LabHelper's screen display during data acquisition varies with
operational mode and the number of channels. Users can vary the colors
of the screen stripcharts (from the screen
colors option of the 'VIEW' menu).
The following discussion refers to the built-in "standard"
colors specified in the standard 'LabHelper prefs' file, and may not
be the ones the user prefers.
A typical CHART
mode plot window is shown here:
The plot areas (1 to a maximum of 16) are dark gray,
with pale blue grid lines and lettering. Data are plotted as yellow
lines extending left to right across the screen. The information shown
in the plot areas and the data bar varies with sampling rate. At high
sampling rates, the yellow data bar at the top left of the screen, shows
only the sample number and the maximum number of cases. At slower
sampling rates, the data bar shows the sample number, the time, the percent
completion, the time to go, and the maximum number of cases. If Autorepeat
is selected, a small window in the first channel's plot area shows the current
file name under which data will be stored. Except at high sampling
rates, channel values (the last value recorded for each channel) appear
in the plot area(s); this is under user control. At the bottom of
the plot area are tics showing an elapsed time scale. If one of the
external device control modes is operating, a yellow-on-blue legend reading
" '-' for ref, '+' for sample " appears in the lower part of the
screen below the plot areas. In this example:
- 3 markers ("a", "b", and "c") have been
- channels 1 and 3 are interfaced to external switching devices (both
show periods of 'zero' value, indicating they are not being recorded)
If you are using a 'compressed' view mode (selected with the chart view button on the Display Setup window; not shown here),
the degree of view compression is shown in the lower left of the screen,
together with a graphical index. This old view shows a graphical representation of screen usage in the upper right (small white and green squares); in current versions a progress bar indicates how many samples remain available.
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If your screen is wider than 640 pixels, a small yellow window showing
the backup status appears in the lower right corner (automatic backup is
not selected in this example).
| The Toolbar lets you control acquisition by clicking icons instead of using the keyboard (both options work when the toolbar is visible). You can select either a white or dark toolbar background in the 'Preferences' option in the 'LabHelper X' menu. The icons should be mostly self-explanatory.|
- The red 'X' halts acquisition and opens the Options window (same as hitting the ESC key).
- The '||' icon pauses acquisition and opens a window that lets you adjust channel scaling or sample rate. You can write a short note if you wish; this will appear in the file's comments. Acquisition is halted while this window is open:
- The right triangle resumes acquisition.
- The 'pen' icon lets you enter a note of up to 250 characters in real time (during acquisition); the note(s) can be read when the file is analyzed in LabAnalyst X and are aligned to the time at which the note was written, with a marker in the file. Note that you can edit your text only with the backspace/delete key; clicking the cursor doesn't work. Also, this process may slow sampling if you are acquiring data at high speed:
- The '+' icon adds time (same as hitting the 'Return' key).
- The 'circling arrow' icon opens a window that plays back the entire set of acquired data; acquisition continues in the background. Hit the 'resume' icon (right triangle) to close this window.
- The 'hourglass' icon shows the time remaining until the next reference reading.
- The 'disk + clock' icon forces an immediate backup save.
- Finally, the icon with up and down triangles switches between reference (click the bottom half with the downward-pointing triangle) or sample (click the top half).
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Markers (to indicate important events, timing, or other uses) are entered
by hitting any letter or number key; they appear as vertical lines on the
plot areas. Markers are stored in the data file and can be displayed
during data analysis. To enter the Options
window (for saving data and other operations), hit the ESC key.
mode, the single plot area is dark blue, with pale blue grid lines and white
lettering. Data points are in yellow. The data bar shows only
the maximum number of points on the screen. A small window in the
plot area shows the file name and suffix under which the next screenfull
of data will be stored. At the bottom of the screen are instructions
for saving screens of data (hit the TAB key), or exiting to the Options window (hit the ESC key; see below).
At the bottom of the plot area are tics showing an elapsed time scale.
Markers are not allowed in Oscilloscope mode.
- If you are coming to the end of a chart record and you need to continue
recording, hit the 'return' key, or click the toolbar '+' icon. This will add another screenwidth
of cases to the maximum number of cases (up to the maximum sample size).
This works in both CHART and SCOPE + CHART modes.
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PLUS CHART mode, the topmost plot area functions like the regular Oscilloscope
mode, with dark blue plot area, pale blue grid lines, white lettering, and
erasable yellow data points. During intermittent sampling, the plot
area for scope data is red, not blue. The plot areas for chart channels
are the 'usual' dark gray, with light blue grid lines and lettering, and
yellow data lines. The data bar shows the trace length of the chart
screen, and at slow oscilloscope sampling rates it also shows the number
of points recorded on the chart channels. A small window in the plot
area for the scope channel shows the file name under which the next screenfull
of data will be stored. Channel values do not appear, and markers
appear only in the plot areas for chart channels. Markers can be entered
by hitting any letter or number key, or they can be entered automatically
by the computer when oscilloscope screens are saved. Automatic markers
are a sequence of numbers running from 0 to 9, with the sequence repeating
up to a total of several thousand markers. You can still enter markers manually
by hitting any letter or number key.
The view compression and screen indicators are as described for chart
To store the currently-displayed oscilloscope screen, hit the TAB key.
To enter the Options window (for saving
the chart channels and for other operations), hit ESC. At the bottom
of the plot area are tics showing an elapsed time scale.