I. Overview PRFJ-9 buried pipeline leak detection coating is a whole new generation of digital, intelligent, multi-buried pipeline leak detection coating. The instrument without digging overburden, conveniently and accurately unearthed buried pipeline location, direction, depth of insulation resistance, coating damage and breakage point size, a preservative. The instrument is currently the most advanced equipment in the ground to detect buried pipeline coating condition, status and location of the pipe corrosion tube corrosion points. The oil, chemical, oil, gas, water and electricity, heating and other departments to ensure the safe operation of the pipeline, improve economic efficiency unit, early detection of pipeline corrosion pitting, corrosion prevention spill necessary testing equipment. Features of the instrument 1, planar design, the keyboard, a key multi-purpose. 2, no additional wiring, by measuring key, it can automatically measure the transmit power, the transmission voltage and emission current, grounding resistance and other parameters. 3, for detecting the signal strength of the whole process, from the inside line for normalized so that the leak size coating and insulation resistance value of each test section comparable. 4, the voltage controlled oscillator frequency technology, the signal intensity of the reaction tube bit and missed the point more clearly. 5, audio, indication, analog bar cursor, displays the signal strength and more intuitive. 6, easy to operate, simple to use, easy to understand. 7, small size, light weight, easy to carry, more suitable for field testing. 8, when the lack of instrument voltage automatic shutdown, automatically cut off the internal power supply shutdown, energy saving effect is remarkable. [Function and use] Function: ★ The instrument without digging casing, and can be easily and accurately unearthed buried pipeline location, direction, depth of insulation resistance, coating damage and breakage point size, a preservative. Uses: ★ According SYJN4029-88 and GJJ33089 pipeline acceptance standards; ★ for newly laid pipes completion and acceptance; ★ according to the pipeline safety regulations regular testing to determine the effect of cathodic protection; ★ competent branch line positioning; ★ old pipeline for testing to determine the pipeline coating condition; ★ to break ground before the excavation of underground pipeline sections distributed checks to prevent damage to underground oil, gas, water, electricity and other pipeline construction. [Features] ★ has a variety of detection methods: can be automatically converted, the shutdown value is automatically saved. ★ can automatically detect pipeline resistance to ground, the output signal modulated radio alarm, anti-interference ability to improve the instrument's detection effect, extending the battery life and life expectancy. [Detection principle and method] ★ detect the direction and principles and methods of buried depth: to send a specific high-frequency modulation signal to determine the location of underground pipes underground pipe through a magnetic field to detect the direction and depth of underground pipes. Detection principles and methods: ★ underground pipes to send a specific high-frequency modulation signal, in the underground pipeline coating damage point of the earth form a loop, and to ground radiation, radiation in the damaged right above the strongest signal to find out the basis of this principle damage point pipeline corrosion layer. ★ A "body capacitance method", is to use the body to do the leak detector sensing element, when staff walked around the leak leak leak detector audible prompts, when walked directly over the leak, horn sound loudest, showing the value of the maximum, to accurately find the point of leakage loss. Second, product performance (a) transmitter technical indicators: 1, the transmitter power: 0-25W, can automatically adjust the servo control 2, the output impedance matching: 0-500Ω, automatic matching 3, launch distance: 0.03-5Km, can 5Km outside gradually move to 4, Power supply: 12V (military NiMH battery pack) 5, the working temperature: -10 ℃ - + 50 ℃ 6, the control system: DSP + vector control, support system upgrade 7, conditioning system: digital keyboard Control 8, Weight: 3.0Kg (including battery) 9 Dimensions: 276mm × 227mm × 98mm (ii) probe tester technical indicators: 1, sensitivity: -65db 2, position deviation: ≤5cm 3, probe depth: ≤ 8m 4, meter distance accuracy: ≤ 0.1% 5 test distance, Power Supply: 9.6V NiMH battery pack 6, Dimensions: 165 mm × 110 mm × 68mm 7, Weight: 0.9Kg (with battery) (iii) Inspection leak detector technical indicators: 1, leak detection accuracy: ≥0.5mm2 2, position deviation: ≤5cm; 3, Power supply: 9.6V NiMH battery pack 4, Dimensions: 165 mm × 110 mm × 68mm 5, Weight: 0.9 Kg (with battery) Third, FJ-9 buried pipeline leak detection coating configure a single instrument the basic configuration of the main pieces of equipment: a transmitter; probe, one Taiwan; leak detector, one Taiwan; accessory equipment : (1) a probe (2) leak detection cable 1 (3) an output line (4), a ground line (5) Earthing bar two (6) a small rasp (7) a magnet ( 8) 12.6V charger one (9) 9.6V charger two (10) fuse 1A two (11) random file set