Introduction; General; 647 Magnet Power Supply Features - Lakeshore 647 User Manual

1.0

GENERAL

This chapter covers Features (Paragraph 1.1), Specifications (Paragraph 1.2), and Operating Characteristics
(Paragraph 1.3).
1.1

647 MAGNET POWER SUPPLY 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 Stability Current Regulation
Analog output control uses a precision shunt for current stabilization to better than 50 PPM of full-scale
current over an 8-hour period.
• ±72 A, ±32 V Output that is Autoranging at up to 2 kVA continuous
Standard display and programming resolution is 10 mA and 10 mV. 1 mA and 1 mV High Resolution
Option is available.
• No current reversal switch is required
Output current reversal is smooth and continuous with excellent near zero current performance.
• Remote and local sensing of the output voltage
Compensates for voltage drops in the output leads.
• Quiet switched-mode design
Results in a highly efficient, lightweight, air-cooled unit.
• Front Panel Graphic Display
Allows continuous display of output while setting parameters from the menu-driven keypad. Operating
parameters that can be set and monitored are:
1. Output current and voltage setting
2. Output current and voltage measurement
3. Output current step limiting
4. Output current zeroing
5. "Soft" current and voltage setting limits
6. Output ramp programming
7. Status reporting
8. Field monitoring (with optional Model 6476 Card)
• Four methods of setting and monitoring all operating parameters:
1. From front panel
2. From remote interfaces
3. Through analog inputs and outputs
• IEEE-488 Interface available.
• Gaussmeter Input Option available.
• Protection
Overvoltage/Quench protection circuits protect against internal overtemperature, AC line fault, and unit
fault. Also includes a Remote Inhibit (RI) and a discrete Fault Indicator (FLT).

Introduction

Lake Shore Model 647 Magnet Power Supply User's Manual
CHAPTER 1
INTRODUCTION
1-1