HP 5344S Operating Instructions Manual page 9

Model 5344S
Safety Considerations
GENERAL
This is a Safety Class 1 instrument. This instrument has been designed and tested according to IEC
Publication 348, "Safety Requirements for Electronic Measuring Apparatus".
This manual contains information, cautions, and warnings which must be followed by the service
person to ensure safe operation and to retain the instrument in safe condition.
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.
BEFORE SWITCHING ON THIS INSTRUMENT, the protective earth terminals of this instrument
must be connected to the protective conductor of the (mains) power cord. The mains plug shall
only be inserted in a socket outlet provided with a protective earth contact. The protective action
must not be negated by the use of an extension cord (power cable) without a protective
conductor (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 has been impaired, the instrument must
be made inoperative and be secured against any unintended operation.
Any interruption of the protective (grounding) conductor (inside or outside the instrument) or
disconnecting the protective earth terminal is likely to make this instrument dangerous.
Intentional interruption is prohibited.
Warning — These servicing instructions are for use by qualified personnel only. To avoid
dangerous electric shock, do not perform any servicing other than that contained in the
operating instructions unless you are qualified to do so.