Fall 2012 ME 395 - GSI Josh Lacey

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 Pressure Accuracy

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cjrotman



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Join date : 2012-09-16

PostSubject: Pressure Accuracy   Tue Oct 23, 2012 10:13 pm

The accuracy error of the pressure readings on the spec sheet is 1% of full scale range. I was wondering what the full scale range is? I did not record this during lab. Thanks.
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GSI Overlord
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Join date : 2012-08-30

PostSubject: Re: Pressure Accuracy   Wed Oct 24, 2012 4:04 pm

This information is actually in the Hampden_channels.pdf in the resources section of CTools for lab 5.
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rholstad



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Join date : 2012-09-12

PostSubject: Re: Pressure Accuracy   Mon Oct 29, 2012 4:48 pm

There isnt however information on the accuracy of the volume flow rate. It gives the FSR in the Hampden Channels pdf but not the error anywhere.
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GSI Overlord
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PostSubject: Re: Pressure Accuracy   Mon Oct 29, 2012 5:17 pm

You need to use two different files to get the pressure uncertainty in CTools, the Hampden_channels.pdf file and the Hampden_accuracy_errors.pdf file.
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rholstad



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PostSubject: Re: Pressure Accuracy   Mon Oct 29, 2012 5:19 pm

But neither file makes any mention of the volume flow rate error. I understand pressure, I guess the question is under the wrong header but it pertained to the hampden channels error so I replied here.
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GSI Overlord
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PostSubject: Re: Pressure Accuracy   Mon Oct 29, 2012 5:51 pm

Ah yes, sorry, I just misread your earlier post.

It looks like they didn't give you accuracy error of the flowmeter, so in the absence of a model number, you'll have to assume accuracy error to be zero and use the precision and resolution error for the uncertainty.
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