TrueRMS
Industrial
MultimeterUser's
Guide
True RMS Industrial Multimeter User's Guide
5
2-1 Per IEC1010 Overvoltage Installation Category
Overvoltage Category I
Overvoltage CategorY II
Overvoltage Category III
Overvoltage Category IV
2-2 Cautions
Equipment of OVERVOLTAGE CATEGORY I is equipment
for connection to circuits in which measures are taken to limit
the transient overvoltages to an appropriate low level.
Note – Examples include protected electronic circuits.
Equipment of OVERVOLTAGE CATEGORY II is energy-
consuming equipment to be supplied from the fixed installation.
Note – Examples include household, office, and laboratory
appliances.
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.
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
Improper use of this meter can cause damage,shock,injury
or death.Read and understand this user manual before
operating the meter.
Always remove the test leads before replacing the battery
or fuses.
Inspect the condition of the test leads and the meter itself
for any damage before operating the meter.
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