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Shengli SL-3008ACVG Alternating Current 30W Potential Gradient Detector

    The ACVG alternating current potential gradient detector manufactured by Jiangsu Shengli is improved and updated based on the technology of body capacitance method (Pearson), which solves the problems of poor detection effects and low accuracy encountered by body capacitance method (Pearson) in special environments. The performance of ACVG is identical to the test results of DCVG detector.

【Brief introduction to ACVG technology】

    The ACVG alternating current potential gradient detector is made up of three parts: ACVG potential gradient detector, ultralow frequency (close to DC signal) transmitter, and pipe locator. When the ultralow frequency signal (CP) which is close to DC signal is loaded onto the pipelines, the corresponding electric field distribution is established on the ground above the pipeline through the voltage gradient constituted by the damaged points of pipeline anti-corrosive coating and soil. At the location close to the damaged points, the voltage gradient is larger, and thus the current density on the ground above the pipeline is larger. Generally, the larger the exposed area is, the larger the current density nearby and the ground voltage gradient are. The pipe locator detects the location of the pipeline and keeps the ACVG detector on the pipeline, having the ACVG detector determine the damage severity and the accurate position of pipelines through measuring the potential gradient (dB) above the pipeline and the current direction in the soil (CP).

【Technical characteristics of ACVG technology】

Provision of complete information in terms of quantitative detection for anti-corrosive coatings;

Provision of a basis for maintenance work via assessing the severity of damaged points on coating;

Accurate location of damaged points on outer coatings;

Accurate location of the anode ground bed, with higher sensitivity and accuracy.

Analysis of the damage condition on coatings based on the attenuation trend of ACVG signal amplitude gradient

High location accuracy (within 10 centimeters) at the damaged position on the pipeline coating, testing indication easy to read, easy for operation

One of the most precise technologies for coating detection

Able to be applied to the pipelines under urban streets, across rivers (swamps) and below high-voltage lines

Able to be used to test the buried pipelines under concrete and bituminous pavement

Able to test complicated pipe networks, e.g., urban pipe networks, factory and oil storage.

Able to test the buried pipelines adjacent to urban railway, DC having no influence on ACVG technology

【Technical parameters of the transmitter】

Output power: 0-30W

Output mode: Direct link

Working frequency: LF

Power supply: 12V12AH Lithium battery pack

Working time: Approximately 8 hours

Weight: 3.0kg (battery included)

Overall dimension: 274×225×98mm

Quality certification: ISO90012008

【Technical parameters of the pipe locator】

Receive frequency: LF

Gain control: Manual gain, range of 0-140dB

Location accuracy: ±2.5% of depth

Depth investigation accuracy: 3% of depth

Range of depth investigation: 5m

Power supply: 7.4V Lithium battery pack

Working time: 20 hours

Overall dimension: 165×90×68mm

Weight: 0.6kg

Quality certification: IS090012008

【Technical parameters of the ACVG detector】

Receive frequency: LF

Gain control: Automatic gain, range of 0-140dB

Location accuracy: 5cm

Range of depth: 5m

Power supply: 7.4V Lithium battery pack

Working time: 20 hours

Weight: 2.6kg

Quality certification: ISO 9001-2008

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