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Sat Mar 29 11:19:10 2025
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<p> <table width="98%" align="center" cellspacing="1" style="border:1px solid #486090;"> <tbody> <tr> <td cellpadding="3px" style="background-color:#486090; font-weidht:bold; color:white;">Quote:</td></tr> <tr> <td cellpadding="10px" style="background-color:#FFFFB0;"><p>The water issue has been resolved - merely incorrect temperature guages (replaced). Water is 20 C as required.</p> <p>S4 conditions at 13:12 CEST</p> <p>26.5 C / 47.2 % / Td = 14.3 C</p> <p>Based on email by TD doing the following procedure to ensure FEEs are OK after water issue</p> <p>1) disconnect the power cables of *all* FEE64s at the FEE64 PSUs<br /> 2) re-connect power cable, power-up and check/test the FEE64s<br /> *one at a time* until stable operatinmg temperature is achieved<br /> ... say 30mins?</p> <p>13:34 CEST: All be FEE1 unplugged. Powering on!</p> <p>Vertex temp read slightly warm (67 C) so powered off. Waiting for a while for water to circulate since off for a while...</p> <p>15:01 CEST: FEE1 Powered on again, Vertex reading 67 C again but it's stable and slowly going down. Watching and seeing but I think it's OK.<br /> 15:35 CEST: FEE1 has been stable around 67 C all the time. Other temps fine. Presuming this isn't a major concern. (Perhaps related to reasonably warm/humid conditions?)</p> <p>15:47 CEST: FEE2 Powered on.<br /> 16:02 CEST: Temperature stable, not exceeded 60 C.</p> <p>16:07 CEST: FEE3 Powered On.<br /> 16:17 CEST: Temperature stable, peaked at 58.44 C</p> <p>16:21 CEST: FEE4 Powered On.<br /> 16:40 CEST: Both FPGA and ASIC reading warm: 65.5 C and 58 C. Seeming to not be rising anymore.</p> <p>16:41 CEST: FEE5 Powered On.<br /> 16:53 CEST: Temperature stable, at 64 C</p> <p>16:56 CEST: FEE6 Powered On.<br /> 17:12 CEST: FPGA temp is ok but ASIC warm. Tmax ASIC = 56.88, FPGA = 55.38, PSU = 27.44</p> <p>17:15 Turning FEEs and Water off for the weekend<br /> Will test 7-12 on Monday.<br /> Might be cooler in S4.</p> <p>Cooling seems to be working but temps hotter than before.</p> <p> </p></td> </tr> </tbody> </table> </p><p> </p>
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