Safety Features And Precautions - Gossen MetraWatt METRAHIT T-COM PLUS Operating Instructions Manual

Safety Warnings
1

Safety Features and Precautions

You have selected an instrument which provides you with a high
level of safety.
This instrument fulfills the requirements of the applicable EU
guidelines and national regulations. This is confirmed by means of
the CE mark. A corresponding declaration of conformity can be
requested from GMC-I Messtechnik GmbH.
The TRMS digital multimeter has been manufactured and tested
in accordance with the following safety regulations:
IEC 61010–1:2010 / DIN EN 61010–1:2011 /VDE 0411–1:2011.
When used for its intended purpose (see page 10), safety of the
operator, as well as that of the instrument, is assured. 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.
8
Measuring Categories and their Significance per IEC 61010-1
CAT
Measurements in electrical circuits which are not directly connected to the
I
mains: e.g. electrical systems in motor vehicles and aircraft, batteries etc.
Measurements in electrical circuits which are electrically connected to the
II
low-voltage mains: via plug, e.g. in household, office and laboratory applications
Measurements in building installations: stationary consumers, distributor
III
terminals, devices connected permanently to the distributor
The measuring category and the maximum rated voltage which
are printed on the device apply to your measuring instrument, e.g.
600 V CAT II.
For the application of measuring cables see page 72.
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 standards 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 allowable voltage between the voltage measuring
sockets or all connector sockets and ground is 600 V for mea-
suring category II, and 300 V for measuring category III.
• Be prepared for the occurrence of unexpected voltages at
devices under test (e.g. defective devices). For example,
capacitors may be dangerously charged.
Definition
GMC-I Messtechnik GmbH