Chapter 3 Parameters
Mini-Switch LB 471
3.4 Parameter Description
Code numbers which are visible only in the professional mode,
e.g. C o d e 0 3 , are displayed with a shaded background.
Password
Lock system by entering a 4-digit number
If the device is locked, all codes can be read but
not edited. If the device is locked, a key appears
on the display for all parameters.
To lock the device, you have to enter a digit unequal to zero.
This is the password which can be used to unlock the device
again.
To delete the password, you have to enter 0000. The password
can only be deleted when the device is unlocked.
The following illustration explains the display when code 00 is se-
lected.
Password known!
Device not locked!
Password known!
Device locked!
Year
Display or enter current year
The year is needed to compensate for the decay of the count rates.
Since the activity of the source decreases in the course of time,
the count rates have to be compensated for automatically using
the date. Therefore, the date always has to be kept up-to-date.
The device includes a capacitor-buffered real-time clock, which
keeps counting the current time for about 1 month even if the de-
vice is turned off.
The device signals a date error if it detects any significant devia-
tion between the actual date and the date last stored. However,
the device continues to work with the stored date.
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