Hello Brian, Have you looked at the calibration certificates for your existing equipment? Just because it's specified for only ±2% doesn't mean that the actual equipment doesn't read any better than that. The data from the calibration will show the actual accuracy of the readings. If it was within 1% for two subsequent calibrations, you should be able to state that the specific unit checked is within 1% and can be used to meet the agency requirements. If you need to meet a tight requirement such as 0.5%, you will likely want more frequent calibrations, or at least regular in-house verification.
Ted Eckert Compliance Engineer Microsoft Corporation [email protected] The opinions expressed are my own and do not necessarily reflect those of my employer. -----Original Message----- From: Richard Nute [mailto:[email protected]] Sent: Thursday, October 06, 2011 11:34 AM To: [email protected] Subject: Re: hi-pot tester Hi Brian: Very interesting. DMMs are commonly available to measure up to 1000 V DC with accuracies of 0.1% or better. However, DMM probes for voltages greater than 1000 V DC are typically 2% accuracy. (Oscilloscope HV probes are MUCH better!) However (again), the Fluke 80K-6 will give you 1% with a 0.25% DMM! http://www.fluke.com/fluke/usen/accessories/high-voltage-probes/80k-6.htm?PI D=55358 Best regards, Rich > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf Of Brian > Oconnell > Sent: Wednesday, October 05, 2011 1:07 PM > To: [email protected] > Subject: RE: [PSES] hi-pot tester > > > Hello Rich, > > Everyone says NIS and 4 to 6 weeks. Also looked at probes, but all > over 2% accuracy. > > Any suggestions? > > thanks, > Brian > > > > -----Original Message----- > From: Richard Nute [mailto:[email protected]] > Sent: Wednesday, October 05, 2011 12:43 PM > To: [email protected] > Cc: [email protected] > Subject: RE: [PSES] hi-pot tester > > Hi Brian: > > > > Could not find an AR model having better than 2% voltage accuracy > > spec - require at least 1.5%. > > Suggest you use an external meter with a HV probe. > > Have you considered sources such as Exphil or TekNet or Continental > Resources or Advanced Test Equipment Rentals? > > > Best regards, > Rich > > - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://product-compliance.oc.ieee.org/ Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://product-compliance.oc.ieee.org/ Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
