HP 75000 C Series Service Manual page 21

Operating Instructions
3-1. Introduction
This chapter provides operating information for the HP E1426A
Oscilloscope. Included are detailed operator's preventive
maintenance procedures, operating instructions, and operator's
checks. Both preventive maintenance and the operator's checks
should be performed on a regular scheduled basis to keep the
oscilloscope in a n operational condition, and also prevent more
serious malfunctions from occurring.
3-2.
Safet
Y
This paragraph contains information, cautions, and warnings which
Considera ions
must be followed for your protection and to avoid damage to the
equipment when performing preventive maintenance.
Before applying power, verify that the mainframe (the oscilloscope is
installed in) is set
to
match the available line voltage and the correct
fuse is installed. An uninterruptible safety earth ground must be
provided from the main power source to the product input wiring
terminals, power cord, or supplied power cord set.
Warning
Any interruption of the protective (grounding) conductor
(inside or outside the instrument) o r disconnecting the
protective earth terminal will cause a potential shock hazard
that could result in personal injury. (Grounding one
conductor of
a
two conductor outlet is not sufficient
protection.) In addition, verify that a
common ground exists
between the unit under test and this instrument prior to
energizing either unit.
Whenever it is likely that the protection has been impaired,
the instrument must be made inoperative and be secured
against any unintended operation.
If this instrument is to be energized via an autotransformer
(for voltage reduction) make sure the common terminal is
connected to neutral (that is, the grounded side of the mains
supply).
Servicing instructions are for use by service-trained
personnel only. To avoid dangerous electric shock, do not
perform any servicing unless qualified to do so.
Operatlng lnstructlons 3-1