HT Italia IMP57, Руководство пользователя

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IMP57
EN - 3
1.2. DURING USE
Carefully read the following recommendations and instructions:
WARNING
No compliance with the Warnings and/or Instructions may damage the
apparatus and/or its components or injure the operator.

When the instrument is connected to the tested circuit never touch any test lead which
is not being used.

The STATUS LED blinking in red indicates that the instrument is overheating. You will
have to wait until STATUS LED get back to GREEN status before executing new test.

Never execute more than 50 test in one hour.

The red colour (fixed) of STATUS LED indicates a dangerous situation. Disconnect
immediately Test Leads from the Circuit under Test.
1.3. AFTER
USE

Always disconnect alligator clips from the circuit under Test before disconnecting Test
cables from Instrument's inputs.
1.4. DEFINITION OF MEASURING (OVERVOLTAGE) CATEGORY
The norm EN 61010: Safety requirements for electrical equipment for measurement,
control and laboratory use, Part 1: General requirements, defines what a measuring
category, usually called overvoltage category, is.
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.