Re: A stable and repeatable low value capacitance meter
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On Mon, 5 Sep 2022 at 09:42, Neil Smith G4DBN <neil@...> wrote:
The webpage says to contact him by email. I don¡¯t think it was any different - I don¡¯t recall a PayPal button for example.? I wish I knew why the HP/Agilent/Keysight meters need one to enter the lead length. The 1 MHz 4284A will take cables up to 4 m in length (with option 006) and the 30 MHz 4285A up to 2 m. Given one performs an open, short, and optionally load at the end of the cables, I can¡¯t understand why the cable length is important. The dielectric is important too. I have a set of HP extension cables, and made my cables for the LCR meter the same electrical length, as I used a different dielectric, with a slightly different relative permittivity. I thought the electrical length was more likely to be important than the physical length.? Dr. David Kirkby, Kirkby Microwave Ltd, drkirkby@... Telephone 01621-680100./ +44 1621 680100 Registered in England & Wales, company number 08914892. Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Chelmsford, Essex, CM3 6DT, United Kingdom |
Dr. David Kirkby, Kirkby Microwave Ltd