YOKOGAWA DTSXL User manual

User’s
Manual
IM 39J06B40-01EN
DTSXL
Distributed Temperature Sensor
Long Range System
Guide
IM 39J06B40-01EN
14th Edition

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< Introduction >
i
Media No. IM 39J06B40-01EN
143th Edition May, 2022(YK)
IM 39J06B40-01EN
14th Edition: May 30, 2022
All Rights Reserved Copyright © 2014, Yokogawa Electric Corporation
Introduction
About this Manual
This user’s manual (IM 39J06B40-01EN) describes the overview, operation, and
maintenance of the DTSXL Distributed Temperature Sensor Long Range System
(DTSXL System). This manual is written for all those who will be using the DTSXL
System.
Before using the DTSXL System, read this document and “Read Me First”
(IM 39J06A40-01EN).
Organization of this Manual
This manual consists of the following chapters:
●PART-A Hardware
This chapter describes the hardware of the DTSXL System, including the names,
specifications, locations, and connections for each component unit.
●PART-B Software
This chapter describes the function overview of the DTSX3000 Distributed Temperature
Sensor of the DTSXL System, as well as the tools used to perform various
configurations.
●PART-C Operation and Maintenance
This chapter describes the operation and maintenance of the DTSM System.

< Safety Precautions >
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IM 39J06B40-01EN
14th Edition: May 30, 2022
Safety Precautions
Safety, Protection, and Modification of the Product
• In order to protect the system controlled by the product and the product itself and
ensure safe operation, observe the safety precautions described in this instruction
manual. We assume no liability for safety if users fail to observe these instructions
when operating the product.
• If this instrument is used in a manner not specified in this manual, the protection
provided by this instrument may be impaired.
• If any protection or safety circuit is required for the system controlled by the product
or for the product itself, prepare it separately.
• Be sure to use the spare parts approved by Yokogawa Electric Corporation
(hereafter simply referred to as YOKOGAWA) when replacing parts or consumables.
• Modification of the product is strictly prohibited.
• The following symbols are used in the product and instruction manual to indicate
that there are precautions for safety:
Indicates that warning is required for operation. This symbol is placed on the
product to refer the user to the instruction manual in order to protect the operator
and the equipment. In the instruction manuals you will find precautions to avoid
physical injury or death of the operator, including electrical shocks.
Indicates a caution of high temperature surface.
Indicates a caution of Laser radiation.
Identifies a functional grounding terminal. Before using the product, ground the
terminal.
Indicates a DC supply.

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Notes on Handling Manuals
• Please hand over the user’s manuals to your end users so that they can keep the
manuals on hand for convenient reference.
• Please read the information thoroughly before using the product.
• The purpose of these manuals is not to warrant that the product is well suited to any
particular purpose but rather to describe the functional details of the product.
• No part of the manuals may be transferred or reproduced without prior written
consent from YOKOGAWA.
• YOKOGAWA reserves the right to make improvements in the manuals and product
at any time, without notice or obligation.
• If you have any questions, or you find mistakes or omissions in the manuals, please
contact our sales representative or your local distributor.
Warning and Disclaimer
The product is provided on an “as is” basis. YOKOGAWA shall have neither liability nor
responsibility to any person or entity with respect to any direct or indirect loss or damage
arising from using the product or any defect of the product that YOKOGAWA cannot
predict in advance.
Notes on Hardware
●Appearance and Accessories
Check the following when you receive the product:
• Appearance
• Standard accessories
Contact our sales representative or your local distributor if the product’s coating has
come off, it has been damaged, or there is shortage of required accessories.
●Model and Suffix Codes
The name plate on the product contains the model and suffix codes. Compare them
with those in the general specification to make sure the product is the correct one. If
you have any questions, contact our sales representative or your local distributor.

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Symbol Marks
Throughout this manual, you will find several different types of symbols being used to
identify different sections of text. This section describes these icons.
WARNING
- Identifies instructions that must be observed in order to avoid physical injury and
electric shock or death of the operator.
CAUTION
- Identifies instructions that must be observed in order to prevent the software or
hardware from being damaged or the system from becoming faulty.
IMPORTANT
Identifies important information required to understand operations or functions.
TIP
- Identifies additional information.
SEE ALSO
- Identifies a source to be referred to.

