Some Hi-pot testers have the ability to set a minimum leakage current expected which sets the alarm off if the unit being tested is switched off or otherwise disconnected.
Our UL inspector expects to see a calibration log for the Hi-pot tester. It is quite easy to build a simple fixture to test a hi pot - I'll happily email a pdf to anyone interested. Chris -----Original Message----- From: Rich Nute [mailto:[email protected]] Sent: Monday, September 25, 2000 11:08 PM To: [email protected] Cc: [email protected] Subject: Re: Verifying functionality of the equipment for Production Safety Testing Hi Paul: > My manufacturing contacts have asked for a lead on a supplier of test > equipment that I can use to be able to test the Hi pot lead for it not to > be open. If you run the Hi Pot test holding the lead in the air it will > pass . We need a way to test that the lead is not open . Connect the lead to ground and initiate the hi-pot test. ... ... ... A long time ago, I was embarrased by this situation. A UL or CSA inspector asked to verify that the hi- pot tester was indeed applying voltage to the EUT. I was about to go get a high-voltage voltmeter when the inspector simply connected the HV lead to ground and punched the start button. To my dismay, the hi-pot tester indicated pass!!! The lead was open! Well... we pulled our warehouse stock and re-tested all units. Rich ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected] ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected]
