User guide
Table Of Contents
- Table of Contents
- List of Figures
- List of Tables
- Foreword
- 1 Introduction
- 1.1 Model 4Q1010PS-430 Integrated Power Supply System Features
- 1.1.1 Digitally-Controlled
- 1.1.2 Superior Resolution and Stability
- 1.1.3 Intuitive Human-Interface Design
- 1.1.4 Flexibility
- 1.1.5 Standard Remote Interfaces
- 1.1.6 Programmable Safety Features
- 1.1.7 Condition-Based Magnet Auto-Rampdown
- 1.1.8 Model 4Q1010PS-430 General Description
- 1.1.9 Power Supply System Rack Front Panel Layout
- 1.2 Model 430 Front Panel Layout
- 1.3 Model 430 Rear Panel Layout
- 1.4 Power Supply Unit Front Panel Layout
- 1.5 System Specifications @ 25 C
- 1.6 Operating Characteristics
- 1.1 Model 4Q1010PS-430 Integrated Power Supply System Features
- 2 Installation
- 3 Operation
- 3.1 System Power On/Off Sequence
- 3.2 Model 430 Programmer Default Display
- 3.3 Entering Numeric Values
- 3.4 Using Fine Adjust Knob to Adjust Numeric Values
- 3.5 Entering Picklist Values
- 3.6 Single-key Commands / Menu
- 3.7 SHIFT-key Commands / Menus
- Figure 3-5. SHIFT-Key Functions
- 3.7.1 Ramp Rate SHIFT-key
- 3.7.2 Voltage Limit SHIFT-key
- 3.7.3 Reset Quench SHIFT-key
- 3.7.4 Increment Field SHIFT-key
- 3.7.5 Field <> Current SHIFT-key
- 3.7.6 Decrement Field SHIFT-key
- 3.7.7 Field Units SHIFT-key
- 3.7.8 Persistent Switch Heater Current SHIFT-key
- 3.7.9 Stability SHIFT-key
- 3.7.10 Vs <> Vm SHIFT-key
- 3.7.11 Volt Meter SHIFT-key
- 3.7.12 Fine Adjust SHIFT-key
- 3.7.13 Persist. Switch Control SHIFT-key
- 3.8 LED Indicators
- 3.9 Setup Menu
- 3.10 Setup Submenu Descriptions
- Figure 3-7. Setup Menu Structure
- 3.10.1 Supply Submenu
- 3.10.2 Load Submenu
- 3.10.2.1 Stability Setting
- 3.10.2.2 Coil Constant
- 3.10.2.3 Magnet Current Rating
- 3.10.2.4 Current Limit
- 3.10.2.5 Calculate Magnet Inductance
- 3.10.2.6 PSwitch Installed
- 3.10.2.7 PSwitch Current Detect (mA)
- 3.10.2.8 PSwitch Current
- 3.10.2.9 PSwitch Heated Time
- 3.10.2.10 PSwitch Cooled Time
- 3.10.2.11 PSwitch Power Supply Ramp Rate
- 3.10.2.12 PSwitch Cooling Gain
- 3.10.2.13 Enable Quench Detect
- 3.10.2.14 Energy Absorber Present
- 3.10.2.15 Enable External Rampdown
- 3.10.3 Misc Submenu
- 3.10.4 Net Settings Submenu
- 3.10.5 Net Setup Submenu
- 3.11 Example Setup
- 3.12 Ramping Functions
- 3.13 Persistent Switch Control
- 3.14 Ramping Functions Example
- 3.15 Quench Detection
- 3.16 External Rampdown
- 3.17 Summary of Operational Limits and Default Settings
- 4 Remote Interface Reference
- 4.1 SCPI Command Summary
- 4.2 Programming Overview
- 4.3 RS-232 Configuration
- 4.4 Ethernet Configuration
- 4.5 Command Reference
- 4.5.1 System-Related Commands
- 4.5.2 Status System Commands
- 4.5.3 SETUP Configuration Commands and Queries
- 4.5.4 Protection Commands and Queries
- 4.5.5 Ramp Configuration Commands and Queries
- 4.5.6 Ramping State Commands and Queries
- 4.5.7 Switch Heater Command and Query
- 4.5.8 Quench State Commands and Queries
- 4.5.9 Rampdown State Queries
- 4.5.10 Trigger Functions
- 4.6 Error Messages
- 5 Service
- 5.1 System Component Maintenance
- 5.2 Troubleshooting Hints
- 5.2.1 Electrostatic Discharge Precautions
- 5.2.2 The Model 430 does not appear to be energized
- 5.2.3 FAILURE TO LOAD message displayed after power-up
- 5.2.4 Power supply unstable - magnet voltage oscillates
- 5.2.5 The power supply system will not charge the magnet.
