Teradyne Z1800 Series, Руководство оператора

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1-4 SAFETY
Safety Symbols and
Markings
The following symbols appear in various places on the tester to call your attention to
hazards or to indicate that you should consult the manuals for further information.
Safety Symbols
The protective ground symbol is used to define any connection point where a safety ground
wire is added to the hardware. This would normally be any conductive point referenced to
the safety ground wire of the main AC input.
The frame or chassis terminal symbol indicates a connection to the frame (chassis) of the
equipment which normally includes all exposed metal structures.
The remote instrumentation ground symbol indicates grounding for instruments attached to
the tester.
The black high voltage flash symbol indicates any connection where a high voltage, either
AC or DC, from 60 V to 999 V may be present.
The information symbol on hardware indicates that there is important servicing or
operating information in the manual. It appears close to the documented area.
Alternating current (power line).
The red and black danger label calls attention to a high energy
electrical connection or a concealed hazard. Qualified technicians should consult
appropriate manuals before servicing the instrument.
Safety Labels
The warning label above appears near the fixture receiver interface.
• Do not remove fixture receiver covers while a test program is running. Power may be
applied to the fixture receiver, which places you at risk.
•
Keep fingers away from fixture receiver pins.
• Remove rings, watches, bracelets, or any other conductive material you are wearing.
WARNING
Hazardous voltages may be
present on receiver/fixture
Caution
Do not remove or install printed circuit boards
or other subassemblies without first removing
power from that subassembly. Failure to remove
power may result in component damage.
Proper electrostatic discharge precautions
must be observed.
The Caution label appears on the test head cage. Turn off tester power
before removing any printed circuit boards or electrical subassembly,
and observe ESD practices.