Ecom EN3 Instruction Manual page 15

To start point measurements or data logger records, insert the SD card as
shown in the SD card slot and let it fully engage.
NOTE
The SD card must have the following characteristics:
min. card volume 32 MB - max.32 GB (UHC)
card formatted on 16 bit FAT or FAT32
CAUTION
Data loss
Never pull out cards during data record - data loss and damaging
of the multi-media-card are possible!
All values of a point measurement are stored in a text file with the name
"J2KDV-xx.txt". The text file is stored automatically in the main directory of
the SD card.
All values of a data logger record are stored in a csv file with the naming
"J2KDL-xx.csv". Sequential files are automatically numbered from 0 ... 99.
The data in the text file and the csv file are stored in the same structure.
You will find further information on the data format in the chapter "Technical
data".
The files can be transferred to a PC using a card reader. Both file types can
be imported or opened using MS Excel.
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