Metrohm 746 VA Trace Analyzer - Manual (Page 474)

6.7 Baseline calculation
746 VA Trace Analyzer / 747 VA Stand
6-11
6.7 Baseline calculation
6.7.1 General
Recognized peaks or waves are evaluated by the 746 VA Trace Analyzer using ap-
proximated baselines. This section first explains the most important concepts for
the determination of these baselines.
• Baseline parameters
The calculation of baselines from the smoothed measured curves is deter-
mined by the baseline parameters on the dialog page "SUBSTANCES" (see
section 5.6.3) where the following 6 parameters can be defined individually
for every substance:
Type Baseline type ( linear , polynom , expon. , AC2 rel. , AC2 abs. )
Scope Baseline range ( whole , f.half , r.half , f.double , r.double )
dU.front Difference to front base point
S.front
Slope at front base point
dU.rear Difference to rear base point
S.rear Slope at rear base point
The setting possibilities of these parameters depend on the selected meas-
urement mode and are described in detail in section 6.7.2 through section
6.7.5. The following table provides an overview of the different selection and
combination possibilities for these parameters:
Type Scope
Measurement
mode
lin. pol. exp. AC2
rel.
AC2
abs.
whole f.half
r.half
f.double
r.double dU.front
dU.rear
S.front
S.rear
DCT (waves) l ¡ ¡ ¡ ¡ n l l
DCT (peaks),
l l l l ¡
DP, SQW, AC1, l l l l
CYC (1 ramp)
l l l l l l
AC2 l
l
l n
n ¡
l
¡
¡
PSA n n n n
l adjustable n no other choice possible ¡ adjustable, but without function