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But: If a USB cable is plugged in or a WiFi connection to
CASSY Lab 2 or the CASSY App is established, all measured
values already recorded will be lost in the process because
Fig. 5:
To the right of the displayed measurement, there may be other displays indicating any other quantities that are activated, as well as a ta
ble of the measurements and, on the far right, a plot of those measurements. You can switch between the various displays with the keys
and
.
3.6 Evaluations within the table
The table is shown to the right of the displayed measurements
and can be accessed with the arrow keys
fig. 5).
The menu for the table is always selectable via
ble) or from the table view itself by pressing
All activated measured values are stored internally. However,
a maximum of 4 measured values and the time axis can be
displayed. The columns can be freely selected via the table
menu. To scroll in large tables, you need to set Scrolling to
manual in the table menu set; you will then immediately jump
into the table where you can scroll in the table with
Scrolling set to automatic, the last measured line is always
displayed as the bottom line.
3.7 Evaluations within the diagram
A diagram showing a plot of the values is displayed to the right
of the table and can be accessed with the arrow key
Fig. 5).
Normally, values of all quantities activated for measurement
will be shown on the diagram. This can, however, be modified
with the help of the diagram menu.
The diagram menu is always selectable via
gram) or from the diagram view itself by pressing
The menu contains various evaluation functions which may be
selected (e.g. zoom, line fitting, integrals). These are applied
to the currently selected region of the plotted curve.
By default, the selected region is the full length of the first
(black) curve. This can be altered by selecting Range and
then selecting the desired curve.
After this range function has been selected from the diagram
menu, the start and end of the range can be selected via the
rotary knob
and OK, either until both ends of the range
have been defined or a cursor key has been clicked to cancel
the action.
If more than one curve is to be displayed at once, a second y-
axis will automatically be displayed if the display range of the
second curve differs from that of the first. The colour of the
scale divisions for that axis will match the colour of the curve
to which they belong.
Notes on evaluation functions
As long as no ranges have been selected, the zoom function
will zoom into all of the y-axes but not the x-axes. You can on
ly zoom in on the x-axes as well by selecting a range.
the data acquisition will then be completely taken over by
CASSY Lab 2 or the CASSY App.
Multiple subsequent evaluations can be made without deleting
any previous ones. The most recent result of any evaluations
will be displayed in the status bar at the bottom of the dia
and
(see
gram.
3.8 Switching off
(View: Ta
.
The Power Analyser CASSY and the Power Analyser CASSY
Plus are switched on and off via the power switch.
When the device is switched off, the current set of measure
ments and the present settings are erased. Any sets of mea
surements which have been saved are, of course, retained.
. For
3.9 Save
Once a set of measurements has been recorded, it can be
saved via the
be displayed.
The file can either be saved to a USB memory stick with FAT
formatting or to the internal SD card to the Examples sub-fold
(see
er (*.labm) or to the Data sub-folder (*.txt). It is only possible to
write to the internal SD card when the Power Analyser CASSY
unit is NOT connected to a computer.
If the Power Analyser CASSY is connected to a computer via
USB, then it is possible to read and write to the SD card from
(View: Dia
the computer.
.
If the file has been saved as *.labm, then besides the mea
surement data the file also contains all the settings and can be
read by a Power Analyser CASSY 2 again. If the subdirecto
ries exist for the examples directory, these can be selected in
the first level. Furthermore, using Mobile Edit (see section 5.2)
an experiment instruction sheet can be integrated.
If the file has been saved as *.txt, then it can be read using
multiple commonplace programs. The simplest way is to drag
and drop it onto CASSY Lab 2 (see section 5.7) while that
software is running. Even the demo version of CASSY Lab 2
is equipped for this, meaning that no activation code is re
quired.
3.10 Meaning of LEDs
The LEDs beside the display indicate various operating states.
Green: Displayed briefly when switching on.
Flashing green: During the course of an actual measurement
(see section 4.4) or a firmware update (see section 4.15).
Yellow: The internal SD card or an external USB stick is being
accessed.
© by LD DIDACTIC GmbH · Leyboldstraße 1 · D-50354 Hürth · www.ld-didactic.com
Tel: +49-2233-604-0 · Fax: +49-2233-604-222 · Email: info@ld-didactic.de · Technical alterations reserved
Instruction sheet 727 100
menu (see fig. 4). The filename specified will
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