Lake Shore 625, User Manual

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Lake Shore Model 625 Superconducting MPS User’s Manual
4-18 Operation
Computer Interface
Select With °®
IEEE Term: Cr Lf
Use the
s
or
t
key to select one of the following terminators: CR/LF, LF/CR, LF, and EOI. The default is Cr Lf. Press
Enter to accept the new selection and continue to the next setting screen. Press Escape to cancel the new selection and
return to the normal display.
4.21 DEFAULT PARAMETER VALUES
It is sometimes desirable to reset instrument parameters to their default values. This data is stored in nonvolatile memory
called EEPROM. Instrument calibration is not affected by this operation. Firmware version information for the main
firmware and the DAC firmware is also displayed during this sequence.
To clear EEPROM memory or view the firmware versions press and hold the Escape key for 5 seconds. The following
screen appears to show the main firmware version, the DAC processor firmware version, and as a prompt for returning
the instrument parameters to default values. Default parameter values are listed in Table 4-1.
Main Code Version: 1.0
DAC Code Version: 1.0
Select With °®
Default Values: No
Use the
s
or
t
key to select Yes for default values and No to continue without changing the parameter values. Press
Enter to accept the new selection and return to the normal display. Press Escape to cancel the new selection and return
to the normal display.
Table 4-1. Default Parameter Values
Output Settings
Output Current* ..................................... 0 A
Current Ramp Rate......................... 0.01 A/s
Compliance Voltage Limit ..................... 1 V
Maximum Settings
Max Output Current ............................. 60 A
Max Compliance Voltage Limit ............ 2 V
Max Ramp Rate .................................. 1 A/s
Calculated Field
Field Units .......................................... Tesla
Field Constant ................................. 0.1 T/A
Quench Detection
Quench Detection ............................ Enabled
Current Step Limit .............................. 2 A/s
External Program Mode
External Program Mode .................. Internal
Ramp Segments
Ramp Segments ............................. Disabled
Ramp Segments Current ........................ 0 A
Ramp Segments Rate ................. 0.0001 A/s
Display
Display Mode.................................... Current
Voltage Sense Display ............................. On
Brightness .............................................. 25%
Persistent Switch
Persistent Switch Mode .................. Disabled
PSH Output* ........................................... Off
PSH Current ....................................... 10 mA
PSH Delay Time ...................................... 5 s
Persistent Mode Rate ...................... Disabled
Persistent Mode Ramp Rate .............. 0.1 A/s
Keypad Locking
State ................................................Unlocked
Lock Code ............................................... 123
Computer Interface
Baud ...................................................... 9600
IEEE Address ............................................ 12
IEEE Terminators .............................. CR/LF
Mode* .................................................. Local
* Indicates value is also initialized on power up