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HT Instruments XL421 Manual De Instrucciones página 21

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1. SAFETY PRECAUTIONS AND PROCEDURES
This instrument has been designed in compliance with IEC/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
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 perform any measurement in humid or wet environments.
• Do not use the instrument in 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 use the instrument if it seems to be malfunctioning (i.e. if you notice
deformations, breaks, leakage of substances and so on).
The herewith symbols are used:
Caution: refer to the instruction manual; an improper use may damage the
instrument or its components
Danger high voltage: risk of electrical shocks
De-energize the plant under test before connecting the instrument
Double insulated instrument
AC voltage and current
1.1 PRELIMINARY INSTRUCTIONS
• It can be used for CURRENT measurements up to 2500A on installations with
overvoltage category CAT III 1000V∼ to ground or CAT IV 600V∼ to ground.
• Please use the standard safety precautions aimed at protection against dangerous
electric currents and protect the instrument against incorrect operations
• Do not test circuits exceeding the current and voltage limits.
• De-energize the plant under test before connecting the instrument. Take all the safety
precautions before taking actions on the plant.
• Do not perform any test under environmental conditions exceeding the limits indicated
in this manual (see § 10.3).
• Make sure that batteries are correctly installed.
• Only the accessories supplied with the instrument guarantee compliance with the
safety standards. They must be in good conditions and must be replaced, if necessary,
with identical models.
CAUTION
EN - 2
XL421 - XL422
.

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Xl422