High Voltage Spark Tester

Coatings on concrete can also be tested using this method.

High voltage spark tester.

Spark testers like the otc 6589 are the most reliable and easy to use since you don t have to rely on specific connector styles unlike inline models such as the ram pro diagnostic detector which may not work on some cars and may light up even if the current is too weak to create an arc at the spark plug. The wire is passed through brass ball beads which carry high voltage. Glass lined or coated pipes and vessels to detect damages of interior coating applications on surfaces. A power supply generates a high voltage dc to a probe.

300 to 400. The test voltage is suggested according to the thickness of the coating in bands as shown in table 1. For paint systems with a mean dry film thickness greater than 500 μm high voltage spark testers shall be used. A stick type holiday detector is a standalone detector with internal battery power and electrodes that attach to the end of.

The elcometer 266 revolutionises high voltage dc testing of coatings porosity detection making it safer easier and more reliable than ever before. Suggested voltage v µm mil 200 to 300. Total dry film thickness. Section 4 of this standard describes the use of high voltage spark testing and it defines the high voltage as being in excess of 800 v.

If any pin hole is detected in pvc a spark develops and electro magnetic counter counts the. A test voltage is applied to the coating by moving a brush probe across the surface and where there is either a pinhole or flaw the voltage will spark through the coating at. Re high voltage spark testers are designed for checking the quality of insulation coated wires for pin holes weak insulation exposed conductor during manufacturing at work floor. Spark testers have no audible or visual alarms to indicate a fault and rely on the operator to observe a spark jumping through a flaw in the coating material.

Unlike dc holiday detectors the ac output enables the detection of holes in coatings without requiring an earth return connection from the conductive material to the. An ac spark tester is a device which provides a high voltage ac current via an electrode for testing non conductive membranes coatings and linings over conductive materials. What is meant by the term stick type or wand holiday detector. High voltage spark testers like the positest hhd operate at voltages up to 35 000v and are typically used on coatings more than 500 µm 20 mils thick.

Due to their ac high frequency operation they can find faults in 100 coated articles without requiring an earth return connection. Can provide high and low voltage spark testing on painted. As the probe passes over a flaw a spark at. 8 to 11.