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Device for determining cable lenth

Device for determining cable lenth

Device for determining cable lenth

(OP)
Does anyone know of an instrument on the market that can be used to determine the lenth of a cable. I have to re-design a PLC remote I/O system and I am limited to 10,000 feet per channel. This is a large sytem and remote racks are very far apart. I need to determine the lenth of my run before I cut the system loose for conversion.
Raven,Joe

RE: Device for determining cable lenth

Time domain reflectometers (TDR) can measure length of cables. See the following for some basic info:

http://www.tscm.com/riprcop.html

RE: Device for determining cable lenth

A TDR or "Time Domain Reflectometer" will give you that information, and also any faults in the cable.
Some high-end oscilloscopes have this built in, but you are generally better off with a dedicated instrument.
They are available for rent, or if you know a telephone linesman, you might persuade him to do it for you.
Riser-Bond is one of the leading brands of TDRs.

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