HT instruments HT4022 - Manual (Page 35)

HT4020 - HT4022
EN - 2
1. SAFETY PRECAUTIONS AND PROCEDURES
This instrument has been designed in compliance with IE/EN61010-1 directive. For your
own safety and to avoid damaging the instrument we suggest you follow the procedures
hereby prescribed and to read carefully all the notes preceded by the symbol
.
CAUTION
Should you fail to keep to the prescribed instructions you could damage the
instrument and/or its components or endanger your safety.
Take extreme care of the following conditions while taking measurements:
 Do not measure voltage or current in humid or wet environments.
 Do not use the clamp in the presence of explosive gas (material), combustible gas
(material), steam or dust.
 Do not touch the circuit under test if no measurement is being taken;
 Do not touch exposed metal parts, unused terminals, circuits and so on;
 Do not use the instrument if it seems to be malfunctioning (i.e. if you notice
deformations, breaks, leakage of substances, absence of segments on the display and
so on);
 Be careful when you measure voltages exceeding 20V as you may risk electrical
shocks.
 Take care not to allow your hand to pass over the safety guard (see Fig. 1, pos.2) on
current measurements and voltage measurements using the holster.
The following symbols are used:
Caution: refer to the instruction manual. An incorrect use may damage the tester
or its components
High voltage danger: risk of electric shocks
Double insulated meter
AC voltage or current
DC voltage or current
1.1. PRELIMINARY
INSTRUCTIONS
 This instrument has been designed for use in environments of pollution degree 2
 It can be used for CURRENT measurements on installations of measurement CAT III
600V (voltage between phase and to ground) and for VOLTAGE and FREQUENCY
measurements on installations of CAT III 600V (voltage between terminals and
between phase and to ground)
 Please use the standard safety precautions aimed at protecting you against dangerous
electric currents and protecting the instrument against incorrect operations
 Only the leads supplied with the instrument guarantee compliance with the safety
standards. They must be in good condition and, if necessary, be replaced with identical
 Do not test circuits exceeding the current and voltage limits.
 Do not perform any test under conditions exceeding the limits indicated in § 6.2.1
 Assure the batteries are installed correctly
 Before connecting the test leads to the circuit to be tested, make sure that the rotary
selector switch is set to the correct function.
 Make sure that the LCD and rotary selector switch indicate the same function.