5
Symbols and Terms in The Manual
Symbols :
:
Caution, Risk of Danger.
Warning :
Identifies hazardous conditions and actions that could cause
BODILY HARM
or
DEATH
Caution :
Identifies conditions and actions that could
DAMAGE
the
meter or equipment under test.
:
Fuse.
Terms :
CAT
Level
:
Over Voltage Category Level defines at which circuit level masure-
ments may be safely made. Different category circuits have different high-voltage
transients.
PER IEC 1010 OVERVOLTAGE INSTALLATION CATEGORY OVERVOLTAGE
CATEGORY
Ⅰ
Equipment of
OVERVOLTAGE CATEGORY
Ⅰ
is equipment for connection to
circuits in which measurements are taken to limit the transient overvoltage 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 a fixed installation.
OVERVOLTAGE CATEGORY
Ⅲ
Equipment of
OVERVOLTAGE CATEGORY
Ⅲ
is equipment in fixed installa-
tions. Note examples include switches in a fixed installation and some equipment
for industrial use with permanent connection to the fixed installation.
OVERVOLTAGE CATEGORY
Ⅳ
Equipment of
OVERVOLTAGE CATRGORY
Ⅳ
is for use at the origin of the
installations. Note examples include electricity meters and primary over-current
protection equipment.
PER IEC1010 Pollution degree
POLLUTION
Addition of foreign matter, solid, liquid or gaseous (ionized gases), that may
produce a reduction of dielectric strength or surface resistively.
POLLUTION degree
For the purpose of evaluating spacing of this product, the following degrees of
POLLUTION in the microenvironment are defined.
Safety
