HT instruments HT4011 - Manual (Page 3)

HT4011
EN – 2
1. PRECAUTIONS AND SAFETY MEASURES
The instrument has been designed in compliance with directive IEC/EN61010-1 relevant to
electronic measuring instruments. For your safety and in order to prevent damaging the
instrument, please carefully follow the procedures described in this manual and read all
notes preceded by the symbol
with the utmost attention.
Before and after carrying out the measurements, carefully observe the following
instructions:
 Do not carry out any voltage or current measurement in humid environments.
 Do not carry out any measurements in case gas, explosive materials or flammables are
present, or in dusty environments.
 Avoid any contact with the circuit being measured if no measurements are being
carried out.
 Avoid any contact with exposed metal parts, with unused measuring probes, circuits,
etc.
 Do not carry out any measurement in case you find anomalies in the instrument such
as deformation, breaks, substance leaks, absence of display on the screen, etc.
 Pay special attention when measuring voltages higher than 20V, since a risk of
electrical shock exists.
In this manual, and on the instrument, the following symbols are used:
Warning: observe the instructions given in this manual; improper use could
damage the instrument or its components.
High voltage danger: electrical shock hazard.
Double-insulated meter.
AC voltage or current
DC voltage
Connection to earth
1.1. PRELIMINARY INSTRUCTIONS
 This instrument 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 III 600V. For a definition of measurement categories, see
§ 1.4
 We recommend following the normal safety rules devised 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 in 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 to be tested, make sure that the switch is
correctly set.
 Make sure that the LCD display and the switch indicate the same function.