Hi Brian,
We used hioki in the past. The problem is how to calibrate internal circuit up to 1MHz. You can calibrate voltage up to 1MHz, however instrument shows current and this is not an easy task. Many labs have the same issue. Calibration up to 1MHz is required by IEC 60990 standard and by CB scheme. See OD-5013. Instrument shall allow rms and peak measurements. One customer was using in production Chroma. They were not very happy with it since they could not integrate it into their system. We prefer now to use normal network circuit. Our metrology department built different networks for different applications and made ISO 17025 calibration up to 1MHz. You need to use osc with the network. This is good since you can see the signal on osc. It is not so good for medical measurement since you need to do a lot of measurements manually. Therefore we built a second switch box, which makes measurement easier. Of course, such method is not useful if you are doing routine tests in production. Best regards, Boštjan Boštjan Glavič Vodja laboratorija za elektroniko / Head of Laboratory Varnost in elektromagnetika / Safety and Electromagnetics SIQ Ljubljana, Mašera-Spasićeva ulica 10, SI-1000 Ljubljana, Slovenija T: +386 1 4778 265 M: +386 41 391 283 [email protected]<mailto:[email protected]>; www.siq.si<https://www.siq.si/> [SIQ]<https://www.siq.si/> To elektronsko sporočilo je namenjeno izključno naslovniku. Pravno obvestilo.<https://www.siq.si/pravno-obvestilo-za-prejemnike-elektronske-poste/> The information transmitted by this email is intended only for the person or entity to which it is addressed. Disclaimer.<https://www.siq.si/en/legal-notice-for-e-mail-recipients/> [SIQ Facebook]<https://www.facebook.com/SIQLjubljana/> [SIQ LinkedIn] <https://www.linkedin.com/company/siq> [SIQ YouTube] <https://www.youtube.com/channel/UCURzJFvP5CDVtL_vdvWjbQA/featured> From: Brian Kunde <[email protected]> Sent: Wednesday, July 31, 2024 2:51 PM To: [email protected] Subject: [PSES] Touch/Leakage Current Test Equipment CAUTION: This email originated from outside of our organisation. Do not click links or open attachments unless you recognise the sender and know the content is safe. Greetings to all. I would like to hear your recommendations for test equipment for performing Touch/Leakage Current. If it is ok to say, we currently have an ED&D LT-952 with the 30A option and it has been great. However, we would like to get a second tester that has a LAN interface so we can automate the testing and data collection. We like the Meter Reference feature so the measurement is not only referenced to ground, but also to Line 1 or Line 2. We also like the 30 amp ability since we do test products that are rated between 20A and 30A. Even higher current rating would be nice. I would love to hear your recommendations for a good Leakage Current Tester. If it is not ok to post here, please send it directly to me. Validation and Calibration: On another related topic, how do you all Validate your Leakage Current Tester? Does anyone self calibrate their own Tester? How hard can this be? The company we use for calibration says they cannot calibrate it so they send it to another company, resulting in my tester being gone for a long period of time. So I am trying to find an acceptable solution. I also have the Human Body Model circuit as a separate box that I connect to a calibrated DMM to make measurements. This box is easy to validate just with a meter. Our NRTL Inspector says we can just measure the resistance and capacitance of the Box ourselves and do not have to send it out for calibration (that is what they do). So can I use this Box to compare the results I get with my ED&D Leakage Current Tester and call it good? Thank you very much. The Other Brian ________________________________ This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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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: https://www.mail-archive.com/[email protected]/ Website: https://ewh.ieee.org/soc/pses/ Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to unsubscribe) List rules: https://ewh.ieee.org/soc/pses/listrules.html For help, send mail to the list administrators: Mike Sherman at: [email protected] Rick Linford at: [email protected] For policy questions, send mail to: Jim Bacher: <[email protected]> _________________________________________________ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1
