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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