Lakeshore Learning Materials 622 - Manual (Page 27)

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual
Operation 3-1
CHAPTER 3
OPERATION
3.0 GENERAL
This chapter covers seven areas: MPS Front Panel (Paragraph 3.1), Power Up (Paragraph 3.2), Setting
Current on an MPS with Manual PSH Control (Paragraph 3.3), Setting Current with Automatic PSH Control
(Paragraph 3.4), Instrument Setup Screens (Paragraph 3.5), Function Menus (Paragraph 3.6), and an
Automatic Persistence Control Example (Paragraph 3.7).
Setup the MPS software with the MPS output terminals shorted together as in section 3.2. This ensures that
while the user learns MPS operation, an inadvertent keystroke causes no damage to the magnet.
3.1 THE MPS FRONT PANEL
Figure 3.1 below shows the MPS Front Panel. The up or down Display Cursor Control keys move the line
indicator to the line containing a value to be changed. Use either the Data Entry Keypad to enter the desired
value or the up or down Numeric Entry keys to increment or decrement the value. The Enter key accepts the
update, while the Esc key discards the change and returns to the prior value. Move the cursor to a particular
digit with the right and left Display Cursor Control keys and change it with the Numeric Entry keys.
7 8 9
4 5 6
1 2 3
0 . +/- Enter
Esc
Function
Menu
Normal
Display Next
Menu
Cursor
Local
Remote
Mode
Output
Inhibit
Functions
Power
Fault
Persistent
Switch Heater OFF
ON
Magnet Power Supply
Data Entry
A B C D
I
E F
H
N
K
L
M
J
G
A. Display Screen
B. Display Function Keys
C. Display Menu Selection Keys
D. Data Entry Keypad
E. Escape Key. Restores an old value and
returns from a Function Screen to
Normal Screen. Also Aborts a ramp or
automatic process.
F. Interface Keys
G. Data Entry Up and Down Keys. Increment and
decrement numeric values, Pause/Restart
ramps, or execute some functions.
H. Output Inhibit Key
I. Display Cursor Control Keys
J. Enter Key. Accepts a change.
K. Power Indicator
L. Fault Indicator
M. Persistent Switch Heater Indicator
N. Power Switch
Figure 3-1 MPS Front Panel