Manual Gossen Metrawatt METRAHIT BASE (page 8 of 71) (English)

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8 GMC-I Messtechnik GmbH

Safety Precautions

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 applicable European

and national EC directives. 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/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.

The multimeter is equipped with an automatic socket blocking

mechanism for your safety, and in order to safeguard your

instrument. This mechanism is linked to the rotary switch and only

allows access to those jacks which are actually required for the

selected function. It also prevents the user from turning the rotary

switch to impermissible functions after the measurement cables

have already been plugged in.

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, for

example 1000 V CAT III.

For the application of measuring cables see page 66.

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 ca-

pable of recognizing contact hazards and taking the appropriate

safety precautions. Contact hazards according to standard

exist anywhere, where voltages of greater than 33 V RMS or

70 V DC may occur. Avoid working alone when taking meas-

urements which involve contact hazards. Be certain that a sec-

ond person is present.

• Maximum allowable voltage between the voltage measuring

terminals, and between all connections and earth is 1000 V for

measuring category III, or 600 V for measuring category IV.

CAT Definition

Measurements in electrical circuits

which are not directly connected to the mains:

for example electrical systems in motor vehicles and aircraft, batteries etc.

Measurements in electrical circuits

which are electrically connected to the low-voltage mains:

with plugs, e.g. at home, in the office or laboratory etc.

III

Measurements in building installations:

stationary power consumers, distributor terminals, devices connected

permanently to the distributor

Measurements at power sources for low-voltage installations:

meters, mains terminals, primary overvoltage protection devices

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Gossen Metrawatt METRAHIT BASE Manual

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