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Safety Precautions for Using the Device
●Standard
SEE ALSO
Different standards are applied according to the types of equipment. For details, refer to the hardware
general specifications (GS) for individual equipment.
Table Compliant Standards
Item Specifications
(✔:Compliant )
Suffix Code (*14)
5:
Non explosion-
proof,
EAC mark
E:
Explosion
proof
Safety Standards (*1) (*2)
CSA C22.2 No.61010-1-04
✔ ✔
EN 61010-1
✔ ✔
EN 61010-2-030 (*3)
✔ ✔
EN IEC 61010-2-201 (*3)
✔ ✔
CU TR 004 (*13)
✔
EMC
Standards
(*1)
CE Marking
EN 55011 Class A Group 1
EN 61000-6-2 (*4) (*5)
EN 61000-3-2 (*6)
EN 61000-3-3 (*6) (*7)
✔ ✔
RCM
EN 55011 Class A Group 1
✔
✔
KC Marking
Korea Electromagnetic Conformity Standard
✔ ✔
EAC Marking
CU TR 020 (*13)
✔
Laser
safety
(*1) (*8)
Class
IEC 60825-1:2007 Class1M,
IEC/EN 60825-1:2014 Class1
✔
✔
FDA(CDRH)
21CFR Part 1040.10
✔ ✔
Standards
for
Hazardous
Location
Equipment
(*1) (*9)
(*10)
FM
Nonincendive
(*2)
Class I, Division 2, Groups A, B, C, D T4
FM 3600-2018
FM 3611-2018
FM 3810-2005
✔
ATEX
Type ”n” (*11)
II 3 G Ex nA ic [op is Gc] IIC T4 Gc X (*12)
EN IEC 60079-0:2018
EN 60079-11:2012
EN 60079-15:2010
EN 60079-28:2015
✔
CSA Non-
Incendive
(*2)
Class I, Division 2, Groups A, B, C, D T4
C22.2 No. 0-10
CAN/CSA-C22.2 No. 0.4-04
C22.2 No. 213-M1987
TN-078
✔
Restriction
of
Hazardous
Substances
RoHS
Directive(*15) EN IEC 63000:2018 ✔✔
Note: Under EU legislation, the manufacturer and the authorised representative in EEA (European Economic Area) are indicated
below:
Manufacturer: YOKOGAWA Electric Corporation (2-9-32 Nakacho, Musashino-shi, Tokyo 180-8750, Japan).
Authorised representative in EEA: Yokogawa Europe B.V. (Euroweg 2, 3825 HD Amersfoort, The
Netherlands).
*1: Not applicable to DTRK10 and DTFB10. Refer to GS 39J06Z40-01EN “DTSXL Distributed Temperature Sensor Long Range
System (for SMF)” in the case of specification of DTSXL for single mode fiber.
*2: To be compliant with these standards, the DTSXL System hardware needs to be installed in a lockable metal cabinet.
*3: Applicable when CPU module NFCP050 is used.
*4: For lightning surge immunity, a device such as a lightning arrester needs to be installed externally to Power cable and
Network cable.
*5: To be compliant with EMC Standards, Mount three ferrite cores “A1190MN” or “A1193MN” to FG cable, Power cable, Network
cable and RS-232-C Communication cables.
*6: Applicable when power supply module NFPW442 is used.
*7: The specified magnitude of the voltage drop determined by the cable wiring length needs be met.
*8: Applicable to DTSX3000.
*9: Refer to IM 39J06B40-01EN “DTSXL Distributed Temperature Long Range System Guide” for the products meeting NI.
*10: For modules conforming to explosion-proof standards, refer to the section Explosion Protection of “COMBINING SYSTEM
COMPONENTS” of this document.
*11: When DTSXL System is used under the ATEX Type ”n” environment, the Instruction Manual, IM 39J06B40-10EN “Explosion
Protection of DTSXL Distributed Temperature Sensor Long Range System under the ATEX Directive” is required for safer
installation and wiring.

