EES-101 Series Ultrasonic Flowmeter
Revision: 3.0.1
Page 64 of 65
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Appendix 6-Operation Instructions of SD Card
12.1
Technical Specifications
Time interval of data acquisition: Optional range 5s~86400s, default is 10s, set via
.
Data storage contents: time/date, flow, flow rate, net accumulation, positive accumulation, negative accumulation
Data storage format:
1=2019-06-04 20:19:14
2=+1.02 m3/h
3=+0.00 m/s
4=+9.01 m3
5=+1.02 m3
6=-9.00 m3
File system format: FAT32
File storage type: In text file (.TXT)
Folder naming format: yyyymm is in the form of 6 digits, where yyyy is the year and mm is the month. For
example, 201905 means May 2019. All the files of the current month are saved in this folder.
File naming format: yyyymmdd file name is in the form of 8 digit numbers in which yyyy represents the year, mm
represents the month and dd represents the day, e.g. 20190514 meaning 2019-5-14.
A new folder should be created every month and a new file should be created every day.
When the SD card runs out of capacity, the earliest monthly file saved will be deleted(the minimum to-be-deleted
unit is month).
When the SD card is working normally, the LED on the signal board is always on, and LED flickers when it
works abnormally. The size of a file = the size of a record x (86400 / interval time), the default record size is 126
bytes, the interval time is 10s, so the size of a file is 126 x 8640 = 1088640 bytes, which is 1088.64KB, That is
1.08864M.
The size of a folder = the number of days in the month * the size of 1 file; for example, the size of 201905 is 31 *
1.08864M = 33.74784M.
The minimum number of folders that can be stored = SD card capacity / the maximum size of a folder; for
example, the default maximum size of a folder is 33.74784M and the SD card capacity is 8G, so the number of
folders that can be stored is at least 242.
Note: The above calculation is for reference only. 1G refers to the theoretical 1G, not the actual 1G. The size of a
record is the size in the default unit, not the size of any unit. The size of a folder is the theoretical size. The actual
size.
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