Gossen MetraWatt METRAOHM 413 Quick Start Manual

413
METRAOHM⏐
Low-Resistance Ohmmeter
• Handy measuring instrument per VDE 0413 part 4 / EN 61557-1 / -4
• Large measuring range from 0.01 to 1999 kΩ
• Measurement cable zero balancing
• Compact and durable
For rugged service calls and laboratory use
• Overvoltage protection
Protects the instrument in the event of inadvertent connection
to mains voltage
• Indication of interference voltage
• IP 65 protection

Applications

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The METRAOHM is a battery powered instrument for the mea-
surement of low-value resistances in electrical systems.
Large protective conductor, 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.
– Adjustment of shunts in instrumentation applications
– Testing of electrical connections at busbars in open-pit
mining, in industry and in household applications
– Testing of cable resistance, wiring, shunt resistors in printed
circuit boards and thick-film circuits
– Measurement of contact resistance in relays, power
contactors and load interrupters
– Measurement of fuse resistance, as well as cable resistance in
heavy current circuits
– Testing of coil resistance in transformers, coils, small motors
etc.
GMC-I Messtechnik GmbH

Description

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 to 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

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The METRAOHM 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 at the LCD as well, as long as the test probe makes
contact.
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