Re: [PSES] Screened room mains filter

Hi Ian, Indeed a 2-phase is enough. Ground goes directly to the chambers ground-bolt, close to the filter. I recommend installing an extra (redundant) separate 4mm2 or larger solid ground bonding connector to your buildings main ground, as the leakage current for official room-filters may easily

[PSES] E8358A Agilent Network Analyzer repair

Hi All Can anyone recommend a repair shop for an Agilent E8358A 9 GHz Network Analyzer? In Europe or the US. Apparently it is outside their supported equipment at this stage. It has an intermittent fault. Many thanks in advance. Best Regards John John McAuley Compliance Engineering

Re: [PSES] Screened room mains filter

All, Another question I have is when a waveguide is added to a chamber wall, doesn't that bond the "outside" surface to the "inside" surface of the chamber, and therefore tie these "grounds" metal surfaces together? I've never installed one. Do they use a rubber gasket to keep the two

Re: [PSES] Screened room mains filter

Where do you connect the ground wire of the internal screen? If the two screens are not connected closely together, voltages exist between them. The reason the external connection should not penetrate the wall is so that VHF (and above) signals are confined to the outer surface by skin effect. I

Re: [PSES] Screened room mains filter

Agree with all of Gert's message except the one that contradicts mine: the internal green wire connection should not be the same as the external, and the external connection should not penetrate the chamber wall. Either of these practices will degrade chamber shielding effectiveness, and neither

Re: [PSES] E8358A Agilent Network Analyzer repair

Mr. McAuley, Has been my experience that the better test equipment rental companies and calibration labs have the more competent repair shops. Would not recommend shipping your instrument across the pond. Brian -Original Message- From: John McAuley [mailto:john.mcau...@cei.ie] Sent:

Re: [PSES] Screened room mains filter

Not sure I understand the concern. The dc/50/60/400 Hz impedance is sub-milliohm, and likewise for power line harmonic leakage currents. Ditto if a fault occurs. Ken Javor Phone: (256) 650-5261 > From: John Woodgate > Reply-To: John Woodgate >

Re: [PSES] Screened room mains filter

In a typical construction of particle board sandwiched between thin gauge steel facers, these are tied together at each edge where the clamping mechanism fit and hold the various pieces together. The idea is not a double-isolated room, like the old Lindgren double-electrically isolated screen

Re: [PSES] Screened room mains filter

Another typical construction style is the pan-type room, consisting of a single sheet of steel. Edges are bent at 90 degrees (two 90 degree bends actually, to give rigidity, first bend ~5 mm from edge, second bend ~15 mm from first bend), gasketing material is placed between the (unpainted)

[PSES] Standards list change from 2004/108/EC to 2014/30/EC

Hello all Found that Immunity standard 55014-2 was listed in the OJ in 2015 under the old EMC Directive but I am not finding it listed under 2014/30/EC. Anyone have any idea as to why this was just listed for the old but not new version of the same directive? Thanks in advance -- John Merrill

Re: [PSES] Standards list change from 2004/108/EC to 2014/30/EC

John There are a number of errors in the latest list – the Commission is aware of this – a new list will be published shortly (no date though) http://ec.europa.eu/growth/single-market/european-standards/harmonised-standards/electromagnetic-compatibility/index_en.htm is actually listing the OJ

Re: [PSES] Screened room mains filter

I agree with both Ken and John, the external ground wire should never pass thorugh the wall, and should be connected to the outside of the wall. Same for internal ground. From the point of ground integrity and single fault protection a single protruding bolt well bonded (welded or soldered in my