Metrohm 787 KF Titrino - Manual (Page 21)

2.3 Tutorial
787 KF Titrino
17
Drift correction of the results
You can correct your results by the drift. This is primarily necessary if you wish to deter-
mine very small amounts of moisture or when you have very long titration times.
For the correction "drift value ∗ titration time" is subtracted form the dispensed volume:
corrected volume = dispensed volume – (drift value ∗ titration time)
The drift value can be determined automatically or entered manually. In the automatic
determination the current drift value at the start of the titration is stored and used for the
correction. In the manual entry you yourself enter a fixed value, e.g. the stable drift value
that you have read off from the display during conditioning.
<CALC DATA>
7 × <ENTER>
2 × <SELECT>
<ENTER>
2.2
<ENTER>
<QUIT>
• Activate the drift correction: Press <CALC DATA>
and enter the inquiries of the "calculation" group with
<ENTER>. Proceed with <ENTER> until the dis-
play shows:
• Make your selection with <SELECT>, e.g. "man.".
• Enter a drift value, e.g. 2.2 µL/min and exit the in-
quiry.
The result is recalculated and the first line of the display
shows
-d means that a drift correction has been performed.
If you have connected a printer, the full report provides
you with all data for recalculation of the result:
KFT volume 3.459 ml
drift corr.: OFF
KFT volume 3.459 ml
drift value 0.0 µl/min
KFT-Vol -d 2.365 ml
date 2002-03-27 time 13:55:10 3
smpl size 0.03 g
KFR volume 3.459 ml
drift man. 2.2 µl/min
(-d)time 1.03
water 922.2 mg/ml
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