Yokogawa Standalone MW100 - Manual (Page 225)

5-12 IM MW100-01E
File size: Within approximately 10 Mbyte per file
File size calculation: File size (bytes) = header size *1 + data size *2
*1 Header size (bytes) = Fixed length of 1448 + no. of recording
channels × 232
*2 Measurement data size (bytes) = no. of recording measurement
channels Ч 4 Ч no. of samples
Math data size (bytes) = no. of recording math channels Ч 6 Ч no. of
samples
No. of samples = Data length (s)/recording interval (s)
Ex.) Recording interval: 100 ms; no. of measurement channels, 24; data
length, 10 min.:
Header size = 1448 (bytes) + 24 × 232 (bytes) = 7016 (bytes)
Data size = 24 × 4 (bytes) × (600 (s)/0.1 (s)) = 576,000 (bytes)
File size = 7016 + 576000 = 583016 (byte)
≈ 569 (KB)
Guideline of the sample time for the different CF card sizes (when one type of recording
interval is used):
Number of
Saved CHs
Recording
Interval
Capacity of the CF card
128 MB 512MB 1 GB
10 CHs
10 ms 8.8 hours 35.3 hours 2.8 days
100 ms 3.7 days 14.8 days 28.9 days
500 ms 18.5 days 74 days 144 days
1 s 37 days 148 days 289 days
2 s 74 days 296 days 578 days
24 CHs
100 ms 36.8 hours 6.1 days 12.0 days
500 ms 7.7 days 30 days 60 days
1 s 15.3 days 61 days 119 days
2 s 30 days 122 days 239 days
60 CHs
100 ms 14.8 hours 2.4 days 4.8 days
500 ms 3.0 days 12.3 days 24.1 days
1 s 6.1 days 24.6 days 48 days
2 s 12.3 days 49 days 96 days
5 s 31 days 123 days 241 days
File division: You can use the Event/Action function, status screen operations,
or communication commands to divide files at an arbitrary timing.
Valid when the recording start action is Direct and recording stop
action is Fullstop or Rotate.
File message: The maximum number of characters that can be specified is 120.
The file message can be viewed when the file information is
displayed on the MW100 Viewer Software.
Write message: During execution of the recording action, a message that
corresponds to the recorded data can be included in the file.
No. of characters in message: Up to 15
Messages: 6 (messages 1 to 5, and Free)
No. of write operations: Up to 30 per file
Operation upon failure recovery:
If a power failure occurs during recording, the data up to the
failure is restored upon recovery from the failure. The data after
recovery is recorded continuously to newly created files.
Operation when synchronizing time:
If time synchronization to SNTP is carried out during recording,
the time is saved to the recording log file.
5.2 Main Module (MW100-E) Specifications