YOKOGAWA DTSXL, User Manual, Page: 265 / 289

< PART – C Operation and Maintenance >
C-12
IM 39J06B40-01EN 14th Edition: May 30, 2022
C3. Description of Measurement Data
C3.1. Temperature Distribution Waveform
The DTSX3000 uses the optical fiber itself as the sensing element so data can be
acquired for sections along the full optical fiber length at fixed distance intervals
specified by the sampling resolution. The distance resolution is normally set to 1 m but
data can also be acquired at distance resolutions of 50 cm using multi-sampling
technique. Compared to the measurement time required for 1 m sampling resolution, the
measurement time required for sampling resolutions of 50 cm are 2 times respectively at
the same temperature measurement accuracy.
C3.1.1. Effect of Spatial Resolution
The DTSX3000 has a spatial resolution of about 1 m. If a heated section is shorter than
1 m, the measured value by DTSX3000 indicates the average temperature over a 1 m
section and thus may be incorrect. The DTSX3000 also has a spatial temperature
response of about 1 m so in cases of drastic temperature variation over a distance
shorter than 1 m, the displayed temperature response distance is about 1 m.
Figure Heated Section Length and Temperature Measurement
Heated section
(L)
L
100
T
Actual
temperatur
e
Measured
data
0
20
40
60
80
100
120
0 0.5 1 1.5 2
加熱区間長 L （m)
測定温度差（
℃）
Heated section length, L (m)
M
eas
ur
ed t
em
per
at
ur
e
di
ffer
enc
e (
°C
)