PRACTICAL REPORT OF SCIENCE EDUCATION 1 MEASUREMENT

PRACTICAL REPORT OF SCIENCE EDUCATION 1
MEASUREMENT
Lecture: Purwanti Widhy, M.Si





Arranged by:
Tri Sulis Setyowati (09312241027)
Fetik Rahayu (09312241035)
Whihdah H.N. (09312241050)
M. Izzatul Faqih (09312241025)
Endah Dani P. (09312244034)

SCIENCE EDUCATION PROGRAM
MATHEMATICS AND SCIENCE FACULTY
YOGYAKARTA STATE UNIVERSITY
2010
I. Objective:
1. Students can learn how to slide calipers the use of term.
2. Students can apply the measurement using the slide calipers.

II. Basic Theory:
Measurement is a process or activity to determine the quantity of something that is numerical. More quantitative measurement, even as an instrument for assessing.
(http://bangfajars.wordpress.com/2009/09/03/arti-pengukuran-dalam-pendidikan/)
slide calipers is a measuring instrument which can reach one hundredth of a milimeter accuracy. Consisting of two parts, the stasionary and moving parts. The reading of measurement depends on the skill and precision as we as tool users. Most recent output has been equipped with digital display. In the analog version, generally the level of accuracy is 0,05mm for the term alone below 30 cm and 0,01 for those above 30 cm. Use slide calipers himself has follow:
1. To measure the object from outer side is flanked.
2. To measure the inside of an object that is usually in the form of holes (in pipe, others).
3. To measure the depth of cracks or holes on a body in away plugging or puncture the gauges.
In studying slide calipers then we will know nonius scale premises. Many measuring devices equipped with nonius scale as well slide calipers, these tools make measuring instrument capability greater or precise, because the distance between two neighboring lines as if the scale is smaller sometimes a main scale division and is 9-10 parts nonius scale. (Fembriyanti, Risma, dkk; 2010)



III. Tools and materials:
1. Markers
2. slide calipers

IV. Method:
1. Look at the position zero on the scale nonius against major scale.
2. Fine the lines nonius scale that coincides with the main scale.
3. Measure the length of markers by using the slide calipers.
4. Then also measure the diameter of the holes markers
5. Then into the hole markers.
6. And, calculate the diameter of the trunk also.
7. Repeat the experiment 3 times to obtain accuracy.

V. Data:
No. Diameter hole marker (cm) Diameter rod marker (cm) Width base marker (cm) Depth marker (cm)
1. 1,5 (eraser) 0,78 (ballpoint) 5,44 (ktm) 4,20 ballpoint closer.
2. - 1,79 (eraser) - -
3. 4,25 ( plester) 2,54 (plester) - -

VI. Discussion
At attempt of this measurement, measuring instrument which applied is slide calipers. What is measured at this attempt is object inner diameter, object external diameter, deepness of object and also wide object.
In tables of measurement of attempt is done three of times;rill for every object however by the slide calipers there's only two hence obtained by is measurement result like at data.
Slide calipers have two kinds of scale that is main scale in identity cm and scale nonius in identity mm, for reading the step slide calipers scale is originally pay attention to scale nonius which squeezing wrongly one main scale. Calculate how much finite scale to number zero hereinafter pay attention to main scale if have been read all then remain added.
First measurement is measure object inner diameter stepping him it is with turning around sinistrorse breach-block, enter maxilla into object, then shifted so that acurate jaw at object, hereinafter breach-block turned around by dextrorse. Here diameter which we measuring is diameter eraser and plaster where having measure each is 1,5 cm and 4,25 cm.



Measurement both is measure object external diameter stepping him it is with turning around sinistrorse breach-block, then opened jaw, hereinafter enter object to jaw under slide calipers, and shift jaw so that acurate jaw at object, and also last turn around dextrorse breach-block. Here diameter which we measuring is diameter ballpoint, eraser and plaster where is each have measure of 0,78 cm, 1,79 cm, 2,54 cm.





Third measurement is measure object wide, the principle equal to measuring object external diameter, in measurement which we do which we measuring is student identity where having measure of 5,44 cm.


Last measurement is measure deepness of object stepping him it is turn around sinistrorse breach-block, then opened slide calipers jaw so/till tip of tube base contact fine-form, hereinafter turn around dextrorse breach-block. Here which we measuring is deepness of cover ballpoint, where having deepness of 4,20 cm.



At practice this measurement still there are insuffiency like attempt of only is done once so that accuracy of data still not yet been reached because of slide calipers which applied there's only two.

VII. Conclusion
The function of slide calipers is to measure diameter hole, diameter rod, width, depth of object.
we can measure to apply slide calipers by paying attention to scale nonius with milimeters unit and main scale with centimeters unit and also move shear jaw.
VIII. Question
1. What is the average measurement of hole diameter, stem diameter, length and markers of 3 eksperiment above?
2. The difficulty to what was found at the time of the experiment?
3. What is the mind of the measurement?
4. What the function of nonius scale?
5. How average measurement of diameter hole, diameter rod, width base, depth on marker?
Answer:
1. Because of we are not measure the marker but ballpoint, student identity, eraser and plester which have;
a. The average measurement of hole diameter is:
 Eraser : 1,5 cm
 Plester : 4,25 cm
b. The average of measurement of stem diameter is:
 Ballpoint : 0,78 cm
 Eraser : 1,79 cm
 Plester : 2,54 cm
c. The average of measurement of length is :
 Student identity : 5,44 cm
d. The average of measurement of depth is :
 Ballpoint closer : 4,20 cm
2. The difficulty to find the coincide scale of nonius.
3. The mind of the measurement is to find the coincide scale of nonius and don't be overweening draw slide calipers at object so that don't shift the diameter.
4. To measure milimeters scale.
5. a. The average measurement of hole diameter is:
 Eraser : 1,5 cm
 Plester : 4,25 cm
b. The average of measurement of stem diameter is:
 Ballpoint : 0,78 cm
 Eraser : 1,79 cm
 Plester: 2,54 cm
c. The average of measurement of length is :
 Student identity : 5,44 cm
d. The average of measurement of depth is :
 Ballpoint closer : 4,20 cm

IX. References
http://bangfajars.wordpress.com/2009/09/03/arti-pengukuran-dalam-pendidikan/
diakses 14 november 2010
Febriyanti, Risma, dkk. 2010. Student work sheet jangka sorong. Yogyakarta: FMIPA UNY