Gossen Metrawatt M630A – Low-Value Resistance Measuring Instrument

Digital, low-value resistance measuring instrument per VDE 0 413 part 4 and EN 61 557 parts 1 and 4.

Applications

The METRAOHM 413 is a battery-powered instrument for the measurement of low-value resistances in electrical systems. Large protective conductors, earthing, equipotential bonding and lightning protection systems can also be tested quickly and safely with the METRAOHM 413. Resistance is measured between reference earth (e.g. an equipotential bonding strip) and any desired points to this end. A measuring current of 200 mA and automatic functions assure reliable measuring results.

Easy Operation

Operation is very easy. Measurement cables of almost any length can be used thanks to the offset balancing function. Measurement polarity can be reversed, and both measured values are stored in memory for subsequent comparison. Resultant deviations in the measuring results (e.g. possible galvanic voltages) can thus be recognized.

Offset Balancing

Offset balancing compensates for measurement cable resistance. The offset value is saved to memory and is utilized for all future measurements until balancing is performed once again. The value remains in memory, even after the measuring instrument has been switched off. A variety of measurement cables with resistances of up to 3.5 Ω can be used.

Protection Against Operator Error

The METRAOHM 413 is protected against inadvertent connection to devices under test with fault voltages of up to 500 V by means of protective devices.

Interference Voltage Warning

Interference voltage is indicated visually with a red LED, and audibly with an acoustic warning signal. The voltage value is displayed on the LCD as well, as long as the test probe makes contact.