Ht-instruments MACROTEST 5035 Bedienungsanleitung PDF herunterladen (Seite 5)

MACROTEST 5035

EN - 4

1.2. DURING USE

Carefully read the following recommendations and instructions:

CAUTION

• No compliance with the Warnings and/or Instructions may damage the

apparatus and/or its components or injure the operator

• Before selecting any function disconnect the test leads from the circuit

under test

• When the instrument is connected to the tested circuit never touch any

test lead which is not being used

• Avoid to effect resistance measurements in the presence of external

voltages; even though the instrument is protected a too high voltage may

cause malfunctions

• If the symbol is displayed during use interrupt testing and replace

batteries following the procedure described under paragraph Errore.

L'origine riferimento non è stata trovata.. The instrument is capable of

keeping the data stored even though batteries are not installed

1.3. AFTER USE

• When the measurements are completed disconnect the test leads from the circuit

under test and after that switch OFF the instrument

• Remove batteries when the apparatus remains unused for long periods

1.4. MEASURING (OVERVOLTAGE) CATEGORIES DEFINITIONS

The norm IEC/EN61010-1: Safety requirements for electrical equipment for measurement,

control and laboratory use, Part 1: General requirements, defines what measuring

category, usually called overvoltage category, is. On paragraph 6.7.4: Measuring circuits, it

says:

(OMISSIS)

circuits are divided into the following measurement categories:

• Measurement category IV is for measurements performed at the source of the low-

voltage installation.

Examples are electricity meters and measurements on primary overcurrent protection

devices and ripple control units.

• Measurement category III is for measurements performed in the building installation.

Examples are measurements on distribution boards, circuit breakers, wiring, including

cables, bus-bars, junction boxes, switches, socket-outlets in the fixed installation, and

equipment for industrial use and some other equipment, for example, stationary motors

with permanent connection to fixed installation

• Measurement category II is for measurements performed on circuits directly

connected to the low voltage installation.

Examples are measurements on household appliances, portable tools and similar

equipment.

• Measurement category I is for measurements performed on circuits not directly

connected to MAINS.

Examples are measurements on circuits not derived from MAINS, and specially

protected (internal) MAINS-derived circuits. In the latter case, transient stresses are

variable; for that reason, the norm requires that the transient withstand capability of the

equipment is made known to the user.

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