Metrohm 797 VA Computrace - Manual (Page 187)

6.2 Calibration techniques with CVS and CPVS
797 VA Computrace – Software
175
bration curves additionally without date and time
on the General tab of the GENERAL SETTINGS
window is checked.
Volume VMS (mL) [ > 0 mL ; 10 mL]
The volume of the Virgin Make-up Solution ( see
VMS (Virgin Make-up Solution) , section 6.4 ).
Cell volume (mL) [ > 0 mL ; 10 mL ] [ read only ]
Total volume of solution (equal to the volume of
the VMS (Virgin Make-up Solution)) in the measu-
ring vessel at the start of the determination. The
sample concentrations
Conc
. calculated refers to
this cell volume.
Initial electrode conditioning ( see Initial electrode conditioning,
section 6.3 )
Check the checkbox to use conditioning.
No. of conditioning measurements [ 1...100 ; 1 ]
Number of replications of conditioning measure-
ments. The “total number of conditioning measu-
rements” is the
No. of conditioning measurements
multiplied with the number of Save last .. sweeps
( Voltammetric tab). “Total number of conditioning
measurements” must not exceed 100.
or
Auto Std.dev (%)[ >0.1 ; 1 ]
Define until which „Std.dev.“ the conditioning is
continued. The „Std.dev.“ is calculated from all sa-
ved sweeps of the last two “conditioning meas-
urements”.
Note: If you set a small value (e.g. < 1%), it can
take a long time until reaching the target.
Note: If both No. of conditioning measurements [
1...100 ; 1 ] and Auto Std.dev (%) [ >0.1 ; 1 ] are
activated, the conditioning is finished as soon as
the first of the two criterias is reached.
Addition mixing time [ 0...80600 s ; 10 s ]
Time of mixing after Additions (for the first measu-
rement, the
Initial mixing time is used).
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 repli-