Measuring apparatus, namely electrical cable testers and location [ devices and pipeline testers and location ] devices and pipeline testers and location devices for use in locating electrical cables and pipelines and detecting and diagnosing electrical cable outages, electrical cable faults, and pipeline breaks and leaks, all primarily consisting of high voltage (HV) power supplies for testing instruments, high voltage (HV) testers, and high voltage (HV) surge generators, current supplies, namely electric current sources in the nature of electric current switches; electric search coils, and electric differential search coils; electrical power filters, diode couplers, high voltage (HV) capacitors and capacitor banks composed of electric capacitors, electomagnetic frequency generators, digital and analog tone frequency receivers and transmitters for determining location of electrical cables; electrical test and measurement instrumentation for the underground mining industry, namely, electric signal generators, surge generators; very low frequency (VLF) testers use in alternating current (AC) field testing for testing the dielectric integrity of cables; cable insulation integrity testers, high voltage (HV) resonant testers, hipot (high potential) AC/DC testers, fault converters, insulation resistance testers, relay testers, transformer testers, phasing meters, ground resistance testers, electromagnetic impulse detectors, acoustic impulse detectors; pressure test equipment for pipelines, namely acoustic leak detectors, ultrasonic flow meters, mechanical flow meters, and gas leak detectors; movable and portable detectors for locating pipelines and locating and diagnosing pressure, breaks, and leaks in pipelines in the nature of acoustic sensors and pressure sensors; analog receivers for cable and pipe locating, digital receivers for cable and pipe locating