I am using a cdaq-9174 w/9236 on SignalExpress and cannot acquire at my required frequency of 50 Hz continuously. Up till now my other modules for thermocouples and voltage are all straightforward: set to continuous, rate to 50, then sampling to 5-10 or so. Writing to ASCII gives appropriate rows of data matching 50 Hz. For this module, it always writes much more, and varying the sampling rate has a big effect on it (could be 150, 250 Hz, just depends). The acquisition occurs over a 2 day period so it is imperative to have a set rate. I just cant understand why it would be different from my other modules. Any ideas? Is there something in the timing tab?
