====== A/D Converter ====== * Description: 32 channel 16 bit Analog to Digital Converter * Manafacturer: Science Engineering Associates (SEA, Inc.) * Serial Number: Board #1: - 1035 Board #2 - 1055 * Notes: Board #1 is on ID 0 and Borad #2 is on ID 2 ===== Problem ===== During the November 22, 2011 and December 21, 2011 spike many of the A/D measurements had spikes in the data, for example, the Nevzorov measurements on December 21, 2011. {{:atmos:citation:instruments:cplot1.png|}} Above shows the spikes in the data ===== Cause ====== During December 27, 2011 ground testing, moving the wires on the A/D board did cause jumps in the Attack and Side Slip pressure measurements (first two measured channels). Hence, the tips are a problem for these measurements. Look at the wires, you can see how they been partly broken where the tips connect. ===== Solution ===== Removing the tips and going directly into the A/D for all connections. ===== Problem ===== When getting the A/D back from the Sikorsky project in September 2005, the A/D board was not working. ===== Cause ===== SEAADC had a few pins busted on the high speed analog board. ===== Solution ===== Sent the borad to SEA in April of 2008. The SEAADC had a few pins busted on the high speed analog board and some other pins needed replacement. The SEAADC was calibrated. The calibration certificate is in the box with the SEAADC. ===== Problem ===== On board #1 channel #20 (starting with 0) gave incorrect voltage reading on the M200 display compared to a volt meter. On board #1 channel #4 (starting with 0) would result in spikes so the pitot static wing measurement was moved to channel #0 during MPACE (Fall 2004) which result in no spikes or problems with the measurement ===== Cause ===== Something is wrong with some of the channels on the Analog to Digital Converter. ===== Solution ===== Board #1 was sent to SEA, Inc. for calibration in June 2005. At this time the board #2 was replaced with a new Analog to Digital Converter box since the one that was being used since August 2004 was only on temporal until a new box could be built. ===== Problem ===== Several of the channels were not working on the recently calibrated board #1. These channels were the same channels that did not work on board #2. ===== Cause ===== One of the channels was incorrectly reffering to another channel's formula in the fml.300 table The rest of the channels were incorrectly labeled in the buf.300 table. ===== Solution ===== Change the formula for the one channel to the correct formula. Change the names of the channels in the buff.300 table to match the names in the acq.300 table.