< Safety Precautions >
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*12: “X” indicates specific condition of use, in a hazardous area of Zone 2, install DTSXL System in a lockable metal cabinet which
meets the IP54 or higher protection rating provided in IEC 60529.
*13: The EAC mark is as follows.
*14: Refer to each suffix code for DTSX3000, DTOS2L, DTOS4L and DTOS16L.
*15: Including the confirmation of 10 restricted substances defined in the Commission Delegated Directive (EU) 2015/863
amending Annex II to Directive 2011/65/EU.
SEE ALSO
- For details on the power supply modules (NFPW426, NFPW441, NFPW442, and NFPW444) and
CPU module (NFCP050), see General Specifications of the STRADOM FCN/FCJ (GS 34P02Q12-
01E, GS 34P02Q13-01E) and the STARDOM FCN/FCJ Installation Guide (TI 34P02Q91-01E).
- For safety precautions on use of power equipment, see Chapter A3, “Power Supply Equipment.”
- For details on selection and wiring of power cables, see Section A5.1, “Power Supply Wiring.
●Installation conditions
When installing the device, the installation requirements of the device must be satisfied.
Install the device under the following conditions:
Item
Specifications
Power Supply
Power supply Module
Rating
NFPW426
12 V DC
（
3.4 A
）
24 V DC
（
1.7 A
）
NFPW441
100
～
120 V AC
（
1.4 A
）、
50/60 Hz
NFPW442
220
～
240 V AC
（
0.7 A
）、
50/60 Hz
NFPW444
24 V DC
（
3.3 A
）
Ambient Temperature (Operation)
-40
～
65 °C
(*1)
Ambient humidity (Operation)
20 to 80% RH (no condensation)
Installation height
Altitude up to 3000 m (*2)
Installation category based on IEC 61010 *3
Ⅰ、Ⅱ
Pollution degree based on IEC 61010 *4
2
Installation
Indoor use only
*1: 0 to 55 ℃when power supply module NFPW441, NFPW442, or NFPW444 is used.
*2: Altitude up to 2000 m when power supply module NFPW441, NFPW442 or NFPW444 is used.
*3: Installation category is the specification of the impulse withstanding voltage which is termed overvoltage category.
Category I applies to specially protected electrical devices on the secondary side (when NFPW444 / NFPW426 is
used.) Category II applies to electrical devices (when NFPW441 / NFPW442 is used)
*4: Pollution degree represents the level of foreign matter adhesion, solid, liquid, and gaseous, which may decrease the
withstanding voltage.
Pollution degree 2 is applicable to general indoor atmosphere.
●Installation method
Follow the guidance below on how to use this device to guarantee satisfactory safety
and performance.
- Keep the cabinet door of the device closed.
- Confirm that all the empty slots in the cabinet are covered by dummy covers.
- Confirm that all cables are firmly secured with the screws.
- Install rack type devices in the cabinet and lock the cabinet doors for safety.
- Prepare a dedicated circuit breaker in the same room of the device so that it can be
used to cut off the power supply when abnormality occurs. Use this breaker to
shutdown power supply to equipment devices when a device abnormality occurs.
Use a breaker that meets STARDOM power supply specification requirements.

< Safety Precautions >
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IM 39J06B40-01EN
14th Edition: May 30, 2022
●Installation
WARNING
Be careful not to drop and damage the equipment during installation to avoid equipment
damage or injury.
●Wiring Power Cable
WARNING
Connect the power cables according to the procedure given in this document.
The p
ower cables must conform to the safety standards of the country where the device
is installed.
SEE ALSO
For more information about power cables, refer to A5.1 “Power Supply Wiring”.
●Earth Wiring
WARNING
Ground the device following the procedure in this document to prevent electric shock and
to minimize noise.
SEE ALSO
For more information about earth wiring, refer to A5.2 “Wiring the Ground.”

< Safety Precautions >
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●Battery
WARNING
• Yokogawa designated batteries must be used.
•
Mount and change batteries following the procedure given in this document.
SEE ALSO
For more information about batteries, refer to C4.3.1 “Batteries for DTSX3000”.
●I/O Devices
WARNING
To ensure this system compliance with the CSA safety standards, all devices connected
to this
system shall be CSA certified devices.
●Maintenance
WARNING
• When the device becomes dusty, use a vacuum cleaner or a soft cloth to clean it.
•
During maintenance, wear a wrist strap, and adopt other ESD (Electrostatic
Discharge) measures.
●Cables and Connectors
WARNING
When power is ON, Do not install or remove the cables, connectors not listed in this
manual.

