Metrohm 796 Titroprocessor - Manual (Page 86)

5.3 Determinations
796 Titroprocessor, Instructions for use 80 80
5.3 Determinations
A method can be used to carry out a determination on a sample which can
include up to five titration or measurement modes. Each of these modes
can contain separate calculation formulas and report definitions. Each
mode produces its own data records (measuring point lists). These form the
basis of all reports and graphs. The complete report of a determination
comprises determination reports together with reports of the individual
titrations or measurements.
The data produced during a determination are stored in a file which can be
stored automatically in the internal memory or on a data card. It is also
possible to transfer the determination data directly via an RS232 interface as
a raw data report to a suitable PC database such as Metrodata
VESUV 3 or
to store the whole file on a PC. Determination files can be comfortably
copied, renamed or deleted with the file manager.
Existing determination data can be subsequently re-evaluated and
recalculated without any problems and without having to load the original
method.
5.3.1 Carrying out a determination
A determination is started with the <START>key. The defined start report is
printed out first.
The method is then processed line by line. As soon as an
END command
is reached the determination will be terminated properly. The determination
data are stored in a file and the final report is printed. If the autostart
function has been switched on the next determination will be started;
otherwise the Titroprocessor 796 will return to the normal state.
A determination run can be interrupted with the <HOLD / CONT>key. The
determination can be continued by pressing the <HOLD / CONT> key
again. In the 'Hold' condition the Titroprocessor can be operated normally.
The ('Live') parameters of the method can be edited. The various peripheral
devices can be operated manually provided that they not blocked by the
determination. This is a particular advantage when a sample changer is
being used. The determination can also be completely terminated in the
'Hold' condition with the <STOP> key.
A running determination can be terminated at any point with the
<STOP>key. The necessary termination operations are carried out just as
in a regular determination. The type of determination termination is
mentioned in the results report (e.g. termination condition
'manual' or
'regular').
If the autostart function is switched on pressing the <STOP> key will
terminate the complete series of samples.
If in a determination run containing several commands the execution of the
currently active command is to be interrupted and a jump made to the
following command in the method then this can be carried out with the
<SKIP>key by pressing the key combination <с
с ><HOLD / CONT>.
Warning: during the start phase of a titration only the addition of the initial
volume is terminated with the
<SKIP> key. The titration will nevertheless be
carried out normally.
START
HOLD
CONT
STOP
SKIP
HOLD
CONT