Sensornet ORYX DTS, User Manual

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Page 42 Oryx DTS User Manual v4
Under the ‘Root’ folder, there will be a folder for each Oryx that is connected, or has
been connected, to the base unit. This ‘Oryx ID’ folder will have a name equal to the
serial number of the DTS. All data, system and log files pertaining to a particular
Oryx device are stored within this ‘Oryx ID’ folder.
ORYX DATA FILES
The Oryx DTS can generate different types of distributed data file that are stored
permanently on the hard disks of the base station server or on a network share.
These can be read using Sensornet ORYX Data Viewer (ODV) software or using
other tools such as FloQuest software or simply imported into spreadsheet
applications. The two types of text file are called Full Data and Temperature Only
data files. The ODC software can also generate XML files (industry standard
WITSML format), that can be imported into database applications.
A “latest” folder contains only the last (most recent) data for a specific ORYX, these
files are overwritten with each new measurement. This fixed directory is useful for
automatic downloading of the data files on a regular basis
The system generates historic data, with the files saved in a
“Installation_name/Channel/Year/Month” hierarchy as shown in Figure 26.
Full Data Set files are the complete data set generated by the Oryx DTS system
after every repetition of the measurement cycle. These contain the distributed
temperature data, raw signal data and various installation details – name, time, date
etc. These data files have a .ddf file extension.
NOTE: The date and time of the file as reported by the Windows OS, is simply the
date and time the data was downloaded from the Oryx and may not correspond with
when the log was taken.
The *.dtd files stored under the temperature only directory contain a simplified
header structure and only the temperature data in a single column with the first two
numeric values being the start distance and the distance step size respectively. The
values following are the temperature data recorded at each incremental distance
step.
To import the data files into a spreadsheet, load the file via the ‘all file types’
extension. An example of the *.ddf file is shown in Figure 27.
It is worth noting that aside from the distributed temperature sensing data, the
header section contains information such as the date and time of measurement,
various measurement parameters, a data status field and some calibration
constants used by the Oryx DTS. These constants are used in the optical
performance calculations performed by the Sentinel DTS and may be required by
Sensornet Ltd in case of a calibration error.