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6000 COUNTS DIGITAL MULTIMETER
USER'S MANUAL
2
Overvoltage
category
In brief Examples
CAT Electronic
Protected electronic equipment.
Equipment connected to (source) circuits in which measures are taken
to limit transient overvoltages to an appropriately low level.
Any high-voltage, low-energy source derived from a highwinding
resistance transformer, such as the high-voltage section of a copier.
CAT
Single-phase
receptacle
connected loads
Appliance, portable tools, and other household and similar loads.
Outlet and long branch circuits.
Outlets at more than 10 meters (30 feet) from CAT III source.
Outlets at more that 20 meters (60 feet) from CAT IV source.
CAT
Three-phase
distribution,
including
single-phase
commercial lighting
Equipment in fixed installations, such as switchgear and polyphase
motors.
Bus and feeder in industrial plants.
Feeders and short branch circuits, distribution panel devices.
Lighting systems in larger buildings.
Appliance outlets with short connections to service entrance.
CAT
Three-phase at
utility connection,
any outdoor
conductors
Refers to the “origin of installation”; i.e., where low-voltage connection is
made to utility power.
Electricity meters, primary overcurrent protection equipment.
Outside and service entrance, service drop from pole to building, run
between meter and panel.
Overhead line to detached building, underground line to well pump.
* When using this Multimeter, the user must observe all normal safety rules concerning:
protection against the dangers of electric current.
protection of the Multimeter against misuse.
* For your own safety, only use the test probes supplied with the instrument. Before use, check that they are in good
condition.