Metrohm 797 VA Computrace - Manual (Page 193)

6.2 Calibration techniques with CVS and CPVS
797 VA Computrace – Software
181
Example for Response curve :
C:\User XYZ\Data\Response curve.dth
Achtung: To make sure that for "Suppressor ana-
lysis with 838 Advanced Sample Processor and
RC" always the latest response curve file is taken
for the calculation, the path of the file chosen for
Response curve , must match with the path defined
for the parameter Data folder (for the currently
logged-in user) on the tab User Directories of the
window USER RIGHTS .
Achtung: A determined response curve file is on-
ly adopted automatically if the checkbox S
ave ca-
libration curves additionally without date and time
on the General tab of the GENERAL SETTINGS
window is checked.
No. of replications [ 1...10 ; 2 ]
Number of replications (= total number of measu-
rements) for each variation (sample, standard ad-
dition, calibration level, conditioning measure-
ment). For cyclic modes (CV, CVS, CPVS) the “total
number of measurements” is the
No. of replica-
tions multiplied with the number of Save last ..
sweeps ( Voltammetric tab). “Total number of mea-
surements” must not exceed 10.
Voltammetric tab with Calibration technique “RC Sample with
response curve”
The Voltammetric tab of the EDIT WORKING METHOD PARAME-
TERS window contains parameters for preparation procedures and
VA measurement modes. With the Calibration technique "RC Sam-
ple with response curve" the Voltammetric parameters are not ed-
itable. They depend on the parameters defined for recording the
calibration curve.
Following parameters have to be defined:
Initial mixing time (s) [ read only ] [ 0...80600 s ; 10 s ] (see Initial
mixing time with CVS and CPVS , section 6.3)
Time of mixing before the first measurement of
the sample solution.
Conditioning Cycles [ read only ] (see Conditioning cycles with CVS
and CPVS , section 6.3)
Start potential (V) [ -5...+5 V ; 0.2 V ] [ read only ]
Start voltage for the cyclic conditioning sweep.
End potential (V) [ -5...+5 V ; 1.625 V ] [ read only ]
Final voltage for the cyclic conditioning sweep.
No. of cycles [ 0...X ; 0 ] [ read only ]
Number of conditioning cycles.