American Magnetics 430, Инструкции по установке, эксплуатации и обслуживанию

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R
EV
9 119
A
MERICAN
M
AGNETICS
, I
NC
. O
PERATION
: P
ERSISTENT
S
WITCH
C
ONTROL
NOTE
The magnet voltage (Vm) is monitored during the switch heating
cycle. If the voltage is greater than 0.5 V, the Model 430
Programmer will beep and display a message to indicate a
mismatch between the magnet current and power supply current.
NOTE
This mismatch in current indicates the magnet current (and
therefore the field) has decayed significantly during the time the
magnet was in persistent mode. Since this is not a critical error
57
,
the screen will change back to the default display typically at
some field/current less than the last recorded persistent value.
6. After the Model 430 Programmer has completed this persistent switch heat-
ing operation, the display reads:
7. After
ENTER
is pressed, the default field/current status screen is displayed
with the power supply in the pause mode:
57. This current mismatch could be indicative of a problem with the magnet persistent joints.
+50.00 A Mode: Heating Switch (4)
+0.86 Vm *** Current Mismatch ***
+47.59 A
P
Mode: Paused
0.00 Vm PSwitch Heater: ON
+50.00 A
P
Mode: Magnet in Driven Mode
0.00 Vm Press ENTER to continue
+50.00 A
P
Mode: Paused
0.00 Vm PSwitch Heater: ON