From Roger@cryogenic.co.uk Thu Dec 21 14:59:57 2006 Received: from smtp001.apm-internet.net ([85.119.248.9]) by mail1.Physics.LeidenUniv.nl with Microsoft SMTPSVC(6.0.3790.1830); Thu, 21 Dec 2006 14:59:34 +0100 Received: (qmail 62469 invoked from network); 21 Dec 2006 13:59:32 -0000 Received: from unknown (HELO cryogenic.co.uk) (213.120.114.238) by smtp001.apm-internet.net with SMTP; 21 Dec 2006 13:59:31 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Content-class: urn:content-classes:message X-MimeOLE: Produced By Microsoft Exchange V6.5 Subject: RE: problem with helium probe 105 Date: Thu, 21 Dec 2006 13:59:57 -0000 Message-ID: <3FBC6B0F963CBF41AE784D72A2D88C1A16C3C0@CRYSRV01.cryogenic.local> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: problem with helium probe 105 Thread-Index: Acck9cXxtCG/DpIyStmgIXbWUkO3mQADlzXg From: "Roger Mitchell" To: "Federica Galli" Return-Path: Roger@cryogenic.co.uk X-OriginalArrivalTime: 21 Dec 2006 13:59:34.0138 (UTC) FILETIME=[3E7835A0:01C72508] Status: R X-Status: NC X-KMail-EncryptionState: X-KMail-SignatureState: X-KMail-MDN-Sent: Dear Federica, The connections are as follows: E =3D -V D =3D +V F=3D +I C=3D -I Where D & F are connected to the base of the superconducting wire=20 C is the connection in series with the heater which then connects to the top of the s/c wire=20 E is the connection directly in series with the top of the s/c wire. I regret to say the measurements do confirm the probe is damaged beyond repair. I will ask our sales department to send you a quotation for a replacement. =20 Our records show that the 2.1mm stainless tube length should be 1253mm long. Please confirm this is correct if you order a replacement. You can withdraw the probe without problem from the cryostat Best regards & Merry Christmas, Roger Mitchell -----Original Message----- From: Federica Galli [mailto:galli@physics.leidenuniv.nl]=20 Sent: 21 December 2006 11:53 To: Roger Mitchell Cc: Kelly Simon Subject: problem with helium probe 105 Dear Roger, I just phoned this morning about an issue with a helium probe: here are the details: 1. probe type:105 2. controle unit: HLG200/210 3. stainless steel cryostat project nr: J2024 4. magnet insert project nr: J2041 Fault findings:=20 1. Level indication does not make sense (empty=3D560mm, full=3D810mm, insetad of empty=3D0mm, full=3D555mm). 2. Resistance between E-C=3D5 Ohm, OK 3. Resistance between E-F=3D1 Ohm, WRONG according to manual (should be 95-105 Ohm) 4. Resistance between F-D=3DO.L. (open), WRONG according to manual = (should be 0.5-4 Ohm) The resistances have been measured at the probe connector. Could you please tell me what the resistances/connections above mean? Could you also send me a quotation for a new probe? Best regards, Federica --=20 Federica Galli=09 Leiden Institute of Physics Niels Bohrweg 2 2333 CA Leiden The Netherlands FAX: 0031-71-5275404 TEL: 0031-71-5275468 email: galli@physics.leidenuniv.nl web: http://www.xs4all.nl/~fgalli/ email: fed.galli@gmail.com