AEMC 8500 - 1 Introduction; International Electrical Symbols

Digital Transformer Ratiometer DTR
®
Model 8500 3
CHAPTER 1
INTRODUCTION
WARNING
These safety warnings are provided to ensure the safety of personnel
and proper operation of the instrument.
• Readtheinstructionmanualcompletelyandfollowallsafetyinfor-
mation before attempting to use or service this instrument.
• TheDigitalTransformerRatiometerDTR
®
Model 8500 is designed
for use on non-energized (“dead”) transformers only. Make sure
the test sample is completely disconnected from AC power and is
fully discharged.
• OnlyqualiedpersonnelshouldusetheModel8500.
• TheDTR
®
must not be used in a manner in which any of its com-
ponents (including test cables) are relied upon to provide protec-
tion from electric shock. No high voltage insulation/protection is
provided by any component of the DTR
®
. Always make sure the
circuit is fully discharged before attaching any test cables.
• Donottouch,adjust,orrepositiontestcableswhiletheDTR
®
is
conducting a test.
• Usecautiononanyapparatus:potentiallyhighvoltagesandcur-
rents may be present and pose a shock hazard.
• Safetyistheresponsibilityoftheuser.
• Neveropentheinstrumentwhile itisconnectedtoACpoweror
when test cables are connected to transformers, equipment,
circuits, etc.
1.1 International Electrical Symbols
Thissymbolsigniesthattheinstrumentisprotectedbydoubleor
reinforcedinsulation.Useonlyspeciedreplacementpartswhen
servicing the instrument.
This symbol on the instrument indicates a WARNING and that
the operator must refer to the user manual for instructions before
operating the instrument.
Risk of electric shock. The voltage at the parts marked with this
symbol may be dangerous.