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How to Use a Triple-Beam Balance - PowerPoint PPT Presentation


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How to Use a Triple-Beam Balance. by John Erickson. Next. Balance Setup. Move all three sliders so that they read ‘zero’. Make sure that there is nothing on the pan and that it is clean. Check to see if the balance reads zero . Balance reads zero – click here.

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balance setup
Balance Setup
  • Move all three sliders so that they read ‘zero’.
  • Make sure that there is nothing on the pan and that it is clean.
  • Check to see if the balance reads zero.

Balance reads zero – click here

Balance doesn’t read zero – click here

Show the parts of a balance

Back

balance setup3
Balance Setup
  • Your balance isn’t reading zero so you need to turn the thumbscrew to adjust the balance until it reads zero

Next

Show the parts of a balance

Back

balance setup4
Balance Setup
  • Your balance is ready to measure. Place object to be weighed on the pan. Make sure that no part of the object is supported by the table.

Next

Show the parts of a balance

Back

moving sliders
Moving Sliders
  • Move the sliders, beginning with the largest. When moving a slider causes the balance to tip, move the slider back to the previous position.
  • Move the next slider until it tips the balance. Place is in the previous position.
  • Move the final slider until the balance reads zero.

Next

Show the parts of a balance

Back

reading sliders
Reading Sliders
  • Read each of the sliders and add their weights together.

The sliders indicate the mass is:

373 g

Back

Next

reading sliders7
Reading Sliders
  • When you read the last slider, notice that the smaller lines represent tenths.

Back

Next

reading sliders8
Reading Sliders
  • This measurement is past the third line following the 3 on small slider. This indicates a mass of:

373.3 g

Back

Next

reading sliders9
Reading Sliders
  • To maximize the number of digits in the measurement we estimate the last number. Since the slider is actually about halfway between 3.3 and 3.4, we record 3.35

373.35 g

Back

Next

parts of a balance
Parts of a Balance

Zero

Mark

Sliders

Pan

Thumbscrew

Back