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PCE instruments PCE-HDM 20 Manual

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© PCE Instruments
2
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 adjacent to another symbol, terminal or operating device
indicates that the operator must refer to an explanation in the user manual to
avoid personal injury or damage to the meter.
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.
This symbol advises the user that the terminal(s) so marked must not be
connected to a circuit point at which the voltage with respect to earth ground
exceeds (in this case) 1000 VAC or VDC.
This symbol adjacent to one or more terminals identifies them as being
associated with ranges that may, under 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.
This symbol indicates that a device is protected throughout by double
insulation 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.
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