HP 5501B, Operating And Service Manual, Page: 64 / 120

HP5501B
Service
8-4
8-14. Safety Symbols
8-15. The following safety symbols are used on the instrument or in this manual.
Instruction manual symbol. The product will be marked with
this symbol when it is necessary for the user to refer to the
instruction manual in order to prevent damage to the
instrument.
Protective conductor terminal. For protection against
electrical shock in case of a fault. Used with field wiring
terminals to indicate the terminal that must be connected to
ground before operating the equipment.
Frame and chassis terminal. A connection to the frame
(chassis) of the equipment which normally includes all
exposed metal structures.
Indicates dangerous voltage at input or output terminals
that may exceed 1000 volts.
Low-noise or noiseless, clean ground (earth) terminal. Used
for signal common as well as providing protection against
electrical shock in case of fault. A terminal marked with this
symbol must be connected to ground as described in
Section 2 Installation in this manual before operating the
equipment.
Alternating current.
Direct current.
The WARNING signal denotes a hazard. It calls attention to
a procedure or practice which could result in personal injury
if not adhered to or correctly performed.
The CAUTION signal denotes a hazard. It calls attention to
an operating procedure or practice which could result in
damage or destruction to part of or the entire product if not
adhered to or correctly performed.