Lakeshore Learning Materials 622 - Manual (Page 34)

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual
Operation 3-8
3.6.2.1 Outputs Only Screen
Press the OUTPUT ONLY Function key to display a
screen with output values in larger characters for
remote viewing. There are two screens: one with the
LHe Level/Field Option, one without the LHe
Level/Field Option.
3.6.2.2 LHe Level
Enters the Liquid Helium (LHe) Level screen. See
Paragraph 6.2 for a detailed description.
3.6.2.3 Field
Enters the Field screen. See Paragraph 6.2 for a
detailed description.
3.6.2.4 PSH Setup
Enters the Persistent Switch Heater (PSH) screen.
See Paragraph 6.3 for a detailed description.
3.6.3 FUNCTION MENU 3 SCREEN (PSH Option Card ONLY)
To display Function Menu 3 shown on the right,
press the Function Menu key, then press the Next
Menu key twice. Function Menu 3 has one selection:
DELAYS.
NOTE: The Delay Screen functions only with the
PSH option. Without the PSH, Function Menu 3 will
not appear.
3.6.3.1 Delays Setup Screen
Select DELAYS using the Function key to display
the Delays screen. Here, the user programs four
delays associated with Automatic Mode.
RUN UP
The time between initial ramp up to current and
PSH activation (Persistence Mode OFF). The delay
allows persistence switch current to settle. Specify a time from 1 to 999 seconds. Default is 60 seconds.
PERS OFF
The time between PSH activation (Persistence Mode OFF) and initial ramp to setpoint. The delay allows
persistence switch to go normal. Specify a time from 1 to 999 seconds. Default is 60 seconds.
RAMP END
The time between ramp up to setpoint and PSH deactivation (Persistence Mode ON). The delay allows
magnet current to settle. Specify a time from 1 to 999 seconds. Default is 60 seconds.
PERS ON
The time between PSH deactivation (Persistence Mode ON) and initial ramp back to zero. The delay allows
the persistence switch to superconduct. Specify a time from 1 to 999 seconds. Default is 60 seconds.
*
+ 0.001V
1.999
A
+
Outputs Only Screen without LHe Level/Field Option
*
+ 0.001V
14.4in
63.475kG +
1.999
A
+
Outputs Only Screen with LHe Level/Field Option
DELAYS
3/3
A U T O M A T I C M O D E D E L A Y S :
¤ R U N U P
P E R S O F F
R A M P E N D
P E R S O N
O U T P U T S : *
+1.999A : 6 0 S
: 6 0 S
: 6 0 S
: 6 0 S
L V L : + 1 4 . 4 i n
F L D : + 6 3 . 4 8 k G
+ 0 . 0 0 1 V