Difference between revisions of "Analytical Balance"

Revision as of 16:42, 26 February 2013 (view source) Enabrintain (Talk | contribs) m (→‎Analytical Balance Links: added link) ← Older edit		Revision as of 09:48, 2 May 2013 (view source) Enabrintain (Talk | contribs) m (→‎Analytical Balance Links: added Wheatstone bridge link) Newer edit →
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	== Analytical Balance Links ==		== Analytical Balance Links ==
		+	[http://en.wikipedia.org/wiki/Wheatstone_bridge Wheatstone bridge]
	Magnetic Force Restoration		Magnetic Force Restoration

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Revision as of 09:48, 2 May 2013

Creator: EnabrinTain Status: Research Born On: 11:15, 22 January 2013 (CST) Last Updated: 09:48, 02 May 2013 (CDT)

Overview

This is where I'm hanging research for building an Analytical Balance. I'd prefer to drive it with an arduino, maybe even make a shield for it.

Analytical Balance Links

Wheatstone bridge

Magnetic Force Restoration

1. Simplifying the Electronic Balance Load Cell
2. PDF
3. SCIENTECH BALANCES
4. Solenoid Coil Electromagnetic Force Calculator

Capacitive Sensors

1. Capacitive Displacement Sensors
2. Wikipedia: Capacitive sensing
3. Displacement, Location, or Position Sensors

Physics

1. Levers
2. Instrumentation amplifier
3. DESIGNER'S GUIDE TO INSTRUMENTATION AMPLIFIERS

Patents

1. Patent from 1971 (opamps!)
2. Patent from 1979
3. OpAmp tutorial
4. Amplifier Circuits
5. The OpAmp Bible

Equipment/Acquisition

• 20 Neodymium Magnets 15 x 10 x 5 mm Ring N48 (ebay: $35.78:arrived)
• 20 Neodymium rod magnet 3mm x 10mm N35 (ebay-uk: $8.25:arrived)
• Calibration weight set (100g to 10 mg) (ebay: $17:arrived)

Calibration Weight Calibration (yo dawg)

From the balance we used to verify the weights' mass: Calibration info from the balance just a few days before:

Load Test (within tolerance)

Actual Weight	Reading
0.0000 g	0.0000 g
0.0200 g	0.0200 g
0.1000 g	0.1005 g
2.0000 g	2.0006 g
50.0000 g	50.0000 g
100.0000 g	99.9998 g
150.0000 g	149.9986 g
200.0000 g	200.0003 g
210.0000 g	209.9999 g

Weights

Stated Weight	Reading
100 g	100.0045 g
50 g	50.0025 g
20 g	20.0040 g
20 g	20.0000 g
10 g	10.0000 g
5 g	5.0035 g
2 g	2.0157 g
2 g	2.0159 g
1 g	0.9985 g
0.500 g	0.5280 g
0.200 g	0.2012 g
0.200 g	0.1992 g
0.100 g	0.1186 g
0.050 g	0.0510 g
0.020 g	0.0238 g
0.020 g	0.0230 g
0.010 g	0.0089 g