1)=09Yes, you are right. It isn=92t undersampled really, but reviewing the block diagram in my improvised Write Loggin VI , I have found that the =93raw=94 signal was averaged too (300 samples) and I recorded it as is. This is an answer for your item 3} too. 2)=09Sync pulses have different amplitudes because I=92m reading digital Sync pulses with the PCI-6013 A/D converter and I have some =93hum=94 between DGND and AGND. Because I=92m only interested in Time info, I don=92t care in amplitude modulations at this time
Analyzing LOAD CELL LOGGIN graph, some averaged readings at Sync pulse windows, show =93minor=94 errors around real 73 grams trays, say + / - 10 gm, and many shows =93gross=94 errors around -30/40 gm. At first case I suppose a mix of rumble and trays hits, masking reads . Looking at second case, I saw some trays =93hanged=94 on the tracking rod and =93robbing=94 hence 30-40 gm. Now a technician, is fixing this kind of mechanical issues ( I hope), and engine isn=92t operative now. I think that in a couple of weeks, I will takes a =93real=94 raw signal and will send it to you. Before now, I tested the load cell weighting plastics tray only, but from now on, following votre conseil I will carry groups of 10 trays with known weights. When I take a static reading I get errors about +- 0,3gm from 0 to 500gm. I appreciate very much your help. Thanks a lot.
