Metrohm 746 VA Trace Analyzer - Manual (Page 258)

5.5.3 CURVES
746 VA Trace Analyzer / 747 VA Stand
5-107
Softkeys Meaning
Lwr/rght
corner
Once the bottom right corner point is in the desired position, it must
be fixed by pressing the softkey
or the
key. The selected zoom region is then shown full screen.
The procedure described for selection of the zoom region can be
repeated several times in succession. The enlarged display of the
curve remains active until the baseline modification is quit by pressing
the key.
Modify
dU.front
Activate front base point shift
The base point at the front half of the peak or wave is marked by a
double dash and can be shifted to the right or left using the cursor
keys <è> and <ç>. The following should be noted here:
Each time these keys are pressed, the base point moves in the
selected direction by 5 pixels. A finer shift of 1 pixel can be
achieved when the key is pressed at the same time. In
both cases, the cursor keys are repetitive, i.e. the longer the cur-
sor key is pressed, the further the corner point is shifted.
On completion of the shift, the curve is automatically recalculated and
displayed. The current value for
dU.front appears in the baseline
window. Alternatively, dU.front (just like the slope S.front ) can also
be changed numerically directly in the baseline window.
Modify
dU.rear
Activate rear base point shift
The base point at the rear half of the peak or wave is marked by a
double dash and can be shifted to the right or left using the cursor
keys <è> and <ç> in the manner described under
dU.front> .
On completion of the shift, the curve is automatically recalculated and
displayed. The current value for
dU.rear appears in the baseline
window. Alternatively, dU.rear (just like the slope S.rear ) can also be
changed numerically directly in the baseline window.
New
display
Redisplay curve
This softkey is used for manual initiation of a recalculation and curve
display (this normally runs automatically each time the parameter
modification is closed).
Reset
param.
Reset baseline parameters
The parameters appearing in the window are reset to the values
entered on the "SUBSTANCES" page.
Save
param.
Store baseline parameters
The parameters appearing in the window are transferred to the
"SUBSTANCES" page and hence stored in the method.