Metrohm 746 VA Trace Analyzer User Manual
Page 244
5.5.3 CURVES
746 VA Trace Analyzer / 747 VA Stand
5-93
5.5.3
CURVES
CURVES
M
This dialog page is used to display curves of the determination
loaded in the working memory. It is accessible only in the
instrument mode
* READY *
.
In addition to the display of the various types of curves for the
individual substances or segments, here interactive parameters
for scaling, substance recognition and the baseline calculation
can be changed and spikes eliminated manually.
In the selection of this dialog page, the following rules apply:
•
When the "CURVES" page is selected for the first time, the first
substance is displayed on this page, with later selections the
last selected substance.
•
Without special entry for the VR value, the smoothed curves of
all variations with replication 0 are shown for the selected
substance (
Substance-*0-smoothed
).
•
Simultaneous pressing of the keys
VR = 00
for the
first segment directly (
Segment-00-original
).
•
If no substance has been defined, following a warning the
original curve with
VR = 00
for the first segment is shown
(
Segment-00-original
).
With parameter changes, the following must be noted:
•
Changes in the display/plot, recognition or baseline parame-
ters lead to a recalculation and updated display of the curve.
These changes are temporary, i.e. they are canceled after exit
with
•
Parameter changes are permanently incorporated in the
method only if they are stored with
. To ensure
that these changes are also effective for the calculation of all
peak and wave results, a recalculation must be initiated with
on the "MONITORING" page (see section 5.5.1).
In the manual elimination of spikes, the following holds:
•
After closure with
cally initiates a recalculation with the changed measured
values. In order to access the original experimental data, the
softkey
on the "MONITORING" page
must be pressed.
•
In storage of a determination in the determination memory or
on the data card, the original experimental data (
original
) are
retained, but not those measured values changed with the
manual spike elimination (
processed
).
Before any type of parameter changes, it is advisable to store the
determination in the determination memory or on a data card to be
able to fall back on the unchanged determination and method in an
emergency.