VI Logger 1.1.1 & NI USB-6009

[terblah]

Will the subject items work together?

[George M.]

Hi,

The 6009 uses NI-DAQmx Base which is not supported by VI Logger. VI logger supports DAQmx and Traditional DAQ, which covers almost all of our hardware. The 6009 will eventually be ported over to DAQmx, so you will be able to use it then. As to when that will happen, your guess is as good as mine. Now, you do have a datalogger option, and that is NI Data Logger. This is actually apart of the DAQmx Base driver, and will do datalogging just fine.

I hope this helps. Have a Great Day!

George

[terblah]

Thanks for the quick response. NI Datalogger would be fine for my immediate needs if I could figure out how to log two or more channels simultaneously. Any hints on how to do this?

[George M.]

Hi,

You can do this in the physical channel control. If your device is device 1, then you can select multiple channels by using "Dev1/ai0:5". You only need to type what is in between the quotation marks. This will display channels 0 through 5. You can change that to any range of channels you want. You could also type it in this way "Dev1/ai0, Dev1/ai1, Dev1/ai2" and so on.

I hope this helps. Have a Great Day!

George

[terblah]

Thanks.

Now is it possible to also establish the channel gain in order to optimize resolution? For example, my inputs (differential) are typically zero to +0.5V. Can I set the USB-6009 for +/- 1 V range using NI Datalogger?

[LYu]

Hi terblah,

The channel gain for the 6009 is configured by the input range selected. Since the Data Logger is a utility for quick data acquisition, the channel is configured to provide a gain of 1. Are you trying to measure temperature or voltage data?

Thanks,
Lesley

[terblah]

I am measuring voltage. It appears that the 14 bit resolution spans the default range of plus 20 to minus 20 volts (differential) or 0.002 V per bit. If my signal never exceeds half a volt, I'd be much better off with a range of +1 to -1V (for 14 bits) which yields 122 microvolts per bit resolution.

[LYu]

Hi terblah,

Are you using LV to work with your device? If so, DAQmx Base comes with various shipping examples in which you can adjust the channel range (i.e. gain), then build into an executable. You can find these examples in Start >> Programs >> National Instruments >> NI-DAQmx Base >> Examples.

And as a side note, the largest range for the USB-6009 in differential mode is 20V, so the code width would be 1.22mV.

Thanks,
Lesley

[terblah]

I'm not using LabView. I was hoping to use VI Logger, but this device is apparently not supported. Apparently I'm stuck.


And as a side note, the largest range for the USB-6009 in differential mode is -20V to +20 (40 V span for 14 bits), so the code width would be 1.22mV * 2 or 2.44 mV.