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DQQDE board (Vearth card) -The DDQDE board was designed for the monitoring of the potential to ground of the 13kA circuits. -240 of these boards will be installed at different point on the LHC magnet chain, inside the DQLPU-S crates (30 boards/sector) DQLPU_S crate Half-cell in the LHC tunnel Dipole A Dipole B Dipole C Quad DQLPU_S DQQDE Design of the board -Europe card 160mm x 100mm (without front panel) -The design of this board is mostly identical to the one of others QPS electronic boards (DQQBS,DQQDC). But with only one circuit per card (two for DDQBS,..) Input stage -Voltage measurement Range: +/- 2085V -Resolution: 0.2 mV (24bits) -Board Input Impedance: 20 Mohm (Imax= 0.1 mA) -Possibility of disconnecting the “probe” (During ELQA test). Digital processing -Aduc834 microconverter -24bits A/D Sigma delta convertion with a sampling of 5-100 [Hz]. I2C bus -Communication with AMG board trough DQLPU-Ss motherboards I2C bus State of the Production of the 240 boards -The design is almost ready for launching the production. (we are waiting for the arrival on the 22/10.2010 of the high voltage relay to do one more test) -All the components were ordered and should be at CERN in the next 6 weeks. I expect that we can send the components and the pcbs for the mounting at the end of November.