American Magnetics 430, Инструкции по установке, эксплуатации и обслуживанию

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MERICAN
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AGNETICS
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PERATION
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ETUP
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UBMENU
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ESCRIPTIONS
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changes for various stability setting ranges are shown in the
following table.
NOTE
The Model 430 will not operate in a stable fashion on a short-
circuit load unless it is configured for Test stability mode (see
page 78). Otherwise the 430 control logic assumes an inductive
superconducting magnet load is connected to the circuit.
C
OIL
C
ONSTANT
The coil constant is a scaling factor which converts the current to
kilogauss (kG) or tesla (T). It is also often referred to as the
field-
to-current ratio
. The coil constant is specified in kilogauss/
ampere or tesla/ampere. The value can be set by using either the
numeric keypad as described on page 54 or the fine adjust knob
(on page 55).
Values from 0.001 to 999.99999 are acceptable for the coil
constant. The default value is 1.00000 kG/A (or 0.10000 T/A)
unless preset by AMI to match a specific superconducting
magnet. If the coil constant value is 0.0 kG/A (or 0.0 T/A), then no
conversion from amperes to kilogauss or tesla is performed — all
operations will be performed and displayed in terms of amperes.
If the coil constant is not explicitly stated within a
superconducting magnet’s specifications, the value can be
obtained by dividing the rated field by the rated current. Note that
1 T = 10 kG.
Maximum Recommended Stability Setting Changes
Stability Setting Range
Maximum Recommended
Stability Setting Change
98% to 100% 0.1%
94% to 98% 0.2%
84% to 94% 0.5%
44% to 84% 2%
0% to 44% 5%
0.00 A — Coil Constant (kG/A)
+0.50 Vs
0.90000