKB031.20.00.000 Extension cable 1 x 6.5 m. Weight 1.18 kg.
Elastic silicone tube resistant to low and high temperatures and corrosive media.
To be used together with measuring cables СКБ041.18.00.000 (jaw up to 80 mm) and СКБ041.26.00.000 (jaw up to 103 mm).
Cable USB 2.0 A-B Cable USB 2.0 A-B USB cable 1 x 2m. For computer connection and data transfer.
Reference inductor adaptor Reference inductor adaptor SKB023.12.00.000 Reference inductor adaptor 2 x 0.025 m + 0.16 m. Weight 0.049 kg.
For testing laboratories: inspection / calibration of the instrument.
Tool bag Tool bag SKB126.06.00.000 Convenient, robust, wear proof bag for transportation of cables, documentation and other accessories to MIKO-7M or to MIKO-7MA instruments.
Manipulating rod Manipulating rod SKB110.41.00.000
SKB110.41.00.000-01
SKB110.41.00.000-02
The rod is designed to ensure convenient connection to contacts of a transformer inputs.

The rod is completed with a clamp with current and potential contacts connected by wires with the measurement platform. Test cables are connected to the measurement platform from the ground.

MIKO-7M(A) CE Conformity Certificate; valid until 11.07.2022
МIКО-7М - ЕАЭС N RU Д-RU.PA01.B.83695; valid until 09.04.2023
Reviews (1)
Comparison of milliohmmeters produced by SKB EP
Comparison of milliohmmeters produced by SKB EP
SKB EP Company sells three types of instruments for measurement of DC electric resistance of windings of transformers, electric motors, electric magnets, cables and of other inductance and inductance-free circuits: the MIKO-7 with basic and updated software, the MIKO-7M, MIKO-8M and the MIKO-9.
Milliohmmeter MIKO-7M(A)
Milliohmmeter 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.
Available after registration

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