Omega RD-MV100 Series, User Manual

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8-5
Data Acquisition and Saving to External Storage Medium
8
Mode Description
Rotate When the internal memory is not divided into blocks :
One event data file is created in the internal memory.
Press the START key to enter the trigger wait state.
After the trigger is activated, data are acquired for the specified time (data length,
see section8.11) and the operation is stopped. Data are overwritten when the
trigger is activated again. Every time the trigger is activated during the trigger
wait state, data are overwritten. Press the STOP key to terminate dtata
acquisition.
Data acquisition
Trigger activated
Trigger wait
When the internal memory is divided into blocks :
An event data file each in the blocks is created.
Press the START key to enter the trigger wait state.
After the trigger is activated, data are acquired for the specified time (data length,
see section8.11) and the operation is stopped. When the trigger is activated
again, data are acquired and stored to the next block. When all blocks are full
and the trigger is activated, data are overwritten to the first block. Every time the
trigger is activated during the trigger wait state, data are overwritten to the next
block. Press the STOP key to terminate data acquisition.
Data acquisition
Trigger wait Trigger wait Trigger wait
Trigger activated Trigger activated Trigger activated
First block
Data acquisition
Second block
Data acquisition
Last block
Note
• The event data in the internal memory can be confirmed with the memory summary.
⇒
“Section 4.5”
• When a power failure occurs, the event data file in the internal memory is closed as one file.
Pre-Trigger for the Event Data
Pre-trigger is applied to the event data with [Trigger] or [Rotate] modes.
You can have event data before the trigger point be stored.
It is specified in terms of a percentage of the data length (0, 5, 25, 50, 75, 95, 100%). If
0% is selected, all data are after the trigger point. The initial setting is 0%.
Trigger Type for the Event Data
When [Trigger] or [Rotate] is selected, the trigger type is selected by turning each type of
trigger ON/OFF. The triggers operate in an OR fashion : the trigger is activated when
any of the conditions that are turned ON are satisfied.
Type Description
Key trigger The trigger condition is satisfied when the FUNC - [Trigger] soft key is pressed.
External trigger The trigger condition is satisfied when the external contact specified by Remote
Control function is turned ON. See section 10.9.
Alarm trigger The trigger condition is satisfied when any of the alarms occur.
8.2 Function to Acquire Display Data and Event Data