Manual Gossen Metrawatt METRAHIT ULTRA BT (page 8 of 74) (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 high

levels of safety.

This instrument fulfills all requirements of applicable European and

national EC directives. We confirm this with the CE mark. The rel-

evant 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 61010–1:2010/DIN EN 61010–1:2010/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 thor-

oughly 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 al-

lows access to those jacks which are actually required for the se-

lected function. It 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), switching to low-imped-

ance measuring functions (switch position Ω, continuity, tempera-

ture or capacitance) causes “HiVoLt” to appear at the display and

the respective measurement is disabled.

Hazardous touch voltages are not detected when the ohm or

capacitance measurement is selected.

If the instrument switches itself off in the event that hazardous

touch 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 maximum rated voltage which

are printed on the device apply to your measuring instrument, for

example 600 V CAT III.

Refer to section 10 regarding use of the measurement cables.

Observe the following safety precautions:

• The multimeter may not be used in potentially explosive atmo-

spheres or in the vicinity of unprotected detonators or other ex-

plosive material.

•The Bluetooth function may not be activated on board of air-

crafts according to the FCC or FAA guidelines as critical aircraft

instruments might be disturbed.

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 electrically connected to the low-

voltage mains:

via plug, e.g. in household, office and laboratory applications

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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Gossen Metrawatt METRAHIT ULTRA BT Manual

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