Руководство по эксплуатации Lakeshore Learning Materials 622

Руководство по эксплуатации для устройства Lakeshore Learning Materials 622

Устройство: Lakeshore Learning Materials 622
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Краткое содержание
Краткое содержание страницы № 1











User’s Manual
Model 620/622/623/647 Model 620/622/623/647 Model 620/622/623/647 Model 620/622/623/647
Magnet Power Supply





Model 620 – ±50 A, ±5 V Model 623 – ±155 A, ±30 V
Model 622 – ±125 A, ±30 V Model 647 – ±72 A, ±32 V



Lake Shore Cryotronics, Inc.
575 McCorkle Blvd.
Westerville, Ohio 43082-8888 USA

E-Mail Addresses:
sales@lakeshore.com
service@lakeshore.com

Visit Our Website:
www.lakeshore.com

Fax: (614) 891-1392
Telephone: (614) 891-

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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual LIMITED WARRANTY Lake Shore Cryotronics, Inc. (henceforth Lake Shore), the manufacturer, warrants the instrument to be free from defects in material and workmanship for a period of twelve months from the date of shipment. During the warranty period, under authorized return of instruments or component parts to Lake Shore freight prepaid, the company will repair, or at its option replace, any part found to be defective i

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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual TABLE OF CONTENTS Chapter/Paragraph Title Page List of Illustrations ......................................................................................................................................iv List of Tables..............................................................................................................................................iv Foreword ..............................................

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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual TABLE OF CONTENTS (Continued) Chapter/Paragraph Title Page 3.3 Normal Display for Manual Mode ........................................................................................... 3-2 3.4 Normal Display for Manual PSH Control ................................................................................ 3-3 3.5 Normal Display for Automatic PSH Control...........................................................

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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual TABLE OF CONTENTS (Continued) Chapter/Paragraph Title Page 5 ERROR MESSAGES AND TROUBLESHOOTING ...............................................................................5-1 5.0 General...................................................................................................................................5-1 5.1 Software Error Messages ...................................................................

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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual LIST OF ILLUSTRATIONS Figure No. Title Page 1-1 Four-Quadrant Power...................................................................................................................... 1-4 1-2 Comparison of Old and New MPS Designs ..................................................................................... 1-5 2-1 RI, FLT, ON, and OVP Connections ...........................................................

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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual 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 inc

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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Identification of Electrostatic Discharge Sensitive Components Below are various industry symbols used to label components as ESDS: HANDLING ELECTROSTATIC DISCHARGE SENSITIVE COMPONENTS Observe all precautions necessary to prevent damage to ESDS components before attempting installation. Bring the device and everything that contacts it to ground potential by providing a conductive surface and discharge paths. As a min

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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual 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 extingui

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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual SAFETY SYMBOLS Direct current (power line). Equipment protected throughout by Alternating current (power line). double insulation or reinforced insulation (equivalent to Class II of Alternating or direct current (power line). IEC 536 - see annex H). Three-phase alternating current (power line). Caution: High voltages; danger of electric shock. Background color: Earth (ground) terminal. Yellow; Symbol and o

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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual CHAPTER 1 INTRODUCTION 1.0 GENERAL This chapter covers Features (Paragraph 1.1), Specifications (Paragraph 1.2), and Operating Characteristics (Paragraph 1.3). 1.1 FEATURES  True, Four-Quadrant Bidirectional Power Flow: Operate current or voltage as a source or a sink in either positive or negative polarities. Sink power returns to the AC line instead of dissipating through an energy absorber.  Low Noise, High

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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual 1.2 SPECIFICATIONS Below are performance specifications for current with a 1 Henry load and voltage with a resistive load. DC Output: True, Four-Quadrant, Bidirectional Power Flow output. Autoranging current and voltage operate as a source or a sink in either polarity in current or voltage mode. Program current and compliance voltage via the front panel, remote interfaces, or analog input. See Table 1-1 for DC Output S

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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Front Panel: Contains a menu driven keyboard and graphic display for entry and display of results. Operating parameters to set and monitor from the front panel (and remote interface) include:  Output current and compliance voltage setting.  Output current and voltage measurement.  Status reporting.  Output ramp programming.  Persistent switch heater control (with optional Model 6228 Card).  Liquid helium level m

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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Table 1-4. Model 647 DC Output Specifications SPECIFICATION CURRENT VOLTAGE Digital Programming Resolution: 10 mA / 1 mA 10 mV / 1 mV Standard/High Digital Programming Accuracy 0.1% I 1% V MAX MAX Digital Programming Repeatability 0.01% I 0.1% V MAX MAX Electronic Resolution: 4 mA / 1 mA 1 mV / 1 mV Standard/High 0.1% I 0.1% V Electronic Accuracy MAX MAX Display Resolution: Standard/High 10 mA / 1 mA 10

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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Conventional MPS: Consists of a unipolar power supply with an energy absorber to dissipate magnet energy during discharge. The energy absorber prevents reverse voltage generated during the discharge from damaging the unipolar supply output. Other conventional supplies dissipate magnet energy in the power supply output transistor pass-bank. This two-quadrant performance requires the output stage to absorb considerable pow

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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual 1.3.3 Highly Efficient, Air Cooled, Compact Unit Lake Shore MPS: Quiet switched-mode design. The output uses a proprietary pulse width modulated technique that incorporates power hybrid circuitry. Extremely low conduction loss components minimize internal power dissipation. The MPS is not a direct off-line switching supply. The output is fully floating and isolated from ground. Active power factor correction draws a sinu

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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual CHAPTER 2 INITIAL SETUP AND CONNECTIONS 2.1 INSPECTING AND UNPACKING The MPS ships in a special cardboard box with integrated forklift skid openings. Do not stack anything on top of the MPS box. Upon receipt, set the box on a level surface with the pallet side down. Inspect the shipping container for external damage. Make all claims for damage (apparent or concealed) or partial loss of shipment in writing to Lake S

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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual 2.4.1 Power and Ground Requirements The AC power source for the MPS should be frequency and voltage regulated and isolated from sources that may generate Electromagnetic Interference (EMI). The MPS is designed for single-phase 3-wire alternating current (AC) power; do not use two-wire (without ground) AC power. Lake Shore recommends Ground Fault Interrupter (GFI) and Transient Surge Protection circuitry at the AC source.

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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Use this procedure to connect input power to the MPS: 1. Loosen the two connector cover screws and open the cover. 2. Slip the strain relief over the power cable with the flanged end at the end to be terminated. 3. Attach the wires to the connector in accordance with prevailing color codes: green or green/yellow to the “GND” terminal, white or blue to the “N” terminal, and black or brown to the “L” terminal. 4. Position

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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual 2.5.2 Shielding, Grounding, and Noise For noise reduction, tightly twist and shield the leads from the MPS to the magnet. Connect the shield to the MPS chassis as shown in Figure 2-3. WARNING: DO NOT place magnet leads in contact with other MPS/system connections or metal parts. In some instances, the user's measurement leads may pick up noise from the magnet leads. Although this common mode noise may affect the user's


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