What is pulse type holiday detector?
Pulse Holiday Detector NOVOTEST SPARK-1 is a device for detecting defects (thinning, microholes, cracks, etc.) in dielectric coatings on metals. A probe with electrode connected to one pole of the voltage source scans the surface of the tested object directly along the coating.
What is holiday test in painting?
A holiday test is an inspection method used to detect discontinuities in painted/coated surfaces using specialized tools and equipment. These tools, called holiday detectors, are portable devices that are swept across the coated surface.
How do you perform a holiday test?
It can be performed by applying low voltage or high voltage across the chosen path depending on the coating thickness. Low-voltage holiday testing is used when the coating system is less than 500 microns (20 mils) thick. This is typically done using the wet sponge method.
What is a holiday test?
Holiday testing is a non-destructive inspection method used to detect unacceptable discontinuities (voids, pinholes, fisheyes, cratering, nicks, and sometimes weaknesses) in a non-conductive coating film which are not easily visible.
What is a holiday testing?
Holiday test or a Continuity test is one of the non destructive test method applied on protective coatings to detect unacceptable discontinuities such as pinholes and voids. The test involves checking of an electric circuit to see if current flows to complete the electrical circuit.
What does a holiday detection test determine?
What is a Jeep meter?
Jeep Meter is designed specifically for testing the output voltages of both Holiday Detector (DC & Pulse DC). Jeep Meter is recommended to measure the peak voltage of high voltage holiday detectors.
How is dry film thickness measured?
Dry Film Thickness can be measured on either magnetic steel surfaces or non-magnetic metal surfaces such as stainless steel or aluminium using a digital coating thickness gauge. The principle of electromagnetic induction is used for non-magnetic coatings on magnetic substrates such as steel.
How do you do a holiday test?
What is a holiday detector used for?
Holiday detectors are employed in the non-destructive detection and location of pinholes, holidays, bare spots or thin points in protective coatings applied for corrosion protection over metal or concrete (conductive) surfaces. Holiday detectors are suitable for production pipeline coating operations, tank work and structures.
What is the output voltage of the pcwi compact pulse holiday detector?
The PCWI Compact Pulse Holiday Detector is fully adjustable, has regulated ‘pulsed’ output up to 20kV, 40kV or 60kV.
What is a pinhole detector used for?
Used for detection of coating porosity (pinholes or holidays) in dielectric (insulation type) coatings on conductive substrates, including concrete. Regulated ‘pulsed’ output is fully adjustable. Ideal for use: 1.5 mA max. 500 mA max.
What can a pulse model be used for?
All pulse models can be used for porosity and holiday testing of carbon impregnated coatings such as carbonated rubber, thick coatings such as rubber linings and on ‘plastic’/fiberglass type coatings likely to become electrostatically charged.