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8-3
Data Acquisition and Saving to External Storage Medium
8
8.2
Function to Acquire Display Data and Event
Data
The display and event data are acquired by specifying the channels, sampling interval,
file size, and other information.
Specifying the Data to be Acquired
Display data and event data
Specify the type of data to be acquired depending on the application. Several examples
are shown below. Please use them as references.
Example 1.
Continuously record the waveform data as in the conventional chart-
type recorders.
Select “display data only.”
Example 2.
Continuously record the waveform data and when an alarm occurs,
record detailed data around the alarm incident.
Select “display data and event data.” For the event data, select
“Trigger” or “Rotate” for the mode. Specify the trigger used to start the
event data acquisition and the time period during which to acquire the
data (event data file size).
Example 3.
Continuously record detailed data.
Select “even data only.” Select “Free” for the mode.
Example 4.
Recording is not necessary under normal circumstances. Only record
detailed data around the alarm incident.
Select “event data only.” Select “Trigger” or “Rotate” for the mode.
Specify the trigger used to start the event data acquisition and the time
period during which to acquire the data.
Data Type
Select “display data only,” “display data and event data,” or “event data only.”
Channels to be Stored
Select the channels to be acquired from measurement and computation channels.
Data Acquisition
• Display data
This operation is performed when the type of data acquired is set to “display data
only,” or “display data and event data.”
Data acquisition starts when the START key is pressed and stopps when the STOP
key is pressed.
The display data are overwritten when the display data storage area in the internal
memory becomes full, or the number of files exceeds 16.
The number of display data files is equivalent to the number of times the data
acquisition is started/stopped or the number of files that are segmented by the auto
save interval (during auto save). For details related to the manual save and auto
save, see section 8.4.
Note
•
The display data in the internal memory can be confirmed with the memory summary.
⇒
“Section 4.5”
•
When a power disruption occurs the file is closed.
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