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< PART – A Hardware >
A-3
IM 39J06B40-01EN 14th Edition: May 30, 2022
A1.2. DTSX3000 Distributed Temperature Sensor
The DTSX3000 measures temperature distribution using optical fiber (not included in
this specification) as the sensing element.

Specifications
Table Specifications of DTSX3000 Distributed Temperature Sensor (*12)
Item Specifications
Distance range suffix code -S -N -M -L
Distribut
ed
tempera
ture
measur
ement
(*1)
Distanc
e (*2)
Measurement distance
range
6 km, 10
km,
6 km, 10 km,
16 km
6 km, 10 km,
16 km, 20 km,
30 km
6 km, 10 km,
16 km, 20 km,
30 km, 50 km
Sampling resolution (*3) 0.5 m, 1 m, 2 m
Spatial resolution (*4) 1 m or less
Temper
ature
Measurement temperature
range
-200
～
+800 °C (*5)
Temperature resolution (*6)
(10-minute measurement,
1 σ, without optical switch)
Distance range
10 km
16 km 30 km 50 km
Max. Value 0.03 ° C 0.06 ° C 0.2 ° C 2.6 ° C
Typical Value(*7) 0.02 ° C 0.03 ° C 0.1 ° C 1.6 ° C
Sensor optical fiber
Optical fiber (*8) 50/125 μ m GI, closed end, non-reflection required
Optical connector E2000/APC
Interface
Serial
(RS-232C)
3 ports, non-isolated, RJ45 modular jacks Full duplex,
asynchronous
SERIAL 1
Function: Communication (Modbus)
Baud rate: 1.2, 2.4, 4.8, 9.6, 19.2, 38.4 57.6, 115.2 kbps
SERIAL 2
Function: Communication (Modbus)
Baud Rate: 1.2, 2.4, 4.8, 9.6, 19.2, 38.4 kbps
SERIAL 3 (*9) Function: Maintenance (Private)
Network interface LAN
1 port, 10BASE-T (*10) or 100BASE-TX,
RJ45 modular jacks, automatic negotiation, automatic MDI,
with power switch (ON/OFF)
Display LEDs : HRDY, RDY, LASER ON
Power
supply
Consumption Operating mode
16 W
Power save mode 2.1 W
Dimensions (W
×
H
×
D) 197.8
×
132.0
×
162.2 mm (6 slots width) (*11)
Weight 2.5 kg
*1: Temperature calibration of the Sensor Optical Fiber for DTSX3000 is required before temperature distribution
measurement.
*2: Indicated nominal values vary with the refractive index of the optical fiber.
*3: Sampling range is 2 m for 50 km range; selectable from 1 m and 2 m for 20 km and 30 km range; and selectable
from 0.5 m, 1 m and 2 m for other distance ranges.
*4: The spatial resolution (sometimes known as the response distance) is the distance between the 10 % and 90 %
points on the DTS response to a step temperature change in the near end part of the optical fiber under 16 km
distance range or less and 0.5 m sampling.
*5: This range depends on the temperature range of the sensor optical fiber.
*6: The given values indicate one standard deviation over distance for measurements of uniform temperature 20°C with
no coupling loss and fiber attenuation of 0.25 dB/km for stokes
light and 0.25dB/km for anti-stokes light. Time values indicate
hardware measurement time in fast measurement mode at
sampling resolution of 1 m (2 m for 50 km range) A 100 meter
section each at the near end and the far end of the optical fiber is
excluded. The temperature resolution changes near a
temperature change location or a fiber connection point. (The
diagram on the right shows the graph for 1 m sampling as a
reference case); how the temperature resolution changes
depends on the fiber length, measurement time and excess loss.
*7: These values indicate typical performance at 23 °C ambient
temperature but are not performance specification values.
*8: Sensor optical fiber splicing must be by fusing splicing. Sensor
optical fiber connection loss must be 0.3 dB max. and no more than 0.15 dB on average
*9: SERIAL 3 of RS-232C is dedicated for maintenance use.
*10 A repeater hub cannot connect.
*11: Dimensions exclude protective cap of optical connector.
*12: Refer to GS 39J06Z40-01EN in the case of specification of DTSXL for single mode fiber.