36:
137:- The three beams on the balance are used to set the level of precision, with each beam working at different increments (generally 1-10 grams, 10 grams and 100 grams). When using the triple beam balance, it is recommended to start with the lowest level of precision (e.g. 100 gram increments) and then work your way down. For example, if your object weighs 327 grams the 100 gram pointer will drop below the fixed mark on the 4th notch (400g), so you will then need to move this back to the third notch (300g). This process will then need to be repeated for the 10 gram increments (20g) and then single figure units (7g).
20:
44:
28:
118:
differences in the size of the beams indicates the difference in weights and the reading scales that each beam carries. The reading scale can be enumerated such that the middle beam reads in 100 gram increments, the far beam can read from 0 to 10 grams, and the front beam can read in 10 gram increments. The parts of a triple beam balance are identified as following:
159:
Before using a triple beam balance, the scale pointer should be at zero. The zero adjustment knob can be used to adjust the scale pointer. Place the objects on the pan and adjust the riders until the scale pointer is at zero again, and then sum the weights marked (e.g. the 4th notch of 100 gram beam
83:
from forming air currents inside the enclosure from causing an error in reading. Single pan mechanical substitution balance is a method of maintaining consistent response throughout the useful capacity of the balance. This is achieved by maintaining a constant load on the balance beam and thus the
117:
is an instrument used to measure mass very precisely. The device has reading error of +/- 0.05 gram. The name refers to the three beams including the middle beam which is the largest size, the front beam which is generally a medium size, and the far beam which is generally the smallest size. The
87:
Electronic analytical scales measure the force needed to counter the mass being measured rather than using actual masses. As such they must have calibration adjustments made to compensate for gravitational differences from changing locations and altitudes. They use an electromagnet to generate a
91:
There are three main types of analytical balances, electronic analytical balances, single-disk analytical balances, and electro-optical analytical balances. Electronic analytical balances are one of the commonly used instruments in chemical laboratories.
75:, which has uniquely designed acrylic airfoils, allows a smooth turbulence-free airflow that prevents balance fluctuation and the measure of mass down to 1 ÎĽg without fluctuations or loss of product. Also, the sample must be at
88:
force to counter the sample being measured and output the result by measuring the power (and resulting force) needed to achieve balance. Such a measurement device is called an electromagnetic force restoration sensor.
71:
does not collect and so any air currents in the room do not affect the balance's operation. This enclosure is often called a draft shield. The use of a mechanically
347:
1576:
1555:
204:
155:- This is used to manually adjust the triple beam balance to the 'zero' mark (check to ensure that the pointer is at zero before use).
1665:
229:
1191:
131:- The base rests underneath the weighing pan and can usually be customised to fit on a workbench or set up with tripod legs.
143:- The riders are the sliding pointers placed on top of the balance beams to indicate the mass in grams on the pan and beam.
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35:
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149:- The scale pointer marks the equal point of the object's mass on the scale and mass on the beam
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808:
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8:
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fulcrum, by subtracting mass on the same side of the beam as which the sample is added.
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233:
1631:
1621:
1429:
1419:
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831:
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95:
The original mechanical analytical balance was developed in the mid-18th century by
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in the sub-milligram range. The measuring pan of an analytical balance (0.1
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resolution or better) is inside a transparent enclosure with doors so that
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125:- The area in which an object is placed in order to be weighed.
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1550:
1125:
424:
68:
60:
23:
Mettler digital analytical balance with 0.5 mg readability.
280:"An Introduction to Education Scales and Balances"
59:) is a class of balance designed to measure small
1676:
341:
1301:Nuclear magnetic resonance (NMR) instrument
302:
160:is 400g) to find the weight of the sample.
348:
334:
1666:Instruments used in medical laboratories
1147:
355:
42:
34:
26:
18:
1182:Inductively coupled plasma (ICP) device
1677:
1230:Transmission electron microscope (TEM)
102:
47:Mechanical analytical balance (detail)
1507:
1326:
1146:
806:
367:
329:
99:, a Scottish chemist and physicist.
