Removing a DC offset from Dynamic Data Type

[Frosty_JG]

I am using the DAQ Assistant to read 6 channels from a PXI-6281.  The signals of interest are approximately 90mVAC (60Hz) with up to 250mV DC Offset.  Can I programmatically subtract the offset from the acquired signals.  I tried the Express filter to no avail.  

Thanks,

Frosty JG

[Dennis_Knutson]

If you want to subtract, the subtract function works pretty well.

[djemb]

Substracting an array from Dynamic Data Type bundle after DAQ Assistant doesn't work though. https://decibel.ni.com/content/docs/DOC-4441 provides a solution. Would you have a more simple and elegant solution?

[Dennis_Knutson]

What could be simpler or more elegant than an add/subtract function. Why would you subtract an array? You simply use a constant.

[djemb]

See pic of the vi (LabVIEW 8.5.1). After some time (from 2 to 20 hours of run time) a dt error comes up.

[Dennis_Knutson]

What is the error? Why don't you have the subtract function inside the case statement. Then you would not need that silly local variable.

[djemb]

Good call about the subtract.

Error -1802 Waveforms have different dt values