Overview
The DJ-9 spark detector is a pulsed high voltage instrument produced by KODIN, which is dedicated to detecting the mass of metal anti-corrosion coatings. Compared with the DC Holiday Detector, the instrument reduces the spark Impact damage to the anti-corrosion layer and adds the leakage point memory function, which helps to improve the work efficiency. It is suitable for the detection of coatings such as Glass-lined, frp, epoxy coal asphalt and rubber lining of different thicknesses. When the coating has pinholing, bubbles, cracks or crazing, the instrument will emit bright sparks, accompanied by sound and light alarms. The instrument is powered by batteries, which is especially suitable for field operations.
Features
1. Adopt pulsed high voltage technology to reduce spark Impact damage to anti-corrosion coatings.
2. With leak point memory function, the maximum memory can be 99 leak points.
The detection voltage range is wide, covering 0.5KV to 30KV.
4. Wide range of detection thickness, suitable for coatings from 0.5mm to 10mm.
5. Powered by 12V DC battery, low power consumption (about 6W), easy to carry, especially suitable for field operations.
6. When a defect is detected, it can emit a bright spark, accompanied by sound and light alarms.
Principle
When the DJ-9 spark detector is working, a pulsed high voltage is applied to the anti-corrosion coating on the metal substrate through Probe. When the coating is intact and nondestructive, its insulation performance is good, and current cannot pass through. If the coating has defects such as pinholing, bubbles, cracks or crazing, the high voltage will break through the air or weak point at the defect, resulting in spark discharge. The instrument then triggers an acoustic and light alarm to indicate the location of the leakage point of the anti-corrosion layer.
Applications
Chemical, petroleum, rubber, enamel industries
Steps
1. Check the power of the instrument to ensure that the battery is fully powered.
2. According to the thickness of the anti-corrosion coating to be tested, set or select the corresponding detection voltage (0.5KV~ 30KV) through the instrument panel.
3. Reliably connect the instrument grounding wire to the metal substrate under test.
4. Turn on the instrument power switch.
5. Handheld detection Probe, so that Probe Electrode at a constant speed in the test coating surface scanning movement.
6. When scanning to coating defects, the instrument will generate sparks and sound and light alarms, and the operator needs to record or use the instrument's memory function to store the location of the leak point (maximum 99 points).
7. After the test is completed, turn off the power of the instrument, disconnect the ground wire, clean and put away the Probe.
Notice
Please read the instructions carefully before use and ensure that the operator is trained.
Before testing, it is necessary to ensure that the grounding wire of the instrument is reliably connected to the metal substrate to prevent the risk of electric shock.
• Accurately select the detection voltage according to the Coating thickness. Too high voltage may damage the intact coating, and too low voltage may lead to missed inspection.
• When testing, Probe Electrode should maintain an appropriate distance from the coating surface and move at a uniform speed.
• The instrument is a high voltage output device, please do not use it in a flammable and explosive environment.
• Do not connect or disconnect the Probe when the instrument is powered on.
• Regularly check the instrument and Probe insulation performance to ensure safety.
• When the instrument is not in use for a long time, please remove the battery and store it properly.
