HP 6038A Operating And Service Manual page 2

Autoranging system dc power supply
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The following general safety precautions must be observed during all phases of operation, service, and repair of this instru¬
ment. Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards
of design, manufacture, and intended use of the instrument. Hewlett-Packard Company assumes no liability for the
customer's failure to comply with these requirements.
Verify that the product is set to match the available line
voltage and the correct fuse is installed.
This product is a Safety Class 1 instrument {provided with a
protective earth terminal). To minimize shock hazard, the in¬
strument chassis and cabinet must be connected to an elec¬
trical ground. The instrument must be connected to the ac
power supply mains through a three-conductor power cable,
with the third wire firmly connected to an electrical ground
(safety ground) at the power outlet. For instruments designed
to be harcT-wired to the ac power lines (supply mains), connect
the protective earth terminal to a protective conductor before
any other connection is made. Any interruption of the protec¬
tive (grounding) conductor or disconnection of the protective
earth terminal will cause a potential shock hazard that could
result in personal injury. If the instrument is to be energized via
an external autotransformer for voltage reduction, be certain
that the autotransformer common terminal is connected to the
neutral (earthed pole) of the ac power lines (supply mains).
For instruments without a built-in line switch, the Input power
lines must contain a switch or another adequate means for
disconnecting the instrument from the ac power lines (supply
mains).
This instrument may be equipped with a line filter to reduce
electromagnetic interference and must be connected to a pro¬
perly grounded receptacle to minimize electric shock hazard.
Operation at line voltages or frequencies in excess of those
stated on the data plate may cause leakage currents in excess
of 5.0 mA peak.
WARNING
Instruction manual symbol: the product
will be marked with this symbol when it
is necessary for the user to refer to the
instruction manual (refer to Table of
Contents).
Indicates hazardous voltages.
indicate earth (ground) terminal.
The WARNING sign denotes a hazard. It
calls attention to a procedure, practice,
or the like, which, if not correctly per¬
formed or adhered to, could result in
personal injury. Do not proceed beyond
a WARNING sign until the indicated
conditions are fully understood and met.
Do not operate the instrument in the presence of flammable
gases or fumes.
Operating personnel must not remove instrument covers.
Component replacement and internal adjustments must be
made by qualified service personnel. Do not replace com¬
ponents with power cable connected. Under certain condi¬
tions, dangerous voltages may exist even with the power cable
removed.
To avoid injuries, always disconnect power,
discharge circuits and remove external voltage sources before
touching components.
Do not attempt internal service or adjustment unless another
person, capable of rendering first aid and resuscitation, is
present.
CAUTION
The CAUTION sign denotes a hazard. It
calls attention to an operating pro¬
cedure, or the like, which, if not correct¬
ly performed or adhered to, could result
in damage to or destruction of part or all
of the product. Do not proceed beyond
a CAUTION sign until the indicated con¬
ditions are fully understood and met.
Because of the danger of introducing additional hazards, do
not install substitute parts or perform any unauthorized
modification to the instrument. Return the instrument to a
Hewlett-Packard Sales and Service Office for service and
repair to ensure that safety features are maintained.
Instruments which appear damaged or defective should be made inoperative and secured against unintended operation until
they can be repaired by qualified service personnel.

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