Terms In This Manual - Extech Instruments MultiMaster MM560A User Manual

1) SAFETY
This manual contains information and warnings that must be followed for operating the instrument
safely and maintaining the instrument in a safe operating condition. If the instrument is used in a
manner not specified by the manufacturer, the protection provided by the instrument may be impaired.
The meter is intended only for indoor use.
The meter protection rating, against the users, is double insulation per IEC61010-1 2nd Ed.,
EN61010-1 2nd Ed., UL61010-1 2nd Ed. and CAN/CSA C22.2 No. 61010.1-0.92 to Category III 1000
Volts AC & DC and Category IV 600 Volts AC & DC.
MM560A Terminals (to COM) measurement category:
V : Category III 1000 Volts AC & DC, and Category IV 600 Volts AC & DC.
A / mAA : Category III and Category IV 600 Volts AC and 300 Volts DC.
MM570A Terminals (to COM) measurement category:
V / A / mAA : Category III 1000 Volts AC & DC, and Category IV 600 Volts AC & DC.
Per IEC61010-1 2nd Ed. (2001) Measurement Category
Measurement Category IV (CAT IV) is for measurements performed at the source of the low-voltage
installation. Examples are electricity meters and measurements on primary overcurrent protection
devices and ripple control units.
Measurement Category III (CAT III) is for measurements performed in the building installation.
Examples are measurements on distribution boards, circuit- breakers, wiring, including cables,
bus-bars, junction boxes, switches, socket-outlets in the fixed installation, and equipment for industrial
use and some other equipment, for example, stationary motors with permanent connection to the fixed
installation.
Measurement Category II (CAT II) is for measurements performed on circuits directly connected to
the low voltage installation. Examples are measurements on household appliances, portable tools and
similar equipment.

TERMS IN THIS MANUAL

WARNING identifies conditions and actions that could result in serious injury or even death
to the user.
CAUTION identifies conditions and actions that could cause damage or malfunction in the
instrument.
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