4
Digital Transformer Ratiometer DTR
®
Model 8510
1.1 International Electrical Symbols
Signifies that the instrument is protected by double or reinforced insulation.
CAUTION - Risk of Danger! Indicates a WARNING and that the operator must
refer to the user manual for instructions before operating the instrument in all
cases where this symbol is marked.
Risk of electric shock. The voltage at the parts marked with this symbol may
be dangerous.
Ground/Earth
Important instructions to read and understand completely.
Important information to acknowledge.
Battery
Fuse
USB socket
Compliance with the Low Voltage & Electromagnetic Compatibility European
directives (73/23/CEE & 89/336/CEE)
In the European Union, this product is subject to a separate collection system
for recycling electrical and electronic components In accordance with directive
WEEE 2002/96/EC
1.2 Definition of Measurement Categories
CAT II: For measurements performed on circuits directly connected to
the electrical distribution system. Examples are measurements on
householdappliancesorportabletools.
CAT III:
Formeasurementsperformedinthebuildinginstallationatthedistri-
butionlevelsuchasonhardwiredequipmentinxedinstallationand
circuitbreakers.
CAT IV: For measurements performed at the primary electrical supply
(<1000V)suchasonprimaryovercurrentprotectiondevices,ripple
controlunits,ormeters.
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