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Why does the Strip chart program generated by the TestPoint Wizard give an error with my KPCI-3101?

Question :

Why does the Strip chart program generated by the TestPoint Wizard give an error with my KPCI-3101?

Réponses :

Product(s) :
Software: TestPoint

Plug-In Boards: KPCI-3101, KPCI-3102, KPCI-3103, KPCI-3104, KCPI-3116, KPCI-3110

 


Question : Why does the Strip chart program generated by the TestPoint Wizard give an error with my KPCI-3101?


Answer: The Strip chart (A/D) program uses a default sampling period of 1Hz (Period (sec)=1). This will cause Error #207 "Unable to start acquisition (Invalid rate, etc?)".

The reason is that the KPCI-3101 (and other boards in this series) have a minimum sampling rate of 1.2 sample/sec. The default conditions of the program are out of spec for this family of boards.

You can still use the example, but must change the sampling period to a value compatible with the KPCI-3101. Or alternately, you can write a custom application that uses the timer instead of the A/D internal clock to pace slower acquisitions.

 


©Copyright 2003, Keithley Instruments, Inc.


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Numéro de la FAQ 71966

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