Testing Coating Porosity using an Elcometer Continuous DC High Voltage Holiday Detector скачать в хорошем качестве

Testing Coating Porosity using an Elcometer Continuous DC High Voltage Holiday Detector

How to set the voltage and sensitivity for testing using a continuous DC holiday detector, and how to do a holiday test. The high voltage Continuous DC method is typically used to test the porosity of non-conductive coatings up to 7.5mm (300mils) thick on conductive substrates. Elcometer has two Continuous DC detectors: the Elcometer 236, and the Elcometer 266 - and regardless of which one you are using, both gauges give you full control over the voltage and sensitivity settings. CONTENTS 0:49 - Voltage Settings - how to set the ideal voltage for a holiday test 2:10 - Sensitivity Settings - what is sensitivity and how to set it 4:07 - How to complete a high voltage holiday test using a continuous DC holiday detector Setting the correct voltage is vital, as testing with a voltage that is too low could fail to break down the gap between the probe and substrate, missing flaws. While testing with a voltage that’s too high could break down and damage the coating, causing the unit to alarm when there are no flaws, while creating a flaw in the process. The Elcometer 266 makes working out your test voltage easier than ever before, with its in-built voltage calculator. Simply choose your test standard, enter the specified coating thickness, and gauge will automatically calculate and set the correct voltage. The sensitivity is the level of current at which the alarm triggers to signify a flaw has been detected. If your holiday detector is too sensitive, it could alarm from a charge that is either naturally present or which builds up during the testing process. If it’s not sensitive enough, the unit won’t alarm at all, potentially missing flaws. So, to ensure the alarm only triggers within set parameters, when there really is a flaw, it’s important to set the correct sensitivity to ensure reliable alarms. To ensure you have the ideal voltage and sensitivity settings for your test, we advise if possible to test a known flaw in the coating to ensure your instrument detects it. If the flaw is detected, you’re ready to begin. WORKING SAFELY - While this video is intended as a guide for how to use the Elcometer 236 and Elcometer 266, you should always consult the operation instruction book before use, and always take extreme care when using high voltage equipment. This video is part of the Elcometer Pinhole and High Voltage Detector series. Visit https://www.elcometer.com/en/pinhole-... For more information on the Elcometer 236 and the Elcometer 266, please contact Elcometer at [email protected] or visit our website: http://www.elcometer.com/en/coating-i... ----- Click here to download the video script in English: https://www.elcometer.com/pub/media/P... ----- STANDARDS: Elcometer 236 ANSI/AWWA C213, AS 3894.1, ASTM C 536, ASTM C 537, ASTM D 4787, ASTM G 6, ASTM D 5162-B, ASTM G 62-B, BS1344-11, DIN 55670, EN 14430, ISO 2746, JIS K 6766, NACE RP0188, NACE RP0274, NACE RP0490, NACE SP0188, NACE SP0490 Elcometer 266 ANSI/AWWA C213, AS 3894.1, ASTM C 536, ASTM C 537, ASTM D 4787, ASTM D 5162-B, ASTM G 62-B, BS1344-11, DIN 55670, EN 14430, ISO 2746, ISO 29601, JIS K 6766, NACE RP0274, NACE RP0188, NACE RP0190, NACE RP0490, NACE SP0188, NACE SP0490