< Safety Precautions >
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●Laser Beam
Safety Precautions for Laser Products
This instrument uses a laser light source. This instrument is a Class 1M laser product as
defined by IEC 60825-1:2007 Safety of Laser Products—Part1: Equipment classification
and requirements, and a Class1 laser product as defined by IEC 60825-1:2014 Safety of
Laser Products—Part1: Equipment classification and requirements. In addition, this
instrument complies with 21 CFR Part 1040.10 except for deviations pursuant to Laser
Notice No. 50, dated June 24, 2007.
The table below shows the parameters of the laser light used in this instrument.
Table Parameters of Laser Light
Laser Class
Class 1M(2007)/ Class1 1(2014)
Structure DFB-LD and EDFA
Wavelength
1552 nm
Output power (min. and max.)
3.8 W
Pulse train
Periodic pulse train
Pulse time
Max 10 ns
Pulse repetition cycle
Min 80 µs
The Laser Class label is printed on the front panel of the instrument.

< Safety Precautions >
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IM 39J06B40-01EN
14th Edition: May 30, 2022
WARNING
Invisible laser light is output from the OPTICAL OUTPUT terminal located on the front
face of this instrument.
When Optical switch module connects to DTSX3000 with the
optical fiber, the laser beam is output from optical terminals of Optical switch module.
Do not look directly or indirectly into the laser beam or at a specular reflect
ion of the
beam without protective equipment.
Do not aim the laser beam at the eye. The laser beam may cause blindness or damage
to your eyes. Attach the cover to the optical connector when it is not in use.
Using an optical instrument, such as a
loupe, magnifying glass, or microscope, to
observe the laser beam from a distance of less than 100 mm may cause eye injury.
This instrument uses invisible laser light, which may cause eye injury or vision damage if
it enters the human eye. To prevent accid
ents, always observe the following precautions:
•
Do not turn on laser output when no optical fiber is connected to the optical connector.
•
Always stop laser output before disconnecting the optical fiber from the optical
connector.
•
Never look into the end of an optical fiber connected to the optical connector during
laser output.
•
Never direct the laser beam into an area where a telescope optical instruments (for
example, telescopes and binoculars) are likely to be used.
High
-power laser light may be emitted during disassembly and modification of this
instrument. For this reason, customers must not disa
ssemble or modify this instrument
under any circumstance.
Operating this instrument not in accordance with procedures described in this manual
may result in exposure to hazardous laser emissions.

IEC60825-1:2007
LASER RADIATION
DO NOT VIEW DIRECTLY WITH OPTICAL INSTRUMENTS
CLASS 1M LASER PRODUCT
RAYONNEMENT LASER
NE PAS OBSERVER DIRECTEMENT À L'AIDE D'INSTRUMENTS D'OPTIQUE
APPAREIL À LASER DE CLASSE 1M
不可见激光辐射
勿通过光学仪器直接观看光束
1M 类激光产品

IEC60825-1:2014
CLASS 1 LASER PRODUCT
APPAREIL À LASER DE CLASSE 1
1类激光产品

< Safety Precautions >
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●High Temperature Safety Caution
Figure High Temperature Caution Mark
WARNING
Avoid skin contact. Burn hazard.
When installed in high ambient temperature environments, the instrument
surface may
become hot. Wear thermal protective gloves when touching metallic parts. Avoid direct
skin contact. Beware especially in high temperature installation environments.
Measurement
Before performing distributed temperature measurement:
- Ensure that the environment complies with the DTSXL System specifications, and
- Perform temperature calibration of the sensor optical fiber with DTSXL System.
Drawing Conventions
Some drawings may be partially emphasized, simplified, or omitted, for the convenience
of description.
Some screen images depicted in the manual may have different display positions or
character types (e.g., upper or lower cases). Also note that some of the images
contained in this manual are display examples.

