Timebase data for high sample rate

[Rhys_CKTC]

Hi. I am running a Labview program which is sampling data from a strain gauge module in a CDAQ unit at 2kHz. The data is being logged to a TDMS file. The porblem I am having is finding a clock that is quick enough to use as a time base for this data. The clock that I am currently using is too slow and I see repeated time data for a few rows in the data file. See attached picture. So basically I need the clock data that can update at least 2000 times a second. Thankyou in advance. Rhys.

[Dennis_Knutson]

You have not provided a picture, the type of module, and other details. Posting the code would help.I doubt that there is actually repeated times. You probably aren't saving the timestamps with enough resolution.

[Rhys_CKTC]

Sorry, the picture didnt attach. Try again. The strain gauge module I am using is the NI 9235 (8 channel QTR bridge module) Thanks.

[Dennis_Knutson]

Still no picture and still no VI. Do not click on preview.

That module has a 10 kSample/sec rate so your 2k rate is easily obtainable with it's internal clock.

[Rhys_CKTC]

Seem to have a problem attaching the photograph. Here'r my code anyway.

[Rhys_CKTC]

Why won't it let me attach anything???

[Rhys_CKTC]

At

[Rhys_CKTC]

Dennis, do you know of a high speed timebase that could be implemented for this application?

[Dennis_Knutson]

As I already said, the internal timebase is more than capable so if you are reading multiple samples and specifying the internal clock, you should not have any problems. I don't know if your problem is how you are recording the data or reading it but the samples should be .5ms apart.

[Rhys_CKTC]

Dennis, Can I email you directly regarding this query, still cant attach anything on this forum. Rhys