Hi Ken - How about a DC probe clamp (like the PSU guys use) and a scope? You could set a limit line and max hold...?? Not as high tech as James" solution. :)
Best Regards Charles Grasso Compliance Engineer Echostar Communications (w) 303-706-5467 (c) 303-204-2974 (t) 3032042...@vtext.com<mailto:3032042...@vtext.com> (e) charles.gra...@echostar.com<mailto:charles.gra...@echostar.com> (e2) chasgra...@gmail.com<mailto:chasgra...@gmail.com> From: Ken Javor [mailto:ken.ja...@emccompliance.com] Sent: Tuesday, May 31, 2016 7:51 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Handheld or portable voltmeter/ammeter with built-in and adjustable limit function with audible alarm Functionally, that is the solution at which I have arrived. A comparator whose output will drive a Sonalert. I still can't believe with a microprocessor in every handheld DVM and min/max and relative functions and continuity beepers as well, that one cannot find a meter where the meter will beep when a preset limit is exceeded. Ken Javor Phone: (256) 650-5261 ________________________________ From: "Pawson, James" <james.paw...@echostar.com<mailto:james.paw...@echostar.com>> Reply-To: "Pawson, James" <james.paw...@echostar.com<mailto:james.paw...@echostar.com>> Date: Tue, 31 May 2016 08:08:30 +0000 To: <EMC-PSTC@LISTSERV.IEEE.ORG<mailto:EMC-PSTC@LISTSERV.IEEE.ORG>> Conversation: [PSES] Handheld or portable voltmeter/ammeter with built-in and adjustable limit function with audible alarm Subject: Re: [PSES] Handheld or portable voltmeter/ammeter with built-in and adjustable limit function with audible alarm Hi Ken, I built a device to do this for monitoring audio outputs from our products when performing immunity tests for the EN55020 Broadcast Receiver Immunity standard, measuring 1kHz breakthrough. 6 input channels with a 1kHz active bandpass filter on each, output rectified and fed into a comparator, reference level set appropriately (half the peak audio level IIRC). Output of comparator into a series of LEDs and diode OR'd into a very loud buzzer. All wrapped up in a die cast aluminium enclosure with very robust knobs to make it proof against regular lab use. It was most amusing listening to our technician performing the test; the sound of the buzzer shortly followed by an even louder annoyed huff as he got up from his chair to go and see what the problem was :) James From: Ken Javor [mailto:ken.ja...@emccompliance.com] Sent: 30 May 2016 16:57 To: EMC-PSTC@LISTSERV.IEEE.ORG<mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: [PSES] Handheld or portable voltmeter/ammeter with built-in and adjustable limit function with audible alarm For an EMI test, I need to monitor direct current and set a limit above which I get an audible alarm. I don't want to constantly have to watch an ammeter/voltmeter while also operating the susceptibility equipment. I also don't want to have to connect a DVM to a PC; I want the limit setting function to be self-contained. Seems as if there ought to be such a device, but I can't find it. Doesn't have to be an ammeter per se; if it can measure dc millivolts, I can use a current shunt. Thank you, Ken Javor Phone: (256) 650-5261 - ---------------------------------------------------------------- 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 <emc-p...@ieee.org<mailto:emc-p...@ieee.org>> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) <http://www.ieee-pses.org/list.html><http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org<mailto:sdoug...@ieee.org>> Mike Cantwell <mcantw...@ieee.org<mailto:mcantw...@ieee.org>> For policy questions, send mail to: Jim Bacher <j.bac...@ieee.org<mailto:j.bac...@ieee.org>> David Heald <dhe...@gmail.com<mailto:dhe...@gmail.com>> - ---------------------------------------------------------------- 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 <emc-p...@ieee.org<mailto:emc-p...@ieee.org>> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) <http://www.ieee-pses.org/list.html><http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org<mailto:sdoug...@ieee.org>> Mike Cantwell <mcantw...@ieee.org<mailto:mcantw...@ieee.org>> For policy questions, send mail to: Jim Bacher <j.bac...@ieee.org<mailto:j.bac...@ieee.org>> David Heald <dhe...@gmail.com<mailto:dhe...@gmail.com>> - ---------------------------------------------------------------- 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 <emc-p...@ieee.org<mailto:emc-p...@ieee.org>> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe)<http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org<mailto:sdoug...@ieee.org>> Mike Cantwell <mcantw...@ieee.org<mailto:mcantw...@ieee.org>> For policy questions, send mail to: Jim Bacher <j.bac...@ieee.org<mailto:j.bac...@ieee.org>> David Heald <dhe...@gmail.com<mailto:dhe...@gmail.com>> - ---------------------------------------------------------------- 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 <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
