Metrohm 757 VA Computrace - Manual (Page 136)

6 Manual control
757 VA Computrace – Software
126
10 mA ... 100 nA
Selection of current range for measurement in
the manual control mode.
I ovl Indication of current overload by red light.
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 elec-
trodes.
Current (xA) [ read only ]
Display of measured current.
No electrode No electrode connected to the 757 VA Com-
putrace 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.
Switch on/off stirrer/RDE with the set RDE/Stirrrer
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 ).