Metrohm 899 Coulometer - Manual (Page 83)

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
7 Parameters
899 Coulometer
￭￭￭￭￭￭￭￭ 73
7 Parameters
7.1 Coulometric Karl Fischer titrations (KFC)
7.1.1 Conditioning
Menu ▶ Parameters ▶ Conditioning
Under Conditioning, the conditions required for conditioning are
defined.
Conditioning
If this parameter is activated, then the first time the titration is started the
working medium will be titrated to the endpoint with the specified control
parameters. The status is kept stable. The actual method run does not
begin until [START] has been pressed once more. Conditioning will be
carried out again automatically after the titration.
Selection on | off
Default value on
Start drift
If the measured drift is smaller than this value for a certain time (so-called
stabilizing time), then Conditioning OK will be displayed and the titra-
tion can be started. The stabilizing time is defined under Condition-
ing
▶ Stabilizing time.
Input range 1 ... 999 µg/min
Default value 20 µg/min
Drift correction
The end point amount can be drift-corrected. To accomplish this, the drift
is multiplied by the drift correction time and this value is subsequently sub-
tracted from the amount of the end point. The drift correction time is the
time interval between the end of conditioning and the end of the determi-
nation.
Selection auto | manual | off
Default value auto
auto
The value of the current drift is automatically applied at the start of the
titration.
manual
If the drift is known throughout a longer period of time, this can be
entered manually.