YOKOGAWA DAQSTATION DX100, Technical Information

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All Rights Reserved. Copyright © 2000, Yokogawa Electric Corporation TI 04L01A01-02E
Event file (. DEV)
The event data file stores data at a high sampling rate so that the data can be analyzed in detail using
a PC. This file is used when storing data when trouble is occurring or when you wish to analyze the
data.
Event file sampling interval
The DX series uses the following measurement interval at all times to acquire data into the A/D
converter. The interval at which the data are stored to the memory is called the sampling interval.
If the sampling interval is set to the measurement interval, all data that are acquired by the A/D are
stored in the memory. You can not specify a shorter sampling interval than the measurement
interval.
Model Measurement interval Event file sampling interval
DX102
DX104
125ms or 250ms
Select from 125,250,500ms,
1,2,5,10,30,60,120s
DX106
DX100
DX112
1sec or 2sec
2 s when the A/D integration time is 100
ms
Select from 1,2,5,10,30,60,120s
DX204
DX208
125ms or 250ms
Select from 125,250,500ms,
1,2,5,10,30,60,120s
DX210
DX220 DX200
DX230
1sec or2sec
2 s when the A/D integration time is 100
ms
Select from 1,2,5,10,30,60,120s
Sampling mode
You can select the sampling mode of the event file from the following choices depending on
whether or not the trigger is used.
Trigger free (FREE) : Acquires data in sync with the start operation.
Data are overwritten when the internal memory becomes full.
Trigger ON (TRIG) : Starts data acquisition when the trigger is activated.
Data acquisition stops when the internal memory becomes full.
Trigger rotate (ROTATE) : Starts data acquisition when the trigger is activated.
Data are overwritten when the internal memory becomes full.
Trigger condition
When the sampling mode is set to trigger ON or trigger rotate, the following triggers can be turned
ON or OFF. When any one of the trigger conditions that is turned ON is satisfied, the trigger is
activated.
Key trigger : Acquires data to the memory when a key is pressed.
External trigger : Acquires data to the memory when an external contact (remote input) is turned
ON.
Alarm trigger : Acquires data to the memory when an alarm occurs.
Pretrigger
When the trigger occurs, you can have the data before the trigger is written to the memory.
Pretrigger : Select from 0, 5, 25, 50, 75, 95, and100%