- 5.2.6 Cannot charge the magnet at the selected ramp rate.
- 5.2.7 Cannot discharge the magnet at the selected ramp rate
- 5.2.8 Cannot charge the magnet to desired field.
- 5.2.9 Current in only one direction from 4-quadrant supply
- 5.2.10 Cannot place the magnet in persistent mode.
- 5.2.11 Cannot bring the magnet out of persistent mode.
- 5.2.12 The magnet quenches for no apparent reason
- 5.2.13 Cannot lower the magnet field
- 5.2.14 There is excessive LHe boil-off during operation.
- 5.2.15 Cannot display the magnetic field strength, only current
- 5.2.16 Cannot use remote communications commands.
- 5.2.17 Magnet current drifts unacceptably while PSwitch cooling
- 5.2.18 Model 430 appears to lock up when connecting to network
- 5.3 Additional Technical Support
- 5.4 Return Authorization
- Appendix
- A.1 Magnet Station Connectors
- A.2 LHe Level / Temp Connectors
- A.3 Programmer Shunt Terminals
- A.4 Program Out Connector
- A.5 Quench I/O Connector
- A.6 Aux Inputs Connector
- A.7 Ethernet Connector
- A.8 RS-232 Connector
- A.9 Abbreviations and Acronyms used in this Manual
- A.10 Model 430 Programmer Specifications
- A.11 Power Supply Details
- A.12 Remote Computer Communication with the Model 430
- A.13 Upgrading the Model 430 Firmware via FTP
- A.14 Upgrading the Model 430 Firmware via Flash Card Reader
- A.15 Model 430 Remote Control Application
- A.16 Model 430IP Power Supply Programmer
- A.17 Persistent Switch Operation Flowchart
- Index
56 Rev. 5
Operation
Setup Menu : Load
120 seconds
1
. The value can be set by using either the numeric
keypad per section 3.3 on page 25 or the fine adjust knob
(section 3.4 on page 26). The default is 20 seconds unless preset by
AMI to match a specific superconducting magnet.
During the persistent switch heating period, the Model 430
Programmer ramping functions are disabled. The time delay is
necessary to ensure that the Model 430 will not switch to the higher
gain required for proper magnet operation before the magnet is
actually available in the circuit (not being shunted by the
persistent switch). If magnet operation is not stable after
expiration of the heating period, increase the heated time to allow
more time for the switch to heat. The default value of 20 seconds is
adequate for the majority of wet and dry persistent switches.
3.10.2.10 PSwitch Cooled Time
The PSwitch Cooled Time is the amount of time required for the
persistent switch to cool completely and become fully
superconducting. The time may be set to any value between 5 and
3600 seconds
2
. The value can be set by using either the numeric
keypad per section 3.3 on page 25 or the fine adjust knob
(section 3.4 on page 26). The default is 20 seconds unless preset by
AMI to match a specific superconducting magnet.
During the persistent switch cooling period, the Model 430
Programmer ramping functions are disabled. The default value of
20 seconds is adequate for the majority of wet persistent switches.
Persistent switches on conduction cooled magnets (dry switches)
will require significantly longer cooling times than wet switches.
3.10.2.11 PSwitch Power Supply Ramp Rate
The persistent switch power supply ramp rate is the rate at which
the magnet power supply will automatically be ramped up or down
while an installed persistent switch is in the cooled state. The rate
1. During the heating cycle, a “countdown” will be displayed indicating the number of
seconds remaining in the cycle.
2. During the cooling cycle, a “countdown” will be displayed indicating the number of
seconds remaining in the cycle.
+50.00 A — PSwitch Cooled Time (sec)
+0.50 Vs 20
+50.00 A — PSw P/S Ramp Rate (A/sec)
+0.50 Vs 10