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It is suitable for the quality inspection, quality assessment, project quality acceptance, and the practical technology in cathodic protection design and protection effect evaluation of oil pipeline, city gas pipeline oil pipe network (any length) pipe section anticorrosion layer. It tests the frequency response of the frequency signal at the other end of the pipeline by applying the frequency conversion signal to the pipeline, and the test result can be used as the basis for the anticorrosive layer leak detection, maintenance, overhaul and new pipeline coating quality evaluation. China's independent research and development with independent intellectual property rights of innovative products.It has more than 20 years of practice, but also a significant improvement, the technology has been included in the oil and gas industry standards and the Ministry of Construction industry standards.

2.1 Applicable to measure the continuous pipe in any pipe, different diameter, different steel, different coating insulation material, without excavation, without shutting down the impressed current cathodic protection, regardless of whether or not the pipeline branch, In the stray current interference.
2.2 The calculation software has been registered in the test equipment, without CD-ROM, computer overhead, on-site operation of the specific insulation resistance measurement data.
2.3 The introduction of a high anti-jamming filter, so that measurements are not affected by fundamental frequency, harmonics.

'Main Specifications'
Signal source part
3.1 Output frequency range: 15Hz ~ 1000kHz, resolution: 1Hz
3.2 Output level range: -40dB ~ +10 dB
3.3 Output impedance: 0Ω, 75Ω, 100Ω
Receiver section
3.4 Measuring frequency range: 15Hz ~ 1000kHz, resolution: 1Hz
3.5 Measurement level range: -100dB ~ +50 dB
Signal Source Specifications:
Output frequency range: 15 Hz to 1000 kHz
Frequency resolution: 1Hz
Output level range: -40dB ~ 0dB ~ +10 dB
Output level error: ± 0.5 dB
Level resolution: 0.01dB
Output impedance: 0Ω ± 10%
Power supply: DC 7.6V
Ambient temperature: -10 ℃ ~ +40 ℃
Selected frequency table technical indicators:
Measuring frequency range: 15 Hz ~ 1000kHz
Resolution: 1Hz
Measurement level range: +50 dB ~ -100dB,
Measurement level error: ± 0.5 dB
Power: DC rechargeable battery 7.6V
Ambient temperature: -10 ℃ ~ +40 ℃

'Other Indicators'
4.1 Power: 7.6V / 2000mAh, continuous working time of more than 4 hours, the interval of 8 to 12 hours.
4.2 Ambient temperature: -30 ℃ ~ +40 ℃
4.3 Overall dimensions: 185 × 100 × 55mm
4.4 Weight: Signal source: 0.6kg, Receiver: 0.75kg
4.5 Display: all-digital Chinese menu