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Distance to Fault Test

Do you want to automatically measure the distance to fault without disconnecting adaptation leads?

Systems that use SWR (Standing Wave Ratio) or TDR (Time Domain Reflectometry) do not work well with cable test systems for two reasons:

• The high frequency of the SWR/TDR signal cannot pass through the relay test points of the cable test matrix. This means that faulty test points must be manually removed from the cable tester and connected to a separate meter when a fault is found.
• Vehicle cabling (for Automotive, Aerospace, etc.) involves many splices and connection points which can cause reflections on the SWR/TDR measurement that look similar to the error in the cable. Although a SWR/TDR meter can store the correct waveform for comparison, a small change in the way the cable is positioned, or a change in connector contact resistance, can make locating the true source of the failure difficult

WEETECH has developed a system that can measure the distance to fault automatically without disconnecting adaptation leads. This revolutionary method uses four-wire measurement to detect the location of the short by comparing the resistance between the shorted pins at one end of the cable vs. the other end. The position of an open wire is located by comparing the capacitance of each open pin to the other wires in the bundle. Accuracy is typically better than 2% of the cable length and is displayed graphically.

Check out the following test solutions for details:

• W 427
• W 443
• W 454
• W 629

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