© PCE Instruments
2
•
Before making resistance measurements or testing acoustic continuity, disconnect the
circuit from the main power supply and all loads from the circuit.
•
Non-observance of the safety notes can cause damage to the device and injuries to
the user.
We do not assume liability for printing errors or any other mistakes in this manual.
We expressly point to our general guarantee terms which can be found in our general terms of
business.
If you have any questions please contact PCE Instruments. The contact details can be found at
the end of this manual.
1.1
Safety symbols
This symbol can appear next to another symbol, device or connection and
indicates the user must refer to the manual for important safety information.
This WARNING symbol indicates a potentially hazardous situation which, if
not avoided, could result in death or serious injury.
This CAUTION symbol indicates a potentially hazardous situation which, if
not avoided, may result in damage to the product.
Indicates the terminal(s) so marked must not be connected to a circuit where
the voltage with respect to earth ground exceeds 1000 VAC or VDC.
This symbol adjacent to one or more terminals identifies them as being
associated with ranges that may, in normal use, be subject to particularly
hazardous voltages. For maximum safety, the meter and its test leads should
not be handled when these terminals are energized.
Equipment is protected by double or reinforced insulation.
1.2
IEC1010 overvoltage installation categories
OVERVOLTAGE CATEGORY I
Equipment of
OVERVOLTAGE CATEGORY I
is equipment for connection to circuits in which
measures are taken to limit the transient overvoltages to an appropriate low level.
Note-
Examples include protected electronic circuits.
OVERVOLTAGE CATEGORY II
Equipment of
OVERVOLTAGE CATEGORY II
is energy-consuming equipment to be supplied
from the fixed installation.
Note-
Examples include household, office, and laboratory appliances.
OVERVOLTAGE CATEGORY III
Equipment of
OVERVOLTAGE CATEGORY III
is equipment in fixed installations.
Note-
Examples include switches in the fixed installations and some equipment for industrial use
with permanent connection to the fixed installation.
OVERVOLTAGE CATEGORY IV
Equipment of
OVERVOLTAGE CATEGORY IV
is for use at the origin of the installation.
Note-
Examples include electricity meters and primary over-current protection equipment.
Содержание PCE-ITM 20
Страница 4: ......
