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< PART – B Software >
B-75
IM 39J06B40-01EN 14th Edition: May 30, 2022
B7. Temperature Measurement
B7.1. Overview
The DTSX3000 supports both single-ended and double-ended distributed temperature
measurement. In single-ended measurement, a light pulse is launched from one end of
the sensor optical fiber and the returned Raman scatter is measured to determine
temperature distribution. In double-ended temperature measurement, a light pulse is
launched from each of the two ends of the sensor optical fiber and the returned Raman
scatter is measured separately to determine temperature distribution.
<Single-ended measurement>
<Double-ended measurement>
B7.2. Measurement Sequence
You can define the execution order within one measurement sequence using a
sequence table as described later in Subsection B7.2.1, “Sequence Table Settings” and
then define the execution order between measurement sequences using sequence
control as described in Subsection B7.2.2, “Sequence Control.”
B7.2.1. Sequence Table Settings
Each setting can be written to its associated register in the DTSX3000 via Modbus.
For ease of understanding, we describe each setting using sample screen captures of
the configuration windows of the DTSX3000 Control Visualization Software (DTAP3000),
which is available as a separate purchase.
SEE ALSO
For information on the mapping between individual items in the configuration windows and the Modbus
registers, see the DTSX3000 Communications Guide (IM39J06B40-02EN).
Sensing fiber Sensor optical fiber
Sensing fiber
Reverse
Forward Near end
Far end
Sensor optical fiber