Inst ToolsInst ToolsInst Tools
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Search
  • Books
  • Software
  • Projects
  • Process
  • Tools
  • Basics
  • Formula
  • Power Plant
  • Root Cause Analysis
  • Electrical Basics
  • Animation
  • Standards
  • 4-20 mA Course
  • Siemens PLC Course
Reading: Inspection and Testing of Fiber Optic Cable
Share
Notification Show More
Font ResizerAa
Inst ToolsInst Tools
Font ResizerAa
  • Courses
  • Design
  • PLC
  • Interview
  • Control System
Search
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Inst Tools > Blog > Control Systems > Inspection and Testing of Fiber Optic Cable

Inspection and Testing of Fiber Optic Cable

Learn the procedure for inspection and testing of fiber optic cable drum using OTDR (Optical Time-domain Reflectometer) & Continuity Test.

Last updated: November 3, 2020 5:10 pm
Editorial Staff
Control Systems
No Comments
Share
4 Min Read
SHARE

Testing Procedure for Fiber Optic Cable Drums

  1. One end of the cable drum will be prepared by using the proper tools.
  2. Take the prepared end of the cable inside the splice van to maintain the temperature and dust-free environment
  3. Make the OTDR (Optical Time-domain Reflectometer) ready for testing. When the OTDR is ready, strip the fiber and cleave it by means of a diamond-edged cleaver to ensure the cleaving end should be perpendicular.
  4. Connect the fiber to the OTDR by making a mechanical joint. The mechanical joint will be done by using two connectors coupled to each other through a mechanical coupler.
  5. Now the fiber is ready for testing. Keep the OTDR in average mode and shoot the laser through the fiber for 10 seconds.
  6. When the laser will be off, put the cursor “B” at the end of the cable and Cursor “A” around 80 meters from starting (This 80meters is called Dead Zone, because of the changing in the medium of the laser frequency in a very short distance).
  7. Now note the dB/Km loss of the cable.

a. 1310nm <= 0.4 dB/Km

Contents
Testing Procedure for Fiber Optic Cable DrumsGeneral ChecksOTDR & Continuity TestsTermination ChecksField Device to Patch PanelPatch Panel to Patch Panel / Control Panel

b. 1550nm <= 0.25dB/Km

If the loss is more than the above-mentioned parameter checks the mechanical splice or cleave the fiber again and follow the above procedures again.

  1. If still, the problem persists then there is some problem with the fiber.
  2. Then proceed with the same procedure for all the fibers individually.
  3. All the readings should be witnessed and checked.

Below equipment shall be used to perform the OTDR testing

Test Equipment type:

  • Optical Power Meter

The above procedure is for the fiber optic cable drum testing, upon successful completion of the testing next step is for the installation, inspection, and testing of the fiber optic cable.

General Checks

  1. Check the correctness of cable code & size.
  2. Cable identity and tag number shall be checked.
  3. Proper gland installation.
  4. Cable bending radius shall be checked
  5. Cabinet and/or Joint Box Cover Seals undamaged and Unused Cable Entries plugged correctly.

OTDR & Continuity Tests

  1. OTDR checked before laying of the cable.
  2. Fiber OTDR (for UG Cables) & continuity checked after laying the cable.
  3. OTDR and point to point continuity check after termination.
  4. Final OTDR test results.

Sample report as a reference:

Inspection and Testing of Fiber Optic Cable

Termination Checks

Field Device to Patch Panel

  1. Fibers terminated correctly at the device.
  2. Fibers terminated correctly at patch Panel.
  3. Gland earth tab connected to the patch panel.
  4. Fiber identification correct.

Patch Panel to Patch Panel / Control Panel

  1. Fiber terminated correctly at the patch panel.
  2. Fiber cores terminated correctly at the patch Panel/control panel.
  3. Gland earth tab connected to earth panel.
  4. Fiber identification in patch panel/control panel correct.

Author: Mohammed Khaleel

Read Next:

  • Fiber Optic Cable Splicing
  • Communication Networks
  • History of OPC Protocol
  • DNP3 Communication Protocol
  • Industrial Automation Security
Don't Miss Our Updates
Be the first to get exclusive content straight to your email.
We promise not to spam you. You can unsubscribe at any time.
Invalid email address
You've successfully subscribed !

Continue Reading

Python in Industrial Automation and Control Systems
Control Valve Split Range Example
DCS
How Valve Positioners act as Cascade Control Systems in a Loop?
Basics of Sinking and Sourcing – Automation System MCQ
Chemical Reactor Temperature Control System
Share This Article
Facebook Whatsapp Whatsapp LinkedIn Copy Link
Share
Leave a Comment

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Stay Connected

128.3kFollowersLike
69.1kFollowersFollow
210kSubscribersSubscribe
38kFollowersFollow

Categories

Explore More

Proportional Controller Principle
PLC vs PAC – Understanding the Key Differences and Similarities
Instrumentation Engineer Activities & Documents – Detail Design Phase
What are AI, AO, DI, and DO? – Definition, Examples, Purpose
What is DeviceNet?
Basics of Process Control Systems
Inductive Coupling Effects
Fundamental Motion Control Commands

Keep Learning

Power Supply Unit with Diode Protection

Why we use Diode Protection Modules ?

Integral Control Principle

Integral Controller Principle

Derivative Controller Response

Derivative Controller Principle

Troubleshooting PLC Current Loops

Troubleshooting Current Loops with Voltage Measurement

PID-Controller-Selection

PID Controller Selection

Grounding Electronic Equipment

Importance of Grounding Electronic Equipment

Basic Process Control System

Basic Process Control System

ICS System Design

ICS System Design Considerations

Learn More

Installation and Calibration of Level Transmitter

Installation and Calibration of Level Transmitter

Power Tool Maintenance

Power Tool Maintenance – When And How To Replace Carbon Brushes

Surface Condenser Condensate Evacuation Pumps

Condensate Pump Frequent Wrecks Threatens Long Plant Outages

Electrical Circuit Breaker Quiz

100 Electrical Circuit Breaker Quiz

Basics of Valves Interview Questions & Answers

Basics of Valves Interview Questions & Answers

siemens plc db addressing

FB Block in Siemens PLC Programming

Advantages & Disadvantages of AC power and DC power

Advantages & Disadvantages of AC power and DC power

What is Profibus

All About Fieldbus Protocols

Menu

  • About
  • Privacy Policy
  • Copyright

Quick Links

  • Learn PLC
  • Helping Hand
  • Part Time Job

YouTube Subscribe

Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Welcome Back!

Sign in to your account

Username or Email Address
Password

Lost your password?