Yokogawa Touch Screen GP20 - Manual (Page 379)

App-3
IM 04L51B01-01EN
Appendix
1
2
3
4
5
App
Save Duration to the SD Memory Card
We will estimate the duration over which measured data can be saved to an SD memory
card when measured data is being saved automatically.
Display Data
Save duration to an SD memory card (estimate) = (Size of the SD memory card/size per file)
× [file save interval]
Example 6: We will estimate the save duration to an SD memory card under the conditions
of examples 1 and 2. In this example, the size of the SD memory card is assumed to be 1
GB.
1 GB/1.541 MB × 24 h
1024 MB/1.541 MB × 24 h
= 15,948 h
= 664 days
Event Data
Save duration to an SD memory card (estimate) = (Size of the SD memory card/size per file)
× [data length]
Example 7: We will estimate the time until the SD memory card needs to be replaced under
the conditions of examples 1 and 3. In this example, the size of the SD memory card is
assumed to be 1 GB.
1 GB/3.853 MB × 2 h
1024 MB/3.853 bytes × 2 h
= 531 h
= 22.1 days
Note
The available size of an SD memory card is somewhat less than the size indicated.
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. The maximum number of files that can be saved to the
internal memory is 500. Depending on the file size, files may be overwritten before the
internal memory becomes full. You need to save the measured data to the SD memory card
before the data is overwritten.
Display Data
Time until the internal memory becomes full (estimate) = (Size of the internal memory/size
per 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 internal memory is standard (500 MB).
500 MB/1.541 bytes × 24 h
= 7,787 h
= 324 days
Event Data
Time until the internal memory becomes full (estimate) = (Size of the internal memory/size
per 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 internal memory is standard (500 MB).
500 MB/3.853 bytes × 2 h
= 259 h
= 10.8 days
Appendix 1 File Size of Display Data and Event Data