User guide

158 Rev. 5
Appendix
Model 430 Specifications
A.10 Model 430 Programmer Specifications
Additional Model 430 Programmer Specifications
Table A-10. Model 430 Programmer Specifications @ 25°C
Magnet Current Control
Parameters
Standard Model 430 Configurations: Programmable Limits
±5 A
±10 A +100 A +120 A ±125 A +200 A ±250 A +300 A +500 A
Measurement Resolution (μA): 0.625 1.25 6.25 7.5 15.6 12.5 31.2 18.7 31.2
Accuracy (% of
I
max
):
0.04
a
a. 0.005 for zero flux current sensing (high-stability) system
0.04
a
0.04
a
0.04
a
0.04
a
0.04
a
0.04
a
0.005 0.005
Minimum Ramp Rate (μA/min): 10
10 100 100 100 100 100 100 100
Maximum Ramp Rate (A/sec): 1
11010 10 20 20 30 30
Magnet Current Control
Temperature Coefficient:
0.01% of I
max
per °C
Stability:
With standard resistive shunt, better than
0.02% of I
max
after 20 minutes at desired
current and better than 0.01% of I
max
after 60
minutes at desired current ,
With zero flux current sensing option, 0.001%
of I
max
after 10 minutes at desired current
Programming Resolution:
15 digits
a
Ramp Rate Resolution:
15 digits
a
Nominal Load Inductance Range: 0.5 to 100 H
Program Out Voltage
Programmable Limits: −10 to +10 Vdc
Accuracy:
3 mV (0.03% of V
max
)
Temperature Coefficient:
0.2 mV
per °C (0.002% of V
max
per °C)
Resolution: 0.3 mV
Stability: Better than 10 mV p-p when paused or holding
(with 0.5 to 100 H load)
Magnet Voltage Measurement
Maximum Limits: −20 to +20 Vdc
Accuracy:
20 mV (0.1% of V
max
per °C)
Temperature Coefficient:
1.5 mV per °C (0.0075% of V
max
per °C)
Resolution: 10 mV
Persistent Switch Heater Output