Lakeshore Learning Materials 622 - Manual (Page 7)

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual
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FOREWORD
PURPOSE AND SCOPE
This manual contains user instructions for the Model 620/622/623/647 Magnet Power Supply (MPS). Lake
Shore Cryotronics, Inc. designed, manufactures, and assembles the MPS in the United States of America.
We welcome your comments concerning this manual. Although every effort has been made to keep it free of
errors, some may occur. To report a specific problem, please describe it briefly and include the manual title,
revision number, date, the paragraph/figure/table number, and the page number. Send comments to Lake
Shore Cryotronics, Inc. Attn: Technical Publications, 575 McCorkle Blvd., Westerville, Ohio 43082-8888.
HARDWARE COVERED
The MPS is available in the following configurations:
Model 620: ±50 A, ±5 V, 250 VA Model 623: ±155 A, ±30 V, 1 kVA
Model 622: ±125 A, ±30 V, 1 kVA Model 647: ±72 A, ±32 V, 2 kVA
Page A of this manual (following the title page) details the options installed in your unit. See Chapter 6 for
detailed definitions of hardware configurations.
WARNINGS, CAUTIONS, AND NOTES
Warnings, cautions, and notes appear throughout this manual and precede the step to which they pertain.
Multiple warnings, cautions, or notes are bulleted.
WARNING: An operation or maintenance procedure which, if not strictly observed, may result in
injury, death, or long-term health hazards to personnel.
CAUTION: An operation or maintenance procedure which, if not strictly observed, may result in
equipment damage, destruction, or loss of effectiveness.
NOTE: Emphasizes an operation or maintenance procedure.
GENERAL INSTALLATION PRECAUTIONS
These recommended general safety precautions are unrelated to any specific procedure and do not appear
elsewhere in this manual. Personnel should understand and apply these precautions during installation.
Installation personnel shall observe all safety regulations at all times. Keep away from live circuits. Turn off
system power before making or breaking electrical connections. Regard any exposed connector, terminal
board, or circuit board as a possible shock hazard. Discharge charged components only when such grounding
cannot damage equipment. If a test connection to energized equipment is required, make the test equipment
ground connection before probing the voltage or signal.
Do not install or service equipment alone. Do not under any circumstances reach into or enter any enclosure
to service or adjust equipment without the presence or assistance of another person able to render aid.
ELECTROSTATIC DISCHARGE
Electrostatic Discharge (ESD) may damage electronic parts, assemblies, and equipment. ESD is a transfer of
electrostatic charge between bodies at different electrostatic potentials caused by direct contact or induced by
an electrostatic field. The low-energy source that most commonly destroys Electrostatic Discharge Sensitive
(ESDS) devices is the human body, which generates and retains static electricity. Simply walking across a
carpet in low humidity may generate up to 35,000 volts of static electricity.
Current technology trends toward greater complexity, increased packaging density, and thinner dielectrics
between active elements, which results in electronic devices with even more ESD sensitivity. Some electronic
parts are more ESDS than others. ESD levels of only a few hundred volts may damage electronic components
such as semiconductors, thick and thin film resistors, and piezoelectric crystals during testing, handling, repair,
or assembly. Discharge voltages below 4000 volts cannot be seen, felt, or heard.