Data acquisition applications are HTML applets produced
by Measurement System Wizard tool. You create and use
these applications in order to control measurement facilities combined
from several laboratory instruments like digital multimeters or signal
generators. Notice that applications based on
custom templates may significantly
differ from typical application shown on this screenshot:
before you load your application into the Browser window,
you may need to configure individual device
drivers that are used by the application. Usually you load files with
appropriate drivers and change device settings like COM port number and
measurement mode. Purpose of the default control and indication elements of data
acquisition application listed below.
Click Run button to start and stop measurements. When this button is
pressed, Point and Settings buttons are disabled.
Click Point button to perform single point measurement (scanner
feature not used!).
If Scan button is pressed, every measurement cycle is started with
scanner increment command (this button may be not available if application does
not use scanner feature). Actual change of scanner value usually is determined
by the device driver configuration.
If both Scan and Reverse buttons are pressed, scanner feature
is active, but scanner decreases its value at every measurement cycle.
Use Settings button to display application configuration options.
When this button is pressed, Point and Run buttons are disabled.
Application status informs you about current phase of the measurement cycle
(waiting for scanner and/or commutator relaxation delay, averaging measurement
Column labels and current values of columns as they appear in the data window are updated at the end of every measurement cycle.
This area displays front panels of device drivers included into the
application. Keep in mind that device drivers may have arbitrary set of control
and indication elements.
Settings panel contains of three subpanels: Control, Delays
and Scan (if application uses scanner feature). You can select appropriate
subpanel by clicking links from this "menu".
Here you should customize point measurement cycle and control data
Average determines how many subsequent readouts are acquired to calculate
single data point;
Record Control allows you to skip points if change of values in the
selected column is too small;
Click Start New Series button to begin record new
Delays are time intervals between different phases of point
Range Minimum and Range Maximum allows you to execute
selected action when some channel of scanner device achieves predefined
numeric value (must be Minimum<Maximum).