6 | PSR1A/PSR4A POWER SUPPLY AND PRESSURE/FLOW READOUT
MKS P/N 20068380-001 Rev A
2 Safety Information
2.1 Symbols Used in This Instruction Manual
The following are definitions of WARNING, CAUTION, and NOTE messages used throughout the
manual.
The NOTE sign denotes important information. It calls attention to a
procedure, practice, condition, or the like, which is essential to
highlight.
The CAUTION sign denotes a hazard. It calls attention to an operating
procedure, practice, or the like, which, if not correctly performed or
adhered to, could result in damage to or destruction of all or part of the
product.
The WARNING sign denotes a hazard. It calls attention to a procedure,
practice, condition, or the like, which, if not correctly performed or
adhered to, could result in injury to personnel.
2.2 Symbols Found on the Unit
The following table describes symbols that may be found on the unit.
ON (Supply)
IEC 417, No. 5007
OFF (Supply)
IEC 417, No. 5008
Earth (ground)
IEC 417, No. 5017
Protective Earth
(ground)
IEC 417, No. 5019
Frame or Chassis
IEC 417, No. 5020
Equipotentiality
IEC 417, No. 5021
Direct Current
IEC 417, No. 5031
Alternating Current
IEC 417, No. 5032