Metrohm 756 KF Coulometer User Manual
Page 46
3.8 Statistics calculations
756/831 KF Coulometer, Instructions for Use
38
How do you obtain statistics calculations?
1) Enter the allocations for the statistics calculation (in expert mode only), see page 37.
2) Switch on the statistics calculations: either with <STATISTICS> or set the status under
<PARAM>,
>statistics
to
ON
. The "STATISTICS" LED is on. The status of the statistics
calculation is retained when a method is stored in the method memory.
3) Change the number of the individual values n under
mean n
, if necessary.
4) Perform at least 2 titrations. The statistics calculations are printed in the result report. If
you just wish the statistics printout when the nominal number of single determinations
is reached, configure the report as
statistics:OFF
, see page 22. With
statistics:ON
, the
statistics calculations are continuously updated.
5) The statistics report can be printed with <PRINT><STATISTICS><ENTER>.
Rules:
•
Recalculated results are incorporated in the statistics calculation.
•
If a result of a particular titration can not be calculated, no results for this determination
are incorporated in the statistics calculation. However, the sample counter is still
operative, i.e. the statistics calculation starts again when the number of required
individual determinations has been performed.
•
If the statistics are switched off ("statistics" LED no longer on), results are no longer
entered in the statistics table, but the table remains unchanged. When the statistics are
switched on again, you can immediately continue working.
•
If you delete results, all results of the determination with index n are removed from the
statistics evaluation.
•
If a method is changed the old statistics table is cleared and the statistics instructions
for the new method are followed.
•
Old results in the statistics table can be deleted with
delete all
(<PARAM>,
>statistics
,
res.tab:
).
If you start a new series with the same method you should also delete all statistics
results; this also resets the statistics counter.