Metrohm 797 VA Computrace - Manual (Page 210)

7 Manual control
797 VA Computrace – Software
198
Switch on/off current measurement. If switched
on, the set
Potential is applied to the electrodes
and the current is measured continuously. This
mode is indicated by the red light beside the
button.
Potential (V) [ -5...+5 V ; 0 V ]
Voltage to be applied to the electrodes.
Potential (V) [ read only ]
Display of current voltage applied to the electro-
des.
Current (xA) [ read only ]
Display of measured current.
No electrode No electrode connected to the 797 VA Compu-
trace stand. This setting is useful for changing the
electrode at the stand.
DME Selection of the Dropping Mercury Electrode
(DME).
SMDE Selection of the Static Mercury Drop Electrode
(SMDE).
HMDE Selection of the Hanging Mercury Drop Electrode
(HMDE).
RDE/SSE Selection of the Rotating Disk electrode (RDE).
Switch on/off inert gas purging.
Tests the electrodes (see Check the MME , section
8.10).
Note: Occasional electrode tests should be done
in this sector and not with the “GLP Wizard” (not
to overwrite GLP data).
Switch on/off stirrer/RDE with the set RDE/Stirrer
speed .
RDE/Stirrer speed (rpm) [ 0...3000 rpm ; 2000 rpm ]
Revolutions per minute of the stirrer/RDE.
DME: Switch on free dropping at the MME.
SMDE: Dropping in intervals of ca. 1 s at the
MME.
HMDE: Formation of a new single mercury drop
at the MME .
Drop size [ 1...9 ; 4 ]
Size of the mercury drop (surface 0.15 mm 2 ...
0.60 mm 2 ).