Metrohm 746 VA Trace Analyzer User Manual

Page 480

6.7 Baseline calculation

746 VA Trace Analyzer / 747 VA Stand

6-17

6.7.4

Baselines for AC2 curves

With curves recorded with the measurement mode

AC2MODE

, only the following two

possibilities are available for calculation of the baseline:

•

Type = AC2 rel., Scope = whole

In the evaluation of AC2 curves with the baseline type

AC2 rel.

, the previ-

ously determined peak base points

dU.front

and

dU.rear

are connected

with each other to give the linear baseline. The two peak heights I

and I

are

then determined relative to the linear baseline and added to the result

I.rel

Instead of being determined

automatically, the two base

points

dU.front

and

dU.rear

can also be entered manually

either by numeric entry or by

shifting using the cursor keys

(see "CURVES", section 5.5.3).

In contrast, the two slopes

S.front

and

S.rear

have no

meaning here, a numeric entry

is ignored.

AC2 rel.

I.rel =

+ I

dU.front dU.rear

•

Type = AC2 abs./linear, Scope = whole

In the evaluation of AC2 curves with the baseline type

AC2 abs.

linear

while the previously determined peak base points

dU.front

and

dU.rear

are shown and connected to give a linear baseline, this baseline is not

needed for the evaluation. The entire peak height

I.abs

is determined and

put out as the result.
The two base points

dU.front

and

dU.rear

and the two slopes

S.front

and

S.rear

have no

meaning here, a numeric entry is

ignored with these parameters.

I.abs

AC2 abs.

dU.front dU.rear