Lake Shore 460, Руководство пользователя

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Lake Shore Model 460 Gaussmeter User’s Manual
Operation
3-21
3.14 LOCKING AND UNLOCKING THE KEYBOARD
The Model 460 front panel keyboard may be locked, preventing unauthorized changes to the settings.
To lock the keyboard, press and hold the
Enter key (
≈
10 seconds) until the following display is seen.
En t e r Co d e t o
L o c k Ke y p a d
Now enter the 3-digit lock code (the factory default code is 123.) Upon entry of the third number, the
display reverts to the normal display. The keyboard is now locked. After locking the keypad, any
attempt to change settings causes the following message to briefly be displayed.
* L o c k e d *
To unlock the keyboard, again press and hold the
Enter key until the following display is seen.
En t e r Co d e t o
Un l o c k Ke y p a d
Enter the lock code again. Upon entry of the third number, the display reverts to the normal display and
the keyboard is unlocked.
The lock code may be changed using either the IEEE-488 or Serial Computer Interface. If the
instrument is reset, the lock code will revert to 123. The instrument cannot be reset when the keyboard
is locked.