Comments for MeasurementBlog

Comment on Education by What is Physics

What is Physics — Sun, 11 Sep 2011 19:44:58 +0000

I found your posting to be insightful! Thank you.

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Comment on Thermocouple Tutorial by gas thermocouples

gas thermocouples — Sun, 03 Jul 2011 07:47:54 +0000

A very elaborated and complete video you showed here.It just shows how a thermocouple produce a volt per unit length that is proportional to the temperature.

Comment on A flow meter calibration rig by Sime-Sirim Technologies

Sime-Sirim Technologies — Mon, 06 Jun 2011 02:59:29 +0000

great article. It would help me alot…thanks…

Comment on Thermocouple Tutorial by Ray

Ray — Sun, 03 Apr 2011 23:39:03 +0000

Thanks, But…you’ve got the function correct, but the actual theory incorrect.

Thermocouples produce a net voltage per unit length (The Seebeck voltage) that is proportional to the temperature gradient across that length. The use of a cold reference junction is the practical artifact or result of standardizing the reference conditions for thermocouples. Since the reference calibration tables do not specify a device’s length, one must realize that the net temperature gradient per unit length must sum up, or total to the temperatures referred to that at the hottest, wherever it is along the length.

Thermocouples do not measure at a point!. The hot point may be anywhere along its length, not necessarily at the warmer junction.

Comment on Thermocouple Tutorial by gas thermocouples

gas thermocouples — Sun, 03 Apr 2011 15:01:30 +0000

Thermocouples measure the temperature difference between two points, not absolute temperature. To measure a single temperature one of the junctions—normally the cold junction—is maintained at a known reference temperature, and the other junction is at the temperature to be sensed.

Comment on A flow meter calibration rig by Alex Baliton

Alex Baliton — Sat, 19 Mar 2011 01:21:19 +0000

Do I really need to calibrated my gas flow gauge?

What are the consequences if I don’t calibrate my gas flow gauge?

If calibration is required for my gaf flow gauge and I don’t have a calibration kit, what is the alternative to ensure that my gas flow gauge os working well?

Comment on Education by David Archer

David Archer — Sat, 11 Dec 2010 18:14:08 +0000

learningmeasure.com),I provide an online training service LearningMeasure.com (http://www.learningmeasure.com), which has as its emphasis measurement, test, and metrology. Hopefully we can be a resource for you measurement training needs as well.

Comment on Lecture – 1 Classical Physics by Ray

Ray — Tue, 28 Sep 2010 20:57:33 +0000

Rather than wait for a comment about why I put such basic physics stuff on this site that is dedicated to measurements. My answer is: it’s one place to start for anyone interested in the nitty-gritty about measuring things.

My first real measurement class in college involved doing repeat measurements of the diameter of a small length of steel pipe. That was a physics class!

We used a micrometer and were a bit surprised to find that there was no one answer. In fact, after making 10 sets of measurements we were able to calculate (estimate) the average diameter and another statistic called the Standard Deviation. It went downhill from there, I must admit.

There is no such thing as a perfect measurement, only some that are a bit more precise than others. Knowing the science helps to understand the reasons for variations in results. At least it does for me.

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Comment on A flow meter calibration rig by Ollie

Ollie — Thu, 02 Sep 2010 14:43:29 +0000

Great article , thanks for posting it was very useful.

Comment on How to Sequence a Genome: Introduction by Alexandra Gibson

Alexandra Gibson — Wed, 30 Jun 2010 17:16:38 +0000

Online education is also good specially if you have very good and talented students.”"-

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Thu, 13 May 2010 18:44:58 +0000

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Comment on Measurement QA by eliweeclimeda

eliweeclimeda — Thu, 29 Apr 2010 01:31:25 +0000

measurementblog.com>.It's really well done! Respect to author.

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Fri, 23 Apr 2010 10:54:25 +0000

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Sat, 03 Apr 2010 10:34:32 +0000

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