I was wondering the same thing. You can get brass blocks that drop mV per lots of amps linearly. They come in different sizes and offer almost no impedance at DC or higher freq's. DVM's or O-scopes are hooked in parallel with the blocks and the small voltage drop monitored. They handle lots of power and are pretty cheap. Am I missing something (again?) Gary
From: Price, Ed [mailto:[email protected]] Sent: Tuesday, February 17, 2004 7:52 AM To: 'EMC PSTC' Subject: RE: DC Current Probes >-----Original Message----- >From: Finlayson Joseph-G3162C [mailto:[email protected]] >Sent: Tuesday, February 17, 2004 5:54 AM >To: 'EMC PSTC' >Subject: DC Current Probes > > > >Group, > > I am looking to source a DC current probe to measure >steady state as well as inrush currents for a modular chassis >up to 100 Amps DC. Joe: Do you REALLY need a current probe? Can't you do this with a resistive shunt and an oscilloscope, using either differential inputs or simply floating the scope? That said, some of the widest bandwidth current probes (like 3 dB down at 5 Hz, very flat response, 1% accuracy) are available from Pearson Electronics: http://www.pearsonelectronics.com/ . Unfortunately, I don't know of a 100 Amp DC current sensor; all the Tek or HP probes (Hall effect or magnetoresistive) that I've seen are limited to about 6 Amps or so. Ed Ed Price [email protected] WB6WSN NARTE Certified EMC Engineer & Technician Electromagnetic Compatibility Lab Cubic Defense Applications San Diego, CA USA 858-505-2780 (Voice) 858-505-1583 (Fax) Military & Avionics EMC Is Our Specialty This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
