- 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.
SPECIAL DESIGN BUREAU
OF ELECTRIC INSTRUMENT ENGINEERING
OF ELECTRIC INSTRUMENT ENGINEERING
If you have any questions contact our manager 24/7:
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
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
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.
Measuring cable СКБ041.18.00.000 (on order)
Measuring cable СКБ041.26.00.000 (on order)
Test cables for CT and VT СКБ041.21.00.000 (on order)
Measuring cable СКБ041.19.00.000 (on order)
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 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 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 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 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 SKB023.15.00.000 | Resistance zero point accuracy check. Value – 0.000 µOhm. |
|
Shunt | Type: 75ShSM M3 (75ШСМ М3). For checking MIKO-7M operability. |
|
Safety devices | Type: VP2B-1V-2A (ВП2Б-1В-2А) (2 pcs). For the power source protection. |
|
Attachment devices set kit SKB126.06.02.000 |
Additional complete set (on order)
| Photo | Item, Index | Application |
|---|---|---|
|
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 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 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 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 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 | USB cable 1 x 2m. For computer connection and data transfer. |
|
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 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
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)
8 february 2018
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.
Video reviews (1)
5 july 2019
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
