Gossen MetraWatt METRACAL MC, Руководство по эксплуатации

Страница: 8 / 84

8 GMC-I Messtechnik GmbH
Safety Precautions
1 Safety Features and Precautions
You have selected an instrument which provides you with high
levels of safety.
This instrument fulfills all requirements of applicable European and
national EC directive. We confirm this with the CE mark. The
relevant declaration of conformity can be obtained from
GMC-I Messtechnik GmbH.
The device has been manufactured and tested in accordance
with safety regulations IEC 61010–1/DIN EN 61010–1/
VDE 0411–1. When used for its intended purpose (see page 10),
safety of the operator, as well as that of the instrument, is as-
sured. Their safety is however not guaranteed, if the
instrument is used improperly or handled carelessly.
In order to maintain flawless technical safety conditions, and to assure
safe use, it is imperative that you read the operating instructions
thoroughly and carefully before placing your instrument into service, and
that you follow all instructions contained therein.
Measuring Categories and their Significance per IEC 61010-1
The measuring category and the maximum rated voltage which
are printed on the device apply to your measuring instrument, e.g.
300 V CAT II.
Refer to section 11.2 regarding use of the measurement cables.
Observe the following safety precautions:
• The multimeter may not be used in potentially explosive
atmospheres .
• The multimeter may only be operated by persons who are
capable of recognizing contact hazards and taking the
appropriate safety precautions. Contact hazards according to
the standard exist anywhere, where voltages of greater than
33 V RMS or 70 V DC may occur. Avoid working alone when
taking measurements which involve contact hazards. Be
certain that a second person is present.
• Maximum permissible voltage
between the voltage measuring sockets or all connector sock-
ets and ground is 300 V for measuring category II.
• Be prepared for the occurrence of unexpected voltages at
devices under test (e.g. defective devices). For example,
capacitors may be dangerously charged.
CAT Definition
I
Measurements in electrical circuits
which are not directly connected to the mains,
e.g. electrical systems in motor vehicles and aircraft, batteries etc.
II
Measurements in electrical circuits
which are directly connected to the low-voltage mains
via plug, e.g. in household, office and laboratory applications etc.
III
Measurements in building installations:
stationary consumers, distributor terminals, devices connected permanently to
the distributor