HT instruments HT8051 - Manual (Page 3)

HT8051
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 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 contact with exposed metal parts, with unused measuring probes, etc.
 Do not carry out any measurement in case you find anomalies in the instrument such
as deformation, substance leaks, absence of display on the screen, etc.
 Never apply a voltage exceeding 30V between any pair of inputs or between an input
and the grounding in order to prevent possible electrical shocks and any damage to the
instrument.
In this manual, and on the instrument, the following symbols are used:
CAUTION: observe the instructions given in this manual; improper use could
damage the instrument or its components.
Double-insulated meter.
Connection to earth
1.1. PRELIMINARY
INSTRUCTIONS
 This instrument has been designed for use in environments of pollution degree 2.
 It can be used to measure DC VOLTAGE and DC CURRENT.
 We recommend following the normal safety rules devised to protect the user against
dangerous currents and the instrument against incorrect use.
 Only the leads and the accessories 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 voltage limits.
 Do not perform any test under environmental conditions exceeding the limits indicated
in § 6.2.1.
 Check that the battery is correctly inserted.
 Before connecting the leads to the circuit being measured, check that the instrument
has been correctly set in order to prevent any damage to the instrument.