I'm currently trying to use LabView with the ADC-24 to continuously log a series of voltages from a scanning unit. I have tried a range of conversion and sampling times however I intend to use a 60ms conversion time with a 1000ms sampling time. After a single reading for each of the 16 channels is taken I switch the digital outputs and wait a short delay (100ms although I have tried other values) before repeating the process. This is done for each possible combination of digital outputs on a continuous loop. However after approximately 4 full cycles the order of the values receives appears to shift about 4 places so that the last 4 readings become the first 4. This shift only happens once no matter how long the program runs and occurs every time, although how soon after commencing the program appears to vary.
Also if I try to increase number of readings per channel in the same sampling period the shift does not occur, however the readings erratically jump to incorrect values. This all makes processing the data very confusing so any help would be greatly appreciated.