< Copyright and Trademark Notices >
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Copyright and Trademark Notices
All Rights Reserved
The copyrights of the programs and online manual contained in the CD-R are reserved.
The online manual is protected by the PDF security from modification; however, it can
be output via a printer. Printing out the online manual is only allowed for the purpose of
using the product. When using the printed information of the online manual, check if the
version is the most recent one by referring to the DVD-ROM’s version.
No part of the online manual may be transferred, sold, distributed (including delivery via
a commercial PC network or the like), or registered or recorded on video tapes.
Trademark and License Software Acknowledgments
• DTSX and FAST/TOOLS are registered trademarks of Yokogawa Electric
Corporation.
• STARDOM and CENTUM are trademarks of Yokogawa Electric Corporation.
• Ethernet is a registered trademark of Xerox Corporation.
• Windows is a registered trademark of Microsoft Corporation in the United States
and other countries.
• Modbus is a registered trademark of AEG Schneider.
• E2000 is a trademark of Swiss Diamond.
• Other company and product names appearing in this document are trademarks or
registered trademarks of their respective holders.
• Registered trademarks and trademarks in this document are not displayed with TM
or the ® mark.
• The following third-party software is used in the software included in the
accompanying CD-R (or DVD-ROM).
NetAdvantage Icons © 2011 – Infragistics Products

< Copyright and Trademark Notices >
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CONTENTS
Introduction................................................................................................i
Safety Precautions ...................................................................................ii
Copyright and Trademark Notices ........................................................xii
CONTENTS.........................................................................................A-xiv
PART - A Hardware ............................................A-i
A1. DTSXL System..............................................................................A-1
A1.1. Structure and Names of Each Component Unit ................................. A-1
A1.2. DTSX3000 Distributed Temperature Sensor....................................... A-3
A1.3. OPTICAL SWITCH MODULE................................................................ A-7
A1.4. BASE MODULE.................................................................................. A-10
A1.5. RACK MOUNT KIT ............................................................................. A-11
A1.6. OPTICAL FIBER FOR DTSX............................................................... A-12
A1.7. POWER SUPPLY MODULE ................................................................ A-13
A1.8. CPU MODULE .................................................................................... A-13
A2. Installation Environment ...........................................................A-14
A3. Power Supply Equipment ..........................................................A-16
A3.1. Power Supply System ....................................................................... A-16
A3.2. Supplied Power Source..................................................................... A-16
A3.3. Grounding for DTSXL System........................................................... A-18
A4. Installation and Attachment ......................................................A-19
A4.1. Installing the Base Module................................................................ A-19
A4.2. Installing Other Modules onto the Base Module .............................. A-21
A4.3. Considerations on Environment inside Cabinet or Panel................ A-23
A4.4. Noise Considerations........................................................................ A-26
A4.5. Corrosive-gas Environment Compatibility ....................................... A-28
A4.6. FM Nonincendive............................................................................... A-30
A4.6.1. Precaution for Nonincendive ................................................... A-30
A4.6.2. NFM031-A11 .......................................................................... A-33
A4.7. ATEX Type “n” ................................................................................... A-34
A4.8. CSA Non-incendive............................................................................ A-38
A4.8.1. CSA Non-incendive................................................................. A-38
A5. Wiring ..........................................................................................A-42
A5.1. Power Supply Wiring......................................................................... A-42
DTSXL Distributed Temperature Sensor
Long Range System
CONTENTS
IM 39J06B40-01EN

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A5.2. Wiring the Ground ............................................................................. A-45
A5.3. Connecting the Signal Cable............................................................. A-46
A5.4. Routing and Connecting a Sensor Optical Fiber.............................. A-48
A5.4.1. Measurement.......................................................................... A-48
A5.4.2. Routing Sensor optical fibers .................................................. A-49
A5.4.3. Connecting a Sensor optical fiber............................................ A-50
A5.4.4. Disconnecting a Sensor optical fiber ....................................... A-53
A5.4.5. Connecting an Optical Switch Module to the DTSX3000 with
the optical fiber ....................................................................... A-54
A6. Sensor Optical Fiber ..................................................................A-56
A6.1. Choosing Sensor optical fiber .......................................................... A-56
A6.2. Precautions When Choosing Sensor optical fiber........................... A-56
PART - B Software.............................................B-i
B1. Before Using the DTSXL System ................................................B-1
B1.1. Functional Overview of the DTSX3000 ............................................... B-1
B1.2. Functions............................................................................................. B-2
B1.3. Connection...........................................................................................B-6
B1.3.1. Connecting to Control Devices.................................................. B-6
B1.3.2. Connecting to Various Software for DTSX3000 ......................... B-7
B1.4. IP Address Configuration.................................................................... B-8
B1.5. System Configuration........................................................................ B-15
B2. Using the DTSX3000 ..................................................................B-17
B2.1. Operation Flowchart.......................................................................... B-17
B3. Starting and Stopping the System............................................B-18
B3.1. Starting the System........................................................................... B-18
B3.2. Stopping the System ......................................................................... B-18
B4. System Operation.......................................................................B-19
B4.1. Operation Overview........................................................................... B-19
B4.2. Boot Mode Selection State................................................................ B-20
B4.3. IP Address Setting State ................................................................... B-20
B4.4. Loading State..................................................................................... B-20
B4.5. SD Card Installation Check State...................................................... B-20
B4.6. Online State ....................................................................................... B-20
B4.7. Maintenance State ............................................................................. B-20
B4.8. Shutdown State ................................................................................. B-21
B4.9. Test Mode........................................................................................... B-21
B4.10. SD Card Error State ........................................................................... B-21
B5. Communication Functions ........................................................B-22
B5.1. Serial Communication ....................................................................... B-22
B5.1.1. Modbus .................................................................................. B-22

