Table of Contents
Advertisement
MAGNET QUENCHES
For protection during a magnet quench, fit the dewar with pressure relief valves of sufficient size and
pressure rating to allow the helium gas to escape and to prevent excessive pressure in the dewar. Operating
a magnet in a dewar without proper pressure relief is dangerous and possibly life-threatening. The magnet
may transfer tremendous energy to the cryogen during a quench. Consult both the magnet and dewar
manufacturers to check pressure relief valve sufficiency.
DANGEROUS VOLTAGES
High voltages are present inside the MPS. Never attempt to service the MPS. Refer all service to qualified
personnel. There are no user-serviceable parts inside the MPS.
The MPS current output terminals may be dangerous. Although MPS output voltage is limited to ±40 VDC, a
catastrophic failure inside the MPS could pass lethal voltages to the output terminals. Do not touch the
terminals during MPS operation.
BEFORE YOU OPERATE THE EQUIPMENT
Train personnel in proper emergency measures such as electrical power shut off, fire department notification,
fire extinguishing, and personnel and records evacuation. Here is a list of suggested personnel safety
considerations:
•
Ground Fault Interrupter (GFI) AC circuits
•
Fire Extinguisher
•
Magnetic Field Warnings
•
Emergency Lighting
Locate in the immediate vicinity fire extinguisher(s) that extinguish all three classes of fires: A, B, and C.
Class A is ordinary combustibles like wood, paper, rubber, many plastics, and other common materials that
burn easily. Class B is flammable liquids like gasoline, oil, and grease. Class C is energized electrical
equipment including wiring fuse boxes, circuit breakers, machinery, and appliances. Do not use chemical
extinguishers even though they are less expensive and cover all classes of fires. They may damage
electronic equipment. Use a Carbon Dioxide or Halon fire extinguisher.
During the planning stage, consult local experts, building authorities, and insurance underwriters on locating
and installing sprinkler heads, fire and smoke sensing devices, and other fire extinguishing equipment.
Even where not required by code, install some type of automatic, battery-operated emergency lighting in case
of power failure or fire.
Forward
Lake Shore Model 647 Magnet Power Supply User's Manual
vii
Advertisement
Table of Contents
