Lakeshore Learning Materials 647 - Manual (Page 10)

Lake Shore Model 647 Magnet Power Supply User’s Manual
Forward viii
SAFETY SUMMARY
Observe the following general safety precautions during all phases of operation, service, and repair of this
instrument. Failure to comply with these precautions or with specific warnings elsewhere in this manual
violates safety standards of design, manufacture, and intended use of the instrument. Lake Shore
Cryotronics, Inc. assumes no liability for the customer's failure to comply with these requirements.
Ground the Instrument
To minimize shock hazard, connect the instrument chassis and cabinet to an electrical ground. The
instrument is equipped with a three-conductor AC power cable. Plug this cable into either an approved three-
contact electrical outlet or a three-contact adapter with the grounding wire (green) firmly connected to an
electrical ground (safety ground) at the power outlet. The power jack and mating plug of the power cable
meet Underwriters Laboratories (UL) and International Electrotechnical Commission (IEC) safety standards.
Do Not Operate in an Explosive Atmosphere
Do not operate the instrument in the presence of flammable gases or fumes. Operating any electrical
instrument in such an environment constitutes a definite safety hazard.
Keep Away from Live Circuits
Operating personnel must not remove instrument covers. Refer component replacement and internal
adjustments to qualified maintenance personnel. Do not replace components with power cable connected. To
avoid injuries, always disconnect power and discharge circuits before touching them.
Do Not Substitute Parts or Modify Instrument
Do not install substitute parts or perform any unauthorized modification to the instrument. Return the
instrument to an authorized Lake Shore Cryotronics, Inc. representative for service and repair to ensure that
safety features are maintained.
Dangerous Procedure Warnings
A WARNING heading precedes potentially dangerous procedures throughout this manual. Instructions in the
warnings must be followed.
SAFETY SYMBOLS
! Warns to protect the instrument against damage.
Indicates dangerous voltage (appears on terminals fed by voltage exceeding 1000 volts).
or
Protective conductor terminal. For protection against electrical shock in case of a fault. Used with
field wiring terminals to indicate the terminal to connect to ground before operating equipment.
Low-noise or noiseless, clean ground (earth) terminal. Provides a signal common as well as
protection against electrical shock in case of a fault. Connect a terminal marked with this
symbol to ground as described in the user manual before operating equipment.
or
Frame or chassis terminal. A connection to the frame (chassis) of the equipment which normally
includes all exposed metal structures.
Alternating current (power line).
Direct current (power line).
Alternating or direct current (power line).