120
c
HAPTER
6:
Computer Interface Operation
Model 336 Temperature Controller
6.5.4 Embedded Chart
Recorder
The embedded chart recorder utility is provided to allow users to easily acquire and
chart data from the Model 336. The chart recorder utility can simultaneously chart
and log any combination of sensor readings, control setpoints, and heater output
data from the Model 336. A basic user interface is also provided for changing control
parameters on the fly while acquiring data, allowing many basic experiments to be
performed without ever having to write any custom software. Log files are stored in
the Microsoft Excel® .xls format for easy data manipulation. Free utilities are avail-
able online for converting .xls files to comma separated plain text files (.csv) if Micro-
soft Excel is not available.
6.5.4.1 Configuration Panel
The configuration panel is located to the right of the chart and consists of items 12
through 17 in the screenshot above. It is used to configure the charting and logging
functionality for the next data acquisition task. When
Start
is pressed, the parame-
ters in the configuration panel are used to determine:
D
Sample period (13)
: the rate at which to acquire readings from the instrument in
milli-seconds.
D
Number of data points to log (14)
: the number of data points to log if logging to a file.
D
Log file (15):
the path of the file to use for logging data, if logging to a file.
D
Chart only (16)
: if selected, acquired data is only charted, and is not logged to a file.
D
Readings (17)
: the readings, and units (where applicable) to take during data
acquisition.
The configuration panel can be collapsed to increase the size of the chart. To collapse
the configuration panel, simply click on
Collapse configuration panel
(12). When col-
lapsed, the same button becomes an
Expand Configuration Panel
button that can be
used to restore the configuration panel on the form. When data acquisition is in prog-
ress, the configuration panel controls are disabled, but the current settings can still
be seen.
FIGURE 6-11
Embedded chart recorder interface
Содержание 336
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