Yokogawa Removable Chassis DX1000N - Manual (Page 321)

App-3
IM 04L41B01-01E
Appendix
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App
Index
Save Duration to the CF Card
We will estimate the duration over which measured data can be saved to a CF card when
measured data is being saved automatically.
Display Data
Save duration to the CF card (estimate) = (Size of the CF card/size of a file)×[file save
interval]
Example 6: We will estimate the save duration to the CF card under the conditions
of examples 1 and 2. In this example, the size of the CF card is assumed to be 256
MB.
256 MB/0.355 MB × 24 h
= 17,307 h
= 721 days
Event Data
Save duration to the CF card (estimate) = (Size of the CF card/size of a file)×[data
length]
Example 7: We will estimate the time until the CF card needs to be replaced
under the conditions of examples 1 and 3. In this example, the size of the CF card is
assumed to be 256 MB.
256 MB/0.893 MB × 2 h
= 573 h
= 23 days
Note
If you format a 256-MB CF card, you will be able to use approximately 246 MB.
Time until the Internal Memory Becomes Full
If you are manually saving the measured data in the internal memory, old data is
overwritten when the internal memory is full. You must save the measured data to the CF
card before the data is overwritten.
Display Data
Time until the internal memory becomes full (estimate) = (Size of the internal memory/
size of a file)×[file save interval]
Example 8: We will estimate the time until the internal memory becomes full under
the conditions of examples 1 and 2. The size of the internal memory is 400 M bytes.
400 MB/0.355 MB × 24 h
= 27,042 h
= 1,126 days
Event Data
Time until the internal memory becomes full (estimate) = (Size of the internal memory/
size of a file)×[data length]
Example 9: We will estimate the time until the internal memory becomes full under
the conditions of examples 1 and 3. The size of the internal memory is 400 M bytes.
400 MB/0.893 MB × 2 h
= 895 h
= 37.3 days
Appendix 1 File Size of Display Data and Event Data