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B5.1.2. RS232 Connection.................................................................. B-22
B5.2. Ethernet Communications ................................................................ B-22
B5.2.1. Login Function ........................................................................ B-22
B5.2.2. HTTP and HTTPS................................................................... B-23
B5.2.3. SFTP/SCP.............................................................................. B-23
B5.2.4. SSH........................................................................................ B-23
B5.2.5. Modbus/TCP........................................................................... B-24
B6. System Configuration ................................................................B-25
B6.1. Overview ............................................................................................ B-25
B6.1.1. Access Procedure................................................................... B-25
B6.1.2. Top Page ................................................................................ B-27
B6.1.3. Operation States and Operation Authority ............................... B-28
B6.1.4. How to Transit between Operation States ............................... B-31
B6.1.5. Auxiliary Information Display................................................... B-37
B6.2. Item List ............................................................................................. B-39
B6.3. Configurable Items in Each Operation State.................................... B-40
B6.4. System Configuration and Display Items ......................................... B-41
B6.4.1. RAS Information Display (RAS)............................................... B-41
B6.4.2. Log Display (Sys log and App log)........................................... B-42
B6.4.3. User Management (User)........................................................ B-43
B6.4.4. Network Configuration (Network) ............................................ B-46
B6.4.5. Date and Time Configuration (Date)........................................ B-48
B6.4.6. Web Server Configuration (Web)............................................. B-55
B6.4.7. SSH & SFTP Configuration (SSH & SFTP) ............................. B-57
B6.4.8. Serial Port Configuration (Serial)............................................. B-58
B6.4.9. PPP Server Configuration (PPP)............................................. B-59
B6.4.10.NTP Server Configuration (NTP) ........................................... B-60
B6.4.11. LED Power Save Configuration (LED) ................................... B-61
B6.4.12.System Configuration Backup (Backup)................................. B-61
B6.4.13.System Configuration Restoration (Restore).......................... B-62
B6.4.14.System Revision Update (Revup) .......................................... B-63
B6.4.15.Save Log (Saveinfo).............................................................. B-63
B6.4.16.Log Alarm Level Configuration (Log Alarms) .......................... B-64
B6.4.17.Reboot/Shutdown (Reboot) ................................................... B-65
B6.5. Application Configuration Items ....................................................... B-66
B6.5.1. Power Save Settings............................................................... B-66
B6.5.2. Modbus Related Settings........................................................ B-67
B6.5.3. Data Conversion Related Settings (Data Convert)................... B-68
B6.5.4. CV Software Related Settings................................................. B-71
B6.6. List of Error Messages ...................................................................... B-72
B7. Temperature Measurement........................................................B-75

