Sonel MRU-10 Handheld Earth Resistance Meter CAT IV

It allows to:

• measure earthing resistance using auxiliary electrodes,
• measurement of resistance of auxiliary electrodes R_S and R_H,
• measurement of interference voltage,
• measurement in the presence of interference voltage in the power network with frequency 50 Hz and 60 Hz,
• selection of maximum measuring voltage (25 V and 50 V),
• indication of battery state.

Measurement of interference voltage U_N (RMS)

Measurement of earthing resistance (method 3-pole)
measurement range to IEC 61557-5:2007: 0,53 Ω...9999 Ω (for 50 V)

• measurement current: under short circuit >20 mA,
• voltage on open terminals: selectable 25 V AC or 50 V AC,
• frequency of measurement current: 125 Hz (for networks 50 Hz) or 150 Hz (for 60 Hz),
• selection of measuring frequency in settings.

Measurement of earthing resistance (method 2-pole)

Measurement of earthing resistance (method 2-pole) R_H and R_S

Electric security:

• type of insulation: double, according to EN 61010-1 and IEC 61557,
• measurement category: CAT IV 150 V acc. to EN 61010-1,
• protection class acc. to EN 60529: IP67.

Rated operational conditions:

• operation temperature: -10...+50°C,
• storage temperature: -20...+60°C,
• humidity: 20...90%.

Other technical data:

• LCD display: segment, backlit,
• dimensions: 221 x 102 x 62 mm,
• number of measurements (RE3P) carried out of set of batteries: > 3000