186
R
EV
9
A
MERICAN
M
AGNETICS
, I
NC
.
S
ERVICE
: T
ROUBLESHOOTING
H
INTS
2. Verify the power supply controlled by the Model 430 Programmer is config-
ured for remote programming, voltage-to-voltage mode. Consult the manu-
facturer’s operations manual for the necessary power supply configuration.
3. Verify that the persistent switch heater is operating. Also, verify that the
actual persistent switch in the magnet is correctly installed and connected.
NOTE
If the persistent switch heater is activated without an inductive
load present at the supply outputs, oscillating current will result.
The Model 430 Programmer is designed to operate large inductive
loads with only relatively small resistive characteristics (i.e.
superconducting magnets). The Model 430 Programmer is not
designed for use as a general purpose power supply controller for
resistive loads.
4. If the magnet has no persistent switch installed, or has a small inductance
(typically less than 3 H), then adjust the stability setting for the Model 430
Programmer. As this setting is increased, the system should become more
stable. For best results, minimize the amount that this value is adjusted from
0.0%. Refer to page 79 for more details about the Stability Setting.
T
HE
P
OWER
S
UPPLY
S
YSTEM
WILL
NOT
C
HARGE
THE
M
AGNET
1. Verify system interconnecting wiring. If the Model 430 Programmer shows
“+0.00 A
↑
Status: Ramping
”
with the supply voltage, Vs, increasing or at
the programmed Voltage Limit (as indicated by the reverse video “V” status
indicator), there may be a problem with the power supply. Verify the power
supply is on and the program out connection from the Model 430 Program-
mer to the program voltage input to the power supply is intact.
2. Verify the power leads are properly connected to the magnet.
3. Verify the power supply is configured for remote programming, voltage-to-
voltage mode.
4. If the system incorporates the Model 601 Energy Absorber, check the sys-
tem wiring and verify that the current flow direction through the Model 601 is
from the positive (+) to the negative (-) lug.
5. If the system incorporates the Model 601 Energy Absorber, verify that the
supplied external DC power converter is connected to the rear of the Model
601, and the AC power cord is also connected to the appropriate power
receptacle.
6. If the system incorporates the Model 601 Energy Absorber, check the Volt-
age Limit settings of the Model 430 Power Supply Programmer and verify the
limits are set to a value greater than 5 volts plus the charging voltage and
any power lead voltage drops.
C
ANNOT
C
HARGE
THE
M
AGNET
AT
THE
S
ELECTED
R
AMP
R
ATE
1. Ensure the Model 430 Programmer is properly configured for the connected
power supply. See page 73.
2. Ensure that the persistent switch heater is on and the switch heated time has
expired. Ramping is disabled during the switch heating period.
Summary of Contents for 430
Page 2: ......
Page 16: ...XVI REV 9 AMERICAN MAGNETICS INC FOREWORD SAFETY SUMMARY ...
Page 28: ...12 REV 9 AMERICAN MAGNETICS INC INTRODUCTION OPERATING CHARACTERISTICS ...
Page 64: ...48 REV 9 AMERICAN MAGNETICS INC INSTALLATION POWER UP AND TEST PROCEDURE ...
Page 208: ...192 REV 9 AMERICAN MAGNETICS INC SERVICE RETURN AUTHORIZATION ...
Page 248: ...232 REV 9 AMERICAN MAGNETICS INC APPENDIX SHORT SAMPLE MODE ...
