esca User’s Manual v1.2
The following instructions have to be followed to obtain capacitance and resistance
estimations.
Capacitance estimation:
Activate the “
Triangular Wave
” check box;
Set the best range between 200 pA and 20 nA
(NOTE: for capacitance values
higher than about 17pF select the 20nA range in order to avoid amplifier
saturation)
;
Check that the acquired current is a square waveform;
Click on the “
C estimation
” button.
Resistance estimation:
Be sure the “Triangular Wave” check box is NOT checked;
Set a Vc value between 10 mV and 355 mV;
Check that the acquired current is constant, greater than 0 A and not saturating
the amplifier;
Click on the “
R estimation
” button.
The “
Saturation
” indicator means the input current exceeded the maximum or
minimum current value for the selected Range.
T
RACE
V
ISUALIZATION
The data visualization is based on a freeware dll written by Michael Bernstein (more
info on www.oscilloscope-lib.com).
Click on the “
Show
” button to activate the visualization window that displays the
acquired input current.
The visualization window enables to display up to 3 channel concurrently in a
oscilloscope like approach.
Each beam can be associated to a specific data channel in the EDR GUI. In the case of
ESCA devices, since there is only one channel available, the beams setup in the GUI
can be left unchanged.
In the bottom of the display window there are the buttons necessary to control the
visualization.
In particular, from left to right, these are the button functions:
