Check the listing for details. Psiber Data CableTool CT-50 Multifunction Cable Meter with Case and Leads. Condition: Used. Listed at 99.00 USD. The CableTool model CT50 from Psiber Data Systems provides contractors, CATV, low voltage installers, or anyone involved in the installation or maintenance of metallic cables with the capability to quickly find faults in cables up to a distance of 2500 feet. Using TDR technology, the CableTool diagnoses cable faults with no launch or dead zone and an accuracy to ±2%. Simply select the appropriate cable type from the pre-stored library or enter the cable NVP, attach the leads to two conductors of the cable and with a single press of a button the length of the cable or distance to an open or short is displayed. Voltage on the wires up to 250v is continuously measured by the built in, true RMS voltmeter and is displayed to warn of a potentially unsafe condition. Powers up with no errors. Not tested further.