From: Wolfgang Funk [Wolfgang.Funk@cern.ch] Sent: 20 February 2004 12:35 To: K.W.Bell@rl.ac.uk; A.B.Lodge@rl.ac.uk; D.J.A.Cockerill@rl.ac.uk; Lucie.Linssen@cern.ch; john.hill@rl.ac.uk; J.Greenhalgh@rl.ac.uk; R.M.Brown@rl.ac.uk; Philippe Bloch; tiziano.camporesi; guenther.dissertori@cern.ch Subject: DCS for EE Dear All, in the following you find the minutes of a meeting about DCS EE with Guenther, David and me and of an after discussion between Dave and me. The basic idea is to try to keep the same structure and number of sensors, connectors per Quadrant as for a SM in EB. PTM (Precision Temperature Monitoring): 20 T-sensors per Dee foreseen. In EB: 4 sensors on grid, 4 on front shield, 1 on cooling water fill, 1 on cooling water return per SM. T measurement of cooling water: In EE we don't have only one pipe in and one pipe out for the whole cooling system per Quadrant. Nevertheless, the only sensitive cooling pipes in EE are e.g. for EE- in duct 8B: 4 Bplate fill, 1 OES fill, 1 FES fill and in duct 12A: 4 Bplate fill, 1 OES fill, which are in both cases manifolded from one bigger pipe close to the HE read-out box. We thought that the T of the fill cooling water is almost identical at the manifold or close to it on each individual smaller pipe. The distance between the manifold and the EE patch panel is order of 1.5m without beeing close to any LV cables. Therefore the T of the water inside any of those fill pipes, just entered into the Dee, is identical to the water of the other pipes of the same manifold. This T measurement would then define the T of our precise cooling system. PROPOSAL: measure T of water on one of those pipes when just entered the Dee with the arrangement of EB for both of the above mentioned ducts per Dee. (see Guenther's talk page 21 http://wwweth.cern.ch/dcs/Documents/Talks/DCS_SM0_cmsweek_sep03.ppt ) JOHN/TONY, for the 'mechatronics', please take into account the space for the sensor inside and arround of the pipe of your choice. Note that at the cooling distribution unit for each EE on the balconies of CMS the T of the fill and return water is measured anyway. We believe that it is very difficult to install at the front environmental screen sensors with cables back to the electronics area for logistics reasons. We believe that ES will anyway measure on his side T. Therefore we propose not to measure T at the FES. Per Dee, out of the 20 PTM sensors, we just used 2 for the cooling water T measurement. Therefore we have 18 left to be placed on the backplate. To be defined where!. TSS (Temperature Safety System): 16 sensors per Dee foressen for T measurement of air arround electronics. Proposal: mount the sensors on the integration structure of electronics as for EB. Details tbd. HM (Humidity Measurement): 8 sensors per Dee foreseen. Question: do we want to measure humidity close to VPTs or close to electronics? tbd. Where do we mount them? We were as well discussing the new/old issue of a system to measure water leaks on the pipes/fittings inside SM/Dee. The question was raised, arround what pipes the "sensor cable" should be winded arround, since there are so many. Space for this sensor cable and the connector(s) is an issue. I attach an e-mail form Serguei about cable and connector types of the DCS cables and connectors. You (JOHN and TONY) can find the dimensions of the cables in the CERN catalogue and of the connectors on www.distrelec.ch and the relevant Art.No. indicated in the mail. JUSTIN, could you add this issue to the agenda of next week's UK EE meeting, please. Cheers, Wolfgang ----------------------------------------------------------------------- Dear Wolfgang, Guenther said me you were asking about cable and connector references... Please see below for what I have for the moment. Cheers, Serguei ECAL DCS external cabling: 1. TSS cable (temp.safety system) SCEM: 04.21.51.405.2 Comments: STP 9x2 CAB.SIG.FL. 9x2x0,08mm2 2. PTM cable (Precision temp.monitoring) SCEM: 04.21.51.410.5 Comments: STP 21x2 CAB.SIG.FL.21x2x0,08mm2 3. HM cable (Humidity monitoring) -- however, this is just a candidate. I still have no sample (ordered from the CERN stores 11.07.03 but not yet delivered...) SCEM: 04.21.70.104.6 Comments: HM cable sample CABLE LAN STP 4x2 AWG22/7CAT 6 Patch panel connectors: Burndy Quickmate rectangular material polyamide (rad.resistance -- OK) PTM: 24-pin BoÏtiers de contacts m×les 24 cts; type Burndy SMS-24P1 ; Distrelec Art.No. 112594 BoÏtiers de contacts femelles 24 cts; type Burndy SMS-24R1 ; Distrelec Art.No. 112612 TSS: 18-pin BoÏtiers de contacts m×les 18 cts; type Burndy SMS-18P1 ; Distrelec Art.No. 112592 BoÏtiers de contacts femelles 18 cts; type Burndy SMS-18R1 ; Distrelec Art.No. 112610 HM: 12-pin BoÏtiers de contacts m×les 12 cts; type Burndy SMS-12P1 ; Distrelec Art.No. 112590 BoÏtiers de contacts femelles 12 cts; type Burndy SMS-12R1 ; Distrelec Art.No. 112608 ------------------------------------- ECAL internal cabling: As we can safely use ordinary polyethylene insulated cabling inside the barrel, we may use the same cable I used for SM0 and SM1; this a 24x2 cable which was splitted in separate pairs and those single pairs are then used for individual sensor cabling... Reference is: SCEM: 04.21.52.030.9 Comments: 24x2 -- probe cables (SM0/1) CAB.SIG.BL.24x2x0,25mm2 However, it's not yet decided whether we will use different cable types for the barrel and the endcap -- and for the endcap we need rad.resistant cable... Actually we were about taking the same (rad.resistant) cable for both barrel and endcap. I have received the offer just yesterday (was requested 13.06.03 !); this is a kapton cable with kapton jacket -- this is a very preliminary since I have now to order some samples, but references are: H 2619 TH2 Kapton 2x AWG 26/19, kapton jacket, out.dia 1.8 mm -- UTP H 2619 STH2 the same but shielded, outer dia 2.2 mm -- STP It's highly probable that it will be used for the endcap, but maybe also for the barrel. ------------------------------------------------------------------ --