Metrohm 840 PC Control 5.0 / Touch Control User Manual

Page 55

Operation

PC Control / Touch Control

• Document message: the fact that the monitoring interval had expired

when the determination was carried out will be documented in the

determination data. The message can be viewed under

Results/More determination data/Messages (see

• Cancel determination: the determination sequence will stopped

and the following message shown:

Under Titer options/History the date, time and values of the last ten

titer determinations are shown in a table. Titers which have been

determined automatically are shown in green, manually entered titer

values are shown in black and marked with (m). With [Graph] you can

open a graph in which the titer values are plotted against the date of the

titer determination. With [Delete history] you can delete the

complete history if, for example, the reagent is changed or a new bottle

is opened. If multiple determinations (Statistics) have been carried out

in order to calculate the titer then only one entry will be made in the

history.

This graph corresponds to a control chart on which both warning

limits and intervention limits are shown for the titer determinations.

The values for these warning limits and intervention limits can be

entered under Graph/Limits. No automatic action is taken when these

limits are infringed.