RE: Bonding Meter
Derek: Two possibilities. I use a Keithley 580 Milliohmmeter. It is very nice and stable and reliable, and will read to 0.01 milliohm (and cost me about $1500). Of course, that needs to be done as a 4-terminal (Kelvin) measurement. There is a company (C H Sales, Telephone:(800)325-9465 or (626)796-2628 FAX:(626)796-4875, Postal address: 2176 E. Colorado Blvd., Pasadena, CA 91107), currently advertising in Nuts Volts magazine, which has HP-4328A analog milliohmmeters for sale for $200. The only problem is that the price is without any test leads. But you can remove the front panel connector and hard wire in your own Kelvin leads. These HP's will read down to 0.1 milliohm. Probe Master has gold-plated Kelvin clamp sets for about $100, new. http://www.nutsvolts.com/ http://www.probemaster.com/ Regards, Ed -Original Message- From: Derek Walton [SMTP:l...@rols1.net] Sent: Friday, September 24, 1999 8:45 AM To: IEEE EMC Discussion Group Subject: Bonding Meter Hi folks, can anyone recommend a meter for making resistance measurements as low as 1 milliohm? Thanks, Derek. :-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-) Ed Price ed.pr...@cubic.com Electromagnetic Compatibility Lab Cubic Defense Systems San Diego, CA. USA 619-505-2780 (Voice) 619-505-1502 (Fax) Military Avionics EMC Services Is Our Specialty Shake-Bake-Shock - Metrology - Reliability Analysis :-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-) - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Re: Bonding Meter
Of course Kelvin probes are the right answer, but all this means is going back to basics, and you can do this more cheaply with equipment you may already have. Since you ask about a Bonding Meter I presume your device will stand an amp or ten of current. So set up a constant current dc source through your bond, of say 1 amp, and use a DVM to measure the millivolts across the bond. Millivolts read = milliohms of resistance for a current of 1 amp. With10 amps you get ten times the sensitivity of course. This is automatically a four terminal (Kelvin) measurement and so resistance in any of the leads has no effect on the measurement. Sorry if this is too obvious - but sometimes we all forget the KISS solution! Roger Derek Walton l...@rols1.net on 24/09/99 16:44:36 Please respond to Derek Walton l...@rols1.net To: IEEE EMC Discussion Group emc-p...@majordomo.ieee.org cc:(bcc: Roger Viles/PLY/Global) Subject: Bonding Meter Hi folks, can anyone recommend a meter for making resistance measurements as low as 1 milliohm? Thanks, Derek. - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Re: Bonding Meter
That pretty much takes a four point measurement. However, if you're after only reading about the right value, or side by side comparisons of the esr of a cap, try Dick Smith's esr meter. Less than $60 in kit form from Australia. Is easy to put together and extremely functional for measuring the esr of caps (while still in the circuit) and for measuring all kinds of other low impedance stuff, like connectors. I think the model number is the K-7204, or such. - Robert - -Original Message- From: Derek Walton l...@rols1.net To: IEEE EMC Discussion Group emc-p...@majordomo.ieee.org List-Post: emc-pstc@listserv.ieee.org Date: Friday, September 24, 1999 11:35 AM Subject: Bonding Meter Hi folks, can anyone recommend a meter for making resistance measurements as low as 1 milliohm? Thanks, Derek. - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Re: Bonding Meter
Derek: It is going to take an instrument with 4-lead Kelvin probes. I would recommend that you get in touch with Keithly Instruments @ 440-248-0400. I suggest that you be seated when they quote price! Regards, Val L. Erwin EMC Consultant Summit Associates, Inc. - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Bonding Meter
Hi folks, can anyone recommend a meter for making resistance measurements as low as 1 milliohm? Thanks, Derek. - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
