YOKOGAWA Daqstation DX2000, Руководство пользователя

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App-2
IM 04L42B01-01E
• Data Size per Sample
Display Data
(Number of measurement channels×4 bytes) + (Number of external input channels×4
bytes) + (number of computation channels×8 bytes) + 8 bytes (time data)
Event Data
(Number of measurement channels×2 bytes) + (Number of external input channels×2
bytes) + (number of computation channels×4 bytes) + 8 bytes (time data)
• Sampled Data Size per File
Display Data
Data size per sample × file save interval/sampling interval
The sampling interval is determined by dividing the trend interval (in seconds) by 30 (40
if the trend interval is 5 or 10 s).
Example 2 : If the display data of 30 measurement channels, 240 external input
channels, and 10 computation channels is recorded with a trend interval of 30 min/div
(the sampling interval of display data is 60 s) and a file save interval of 1 day (24 h)
(30×4 bytes + 240×4 bytes + 10×8 bytes + 8 bytes)×24 h×60×60/60 s
= 1,168 bytes×24 h×60×60/60 s
= 1,681,920 bytes
Event Data
Data size per sample×data length/sample rate
Example 3 : If the display data of 30 measurement channels, 240 external input
channels, and 10 computation channels is recorded with a sample rate of 1 s and data
length of 2 h
(30×2 bytes + 240×2 bytes + 10×4 bytes + 8 bytes)×2 h×60×60/1 s
= 588 bytes×2 h×60×60/1 s
= 4,233,600 bytes
Size per File
The size per file is the sum of the size of information other than the sampled data and the
size of the sampled data.
Display Data
Example 4 : If recording under the conditions of examples 1 and 2
From examples 1 and 2, we obtain 60,938 + 1,681,920 = 1,742,858 bytes = 1.662 M
bytes
Event Data
Example 5 : If recording under the conditions of examples 1 and 3
From examples 1 and 3, we obtain 60,938 + 4,233,600 = 4,294,538 bytes = 4.096 M
bytes
Appendix 1 File Size of Display Data and Event Data