HP 3457A Service Manual page 4

HEWLETT
PACKARD
Operating and Safety Symbols
Symbols Used On Products And In Manuals
-
LINE
4
A A
ATTENTION
Statlc Sensltwe
AC line voltage input receptacle.
Instruction manual symbol affixed to product. Cautions the user t o refer to
respective instruction manual procedures to avoid possible damage to the
product.
Indicates dangerous voltage
-
terminals connected t o interior voltage
exceeding 1000 volts.
Protective conductor terminal. Indicates the field wiring terminal that must
be connected to earth ground before operating equipment
-
protects against
electrical shock in case of fault.
Clean ground (low-noise). Indicates terminal that must be connected to
earth ground before operating equipment
-
for single common connections
and protection against electrical shock in case of fault.
Frame or chassis ground. Indicates equipment chassis ground
terminal
-
normally connects to equipment frame and all metal parts
Affixed to product containing static sensitive devices
-
use anti-static
handling procedures t o prevent electrostatic discharge damage to
components.
NOTE
NOTE
Calls attention to a procedure, practice, or condition that requires special
attention by the reader.
CAUTION
CAUTION
Calls attention to a procedure, practice, or condition that could possibly
cause damage to equipment or permanent loss of data.
WARNING
WARNING
Calls attention to a procedure, practice, or condition that could possibly
cause bodily injury or death.