American Magnetics 4Q12125PS-430 High Stability Integrated Power Supply System - Manual (Page 34)

16 Rev. 3
Installation
Magnets w/o Persistent Switch
i. Optional: Install an instrumentation cable between one of the LHe /
TEMP connectors (10) on the rear of the Model 430 Programmer
and the Model 13x Liquid Helium Level Instrument and/or
temperature instrument (9). Refer to section A.6.2 on page 151.
j. Optional: Install an instrumentation cable between the QUENCH
I/O connector (13) on the rear of the Model 430 Programmer and
Aux connector J2 on the rear panel of the Model 13x Liquid Helium
Level Instrument (12). Refer to section A.6.2 on page 151.
k. Connect each device line cord from the respective device to the
appropriate power receptacle.
l. Remote communications via Ethernet and/or RS-232 can be
accomplished by connecting suitable cabling to the Model 430
Programmer rear panel ETHERNET and/or RS-232 connectors.
2.6 Special Configurations
The Model 430 Programmer has been designed for optimal operation with
a superconducting magnet (i.e. a very low resistance, high inductance
load) with a persistent switch. The Model 430 Programmer is capable of
controlling current to other loads; however, some modification to the
Model 430 Programmer settings and/or connections must usually be made.
Two commonly encountered configurations are: 1) superconducting
magnets without a persistent switch, and 2) operation on a short-circuit or
low resistance load.
2.7 Superconducting Magnets with No Persistent Switch
An external stabilizing resistor for superconducting magnets without a
persistent switch is no longer required 1 . However, these systems do
require a specific Model 430 Programmer stability setting based on the
magnet inductance as follows:
For magnet inductance <= 100 Henries (H):
Stability Setting = (100 - H)
For magnet inductance > 100 Henries:
Stability Setting = 0
1. Effective with Model 430 firmware version 1.62.