Operation
LXT-220 DO
Teledyne Analytical Instruments
32
Figure 3-2: Numerical Entry Using Front Panel Keys
After successfully entering the operational password it remains
valid for 60 seconds after exiting the calibration mode on that display.
During that time a second display can be accessed without re-entering
the password. The 60 second timer starts again when exiting the cali-
bration mode on that display also, so that any number of operational
displays can be modified with a single password entry.
If the wrong password is entered three consecutive times in
accessing a protected display all password access is disabled, and the
main display shows “Err PW”. The instrument continues to function
normally, but none of the password-protected settings can be changed.
Normal operation is restored by momentarily turning off power. No
keyboard commands are required to restore normal password protection.
The Err PW display is cleared by any keystroke, but when attempting to
enter a password the display will still show disabled.
If the password is lost and you want to gain access to protected
screens and/or enter a new password, turn off the power, and then reapply
it. Within one second of the time that text first appears on the screen,
press the rightmost key on the keyboard. The screen will go blank to
acknowledge the key press, but there will be no other visible indication
that the key is recognized. After a few seconds the instrument will begin
functioning normally except that the configuration password has been
disabled for 60 seconds. The operational password remains in effect.
Immediately enter the configuration mode and choose a new password.
Note: This method will not work if the key is down at the time
power is applied. The key must be depressed shortly after
text first appears.
The following displays control the password settings.
Operate password level:
3
no PW