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B7.1.Overview ............................................................................................ B-75
B7.2. Measurement Sequence.................................................................... B-75
B7.2.1. Sequence Table Settings ........................................................ B-75
B7.2.2. Sequence Control ................................................................... B-77
B7.3. Channel Settings ............................................................................... B-82
B7.3.1. Fiber Settings ......................................................................... B-84
B7.3.2. Double-ended Measurement Settings ..................................... B-88
B7.3.3. Calibration .............................................................................. B-90
B7.4. Executing Measurement.................................................................... B-92
B7.4.1. Executing Measurement and Checking Status ........................ B-92
B7.5. Optical Switch (optional)................................................................... B-92
B8. Measurement Data Output.........................................................B-93
B8.1. Overview of Data Output ................................................................... B-93
B8.1.1. LAS Files................................................................................ B-94
B8.1.2. CSV Files ............................................................................... B-96
B8.1.3. Format of Measurement Start Time......................................... B-98
B8.2. Executing Data Output ...................................................................... B-99
B8.3. Measurement Data Output ................................................................ B-99
B8.3.1. Specifications of Memory Area................................................ B-99
B8.3.2. File Name Structure.............................................................. B-100
B8.3.3. Archive Directory .................................................................. B-102
B8.4. Retrieving Measurement Data......................................................... B-103
B8.4.1. Retrieving Files Using SFTP Client ....................................... B-103
B8.4.2. HTTP Client Function............................................................ B-109
B8.5. Other Data Output Formats (Option) .............................................. B-116
B9. Alarm Detection........................................................................B-120
B9.1. Overview .......................................................................................... B-120
B9.2. Configuration of Alarm Conditions................................................. B-120
B9.2.1. Number of Alarm Sections .................................................... B-121
B9.2.2. Alarm Section ....................................................................... B-121
B9.2.3. Alarm Conditions .................................................................. B-121
B9.3. Alarm Results .................................................................................. B-124
B10. Sectional Data Generation.......................................................B-126
B10.1. Overview .......................................................................................... B-126
B10.2. Configuration of Sectional Data Conditions................................... B-126
B10.3. Sectional Data Results .................................................................... B-128
B11. Maintenance Functions ...........................................................B-129
B11.1. Displaying System Status Information ........................................... B-129
B11.1.1. Access Procedure ............................................................... B-129
B11.1.2. RAS (Reliability Availability Serviceability) Information ......... B-131
B11.1.3. Checking Alarms ................................................................. B-133

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B11.2. Fault Diagnosis................................................................................ B-135
B11.2.1. Self Diagnosis ..................................................................... B-135
B11.2.2. Display of Fault Diagnosis Results....................................... B-135
B11.3. Log Function.................................................................................... B-137
B11.3.1. System Log File .................................................................. B-137
B11.3.2. Application Log File ............................................................. B-140
B11.4. Checking Security Risks ................................................................. B-142
B11.4.1. Checking for System File Modifications................................ B-142
B11.4.2. Getting Authentication Success and Failure Log .................. B-146
B11.5. Backup and Restore ........................................................................ B-151
B11.5.1. Backup................................................................................ B-151
B11.5.2. Restore ............................................................................... B-154
B11.6. System Revision Update ................................................................. B-160
B12. Using FAST/TOOLS..................................................................B-168
B12.1. Overview .......................................................................................... B-168
B12.2. Retrieving Data Using FTP/SFTP .................................................... B-168
PART - C Operation and Maintenance ............C-i
C1. Operation ......................................................................................C-1
C1.1. Power on/off Procedures and Operation ............................................ C-1
C1.1.1. Power-on Procedure................................................................. C-1
C1.1.2. Power-off Procedure .................................................................C-1
C1.2.Reboot.................................................................................................. C-3
C1.3. System Operation upon Power Failure............................................... C-3
C2. DTS-specific Operation and Precautions...................................C-4
C2.1. Single-ended and Double-ended Measurement ................................. C-4
C2.2. Temperature Calibration.................................................................... C-10
C2.2.1. Temperature Calibration Procedure......................................... C-10
C2.2.2. Temperature Correction .......................................................... C-11
C3. Description of Measurement Data ............................................C-12
C3.1. Temperature Distribution Waveform................................................. C-12
C3.1.1. Effect of Spatial Resolution ..................................................... C-12
C3.1.2. Effect of Internal Reflection in Sensor Optical Fiber................. C-13
C3.1.3. Effect of Signal Processing ..................................................... C-13
C3.2. Temperature Measurement Accuracy ............................................... C-14
C4. Hardware Maintenance ..............................................................C-15
C4.1. Periodic Inspection............................................................................ C-15
C4.2. Maintenance and Replacement Operations...................................... C-16
C4.2.1. Precautions for Operation ....................................................... C-16
C4.2.2. Replacing DTSXL System Modules......................................... C-17
C4.3. Parts with Limited Lifespan .............................................................. C-19