Metrohm 797 VA Computrace - Manual (Page 175)

6.2 Calibration techniques with CVS and CPVS
797 VA Computrace – Software
163
Contamination potential [ -5...5 ; 1.125 V ]
With CVS: If it is activated, the current is readout
for the defined potential during the last sweep (in
anodic direction) of the bath determination.
With CPVS: One of the defined stripping steps
(Voltammetric tab with Calibration technique
"LAT") can be selected. If it is activated, the cur-
rent is readout for the selected potential during
the last sweep (in anodic direction) of the bath de-
termination.
The Contamination potential correlates with the
concentration of organic degradation products in
the electroplating bath.
Chloride potential [ -5...5 ; 1.475 V ]
With CVS: If it is activated, the current is readout
for the defined potential during the last sweep (in
anodic direction) of the bath determination.
With CPVS: One of the defined stripping steps
(Voltammetric tab with Calibration technique
"LAT") can be selected. If it is activated, the cur-
rent is readout for the selected potential during
the last sweep (in anodic direction) of the bath de-
termination.
The Chloride potential correlates with the concen-
tration of chloride in the electroplating bath.
Regression technique [ Linear Regression ]
The regression is calculated with a straight line.
Peak evaluation [ Height, Area, Derivative, Coulometric ; Coulomet-
ric ]
Selection of peak evaluation quantity:
Height
Peak height from baseline to peak maximum.
Area
Peak area between peak curve and calculated
baseline.
Derivative
Difference between positive an negative maximum
of the first derivative of the voltammogram.
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.