937B Controller Instruction Manual
pg. 5
1
Safety Information
1.1 Symbols Used in this Manual and their definitions
CAUTION:
Risk of electrical shock.
CAUTION:
Refer to manual. Failure to read message could result
in personal injury or serious damage to the equipment or both.
CAUTION:
Hot surface.
Calls attention to important procedure, practice, or conditions.
Failure to read message could result in damage to the equipment.
1.2 Safety Precautions
The following general safety precautions must be observed during all phases of operation of this
instrument. Failure to comply with these precautions or with specific warnings elsewhere in this manual
violates safety standards for the intended use of the instrument and may impair the protection provided by
the equipment. MKS I
nstruments, Inc. assumes no liability for the customer’s failure to comply with these
requirements.
Properly Ground the Controller.
This product is grounded through the grounding conductor of the power cord. To avoid electrical shock,
plug the power cord into a properly wired receptacle before connecting it to the product input terminals. A
protective ground connection through the grounding conductor in the power cord is essential for safe
operation.
Upon loss of the protective-ground connection, all accessible conductive parts (including knobs and
controls that may appear to be insulating) can render an electrical shock.
All components of a vacuum system used with this or any similar high voltage product must be
maintained at Earth ground for safe operation
. Be aware, however, that grounding this product does
not guarantee that other components of the vacuum system are maintained at earth ground. Connecting
the power cable only to a properly grounded outlet is necessary but not sufficient for safe operation of a
vacuum system with this or any similar high voltage producing product. Verify that the vacuum port to
which the sensors are mounted is electrically grounded.