Table of Contents
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Contents:
1
INTRODUCTION ............................................................................................... 24
1.1
2
INSTALLING THE DENSITY DETERMINATION SET...................................... 27
3
PRINCIPLE OF DENSITY DETERMINATION .................................................. 29
3.1
4
DENSITY DETERMINATION OF SOLIDS........................................................ 31
4.1
4.2
4.3
5
DETERMINING DENSITY OF LIQUIDS ........................................................... 34
5.1
5.2
5.3
6
PRECONDITIONS FOR PRECISE MEASUREMENTS .................................... 38
6.1
6.2
6.2.1 Air bubbles.............................................................................................. 39
6.2.2 Solid Specimen....................................................................................... 39
6.2.3 Liquids .................................................................................................... 39
6.2.4 Surface ................................................................................................... 39
6.2.5 Glass Plummet for Measuring Fluids ...................................................... 40
6.3
6.3.1 Density / Relative Density....................................................................... 40
6.3.2 Drift of Balance Display .......................................................................... 40
7
DENSITY TABLE FOR FLUIDS ....................................................................... 41
8
SOLIDS .................................................................................................................... 42
9
USER INSTRUCTIONS..................................................................................... 43
ABT-A01-BA-defsi-0710
KERN ABT-A01
Version 1.0 2/2007
Operating Manual
Density Determination Set for Analytical Balance KERN ABT
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Summary of Contents for KERN ABT-A01
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Page 1: Table Of Contents
KERN ABT-A01 Version 1.0 2/2007 Operating Manual Density Determination Set for Analytical Balance KERN ABT Contents: INTRODUCTION ....................24 ..................25 COPE OF DELIVERY INSTALLING THE DENSITY DETERMINATION SET........27 PRINCIPLE OF DENSITY DETERMINATION ..........29 ..........30 NFLUENCING MAGNITUDES AND ERROR SOURCES DENSITY DETERMINATION OF SOLIDS............ -
Page 2: Introduction
3. Do not disassemble this set nor the balance. KERN ABT-A01 Density determination set for analytical balances of the KERN ABT series (readability d = 0.1 mg). This set is designed for the efficient determination of the density of solids by means of an analytical balance. -
Page 3: Scope Of Delivery
Scope of delivery SAMPLE DISH FILTER BOWL ABT-A01-BA-defsi-0710... - Page 4 No. Designation Platform assembly (sample dish and sifting bowl), 2 x Weighing platform with rack Beaker Platform for glass beaker Thermometer Holder for thermometer Glass plummet ABT-A01-BA-defsi-0710...
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Page 5: Installing The Density Determination Set
3. Carefully insert the weighing platform with rack onto the floor of the weighing space. 4. Place the platform for the glass beaker above it without touching the weighing platform, as shown. ABT-A01-BA-defsi-0710... - Page 6 (For details please refer to the operating instructions for the balance) Attention: The platform for the beaker must not touch the frame! • When the density set is installed, correct adjustment is not possible. To • achieve correct adjustment reinsert the weighing plate. ABT-A01-BA-defsi-0710...
