Small-size microohmmeter MIKO-10

MIKO-10 is applied in electric networks, power plants or substations, traction substations of electrified transport, as well as in industrial enterprises where 10 A current is sufficient for measurements.

In turn, test current in similar instruments does not ex- ceed 2 A, so that MIKO-10 (with test current up to 10 A and the weight of 0.5 kg) achieves leading positions among microohmmeters of this class. 

In case of obvious oxide film on the contacts more powerful microohmmeters are recommended, such as MIKO-21 (current of up to 200A) or MIKO-2.3 (current of up to 1000A), as measurements using low currents in such instances can show higher values of resistance and, as a result, the contacts may be unjustifiably rejected.

Different measurement modes are implemented in the instrument:

AUTO: is intended for contact resistance measure- ment of HV circuit breakers w/o CT and any demount- able or nondemountable connections on current 1A or 10 A. The measurement starts automatically by the circuit closing;

SINGLE: is intended for contact resistance meas- urement of HV circuit breakers w/o CT and any de- mountable or nondemountable connections on current 1 A or 10 A. The measurement starts by the User’s command;

BUILT-IN CT: is intended for contact resistance measurement of HV circuit breakers with CT on current 10 A. The measurement starts by the User’s command. 

• Auto thermal EMF balancing in the test circuit; 
• Auto power off, if the instrument is not used; 
• Circuit continuity test; 
• Auto measurement start against the test circuit continuity confirmation; 
• Audible indication of the measurement start and stop. 

One battery charge is enough for at least 1000 measurements at maximum current.

The instrument has an energy independent memory of up to 100 recordings, which is sufficient for overall and complex test of a transformer substation.

USB connection to PC facilitates classification and storage of recordings on the computer and generation of measurement reports.

Special software developed by the manufacturer is used for data transfer to the computer and for recordings archiving.

The built-in battery of MIKO-10 makes the operation pro- cess fully self-contained. One battery charge is enough for more than 1000 measurements at max current. Non-volatile memory up to 100 tests ensures a complex test of a transformer substation.

MIKO-10 can justly be refered to portable instruments due to its light weight of 0.5 kg and small dimensions 165 × 100 × 60 mm.

The above peculiarities ensure complete autonomy of the instrument over the vast territory of substation or facility.

The instrument is placed into an ergonomic case that can be fixed on the wrist by special belts, thus leaving both hands free to facilitate measurement process.

Moreover, the instrument can be easily removed from the wrist and fixed on the waist or on the neck, and also installed on any flat surface.

• Cables with needle-type spring loaded contacts. For instance, can be used to test the resistance of busbars and terminal buses;
• Test cables with crocodile clips;
• Test cables with probes; 
• Protective case;
• Multi-function belts; 
• Wearproof tool bag. 

Test cable 2 x 1.7m with crocodile clips (jaw up to 50 mm)

Test cable 2 x 4.8 m with a crocodile clip (jaw up to 50 mm)

Test cable 2 x 1.5 m with spring loaded needle-type contacts

Test cable 2 x 1.5 m with two probes and four isolated crocodile clips A25C

High accuracy of results is ensured even for diagnosis in heavy weather conditions. The MIKO-10 operation is guaranteed at a temperature range from -20 to +55 °С.