Metrohm 746 VA Trace Analyzer User Manual
Page 176
5.3.2 STAND
746 VA Trace Analyzer / 747 VA Stand
5-25
Parameter
Range; Default value / Meaning
Pressure
on, off; off
Inert gas pressure (see
)
Purging
on, off; off
Purging (see
)
Stirrer
on, off; off
Stirrer (see
)
DME
on.dt, off; off
DME (Dropping Mercury Electrode) (see
)
HMDE
on, off; off
HMDE (Hanging Mercury Drop Electrode) (see
)
SMDE
on.dt, off; off
SMDE (Static Mercury Drop Electrode) (see
)
RDE
on, off; off
RDE (Rotating Disk Electrode) (see
)
Rot.speed
0, 200, 400, ..., 3000 /min; 2000 /min
Rotational speed of stirrer
Setting of the rotational speed of the stirrer for manual operation
(revolutions/min).
Drop size
1...9; 5
Drop size of the HMDE
Setting of the drop size of the HMDE (Hanging Mercury Drop Elec-
trode) for manual operation.
The surface area of the mercury drop is 0.15...0.60 mm
2
, depending
on the setting.
Drop size
1...9; 5
Drop size of the SMDE
Setting of the drop size of the SMDE (Static Mercury Drop Electrode)
for manual operation.
The surface area of the mercury drop is 0.15...0.60 mm
2
, depending
on the setting.
The time for formation of the drop is:
Drop time
t.drop
=
Drop size
×
40 ms
Rot.speed
0, 200, 400, ..., 3000 /min; 2000 /min
Rotational speed of RDE
Setting of the rotational speed of the RDE (Rotating Disk Electrode) for
manual operation (revolutions/min).