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Page 7: Principle Of Density Determination
1 kg, has the volume of 1 m³. Additional frequently applied units include: The application of this density determination set in combination with the KERN ABT balance provides fast and safe determination of solids and fluids. Our set uses the "Principle of Archimedes"... -
Page 8: Influencing Magnitudes And Error Sources
= air density (0.0012 g/cm³) Influencing magnitudes and error sources Air pressure Temperature Volume deviance of the sinker (± 0.005 cm Surface tension of the liquid Air bubbles Immersion depth of the sample dish of sinker Porosity of the solid ABT-A01-BA-defsi-0710... -
Page 9: Density Determination Of Solids
Fill your measuring liquid, whose density ρ is known, into the beaker. Filling height should be approx. ¾ of the capacity. Place beaker in the centre of the platform Suspend sample dish from the centre of the frame Heat measuring liquid until temperature is constant. ABT-A01-BA-defsi-0710... -
Page 10: Activate Function
Confirm your selection by pressing the [TARE] key. The [TARE] key is also used to deactivate a unit or function if the corresponding setting with standstill display is shown in the display. Repeatedly press the [ON/OFF] key. This takes you back to the menu/weighing mode. ABT-A01-BA-defsi-0710... -
Page 11: Entering Density For Fluid
You can determine the value of the flashing digit, or shift the flashing digit by one position to the right, by pressing the [PRINT] key. Confirm your setting by pressing the [TARE] key. Repeatedly press the [ON/OFF] key until the balance is in weighing mode. ABT-A01-BA-defsi-0710... -
Page 12: Carrying Out Measurement
Heat measuring liquid until temperature is constant. Prepare glass sinker Activate function Press several times the [UNIT] key to change the display between activated units, piece counting, percentage and density determination mode. This does not require additional software. ABT-A01-BA-defsi-0710... - Page 13 Confirm your selection by pressing the [TARE] key. The [TARE] key is also used to deactivate a unit or function if the corresponding setting with standstill display is shown in the display. Repeatedly press the [ON/OFF] key. This takes you back to the menu/weighing mode. ABT-A01-BA-defsi-0710...
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Page 14: Entering Density Of Glass Plummet
You can determine the value of the flashing digit, or shift the flashing digit by one position to the right, by pressing the [PRINT] key. Confirm your setting by pressing the [TARE] key. Repeatedly press the [ON/OFF] key until the balance is in weighing mode. ABT-A01-BA-defsi-0710... -
Page 15: Carrying Out Measurement
Ensure that the glass beaker is dry and clean each time you fill it with test fluid. The same applies to the glass plummet. ABT-A01-BA-defsi-0710... -
Page 16: Preconditions For Precise Measurements
The result for the density of the specimen cannot be more accurate than the least accurate of the aforementioned individual entities. This fact applies equally to the determination of density for fluids and glass plummet adjustment. ABT-A01-BA-defsi-0710... -
Page 17: Influence Factors For Measurement Errors
The suspension bracket of the sifting bowl penetrates the surface of the fluid. This state undergoes continuous change. If the specimen or the glass plummet is relatively small, the surface tension will impair repeatability. The addition of a small amount of detergent makes the surface tension negligible and increases repeatability. ABT-A01-BA-defsi-0710... -
Page 18: Glass Plummet For Measuring Fluids
Accurate values are merely required if the density of fluids is determined by means of a glass plummet. For this purpose some of the models carry out auto-adjustment. ABT-A01-BA-defsi-0710... -
Page 19: Density Table For Fluids
0.9976 0.7867 0.7880 0.9973 0.7859 0.7870 0.9971 0.7851 0.7870 0.9968 0.7842 0.7861 0.9965 0.7833 0.7852 0.9963 0.7824 0.7842 0.9960 0.7816 0.7833 0.9957 0.7808 0.7824 0.9954 0.7800 0.7814 0.9951 0.7791 0.7805 0.9947 0.7783 0.7896 0.9944 0.7774 0.7886 0.9941 0.7766 0.7877 ABT-A01-BA-defsi-0710... -
Page 20: Uncertainty Of Measurement For Density Determination Of Solids
0.001 0.0001 0.0001 0.0001 0.0001 0.0001 0.002 0.0004 0.0003 0.0001 0.0001 0.0001 0.003 0.001 0.0004 0.0002 0.0002 0.0002 0.004 0.001 0.0006 0.0003 0.0003 0.0003 0.005 0.001 0.0008 0.0004 0.0003 0.0003 0.006 0.002 0.001 0.0004 0.0004 0.0004 0.01 0.003 0.002 0.001 0.001 0.001 ABT-A01-BA-defsi-0710... -
Page 21: User Instructions
However, check beforehand whether the sample is solvent-proof. In addition you must observe the applicable safety regulations when working with ethanol. Handle glass sinker with care • (no warranty claims in case of damage). ABT-A01-BA-defsi-0710...
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