> > Dear all, > According to Section 4.1.3 Voltage probes of ANSI C63.4, "A voltage probe > may be used for radio-noise voltage measurements when measurements are > made at a user's installation (see 5.6) or when the ac current level > exceeds the current-carrying capability of commercially available LISNs. > For such measurements, the method shown on Figure 4 may be used. Special > precautions shall be taken to establish a reference ground for the > measurements." > Accord to Section 5.6 Testing at manufacturer's location or user's > installation, "The voltage probe (see 4.1.3) shall be used for ac > powerline conducted emission measurements. (See IEEE Std 13-1988 for > additional information.) Neither a reference groundplane nor an LISN shall > be installed for user's installation testing unless one or both are to be > a permanent part of the installation." > The above sections seem to me to contradict one another regarding the > reference groundplane. > Can we interpret the above (Section 4.1.3 "Special precautions shall be > taken to establish a reference ground for the measurements.") to be > applicable only when testing in the laboratory and the ac current level > exceeds the current-carrying capability of commercially available LISNs? > Please comment. > Thank you in advance > David Shidlowsky > Technical Writer > EMC Laboratory > ITL (Product Testing) Ltd. > Kfar Bin Nun > Israel > Tel: +972-8-9797799 > Fax: +972-8-9797702 > Email: [email protected] > http://www.itl.co.il > http://www.i-spec.com > This e-mail message may contain privileged or confidential information. If > you are not the intended recipient, you may not disclose, use, > disseminate, distribute, copy or rely upon this message or attachment in > any way. If you received this e-mail message in error, please return by > forwarding the message and its attachments to the sender. > >
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