Sensornet Sentinel DTS, Быстрый старт

Страница: 16 / 24

Page 12 Sentinal DTS Quick Start Guide SEN2-QSG1.0
TEMPERATURE SLOPE CORRECTION
When creating or editing a configuration file, temperature slope correction can be
applied. Temperature slope correction is used to remove any length dependency of
the temperature values for optical fibre. Length dependency manifests itself as a
gradual slope in the distributed temperature sensing trace over the length of a
uniform area along the optical fibre. Temperature slope correction is normally
performed by entering a predetermined fixed value or by referencing two regions of
the optical fibre that have a uniform temperature. The exact temperature of the
region is not required. The Sensornet DTS software automatically calibrates the
trace as required.
TEMPERATURE OFFSET
Temperature offset allows the user to calibrate the absolute temperature values for
the Sentinel DTS. This is normally performed by entering a predetermined fixed
value or by referencing a section of the optical fibre in a specific region with the
temperature values of a reference probe or region of known temperature.
CHART RECORDER POINTS
Chart recorder points are used to monitor specific points of interest along the optical
fibre. Once chart recorder points are created they can be viewed in real time while
measurements are being taken. The values are displayed as temperature vs time.
TRACE AVERAGING
Trace averaging allows the user to specify the measurement time and amount of
spatial averaging applied. The measurement time is the amount of time the Sentinel
DTS averages distributed temperature sensing data before displaying it on the
graphical display. By increasing the measurement time, better temperature
resolution can be achieved. Spatial averaging is used to remove any unwanted
random variability or noise from the trace. Increasing the value of spatial averaging
can remove noise and smooth out the trace but this may also remove useful
information. Unless the desired temperature resolution cannot be obtained by
increasing the measurement time, Sensornet generally recommends leaving the
spatial averaging on the default measurement setting. Both measurement time and
spatial averaging are applied by entering a predetermined value or adjust the trace
using the sliders.