Grewin High Quality Electronic Testing System Tdrl-901cable Fault Locator

• Customization: Available
• Connectors: Terminal
• Test Mode: Instant Test
• Model NO.: TDRL-901
• Usage: Network Cable Tester, HDMI Cable Tester, Audio Cable Tester, Coaxial Cable Tester, Digital Cable Tester
• Test Region: Forming Cable
• Cable Type: Customized
• Power: Electricity
• Certification: CE, FCC, RoHS, IEC
• Customized: Non-Customized
• Color: White
• Automatic Measurement: Easy to Operate
• Auto Power-off: Recharge Battery
• Friendly User Interface: Easy to Carry
• Measurement Distance: 0-8km
• Resolution Ratio 1: 0-1km, Below 1m
• Resolution Ratio 2: 2km, Below 2m
• Resolution Ratio 3: 4-8km, Below 8m
• Impulse Range: 30V
• Impulse Width: 80ns-5μs
• Blind Zone: 1m
• Transport Package: Carton or Pallet
• Specification: portable
• Origin: China
• Production Capacity: 5000000

Product Description

Grewin high quality electronic Testing system TDRL-901Cable Fault Locator 

Introduction

This Cable Fault Locator (hereafter referred as locator) can measure the exact fault location such as the broken line, cross faults, earthing, poor insulation and poor contact of the lead covered cables as well as plastic cables.
The highlights for this locator are that it can test numbers of typical faults, features are as follow:

1. Digital gain Adjustment control to make the gain adjustment very easy.

 

1. Digital waveform automatically Identify technique to make sure no test dead zone.

 

1. Top grade ARM single chip micro computer can make calculation and judge the fault waveform exactly.
2. Large colorful LCD display; humanized operation interface; six function keys can do all the tests.
3. High-energy Li battery, continuous work 10 hours (with special charger).

 

Measurement distance	0-8km
Resolution ratio	0-1km,below 1m; 2km,below 2m; 4-8km,below 8m
Impulse range	30V
Impulse width	80ns-5μs,auto adjustments
Blind zone	1m
Wave velocity range	100-300m/μs
Adjustable gain range	0-80db
Supply power	AA battery x 6pcs
Volume	225mm×155mm×50mm
Weight	0.42kgs without battery
Operating Temperature	-10ºC-40ºC
Humidity	5-90%RH
Elevation	<4500m

working principle&Product Structure

Basic working principle

Distance locating:

This device using TDR(Time Domain Reflectometry).When locating,low voltage pulse is injected into and spread along the cable until reach the impedance mismatch point.These points include the short circuit point, fault point,middle connector and so on.When reach these points,the pulse reflection will be send back and record.See Figure.1

Figure 1 shows a fault point in a cable, Δt is the time during transmitted pulse and pulse reflection is received,so fault point distance Lx :

V:pulse Traveling-wave speed.

lDevice configurations

T-950 cable fault locator including main engine, testing lines and documents. 

l Display interface when working

1	Ø Transmitted impulse
2	Ø Battery lever
3	Ø Temporarily store mark
4	Ø Comparing mark
5	Ø Cursor
6	Ø Distance
7	Ø Reflection impulse of cable fault point
8	Ø Wave velocity
9	Ø Measuring range
10	Ø Gain
11	Ø Display scale

 

Application

Fault determined

When cable fault appeared, pls first judge fault feather and broken lever. The TDR fault are divided into three kinds as below:

Disconnection fault: cable broken and communication

disconnect.

Crossing fault which is generally classified into three kinds:

grounding fault, self-crossing fault, and common crossing. During these conditions, the insulating layer was broken even touched to affect the communication quality.  

Defective insulation fault:

Choose testing range

To get complete testing waveform,the testing range should

be several hundred meters longer than the length of the cable.For example,if the cable is 900m,the testing range should be 2km.when found the fault point closer,reduce the range accordingly.

This device offer below six testing ranges to choose, 125m,  

250m,500m,1km,2km and 4km.

Press 1 or 2 button to change the testing range.Check

'basic function' for reference.

Pls notice that,the device test once automatically after once range changing.

The cable corn is entranced by moisture or water to reduce the insolation resistance.The difference between this and above crossing fault is this has a big resistance, common over thousand Ohms.  

In generally, for above first and second fault, it's easy to detect by pulse test, but for the third, user should consider the cable path, time of fault, range of the fault, environment and so on.

Instrument Maintenance Charge

Standard configuration is 6AA NI-MH battery ,capacity above

1300mAH is better. Dry battery is also ok if no NI-MH battery if necessary but need high capacity ones.

*Please notice don't put the battery backwards.

Contact Information:       
 
Tianjin Grewin Technology Co.,Ltd.
Website:transformer.en.made-in-china.com