39:Automated analytical balance, 1950s
13:
1225:Scanning electron microscope (SEM)
14:
1701:
321:
1270:Thermogravimetric analyzer (TGA)
1080:Nuclear magnetic resonance (NMR)
306:how to use a triple beam balance
1327:
230:"Equal Arm Analytical Balances"
73:vented balance safety enclosure
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1:
807:
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31:Mechanical analytical balance
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368:
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10:
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1508:
303:MisterHager (2011-09-14),
106:
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1443:
1425:Time-domain reflectometer
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1335:
1322:
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1238:
1215:
1192:Liquid chromatograph (LC)
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1103:
1060:
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978:
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193:A&D training material
1260:Melting-point apparatus
641:Cryogenic storage dewar
16:Type of digital balance
1197:Mass spectrometer (MS)
1187:Gas chromatograph (GC)
48:
40:
32:
24:
1572:Acid-resistant gloves
1253:differential scanning
256:"TRIPLE Beam Balance"
46:
38:
30:
22:
1690:Laboratory equipment
1685:Weighing instruments
1149:Analytical chemistry
651:Laminar flow cabinet
357:Laboratory equipment
153:Zero adjustment knob
1521:Personal protective
430:Meker–Fisher burner
260:genchem.rutgers.edu
115:Triple beam balance
109:Triple beam balance
103:Triple beam balance
79:to prevent natural
1364:Function generator
1347:Bench power supply
1286:Analytical balance
1047:Ostwald viscometer
1042:Graduated cylinder
781:Inoculation needle
284:Adam Equipment USA
53:analytical balance
49:
41:
33:
25:
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1632:Fire extinguisher
1622:Biosafety cabinet
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1430:Transistor tester
1420:Spectrum analyzer
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1010:Measuring devices
832:Soxhlet extractor
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741:Pipeclay triangle
493:Mortar and pestle
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232:. Archived from
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207:. Archived from
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77:room temperature
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1577:Eyewash station
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1523:equipment (PPE)
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1374:Pulse generator
1340:Control devices
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1240:Thermochemistry
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1022:Conical measure
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1602:Safety goggles
1599:
1597:Safety glasses
1594:
1592:Nitrile gloves
1589:
1587:Medical gloves
1584:
1579:
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1568:
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1400:Logic analyzer
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1352:Current source
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1291:Colony counter
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930:Vacuum (Dewar)
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322:External links
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236:on 13 May 2017
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107:Main article:
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1160:Compositional
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702:Balance brush
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678:Weighing dish
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675:Weighing boat
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211:on 2014-01-06
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205:"Sensors Mag"
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55:(or chemical
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21:
1627:Fire blanket
1565:Eye and hand
1551:Rubber apron
1415:Oscilloscope
1379:Potentiostat
1306:Plate reader
1285:
1202:pH indicator
1172:CHN analyzer
1167:AutoAnalyzer
960:Round-bottom
853:Boston round
716:Filter paper
671:Refrigerator
588:Retort stand
556:Clamp holder
552:Beaker clamp
518:Vortex mixer
513:Stirring rod
508:Static mixer
438:Teclu burner
310:, retrieved
305:
298:
287:. Retrieved
283:
274:
263:. Retrieved
259:
250:
238:. Retrieved
234:the original
224:
213:. Retrieved
209:the original
199:
188:
175:Microbalance
158:
152:
146:
140:
134:
128:
123:Weighing pan
122:
112:
97:Joseph Black
94:
90:
86:
56:
52:
50:
1615:Other items
1541:Face shield
1388:Measurement
1369:Galvanostat
1329:Electronics
1279:Other items
1265:Thermometer
1248:Calorimeter
1177:Colorimeter
1121:Gas syringe
1104:Other items
1032:Eye dropper
907:Watch glass
892:Evaporating
871:Cold finger
686:Other items
592:Screw clamp
584:Pinch clamp
573:Flask clamp
523:Wash bottle
478:Homogenizer
1679:Categories
1546:Respirator
1487:Test probe
1405:Multimeter
1217:Microscopy
1037:Eudiometer
1001:Separatory
970:Volumetric
935:Erlenmeyer
863:Condensers
827:Dean–Stark
776:Wire brush
736:Microscope
731:Centrifuge
706:Cork borer
661:Petri dish
636:Agar plate
623:Containers
606:Wire gauze
443:Water bath
405:Desiccator
312:2016-02-19
289:2017-12-07
265:2016-02-19
215:2013-08-10
181:References
81:convection
1637:Fume hood
1582:Glove box
1435:Voltmeter
820:Apparatus
809:Glassware
698:Autoclave
693:Aspirator
646:Incubator
580:Iron ring
503:Sonicator
473:Chemostat
415:Hot plate
1536:Lab coat
1461:Tweezers
1451:Heat gun
1207:pH meter
1116:Bell jar
996:Dropping
950:Florence
940:Fernbach
902:Syracuse
761:Scoopula
711:Crucible
420:Lab oven
164:See also
147:Pointers
1475:General
1395:Ammeter
1095:Thistle
1052:Pipette
1027:Cuvette
1017:Burette
986:BĂĽchner
979:Funnels
965:Schlenk
945:Fleaker
925:BĂĽchner
846:Bottles
766:Spatula
756:Stopper
726:Forceps
626:Storage
543:Holders
463:Shakers
434:Striker
382:Heaters
369:General
240:8 March
57:balance
1509:Safety
1111:Beaker
1090:Thiele
1075:Cragie
1070:Drying
991:Hirsch
955:Retort
917:Flasks
885:Dishes
876:Liebig
837:Kipp's
751:Splint
561:Tripod
539:Clamps
535:Stands
498:Shaker
460:Mixers
385:Dryers
141:Riders
1444:Tools
1062:Tubes
897:Petri
135:Beams
1126:Vial
1085:Test
721:File
425:Kiln
242:2008
129:Base
69:dust
61:mass
51:An
1681::
282:.
258:.
113:A
65:mg
349:e
342:t
335:v
292:.
268:.
244:.
218:.
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