Caveat - I am not a calibration expert but have, at times, pretended to understand measurement uncertainty.
Do not know what is avail at your end of the forest, but all of the stuff found at Farnell, Digikey, Pasternack, L-com, etc is ok. Nothing complex or anything that would change the fabric of society - just lay it out cleanly, put in a nice metal box, do an initial verification, and sneak it in as a 'side' project the next time you take a new product to your friendly neighborhood EMC lab that has a nice source and analyzer. Complex stuff confuses NB assessment engineers and auditors, so make it look pretty and obvious. 1. keep it simple. 2. keep it modular. 3. make test stuff that suits your particular needs. 4. tests drivers should avoid lo-level bit-banging code. 5. CTL-OP 113 is a bit contradictory, but is useful as general design guide. 6. IEC Guide 115 is not complete. 7. JCGM100 is useable for those that must dance to ISO17025. Brian -----Original Message----- From: Boštjan Glavič [mailto:[email protected]] Sent: Tuesday, March 04, 2014 11:38 AM To: Brian Oconnell Cc: [email protected] Subject: Re: [PSES] Calibration of touch current measurement network and instrument SIQ is able to calibrate up to 1 MHz and issue accredited calibration certificate. But please let me know what kind of connection you have on the output. Without RF connections it will be hard to pass the calibration. We are using hioki and kikusui instruments but not really happy. Therefore our metrology department made just circuits according to IEC 60990 which do pass the calibration requirements. Output is directly attached to scope. Easy and usable. Best regards, Bostjan Boštjan Glavič Vodja laboratorija, Laboratorij za elektroniko Head of Laboratory, Laboratory of Electronic Engineering [SIQlogo60px] www.siq.si<http://www.siq.si/> SIQ Ljubljana, Trzaska c. 2, SI-1000 Ljubljana, Slovenia, VAT ID: SI23509678 t +386 (0)1 4778 265<tel:+386%20(0)1%204778%20265>, m +386 (0)41 391 283<tel:+386%20(0)41%20391%20283>, f +386 (0)1 4778 444<tel:+386%20(0)1%204778%20444> On 4. mar. 2014, at 19:57, "Brian Oconnell" <[email protected]<mailto:[email protected]>> wrote: Calibrated network analyzer and AC source. Simple 5 min test that is easily automated (about 150 lines of Python code); or about 2 hours of technician time. Should note that the NETWORK is the thing being verified - as a 'calibrated' hi-bw , hi- C/F, true RMS (thermal converter) instrument is used. But I have used (less exotic) DMMs and DSOs with acceptable results. Also, do not forget the peak current - suggest reading Mr. Perkins papers on this. Brian From: Conforti Daniele [mailto:[email protected]] Sent: Tuesday, March 04, 2014 8:46 AM To: [email protected]<mailto:[email protected]> Subject: [PSES] Calibration of touch current measurement network and instrument Hello, I am trying to find out an accredited calibration lab capable of calibrating my Leakage (Touch) Current Measurement Instrument according to the latest IECEE Operational Document, CTL-OP 113 Ed. 1.1, that is: -conformance with IEC 60990:1999 -verification of input impedance to IEC 60990:1999 (fig. 4)over the frequency range of 20 Hz to 1 MHz - calibration of both RMS and peak voltages over the frequency range 20 Hz to 1 MHz. Any suggestion or experience with the calibration of this meters? Thanks Daniele Conforti Indesit Company SpA - ---------------------------------------------------------------- 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://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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
