T2000-T2100
EN – 3
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.
Operate the clamp lever twice before switching on the instrument, to make sure that the
clamp jaws are completely closed.
When switching on the instrument, DO NOT operate the clamp lever and do not clamp
any cable.
Avoid measuring resistance if external voltages are present. Even if the instrument is
protected, excessive voltage could cause malfunctions.
During current measurement (T2000), any other current near the clamp may affect
measurement precision.
When measuring current (T2000), always put the conductor as near as possible to the
middle of the clamp jaw, to obtain the most accurate reading.
While measuring, if the value of the quantity being measured remains unchanged, check
if the HOLD function is enabled.
CAUTION
If the symbol “
” is displayed during use, interrupt testing, disconnect the
instrument from the system, switch off the instrument and replace its batteries
(see § 5.2).
1.3. AFTER
USE
When measurements are completed, switch off the instrument by pressing the
multifunction key
“1”
(see § 4.4).
If the instrument is not to be used for a long time, remove the batteries.
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.
