Signal Express, NI USB-6009, Sample Rate 1 Hz

[Timsi46]

Hello,

I have a dataaquisition-device ( NI USB-6009) and want to record analog data with a sampling rate of 1 Hz. With the software it is only possible to record at a rate of 1kHz or 100 Hz.

When configure a rate of 1Hz i get an error message. Can anyone tell me what is the problem? I understand if the data-aquisition can't afford a high data rate, but not a low data rate. I configured the software in the way that data is shown only when the recording is over to save memory.

Thank you!!!

[Timsi46]

Here are some more Information for the problem. I get the follwoing Error-Message:

"Error -200284 occurred at DAQ Assistant

Possible Reason(s):

Some or all of the samples requested have not yet been acquired.

To wait for the samples to become available use a longer read timeout or read later in your program. To make the samples available sooner, increase the sample rate. If your task uses a start trigger, make sure that your start trigger is configured correctly. It is also possible that you configured the task for external timing, and no clock was supplied. If this is the case, supply an external clock.

Property: RelativeTo
Requested Value: Current Read Position

Property: Offset
Requested Value: 0"

[Steve'O]

Hi Timsi46,

are you using Measurement & Automation Explorer to configure the tasks or do you use VI's in LabVIEW?

Here is a Knowledge Base for LV:

AE KB 336EKTKD: Why Do I Get Error -200284 from my DAQmx Read VI?

http://ae.natinst.com/public.nsf/web/searchinternal/fef778ad990d5bd886256dd700770103?OpenDocument

Maybe you can post your VI if you cannot find a mistake.

Best regards,

Stefan

[Timsi46]

Hello Stefan,

I use the Software Signal Express from NAtional Instruments.

Greets Timsy

[Steve'O]

Hello Timsi,

you can configure any data-rate you want but in your case your timeout is to low.

In 'Advanced Timing' you have to set your timing to more than 10s for example 100s.

Have a look at his KB:

Why Do I Get Error -200284 from my DAQmx Read VI?

http://digital.ni.com/public.nsf/allkb/FEF778AD990D5BD886256DD700770103?OpenDocument

It doesn't matter that this KB is for the DAQmx Read VI. It's explained very good how to set the timeout.

Hope your problem has been solved.

Best regards,

Stefan