HT instruments HT14N - Manual (Page 3)

HT-14N
EN - 2
1. SAFETY PRECAUTIONS AND PROCEDURES
This apparatus conforms to safety standard EN 61010-1, relating to electronic measuring
instruments.
For your own safety and that of the apparatus, you must follow the procedures described
in this instruction manual and especially read all the notes preceded by the symbol
carefully
.
Take extreme care for the following conditions when measuring:
• Do not measure voltage, current under humid or wet environment.
• Do not operate the meter under the environment with explosive gas (material),
combustible gas (material), steam or filled with dust.
• Keep you insulated from the object waiting for measuring.
• Do not contact any exposed metal (conductive) parts such as end of test lead, socket,
fixing object, circuit, etc.
• If any unusual condition of testing end (metal part) and attachment of the meter such as
breakage, deformation, fracture, foreign substance, no display, etc., do not conduct any
measuring.
• Measuring voltage over 20V.
• When measuring AC power supply, it might cause human body electricity conduction.
The followings symbols are used:
Caution: Refer to the instruction manual. Incorrect use may damage the
apparatus or its components.
Danger high voltage: risk of electric shock.
Meter double insulated.
DC voltage or current.
AC voltage or current.
1.1. PRELIMINARY
• This apparatus has been designed for use in an environment of pollution degree 2.
• It can be used for VOLTAGE measurements on installations of surge voltage category
II (equipment supplied by fixed systems)up to 300 volts.
• You must comply with the usual safety regulations aimed at:
♦ Protecting you against the dangerous electric current.
♦ Protecting the instrument against an incorrect operation.
• Only the leads supplied with the instrument guarantee compliance with the safety
standard. They must be in a good condition and they must be replaced, if necessary
with an identical model.
• Do not test or connect to any circuit with voltage or current exceeding the specified
overload protection.