19-3
IM DL850E-01EN
• The following character strings cannot be used due to MS-DOS limitations.
AUX, CON, PRN, NUL, CLOCK, LPT1, LPT2, LPT3, LPT4, LPT5, LPT6, LPT7, LPT8, LPT9, COM1,
COM2, COM3, COM4, COM5, COM6, COM7, COM8, or COM9
• Make sure that the full file path (absolute path from the root directory) is less than or equal to 255
characters in length. If it exceeds 255 characters, an error occurs when you perform a file operation (such
as save, copy, rename, or create folder). When an operation is being performed on a folder, the full path is
up to the name of the folder. When an operation is being performed on a file, the full path is up to the name
of the file.
The following additional restrictions apply when you use the file name auto naming feature.
• If you set auto naming to Numbering, file names will be eight characters long. A file name will consist of the
four characters that you entered for the file name and a four-character sequence number.
• If you set auto naming to Date (date and time), the characters that you entered for the file name will not be
used. File names will consist of only the date information.
• Comment (Comment)
You can add a comment that consists of up to 120 characters when saving files. You do not have to enter a
comment. All characters, including spaces, can be used in a comment.
Data Type (Data Type)
Set the data type to binary, ASCII, or floating point.
• Binary (Binary)
• The sampled data stored to the acquisition memory is saved to a file in binary format. The extension is
.WDF. A thumbnail file is also saved at the same time. The thumbnail file can be viewed in the File Property
screen.
• You can load the saved binary format data into the DL850E/DL850EV, display the waveform of the data,
and view the values that it contains. Accumulate is always set to OFF for loaded data.
• If you save a waveform measured using the dual capture feature in binary format, the main waveform data
and captured waveform data are saved to the same file.
• The instrument numbers of the DL850E/DL850EV and each module are saved in the file properties.
However, the instrument numbers of the following modules are not saved.
701250, 701251, 701255, 701260, 701267, 701261, 701262, 701265, 701270, 701271, 701275,
701280, 720210, 720220, 720230, and 720240
• ASCII (ASCII)
• The sampled data stored in the acquisition memory is converted using the specified range and saved to a
file in ASCII format. The extension is .CSV. You can use the file to analyze waveforms on your PC.
• You cannot load the file into the DL850E/DL850EV.
• Waveforms measured using the dual capture feature are saved simultaneously to separate main-
waveform-data and captured-waveform-data files. The captured-waveform-data file is automatically saved
to the same name as the main-waveform-data file with DC added to the end of the file name.
If you configure the record length and the number of channels so that the size of a file would exceed 2 GB,
the file cannot be created.
• Floating Point (Float)
• The sampled data stored in the acquisition memory is converted using the specified range and saved to
a file in 32-bit IEEE floating format. The extension is .FLD. You can use the file to analyze waveforms on
your PC. The data notation is little-endian (Intel format).
• You cannot load the file into the DL850E/DL850EV.
• Waveforms measured using the dual capture feature are saved simultaneously to separate main-
waveform-data and captured-waveform-data files. The captured-waveform-data file is automatically saved
to the same name as the main-waveform-data file with DC added to the end of the file name.
If you configure the record length and the number of channels so that the size of a file would exceed 2 GB,
the file cannot be created.
19 Saving and Loading Data
