Loo Kang Wee and
The Vernier Caliper model shows the principle of operation and the physical parts of a Vernier Caliper.
The Vernier calipers model has
an object (Blue) for the internal jaws to measure width of an object with slider to control width of the object and simple drag action to control position of object.
an object (Green) for external jaws to measure internal diameter of a cylinder for example with slider to control dimensions of the cylinder.
checkbox for answer to show the meaning of reading on the main scale and the vernier scale with zero error calculations if any.
drop down menu of the various common vernier scales for sense making and additional testing out by learners their ideas of how vernier works.
fine <> control buttons for learners to manipulate the model with single incremental precision
slider control for fast changes in the vernier measurement
reset button to bring simulaton back to original (default) setting.
The Vernier Caliper model was created using the Easy Java Simulations (EJS) modeling tool. It is distributed as a ready-to-run (compiled) Java archive. Double click the ejs_ntnu_VernierCaliper.jar file to run the program if Java is installed.
Please note that this resource requires
at least version 1.5 of
Vernier Caliper Source Code
The source code zip archive contains an XML representation of the Vernier Caliper model. Unzip this archive in your EJS workspace to compile and run this model using EJS. download 17kb .zip
Last Modified: June 13, 2014
%A Fu-Kwun Hwang %T Vernier Caliper Model %E Loo Kang Wee %E Wolfgang Christian, (eds) %D September 10, 2009 %U http://www.compadre.org/Repository/document/ServeFile.cfm?ID=9707&DocID=1445 %O application/java
%0 Computer Program %A Hwang, Fu-Kwun %D September 10, 2009 %T Vernier Caliper Model %E Wee, Loo Kang %E Christian, Wolfgang %8 September 10, 2009 %U http://www.compadre.org/Repository/document/ServeFile.cfm?ID=9707&DocID=1445
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The non Ejs version of the Vernier Caliper Model by Fu-Kwun Hwang that has the input field for student checking their understanding especially useful for learning the importance of precision of measurement. This is because 19.40 is precise, 19.450 is too precise and 19.4 is not precise enough for the vernier caliper of smallest unit 0.01 mm.