MRU-21 earth resistance meter WMPLMRU21

A simple MRU-21 meter allows you to measure earthing using the technical method and measure the continuity of protective and equipotential bonding. The device is characterized by ease of use, high resistance to interference and high accuracy.

Allows you to perform measurements of:

• earth resistance using auxiliary electrodes using the 3p method , measurements with resistance of auxiliary probes up to max. 50 kΩ,
• 2p resistance,
• continuity of equipotential bonding and protective connections (meeting the requirements of PN-EN 61557 - 4) - current 200 mA with auto-zeroing function.

Additionally:

• measurement of resistance of auxiliary electrodes RS and RH,
• measurement of interference voltage,
• measurement in the presence of mains interference voltages,
• selection of the maximum measurement voltage (25 V and 50 V),
• memory for 990 measurements,
• data transmission to a USB computer,< /li>
• indication of battery or accumulator charge status.
• battery or accumulator power supply.

Electrical safety:

• type of insulation: double, in accordance with PN-EN 61010 - 1 and IEC 61557,
• measurement category: CAT IV 300 V
• degree of housing protection: IP54 .

Nominal conditions of use:

• operating temperature: -10...+55°C,
• storage temperature: -20...+70°C,
• humidity: 20...80%.

Other technical data:

• LCD display: segmented with backlight,
• interface: USB,
• number of measurements performed from a set of alkaline batteries > 1000 (5 Ω, 2 measurements/min).