HT instruments HT39 - Manual (Page 3)

HT37 - HT39
EN - 2
1. SAFETY PRECAUTIONS AND PROCEDURES
This instrument conforms with safety Standard EN 61010-1 related to electronic measuring
instruments.
For your own safety and to avoid damaging the instrument follow the procedures
described in this instruction manual and read carefully all notes preceded by this symbol
.
When taking measurements:
• Avoid doing that in humid or wet places.
• Avoid doing that in rooms where explosive gas, combustible gas, steam or excessive
dust is present.
• Keep you insulated from the object under test.
• Do not touch exposed metal parts such as test lead ends, sockets, fixing objects,
circuits etc.
• Avoid doing that if you notice anomalous conditions such as breakages, deformations,
fractures, leakages of battery liquid, blind display etc.
• Be particularly careful when measuring voltages exceeding 20V to avoid risks of
electrical shocks.
The following symbols are used:
CAUTION - refer to the instruction manual - an improper use may damage the
instrument or its components.
Danger high voltage: risk of electric shock.
Double insulated meter.
AC voltage or current.
DC voltage or current.
1.1. PRELIMINARY
• This instrument has been designed for use in environments of pollution degree 2.
• It can be used for VOLTAGE and CURRENT measurements on installations of
overvoltage category III 1000V and IV 600V.
• When using the instrument always respect the usual safety regulations aimed at:
♦ Protecting you against the dangerous electric currents.
♦ Protecting the instrument against incorrect operations.
• Only the leads supplied with the instrument guarantee compliance with the safety
standards in force. They must be in good conditions and, if necessary, replaced with
identical ones.
• Do not test or connect to any circuit exceeding the specified overload protection.
• Do not effect measurements under environmental conditions exceeding the limits
indicated in paragraph 6.2.1.