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PVCHECK
4
1.2.
DURING USE
Please carefully read the following recommendations and instructions:
CAUTION
Failure to comply with the caution notes and/or instructions may damage the
instrument and/or its components or be a source of danger for the operator.
The symbol “
” indicates a full charge level of the internal batteries. When
battery charge decreases
to a minimum level, the symbol “
” appears on the
display. In this case, stop testing and replace the batteries according to the
indications given in § 9.2
The instrument is capable of keeping data stored even without batteries.
1.3.
AFTER USE
When measurements are completed, turn off the instrument by pressing and holding the ON/OFF
key for some seconds. If the instrument is not to be used for a long time, remove the batteries and
follow the instructions given in § 3.4
1.4.
DEFINITION OF MEASUREMENT (OVERVOLTAGE) CATEGORY
Standard “IEC/EN61010-1: Safety requirements for electrical equipment for measurement, control
and laboratory use, Part 1: General requirements” defines what measurement category, commonly
called overvoltage category, is. § 6.7.4: Measured circuits, reads:
Circuits are divided into the following measurement categories:
Measurement category IV
is for measurements performed at the source of the low voltage
installation
Examples are electricity meters and measurements on primary overcurrent protection devices
and ripple control units.
Measurement category III
is for measurements performed on installations inside buildings
Examples are measurements on distribution boards, circuit breakers, wiring, including cables,
bus-bars, junction boxes, switches, socket-outlets in the fixed installation, and equipment for
industrial use and some other equipment, for example, stationary motors with permanent
connection to fixed installation.
Measurement category II
is for measurements performed on circuits directly connected to the
low-voltage installation
Examples are measurements on household appliances, portable tools and similar equipment.
Measurement category I
is for measurements performed on circuits not directly connected to
MAINS
Examples are measurements on circuits not derived from MAINS, and specially protected
(internal) MAINS-derived circuits. In the latter case, transient stresses are variable; for that
reason, the standard requires that the transient withstand capability of the equipment is made
known to the user.
Summary of Contents for PVCHECK
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Page 2: ...PVCHECK 2 PVCHECK...
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