The Metravi TDRL-912 Cable Fault Locator is specially designed for Telecom Cables and can measure the exact fault location such as the broken line, cross faults, earthing, poor insulation, and poor contact of the lead covered telecom cables as well as plastic telecom cables.

The highlights for this locator are that it can test a number of typical faults, features are as follows: 

• Digital Gain Adjustment Control to make the gain adjustment very easy.
• Digital Waveform Automatic Identification technique to make sure there is no test dead zone.
• Top-grade ARM single-chip micro-computer enables calculations and judge fault waveforms accurately.
• Large colourful LCD display; easy and simple to use.
• A high-energy Li-ion battery provides continuous working capacity for 10 hours (with a special charger). 

Working Principle:

Pulse testing is a kind of remote testing method; one can locate the fault point without testing on the field or testing with end-to-end coordination. The principle of the theory is: The instrument emits a pulse to the line. When the line has faults, the pulse reflection will change. If the input and reflection pulse time can be measured, the location of the fault point can be detected.

Suppose the pulse transmission velocity in electric cable velocity is V, the input and reflection time for the pulse to travel between the test point and the fault point is T, the fault distance is L, then: 2L=VT / L=VT/2 For example, the sending end transmits a pulse to the cable, after 20μs, the sending end get the reflection pulse If the pulse transmission velocity in the electric cable is 201m/μs, the fault distance L is L = 201×20/2 = 2010m.

Types of Faults:

Diagnosis of Fault Characteristics: To ensure the accuracy of the testing of the fault point, the testing personnel has to diagnose the fault characters correctly and then choose the most suitable testing mode. The characteristics of telecom cable faults can be simply divided into the following several kinds:

• Broken line: One or many cable core lines are broken.
• Crossed line: The insulating resistance between the different lines drops and causes communication amplitude drops.
• Earthing fault: The insulating resistance between the core line and the lead cover drops and causes low communication quality.
• Crosstalk noise: When the cable core insulation material is invaded by water or humidity, the insulating resistance drops and causes low communication quality or even blocks.
• Bad insulation: The insulating resistance between different lines and the core drops to a very low level; the communication quality comes under serious influence.

Features:

• Digital Gain Adjustment Control: to make the gain adjustment very easy.
• Digital Waveform Automatic Identification technique: to make sure there is no test dead zone.
• Top-grade ARM single chip micro-computer: enables calculations and judge fault waveforms accurately.
• Display: Large colourful LCD, easy and simple to use.
• Power: High-energy Li-ion battery, provides continuous
• Working Capacity: for 10 hours (post full charge)
• Max range: 8 km (16kms/32kms are optional)
• Highest resolution: 1m
• Dead Zone: 0m
• Power consumption: 1W 

Package Content:

• Fault Locator
• 2 Test Lines
• Charger
• Carrying Bag
• User Manual
• CD with Software & U-Disk (only for USB function)

Please Note that Product may differ eg. colour, size from the product Image displayed on website. Kindly check the specifications provided to make better purchase decision. M.R.P Prices and specifications are subject to change without notice.