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page 52
8.2
Parameters for the ring method in Setup
The first two pages of the
the measurement with the plate method. Assumingly, they rarely need to be altered.
Only those parameters which are relevant for the ring method are described here; the
Setup
complete
To open the
.
The parameters which are relevant for the ring method
Speed
and
page of the
8.2.1
Measuring speed
This is where the speed at which the sample stage moves up or down to determine the
maximum force is defined.
The default value of 3mm/min mainly needs to be reduced for interfacial tension
measurements and for small surface tensions, as at higher speeds the lamella can
tear more quickly. This applies chiefly to the
8.2.2
Detection speed
At the start of the measurement the sample stage is first moved upwards. The contact
between the plate and the surface of the liquid is registered owing to the change in
force; the height position is stored for the measurement. The
speed at which the sample stage moves upwards to find the liquid surface.
The default value of 20mm/min is normally suitable. You should not increase it by
much as otherwise the detected surface height becomes less accurate.
Setup
menu is described in chapter 10.
Setup
menu press the key
Detection speed
on the first page and
Setup
menu.
menu contain parameters which affect the course of
Measuring speed
Immersion depth
IFT push
Ring method measurements
Immersing
,
on the second
mode.
Detection speed
is the
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