Metrohm 797 VA Computrace - Manual (Page 114)

5 Determination mode
797 VA Computrace – Software
102
For the Electroplating Bath VA Calibration technique “DT Record
calibration curve” (to get the “Calibration factor” for Suppressor
determination), following formula is quoted:
Cal.factor Z
Is the “Calibration factor” to calculate the Sup-
pressor concentration in the bath. It is determined
at the “Evaluation ratio”. The default unit of the
Cal.factor Z is mL/L. For all internal calculations the
unit mL/L is used even if the output unit has been
changed.
V(std)
Is the volume of Suppressor standard solution at
the “Evaluation ratio”.
c(std)
Is the concentration of Suppressor standard solu-
tion.
V(VMS)
Is the volume of VMS (Virgin Make-up Solution).
For the Electroplating Bath VA
Calibration technique “DT Suppres-
sors with calibration curve” (for Suppressor determination), follo-
wing formula is quoted:
Z
Is the “Calibration factor” to calculate the Sup-
pressor concentration in the bath. It is determined
at the “Evaluation ratio”. The unit of the “Cali-
bration factor” is mL/L.. For all internal calculati-
ons the unit mL/L is used even if the output unit
has been changed.
V (prod.bath)
Volume of the added plating bath at the “Evalua-
tion ratio”.
Variable addition
Variable addition volumes can be entered in the EDIT VARIED AD-
DITION window which is opened by clicking the button for the
selected substance in the Volume column in the Substances tab of
the EDIT WORKING METHOD PARAMETERS window.