Lake Shore Model 642 Electromagnet Power Supply User’s Manual
vi
Table of Contents
TABLE OF CONTENTS (Continued)
Chapter/Section Title
Page
4 OPERATION........................................................................................................................................................... 4-1
4.0 GENERAL ............................................................................................................................................. 4-1
4.1 TURNING
POWER ON ......................................................................................................................... 4-1
4.2 DISPLAY
DEFINITION.......................................................................................................................... 4-2
4.3 LED
ANNUNCIATORS.......................................................................................................................... 4-2
4.3.1 Fault LED........................................................................................................................................... 4-2
4.3.2 Compliance LED................................................................................................................................ 4-2
4.3.3 Power
Limit LED ................................................................................................................................ 4-2
4.3.4 Ramping LED .................................................................................................................................... 4-2
4.3.5 Remote LED ...................................................................................................................................... 4-2
4.4 KEYPAD
DEFINITION .......................................................................................................................... 4-3
4.4.1 General
Keypad Operation ................................................................................................................ 4-4
4.5 DISPLAY SETUP .................................................................................................................................. 4-4
4.6 SETTING
OUTPUT CURRENT ............................................................................................................ 4-4
4.7 CURRENT
RAMP RATE....................................................................................................................... 4-5
4.8 RAMP
SEGMENTS............................................................................................................................... 4-5
4.9 PAUSE
RAMP....................................................................................................................................... 4-6
4.10 ZERO
OUTPUT .................................................................................................................................... 4-6
4.11 MAXIMUM
SETTING LIMITS................................................................................................................ 4-7
4.11.1 Maximum
Output Current .................................................................................................................. 4-7
4.11.2 Maximum
Current Ramp Rate ........................................................................................................... 4-7
4.12 MAGNET WATER ................................................................................................................................. 4-8
4.13 INTERNAL WATER............................................................................................................................... 4-8
4.14 ERROR
STATUS DISPLAY .................................................................................................................. 4-8
4.15 EXTERNAL
CURRENT PROGRAMMING ............................................................................................ 4-9
4.16 LOCKING THE KEYPAD ...................................................................................................................... 4-9
4.17 COMPUTER INTERFACE .................................................................................................................. 4-10
4.17.1 Changing
Serial Baud Rate ............................................................................................................. 4-10
4.17.2 Changing
IEEE-488
Interface parameters ....................................................................................... 4-11
4.18 DEFAULT
PARAMETER VALUES...................................................................................................... 4-11
5 COMPUTER
INTERFACE OPERATION ................................................................................................................ 5-1
5.0 GENERAL ............................................................................................................................................. 5-1
5.1 IEEE-488
INTERFACE.......................................................................................................................... 5-1
5.1.1 Changing
IEEE-488
Interface Parameters......................................................................................... 5-2
5.1.2 Remote/Local Operation.................................................................................................................... 5-2
5.1.3 IEEE-488
Command Structure .......................................................................................................... 5-2
5.1.3.1 Bus
Control Commands ................................................................................................................. 5-3
5.1.3.2 Common Commands ..................................................................................................................... 5-3
5.1.3.3 Device
Specific Commands ........................................................................................................... 5-3
5.1.3.4 Message Strings ............................................................................................................................ 5-3
5.1.4 Status System ................................................................................................................................... 5-4
5.1.4.1 Overview ........................................................................................................................................ 5-4
5.1.4.1.1 Condition Registers .................................................................................................................... 5-4
5.1.4.1.2 Event Registers .......................................................................................................................... 5-4
5.1.4.1.3 Enable Registers ........................................................................................................................ 5-4
5.1.4.1.4 Status
Byte Register ................................................................................................................... 5-4
5.1.4.1.5 Service
Request Enable Register............................................................................................... 5-4
5.1.4.1.6 Reading Registers ...................................................................................................................... 5-7
5.1.4.1.7 Programming Registers .............................................................................................................. 5-7
5.1.4.1.8 Clearing Registers ...................................................................................................................... 5-7
