It can be crucial to make certain glass-lined devices is electrically grounded. In the situation of AC spark testers this is preferable for safety causes, but for DC testers it can be crucial. The subsequent Guidance give a normal overview of how to work an AC or DC spark tester. https://www.facebook.com/permalink.php?story_fbid=pfbid02vKF4SubmNYGfuj2cK7CrvneqdgJoaHLDdhVMkjP3zq2wwYcASACpFzw3t5PPuHjFl&id=61560512640678&__cft__[0]=AZWkhQsDC6XQHYeU_Y4KxAFgpeEQJQy2_3Kl4aUJR7mb8VGOWoDgiMQ1Qjy99rZ4c9-akEajfIWoPIcZPImkSd1aHTw2Fsi00ibI8e5Y5iDjM1H8bIusG87tu9omZLMH1Pab9qaqocSSeIiA32qSEz6q2LaC8Z9D8m8IdR1Z6cMiS0Nl5PY_sqAjOruwgYcU4QFBxHh1769_CNw_uvUuriCO&__tn__=%2CO%2CP-R