HT HT9020, User Manual

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HT9020
EN - 2
1. PRECAUTIONS AND SAFETY MEASURES
The instrument has been designed in compliance with directive IEC/EN61010-1 relative to
electronic measuring instruments. For your safety and in order to avoid damaging the
instrument, please carefully follow the procedures described in this manual and read all
notes preceded by the symbol
paying the utmost attention.
Before and after carrying out measurements, carefully observe the following instructions:

Do not carry out any voltage or current measurement in humid environments

Do not carry out any measurement in case of gas, explosive and inflammable materials
or dusty environments

Avoid contact with the circuit under test if no measurement is carried out

Avoid contact with exposed metal parts, with unused measuring probes, circuits, etc.

Do not carry out any measurement in case of instrument’s anomalies such as
deformation, breaks, substance leaks, absence of displayed screen, etc.

Pay special attention when measuring voltages higher than 20V, since a risk of
electrical shock exists
The following symbols are used in this manual and on the instrument:
CAUTION: observe the instructions given in this manual; an improper use could
damage the instrument or its components.
High voltage danger: electrical shock hazard.
Double-insulated meter
AC voltage or current
DC voltage or current
Connection to earth
1.1. PRELIMINARY INSTRUCTIONS

This clamp has been designed for use in environments of pollution degree 2.

It can be used for
CURRENT
and
VOLTAGE
measurements on installations with
measurement category CAT IV 600V and CAT III 1000V. For a definition of
measurement categories, see § 1.4.

We recommend to follow the standard safety rules devised by the procedures for
carrying out operations on live systems and using the prescribed PPE to protect the
user against dangerous currents and the instrument against incorrect use.

Only the leads supplied with the instrument guarantee compliance with the safety
standards. They must be under good conditions and replaced with identical models,
when necessary.

Do not test circuits exceeding the specified current and voltage limits.

Check that the battery is correctly inserted.

Before connecting the test leads to the circuit under test, make sure that the switch is
correctly set.

Make sure that the LCD display and the switch indicate the same function.