Rev. 5
57
Operation
Setup Menu : Load
The Current Limit setting can be used to limit the magnet current
to values
lower
than the Magnet Current Rating for testing or other
purposes (refer to Figure 3-12).
The value can be set by using either the numeric keypad per
section 3.3 on page 29 or the fine adjust knob (section 3.4 on
page 31). The Current Limit is specified as an absolute value, but if
the power supply is four quadrant, the Current Limit applies to
both the positive and the negative current direction (current limit
symmetry). The Model 430 Programmer will beep once and deny
the change if the user attempts to set the Current Limit below the
present Target Field Setpoint.
3.10.2.5
Calculate Magnet Inductance
This menu pick will automatically determine the inductance of the
load magnet. The inductance is determined by measuring the
voltage developed across the magnet (V
m
) with a fixed di/dt
(current rate-of-change in A/sec) passed through the load.
The
function must be executed with the magnet ramping.
1
After the
function is executed by pressing the
ENTER
key, the algorithm will
wait for 2 seconds to allow the current charge rate to stabilize and
1. Refer to section 3.12.3 on page 80.
Figure 3-12.
Example Current Limit Setup
+00.00 A — Magnet Inductance (H)
+0.00 Vs
Calculate
Summary of Contents for 05100PS-430-601
Page 2: ......
Page 10: ...x Rev 5 List of Figures ...
Page 12: ...xii Rev 5 List of Tables ...
Page 18: ...xviii Rev 5 Foreword Safety Summary ...
Page 30: ...12 Rev 5 Introduction Operating Characteristics ...
Page 42: ...24 Rev 3 Installation Power Up Procedure ...
Page 114: ...96 Rev 5 Operation Summary of Operational Limits ...
Page 156: ...138 Rev 5 Remote Interface Reference Error Messages ...
Page 168: ...150 Rev 5 Service Return Authorization ...
Page 226: ...208 Rev 5 Index ...
