Metrohm 797 VA Computrace - Manual (Page 191)

6.2 Calibration techniques with CVS and CPVS
797 VA Computrace – Software
179
ons are stopped and the “Calibration factor” is
calculated.
Evaluation ratio Q/Q(0) [ 0…1 ; 0.5]
The “Evaluation ratio” defines the point of evalua-
tion for the calculation of the “Calibration factor”
Z.
Begin of evaluation Q/Q(0) [ 0…1 ; 1.0]
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 Sample with 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.
Choose the desired response curve in the field
Response curve of
the Determination (Use "RC Record response curve" to record the
response curve).
Note: A determined response curve file can only be adopted au-
tomatically if the checkbox Save calibration curves additionally
without date and time on the General tab of the GENERAL SET-
TINGS window is checked.
Determination tab with Calibration technique “RC Sample
with 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 Sam-
ple with response curve" follo wing parameters have to be defined:
Sample identifier [ 32 Zeichen ; "sample" ]
Identification for sample. The Sample identifier is
used for the file name.
Volume production bath (mL) [> 0 mL ; 10 mL]
The volume of sample bath solution added (see
Production bath solution , Kap. 6.4).
Cell volume (mL) [ > 0 mL ; 10 mL ] [ read only ]
Zellvolumen; gesamtes Lösungsvolumen (ist gleich
gross wie das Volumen der VMS (Virgin Make-up
Solution)) im Messgefäss beim Start der Bestim-
mung. Die berechneten Probekonzentrationen
Conc. beziehen sich auf dieses Zellvolumen.