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1) SAFETY
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.
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 IV 1000 Volts AC & DC.
TBM811, TBM812 & TBM829 Terminals (to COM) measurement category:
V : Category IV 1000 Volts AC & DC
mAA : Category IV 600 Volts AC and 300 Volts DC
A : Category IV 600 Volts AC and 300 Volts DC
TBM811XEX, TBM812XEX & TBM525 Terminals (to COM) measurement category:
V / mAA / A : Category IV 1000 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.
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