Simple Data Logging?

[BPCDE]

My project seems relatively simple yet I have had problems when running it.

I am acquiring 32 channels of 60Hz voltage signals and having signalexpress convert them to rms and then scale them.

My problem is I want to log a value once an hour for 1000-2000 hrs.

I do not need to log continuous data points (since they will be relatively the same).

I have tried recording by turning on and off after a second or 0.5 seconds but I still manage to grab 3-5 values and I'm not sure if the software is still acquiring data the whole time, since I have had some errors claiming that data is not there.

Basically, what I want to do is once an hour acquire enough data to record a single rms value, per channel, to a file.

Thanks

[jschwartz]

Hi BPCDE,

If I understand what you are asking, you want to acquire a few samples (enough to establish an RMS value so somthing like 1/60 of  a second or a little more) every hour?  In LabVIEW, this would be possible, however in SignalExpress, this doesn't look possible.  What do you mean that you have tried "turning on and off after a second or 0.5 seconds?" What kind of sensor are you using? Perhaps there is a better solution to your problem.

[BPCDE]

Using start and stop conditions from recording I can log the data for a second.   However, I frequently get errors.  I saw in the forums that the logs are continuously held in memory, which I assume might cause the errors after many logs are recorded.   Due to time constraints I went back to using DasyLab which we had purchased 4 years ago.  I was able to run the test I wanted much more easily.  I will have to get back to Signal Express at a later time. Hopefully the bugs I found with subgroup deletion and incorrect time/date stamps will be solved by then. 

Thanks 

[jschwartz]

Hi BPCDE,

What kind of errors are you seeing?  What do you mean by incorrect time/date stamps?