Elma BM 251s-257s
side 34
English usermanual
Elma 251s-257s
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 IEC/UL/EN61010-1
Ed. 3.0, IEC/EN61010-2-030 Ed. 1.0, IEC/EN61010-2-033 Ed. 1.0, IEC/UL/EN61010-031
Ed. 1.1 and CAN/CSA-C22.2 No. 61010-1-12 Ed. 3.0 to Category II 1000V, CAT III 600V
and CAT IV 300V AC & DC.
Terminals (to COM) measurement category:
V / mA
A / A :Category II 1000V, CAT III 600V and CAT IV 300V 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.
