Owner's manual

3 General settings for exploratory and determination mode
757 VA Computrace – Software
46
2. Purging
Optional purging of the sample solution during the
Initial purge
time
(details see Purging).
3. Drop formation
Hg drop formation at the MME if
DME
,
SMDE
or
HMDE
is se-
lected (details see Electrodes, section 3.1).
4. Conditioning cycles
Optional conditioning of solid state electrodes by applying
cyclic conditioning sweeps (details see Conditioning).
5. Cleaning
Optional cleaning of solid state electrodes by applying a
cleaning potential during the
Cleaning time
(details see Pre-
treatment).
6. Deposition
Optional electrochemical deposition for stripping voltammetry
during the
Deposition time
(details see Pretreatment).
7. Equilibration time
Optional waiting time before starting the sweep. During the
Equilibration time
, the stirring is switched off and the
Start po-
tential
is applied to the electrodes (details see Pretreatment).
8. Voltage sweep
Start of the voltage sweep which depends on the selected
measurement mode (details see VA measurement modes,
section 3.2).
9. Stand-by potential
Optional apply of a
Stand-by potential
after the end of the volt-
age sweep (details see Stand-by potential).
Stirring
If switched on (
Stirrer > 0 rpm
), the solution in the sample vessel at
the 757 VA Computrace Stand is stirred during all preparation
procedure steps until the start of the equilibration time.
Stirrer (rpm) [ 0...3000 rpm ; 2000 rpm ]
Revolutions per minute of the stirrer.