BUCHI KjelSampler K-377 User Manual
Page 96
6 Operation
96
K-375/376/377 Operation Manual, Version B
Automatic Blank determination
With automatic blank determination switched on, each continuous row of measured blanks is
automatically averaged and the resulting mean value is used for the correction of the subsequently
measured sample(s). After one or more samples have been determined, the next measured blank (or
the mean of the next measured continuous row of blanks) will be used as active blank value for the
correction of the subsequent samples until the next blank is determined.
Automatically determined blanks are listed in the blank list with type “automatic”.
Enter the
Blank Correction screen.
Press
SETTINGS.
Within the settings for the blank correction,
• switch “Blank correction”
ON
• switch “Auto blank generation”
ON
• optionally select
YES for “Monitor blank limits”
Set the tolerable range for each blank, compared
with the mean blank value by defining the Upper
and Lower blank limit
• confirm your settings with
OK.
The currently active blank can be viewed in the
RESULT display of the status view.
NOTE
If you select
Yes for “Use last measured blank“ the next measured blank value will be used for the
correction of all subsequent sample determinations. All sample determinations up to the next blank
determination will still be corrected using the currently selected blank value.
Monitoring the blank limits
If the function “Monitor blank limits” is switched on, a tolerable range (defined by the upper- and
lower limit in percent) can be defined for an automatically calculated blank value. Each new deter-
mined blank that would be part of this calculation, is compared to the already calculated mean value.
If the deviation of this blank value is outside of the specified range, the sequence is stopped and a
warning message is displayed.
Changing an automatically calculated blank after it was used for sample correction
A user with operator rights is not allowed to change any calculated mean blank value that has already
been used for the correction of any results. Since this proceeding would have an impact to the calcu-
lated results this option is restricted to users with administrator rights. Each blank that was changed
subsequently (after it was used for sample correction) is marked with a “*”.