Matlab Resolution is worse than Picolog 6 Software

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jcwalpole
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Matlab Resolution is worse than Picolog 6 Software

Post by jcwalpole »

Hi,

I'm using a Picolog 1216. When collecting data from the Picolog the voltage resolution is around 0.5mV which is limited by the different between integer adc counts. However, with the PicoLog 6 software the resolution is much higher. How is this the case and how would I get a similar precision from data collected in MatLab?

Thanks,
James

Gerry
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Re: Matlab Resolution is worse than Picolog 6 Software

Post by Gerry »

Hi James,

How are you determining that the PicoLog 6 resolution is larger? (could you give us some example data).

Regards,

Gerry
Gerry
Technical Specialist

jcwalpole
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Joined: Fri Dec 04, 2020 1:52 pm

Re: Matlab Resolution is worse than Picolog 6 Software

Post by jcwalpole »

Hi Gerry,

In the PicoLog software the data is quoted to the nearest 0.001 mV. For example in a set of data that I took the first two values were 0.914608 V and 0.914609 V. When using Matlab to collect data, the maximum ADC value for the Picolog 1216 is 4095 so the resolution of the data is set by 1x2.5/4095=0.6 mV and this is reflected in the data.

Thanks,
James

Gerry
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Re: Matlab Resolution is worse than Picolog 6 Software

Post by Gerry »

Hi James,

Could you post a Picolog data file so that we can see what is being captured.

Regards,

Gerry
Gerry
Technical Specialist

jcwalpole
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Joined: Fri Dec 04, 2020 1:52 pm

Re: Matlab Resolution is worse than Picolog 6 Software

Post by jcwalpole »

Hi Gerry,

Here is some sample data from Picolog:
Jan 12, 2021 9-40-51 AM.picolog
(22 KiB) Downloaded 3 times
and some from MATLAB
pl1000MatlabExample.xlsx
(4.72 KiB) Downloaded 1 time
Thanks,
James

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