TDS 520A, 524A, 540A, & 544A Service Manual
2Ć7
General Information
!
"
!
WARNING
AC POWER SOURCE AND CONNECTION. The
" operate from a singleĆphase
power source. It has a threeĆwire power cord and twoĆpole,
threeĆterminal grounding type plug. The voltage to ground (earth)
from either pole of the power source must not exceed the maximum
rated operating voltage, 250 volts.
Before making connection to the power source, be sure the
TDS 520A, 524A, 540A, or 544A has a suitable twoĆpole,
threeĆterminal groundingĆtype plug.
GROUNDING. This instrument is safety Class 1 equipment (IEC
designation). All accessible conductive parts are directly connected
through the grounding conductor of the power cord to the grounded
(earthing) contact of the power plug.
WARNING
The power input plug must be inserted only in a mating receptacle
with a grounding contact where earth ground has been verified by a
qualified service person. Do not defeat the grounding connection.
Any interruption of the grounding connection can create an electric
shock hazard.
For electric shock protection, the grounding connection must be
made before making connection to the instrument's input or output
terminals.
Supplying Operating
Power
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