Manual Gossen Metrawatt METRAHIT ENERGY (page 7 of 98) (English)

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GMC-I Messtechnik GmbH 7

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 directives. We confirm this with the CE mark. The

relevant declaration of conformity can be obtained from GMC-I

Messtechnik GmbH.

The TRMS digital multimeter has been manufactured and tested

in accordance with the following safety regulations:

IEC 61010–1:2001 / DIN EN 61010–1/VDE 0411–1:2002. When

used for its intended purpose (see page 9), safety of the operator,

as well as that of the instrument, is assured. Their safety is howe-

ver 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 instru-

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

allows access to those jacks which are actually required for the

selected function (exception: the voltage jack is open during cur-

rent measurement, but a visible red ring warns the user of possi-

ble incorrect connection). The socket blocking mechanism also

prevents the user from turning the rotary switch to impermissible

functions after the measurement cables have already been

plugged in.

If dangerous voltages are applied in the high-impedance voltage

measuring functions (switch position V or PQ), switching to low-

impedance measuring functions (switch position MHz, Ω, conti-

nuity, temperature or capacitance) causes “HiVoLt” to appear at

the display and the respective measurement is disabled.

Hazardous contact voltages are not detected when the ohm or

capacitance measurement is selected.

If the instrument switches itself off in the event that hazardous

contact voltage is applied (only possible during memory mode

operation), the high-voltage warning symbol remains visible at the

display.

Measuring Categories and their Significance per IEC 61010-1

The measuring category and the associated maximum rated vol-

tage which are printed on the device apply to your measuring ins-

trument, e.g. 600 V CAT III.

Refer to section 10.2 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 ca-

pable 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 TRMS or

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

surements which involve contact hazards. Be certain that a

second person is present.

CAT Definition

Measurements in electrical circuits which are not directly connected to the

mains, e.g. electrical systems in motor vehicles and aircraft, batteries etc.

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

Measurements at power sources for low-voltage installations:

meters, mains terminals, primary overvoltage protection devices

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