American Magnetics 430, Инструкции по установке, эксплуатации и обслуживанию

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R
EV
9 43
A
MERICAN
M
AGNETICS
, I
NC
. I
NSTALLATION
: T
HIRD
-P
ARTY
P
OWER
S
UPPLIES
T
HIRD
-P
ARTY
P
OWER
S
UPPLIES
The Model 430 Programmer has been designed to function with a wide
variety of third-party power supplies. Please contact an AMI Technical
Support Representative for compatibility with specific models. Custom
modifications can sometimes be made to accommodate supplies that
are not compatible with the standard Model 430 configurations.
S
PECIAL
C
ONFIGURATIONS
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.
S
UPERCONDUCTING
M
AGNETS WITH
N
O
P
ERSISTENT
S
WITCH
An external stabilizing resistor for superconducting magnets without a
persistent switch is no longer required
4
. However, electronically
stabilizing such magnets requires a filter that has a differentiating action
which can appear to amplify voltage noise across the magnet. If the
magnet voltage noise, as indicated by V
m
on the Model 430 status
screen, is considered excessive for a user’s experiment, the user may
opt instead to use a stabilizing resistor.
O
PTIONAL
S
TABILIZING
R
ESISTOR
I
NSTALLATION
The stabilizing resistor, along with the proper Model 430 configuration,
can reduce the apparent voltage noise across the magnet terminals by
an order of magnitude or more.
To configure the Model 430 to use the stabilizing resistor, perform the
following steps:
4. Effective with Model 430 firmware version 1.62 or later.