Metrohm 797 VA Computrace - Manual (Page 195)

6.2 Calibration techniques with CVS and CPVS
797 VA Computrace – Software
183
Regression technique [ read only ]
The regression technique is displayed.
Peak evaluation [ Coulometric ] [ read only ]
Selection of peak evaluation quantity:
Coulometric
Charge transmitted during the peak.
Smooth factor [ 1...6 ; 4 ]
Smoothing power of the Savitzky/Golay smooth-
ing of the baseline (1 = minimum smoothing, 6 =
maximum smoothing) (s
ee Smoothing and differ-
entiation , section 5.8 ).
Eliminate spikes
Eliminates spikes to smooth the signal.
Reverse sweep [ on, off ; off ]
Enable peak evaluation of the reverse sweep of
cyclic sweeps (not available with CPVS).
Endpoint and evaluation criteria
Begin of evaluation Q/Q(0) [ read only ]
Only the measuring points between the „Begin of
evaluation“ and the „Evaluation ratio“ are used for
the calculation of the regression (linear, nonlinear
and quadratic).
RC Record response curve
"RC Sample with response curve" is a "Response Curve Technique"
which can be used with the CVS and CPVS mode). The Response
Curve is a normalized calibration curve for electroplating bath addi-
tives with suppressing impact. The "Response Curve Technique" is
used for the determination of Suppressor in electroplating baths if
the "Dilution Titration Technique" can't be applied.
The response curves recorded with this
Calibration technique are
used together with Calibration technique "RC Sample with respon-
se curve" to determine Suppressor concentrations.
Note: A determined response curve file can only be adopted auto-
matically if the checkbox Save calibration curves additionally with-
out date and time on the General tab of the GENERAL SETTINGS
window is checked.
Determination tab with Calibration technique “RC Record
response curve”
The Determination tab of the EDIT WORKING METHOD PARAME-
TERS window contains general specifications for performing the
determination. The parameters displayed depend on the selected
Calibration technique and measurement Technique . With “RC Re-
cord response curve” following parameters have to be defined: