4.2
Data logging
Each WaveGuide system is supplied with internal non-volatile memory (SD card) for data
logging. This can be used as a backup solution while sending data over the network to a
primary data acquisition system. To reduce the chance of corrupting the SD-card during
power failure, it is advised to use an Uninterrupted Power Supply (UPS).
The ’Data Logger’ section of the configuration page in the web user interface (Fig. 4.1)
gives access to the stored data. Folders as well as individual files can be downloaded using
the corresponding download arrow buttons. Depending on the size of the log files, after
clicking a download button it can take up to 3 minutes for the system to compress the files
and start the transfer.
It is also possible to access and transfer the logged data using file transfer protocol by
using ftp://"system IP address". The Login name and password for FTP access are the
same as the user-name and password for modifying settings (by default both user-name
and password are ’radac’)
Figure 4.1: Data logger page.
In the logging directory, sub-directories are created for each parameter. Within the each
parameter folder data text files (one file per day per parameter) are stored.
If the drive is full, a delete mechanism starts. This allows the system to store the most
recent parameters at the expense of the oldest data.
21
