Microhmmeters

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Microhmmeter tc-2-20

Microhmmeter tc-2-20



Microhmmeter TC-2-20 is designed for the measurement of the small values of the electric resistance under the laboratory and production facility environment.

The instrument can be used for:
 - Measurement of the meter-long conductor pieces of the power cords according to GOST 7229 (during the process control at the manufacturing companies and for the acceptance control at the cable-consuming plants);
 - Monitoring the electric resistance of the low-resistivity bypasses by the standardization and metrology centers.
 - Nondestructive testing of the metal structures and transformer facility units.

It provides:
 - Scaling the measured resistance values to 20 °C on the basis of the selected material (copper/aluminium) and measured ambient air temperature;
 - Estimation of the monitored item specific resistance according to the measured resistance and input section value (of the conductor).

  

Technical Characteristics
Name Values

Measuring resistance range, O

10-8...10-2

Conventional error of measurement, %, no more than

± 0,2

Survey current rate, A, no more than;
Subrange, O:

10-8÷10-4


10-7÷10-3


10-6÷10-2         

                                            

 20

20

10

Operation temperature range, °C

5...60

Temperature accuracy, °C

±0.1

Instrument supply from the power line with the frequency of 50 Hz, V

220

Input power, W, no more than

80

Weight (without the measurement cables), kg, max

3,85

Overall dimensions, mm, max

300х160х340

Against the additional order the instrument can be completed with the contact-clamping devices of the in-line holding for the connection of the measured item via the 4-wire circuit.

The instrument is at the certification stage. The calibration certificate is provided when the instrument is delivered.