Frequency measurement with ADC11/10

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Frequency measurement with ADC11/10

Post by Controlfreak » Mon May 21, 2007 12:37 am

We just bought a measurement system utilising an USB ADC11/10 to measure the actual frequency of a 2V squarewave (34...100Hz). The required update rate of the measured frequency value is 100ms => Sampling Interval 100ms.
The contents of the plw.ini file:


I run WinXP Professional (continuously updated to latest SP, patches etc.) on a laptop, with PicoLog 5.15.6.
Whenever I set the sampling interval to < 1s, PicoLog records only some flickering frequency value between .90 and 1.21Hz, but not the correct values.
I tried also PicoLog 5.16.2, with the same result.
The supplier of the system says, that they were able to run the system with the specified 100ms sample interval.
I know that other people had similar problems a while ago
Can anybody help me?
This is the data file with the 100ms sample interval. It does not work with the 100ms setting, but it works with a 1000ms setting.
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Post by ziko » Tue May 22, 2007 1:26 pm

Hi and thank you for your post.

This is a bug, we have reported to this to the software engineers, thank you for your input.

Kind regards

Technical Specialist

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