Safety; Grounding; Line Voltage - HP 4935A Operating And Service Manual

SAFETY

If this instrument is to be energized via an autotransformer
for voltage reduction, make sure the common terminal is
connected to the earthed pole of the power source.
B E F O R E S W I T C H I N G
p r o t e c t i v e e a r t h t e r r n i n a l s o f t h i s i n s t r u m e n t m u s t b e
c o n n e c t e d t o t h e p r o t e c t i v e c o n d u c t o r o f t h e ( m a i n s )
power cord. The rnains plug shall only be inserted in a
socket outlet provided with a protective earth contact. The
p r o t e c t i v e actlon m u s t n o t b e n e g a t e d b y u s e o f a n
extension cord (power cable)
ductor

(grounding).

Make sure that only fuses with the required rated current
and of the specified type (normal blow, time delay, etc.)
are used for replacement. The use of repaired fuses and the
short-circuiting of fuse holders must be avoided.
Whenever It is likely that the protection offered by fuses
h a s b e e n i m p a i r e d , t h e
inoperative a n d b e s e c u r e d a g a i n s t a n y u n i n t e n d e d
operation.
LINE VOLTAGE
B E F O R E S W I T C H I N G O N T H I S I N S T R U M E N T , m a k e
sure instrument requirements
power source.
GROUNDING
B E F O R E S W I T C H I N G O N T H I S I N S T R U M E N T , e n s u r e
that all devices connected to this instrument are connected
to the protective (earth) ground.
ii
O N T H I S I N S T R U M E N T ,
without a protective
i n s t r u m e n t m u s t b e
match the voltage
GROUNDING
Any interruption
(inside or outside
protective e a r t h t e r m i n a l c a n
dangerous. Intentional
t h e
HIGH VOLTAGE
Any adjustment,
con-
instrument under voltage should be avoided as much as
possible and, when inevitable, should be carried out only by
a skilled person who is aware of the hazard involved.
Capacitors inside the instrument may still be charged even
if the instrument has been disconnected from its source of
Adjustments
m a d e with power
covers are removed. Energy available at many points, if
contacted, result in personal injury.
B E F O R E S W I T C H I N G O N T H I S I N S T R U M E N T , e n s u r e
t h a t t h e l i n e p o w e r ( m a i n s ) p l u g i s c o n n e c t e d t o a
three-conductor
of the
( e a r t h ) g r o u n d . ( G r o u n d i n g o n e c o n d u c t o r o f a two-
conductor outlet is not sufficient.)
of the protective (grounding)
the instrument) or
m a k e
interruption is prohibited.
maintenance, and repair
and service described herein
supplied to the instrument
line power outlet that
Model 4YXA
conductor
disconnecting the
t h i s i n s t r u m e n t
of the opened
are performed
while protective
has a protective