HT instruments SOLAR I-V - Manual (Page 6)

I-V400 - SOLAR I-V
EN - 4
1.2. DURING USE
We recommend to carefully read the following recommendations and instructions:
CAUTION
 Failure to comply with the CAUTIONs and/or instructions may damage the
instrument and/or its components or cause dangers to the operator.
 The symbol “
” indicates the charge level. When there are five bars, it
means that batteries are fully charged; a decrease in the number of bars
down to “
” indicates that the batteries are almost low. In this case,
interrupt tests 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 measuring operations are completed, turn off the instrument by pressing and
holding the ON/OFF key for a few seconds. Should the instrument remain unused for a
long time, remove batteries and follow the indications given in § 3.4.
1.4. OVERVOLTAGE CATEGORIES - DEFINITIONS
Standard IEC/EN61010-1 (Safety requirements for electrical equipment for measurement,
control and laboratory use, Part 1: General requirements) defines what a measurement
category (usually called “overvoltage category”) is. At § 6.7.4: Measuring circuits it quotes:
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 in the building installation.
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 norm requires that the transient withstand capability of the
equipment is made known to the user.