Extech Instruments MN30 User Manual page 2

Introduction
Thank you for selecting the Model MN30 True RMS
AutoSensing
(NCV). The MN30 automatically senses AC Voltage, DC Voltage
or Resistance/Continuity measurement types. This device is
shipped fully tested and calibrated and, with proper use, will
provide years of reliable service. Please visit our website
(www.extech.com) to check for the latest version of this User
Manual, Translations, Product Updates, Product Registration,
and Customer Support.
Features
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PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY
OVERVOLTAGE CATEGORY I
Equipment of OVERVOLT AGE CATEGORY I is equipment for connection to circuits in
which measures are taken to limit the transient over-voltages to an appropriate low
level.
Note – Examples include protected electronic circuits.
OVERVOLTAGE CATEGORY II
Equipment of OVERVOLTAGE CATEGORY II is energy-consuming equipment to be
supplied from the fixed installation.
Note – Examples include household, office, and laboratory appliances.
OVERVOLTAGE CATEGORY III
Equipment of OVERVOLTAGE CATEGORY III is equipment in fixed installations.
Note – Examples include switches in the fixed installation and some equipment for
industrial use with permanent connection to the fixed installation.
OVERVOLTAGE CATEGORY IV
Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin of the installation.
Note – Examples include electricity meters and primary over-current protection
equipment.
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