Bedienungsanleitung Gossen Metrawatt METRAHIT BASE (Seite 9 von 71) (Englisch)

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GMC-I Messtechnik GmbH 9

Safety Precautions

• Be prepared for the occurrence of unexpected voltages at

devices under test (e.g. defective devices). For example,

capacitors may be dangerously charged.

• Make certain that the measurement cables are in flawless

condition, e.g. no damage to insulation, no interruptions in

cables or plugs etc.

• No measurements may be made with this instrument in

electrical circuits with corona discharge (high-voltage).

• Special care is required when measurements are made in HF

electrical circuits. Dangerous pulsating voltages may be

present.

• Measurements under moist ambient conditions are not

permitted.

• Be absolutely certain that the measuring ranges are not

overloaded beyond their allowable capacities. Limit values are

included in chapter 8, “Technical Data”, in the table entitled

“Measuring Functions and Measuring Ranges” in the “Over-

load Capacity” column.

• The multimeter may only be operated with installed batteries or

rechargeable batteries. Dangerous currents and voltages are

otherwise not indicated, and the instrument may be damaged.

• The instrument may not be operated if the fuse cover or the

battery compartment lid has been removed, or if its housing is

open.

• The input for the current measuring range is equipped with a

fuse link (exception: METRAHIT⏐B

ASE).

Maximum permissible voltage for the measuring circuit (= rated

voltage of the fuse) is 1000 V AC/DC.

Use specified fuses only (see page 59)! The fuse must have a

breaking capacity of at least 30 kA.

Opening of Equipment / Repair

The equipment may be opened only by authorized service per-

sonnel to ensure the safe and correct operation of the equipment

and to keep the warranty valid.

Even original spare parts may be installed only by authorized serv-

ice personnel.

In case the equipment was opened by unauthorized personnel,

no warranty regarding personal safety, measurement accuracy,

conformity with applicable safety measures or any consequential

damage is granted by the manufacturer.

Repair and Parts Replacement

When the instrument is opened, voltage conducting parts may be

exposed. The instrument must be disconnected from the measur-

ing circuit before the performance of repairs or the replacement of

parts. If repair of a live open instrument is required, it may only be

carried out by trained personnel who are familiar with the dangers

involved.

Defects and Extraordinary Strains

If it may be assumed that the instrument can no longer be

operated safely, it must be removed from service and secured

against unintentional use.

Safe operation can no longer be relied upon:

• If the device demonstrates visible damage

• If the instrument no longer functions, or if malfunctioning

occurs

• After long periods of storage under unfavorable conditions,

e.g. humidity, dust or extreme temperature (see “Ambient Con-

ditions” on page 60)

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