12-25
IM 701450-01E
12
Saving and Loading Data
Explanation
Data Type and Extension
Binary
• The sampled data in the acquisition memory is saved in binary format.
• The data that is saved can be loaded to display the waveform and compute numeric data.
•A header file that is used when analyzing the waveform on a PC is automatically
created. The header file cannot be opened on the DL7400. For details on the header
file format, see appendix 3.
• The extension is .WVF. The extension of the header file name is .HDR.
• When saving waveform data in binary format, a header file is automatically created
with the extension .HDR. When the DL7400 is used to copy, delete, change the
names of, or change the file attribute of waveform data files (files with .WVF
extension), the header files are automatically updated to reflect the changes. Do not
delete only the header file or only the waveform data file, as this may cause a system
malfunction.
ASCII
• The units of the sampled data in the acquisition memory are converted per the
specified range and saved in ASCII format. The data can be used to analyze the
waveform on a PC.
• The file cannot be loaded into the DL7400.
• The extension is .CSV.
Float
• The units of the sampled data in the acquisition memory are converted per the
specified range and saved in 32-bit floating format. The data can be used to analyze
the waveform on a PC.
• The order of the data is little-endian (Intel format).
• The file cannot be loaded into the DL7400.
• The extension is .FLD.
Data Size
The following table shows the data size when the record length is set to 100 kW,
waveform data of CH1 to CH4 are saved, MATH1 and MATH2 are turned OFF, and
using history waveform 1 condition.
Data Type Extension Data Size (Bytes)
Binary .WVF Approx. 850 K ((100 kW + 32) × 4 channels × the number of
history waveforms × 2 + 46 K)
.HDR Approx. 2 K (approx. 3 K when Math1 and Math2 are ON)
ASCII .CSV 4 to 5 MB
Float .FLD Approx. 1.6 M (((100 kW + 32) × 4) × the number of history
waveforms × 4)
Waveforms to Be Saved
• You can save all the waveforms or the selected waveform from CH1 to CH8(4)*,
Math1, Math2, Pod A, and Pod B.
* You can select up to CH4 or CH8 on the DL7440 and DL7480, respectively.
• The setup data including vertical axis, horizontal axis, and trigger of the waveform to
be saved is also saved.
• For waveforms that are loaded using the history memory function, you can select
whether to save all of the history waveforms or save just the current displayed
waveform on the screen. You can also save only the results obtained by searching
the history waveforms. For a description of searching the history waveforms, see
section 10.2 or 10.3.
• For a description of snapshot waveforms, see section 12.9.
12.8 Saving/Loading the Waveform Data
To Next Page
Loading...
Need help?
General
