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Operation
Introduction
The MCM 1 is intended for measuring Category CAT III systems and for voltages that do not ex-
ceed 600 V (AC or DC) in grounded state.
Operation
Before taking a measurement, allow the instrument to acclimatize.
The user must comply with all the usual safety regulations when using this tong meter.
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The instrument can indicate gross errors if it is used in the vicinity of appliances that cause in-
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terference or noise.
Only use the instrument as described in this manual, otherwise the protective equipment of
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the instrument could be impaired.
Only use the instrument if the housing and tong jaws are in a faultless condition.
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To prevent damage to the instrument, do not exceed the maximum input values given in the
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Technical Data.
Pay attention to the function selection switch and make sure that it is set at the correct posi-
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tion before each measurement.
Pay especial attention to tasks performed on naked cables or busbars. (Wear protective cloth-
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ing if necessary)
Every inadvertent contact with the conductor can result in an electric shock.
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Exercise caution when working with voltages greater than 60 V DC or 30 V AC RMS. Such
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voltages bring the danger of an electric shock.
Ensure that your fingers are behind the safety ring during measurement.
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To prevent incorrect measured values: Change the batteries when the
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pears.
Ensure that the test instrument is fully serviceable before each measurement. Test the func-
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tion using a known, functioning power source before using the instrument.
Always discharge the capacities and disconnect the test instrument from the power supply be-
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fore performing resistance or continuity measurements.
Insecure connections with the installed electrical contacts mean that voltage tests performed
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on sockets can pose problems and produce misleading results. As such, take measures to en-
sure that the lines are not live.
Exercise caution when working in the vicinity of open, accessible conductors or bus bars.
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Use personal protective equipment.
Do not use a current measuring sensor with visible wear on the tongs.
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– symbol ap-
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