Lake Shore Model 647 Magnet Power Supply User’s Manual
Operation
3-3
3.5.2 Output Only Screen
Press the
OUTPUT ONLY
Function key to fill the
display screen with the output values.
3.5.3 Display Plot Screen
Press the
DISPLAY PLOT
Function key to display a
graphic plot of output values on the left side of the
display and the current and voltage output values on
the right side of the display.
3.5.4 Ramp Status Screen
Press the
RAMP STATUS
Function key to display the
Ramp Status screen to the right.
Use the Cursor keys to move the line indicator up or
down. The
¥
icon indicates parameters that can only
be changed using the up or down Numeric Entry keys.
Change all others using all the numeric entry modes,
including the cursor. Below are valid Ramp Status entries:
SEGMENT: <OFF> or <ON >
Ramp status. The ramp segment can be put in the Hold (Pause) mode at any time during the ramp. Use the
Up or down Numeric Entry keys to toggle the status.
STATUS: HOLDING or RAMPING
Indicates the ramp status. If the ramp is OFF, the status will be HOLDING. If the ramp is on, it will be
RAMPING. This line is skipped in the cursor up and down line selection.
FROM: +72.00 A to –72.00 A
Initial ramp current. This value is the present current setting, or the current setting when the ramp was put in
hold mode. If the ramp is put in the hold mode, the value will be whatever the current output setting is. When
the ramp is complete, this value is changed to the present current setting.
TO: +72.00 A to –72.00 A
Destination ramp current. Use any numeric entry mode to change the value.
AT: 0.00 A/SEC to 99.99 A/SEC
Ramp rate. Use any numeric entry mode to change the value. While ramping, the message “RAMPING / TO
HOLD” appears to the left of the interface status. This allows the ramp segment to be put in the hold mode
using the Up or down Numeric Entry keys from any screen.
3.6 FUNCTION MENU 2 SCREEN
To determine available secondary functions available,
press
Function Menu
to display Function Menu 1.
Press
Next Menu
to display Function Menu 2. <NP>
indicates the function is “Not Present” and the
associated function key is ignored.
EXIT MENU
Returns to the display screen the Function Menu 2 was entered from.
LHe LEVEL
Liquid Helium Level is not used with the Model 647 and shows <NP>.
FIELD
Enters the Field screen. See Paragraph 6.2.
SWITCH HTR
Persistent Switch Heater is not used with the Model 647 and shows <NP>.
- 0 .0 0 A
+ 0 .0 0 V
L O C
*
V
O U T P U T :
I
*
- 0 .0 0 A
+ 0 .0 0 V
L O C
: <O F F >
: H O L D IN G
: + 0 .0 0 A
: + 0 .0 0 A
: 0 .0 2 A / S E C
- 0 .0 0 A
+ 0 .0 0 V
L O C
R A M P S T A T U S :
¤ S E G M E N T
S T A T U S
F R O M
T O
A T
O U T P U T :
¥
*
2/ 3
EX IT M E NU
LH e L E V EL <NP >
FIE LD
SW ITC H HT R <NP >
¤
IM A X S E T :+ 7 2 .0 0 A
V M A X S E T :+ 3 2 .0 0 V
S E T T IN G S :
+ 0 .0 0 A
1.0 0 V
