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MRU-21 Earth Resistance And Resistivity Meters

Availability:

33 in stock


  • Measurement of resistance of auxiliary electrodes RS and RH
  • Measurement of interference voltage
  • Selection of maximum measuring voltage (25 V and 50 V)
  • Auto-zero function for the resistance of measurement leads (RCONT zero)

67,000.00  87,500.00 

33 in stock

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Specification

The Sonel MRU-21 earth resistance meter is a simple meter which makes it possible to measure earthing with the use of the technical method and to measure the continuity of protective and equalising connections.

Characteristic features of this model include very simple operation, excellent resistance to interference and high measurement precision. The meter allows for earth resistance measurements with auxiliary electrodes using the 3p method, as well as 2p resistance measurements. The device is also suitable for testing the continuity of equalising and protective connections. The Sonel MRU-21 meter is dedicated to employees of the power and electricity industry.MRU-21 Earth Resistance And Resistivity Meters

  • Measurement of resistance of auxiliary electrodes RS and RH
  • Measurement of interference voltage
  • Selection of maximum measuring voltage (25 V and 50 V)
  • Auto-zero function for the resistance of measurement leads (RCONT zero)

Technical Data

Measurement functions

Measurement range

Display range

Resolution

Accuracy

Interference voltage

0 V…100 V

0 V…100 V

1 V

±(2% m.v. + 3 digits)

Connection and equipotential bonding resistance

0.13 Ω…199 Ω acc. to EN 61557-4

0.00 Ω…199 Ω

from 0.01 Ω

±(2% m.v. + 3 digits)

Earth resistance

2-wire method

0.00 Ω…1.99 kΩ

0.00 Ω…1.99 kΩ

from 0.01 Ω

from ±(2% m.v. + 3 digits)

3-wire method

0.50 Ω…1.99 kΩ acc. to EN 61557-5

0.00 Ω…1.99 kΩ

from 0.01 Ω

±(2% m.v. + 3 digits)

auxiliary electrodes resistance

0 Ω…50.0 kΩ

0 Ω…50.0 kΩ

from 1 Ω

±(5% (RE +RH+RS) + 3 digits)

Downloads

Technical Datasheets – MRU-21 Earth Resistance And Resistivity Meters

Technical Manual – MRU-21 Earth Resistance And Resistivity Meters

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