HT instruments HT4012 - Manual (Page 28)

HT4012
EN - 3
1.1. PRELIMINARY
• This apparatus has been designed for use in an environment of pollution degree 2.
• It can be used for CURRENT and VOLTAGE measurements on installations of surge
voltage category III up to 600 V, voltage between Phase and Earth (fixed installations)
and for current measures up to 400A.
• This meter is not available for non-sine wave AC signal.
• 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.
• Do not perform any test with environmental condition exceeding the limits indicated in
paragraphs 6.2.1.
• Check if the batteries are installed correctly.
• Prior to connecting the test probes to the installation, check that the function selector is
positioned on the required measurement.
• Check if the LCD and the range indicator show the same as the function desired.
1.2. DURING USE
Read the recommendation which follow and the instruction in this manual:
WARNING
Non compliance with the warnings and/or the instructions for use may
damage the apparatus and/or its components or injure the operator.
• When changing range, first remove the tested conductor or electrical circuit from the
clamp jaw in order to avoid any accident.
• When the apparatus is connected to the measuring circuits, never touch an unused
terminal.
• When measuring resistor, please do not add any voltage. Though there is a protection
circuit, excessive voltage will still cause malfunction.
• When measuring current, first remove the test leads of common and voltage-
resistance.
• When measuring current, any strong current nears or closes to the clamp jaw will affect
the accuracy.
• When measuring current, always put the tested conductor in the center of the clamp
jaw so as to obtain a more accurate reading as referred into paragraph 4.1.2.
• During measuring, if the value of reading or indication of sign remain unchanged, check
if the HOLD function is active.
1.3. AFTER USE
• Once the measurements are completed, turn the rotary switch to OFF.
• If the instruments is not be used for a long period, remove the battery.