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Summary of Contents for KERN PBS-A03
- Page 1 KERN & Sohn GmbH Ziegelei 1 Phone: +49-[0]7433- 9933-0 D-72336 Balingen Fax: +49-[0]7433-9933-149 email: info@kern-sohn.com Internet: www.kern-sohn.com Operating instructions Density Determination Set KERN PBS-A03/A04 Version 1.4 07/2016 PBS-A03/A04-BA-e-1614...
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Page 2: Table Of Contents
KERN PBS-A03/A04 Version 1.4 07/2016 Operating instructions Set for density determination for precision balances KERN PBJ/PBS Contents: INTRODUCTION ..........................3 ........................3 COPE OF SUPPLY ..........................5 IMENSIONS INSTALLING THE DENSITY DETERMINATION SET ..............6 PRINCIPLE OF DENSITY DETERMINATION ................8 .............. -
Page 3: Introduction
• These operating instructions only describe the operation of the density determination set. For further information on how to operate your balance please refer to the operating instructions supplied with each balance. Scope of supply Fig. 1: Installed density set KERN PBS-A04 PBS-A03/A04-BA-e-1614... - Page 4 1. Weighing tray holder 2. Combination weighing tray 3. Container table 4. Container 5. Weighing tray carrier, 4 items 6. Glass sinker PBS-A03/A04-BA-e-1614...
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Page 5: Dimensions
Dimensions PBS-A03/A04-BA-e-1614... -
Page 6: Installing The Density Determination Set
• For reasons of adjustment, take away the density set and place the standard weighing plate. • The following pictures show the density set KERN PBS-A03 at a balance with big weighing plate. The density set KERN PBS-A04 must be installed at the same way. - Page 7 5. Place the container table in a way that it does not touch the balance tray holder. 6. Put the containers in the center of the container table 7. Hook up the combination balance tray according to illustration; ensure that it does not touch the container. PBS-A03/A04-BA-e-1614...
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Page 8: 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 PBS/PBJ balances provides fast and safe determination of solids and fluids. Our set uses the "Principle of Archimedes"... -
Page 9: Influencing Magnitudes And Error Sources
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 PBS-A03/A04-BA-e-1614... -
Page 10: Density Determination Of Solids
Bring liquid and instruments to the right temperature until you achieve a constant temperature. Observe the warm-up time of the balance. Access mode for the density determination of solids. Switch on balance MENU In weighing mode press repeatedly until „U“ flashes. PBS-A03/A04-BA-e-1614... - Page 11 ( ) is unhidden or hidden. ( ) on: Hold display mode (the displayed density value will be kept on display). ( ) off: Continuous display mode (the displayed density value will be continuously updated according to the weight change in the auxiliary fluid). PBS-A03/A04-BA-e-1614...
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Page 12: Input „Density Auxiliary Fluid
UNIT Press to set the numeric value „1“. PRINT PRINT To set the decimal place , take the last place using , when this place dot is flashing, press anew. The symbol pops up. PBS-A03/A04-BA-e-1614... - Page 13 TARE / Confirm input by Observe that the stability mark is displayed, if not, the entry has not been accepted. ON/OFF Press repeatedly or keep pressed for 3 sec until the gram display will appear. PBS-A03/A04-BA-e-1614...
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Page 14: Access Mode For The Density Determination Of Solids
2. Place sample in the upper sample dish. 3. The weight of the „sample in air“ is displayed. When an optional printer is PRINT connected, the displayed value can be edited using MENU Wait for stability display (), then press PBS-A03/A04-BA-e-1614... - Page 15 MENU 8. Wait for stability display (), then press The scale determines the density of the sample and then displays the result. When „Hold display mode“ is enabled, the symbol [ ] will be unhidden. PBS-A03/A04-BA-e-1614...
- Page 16 For the new measurement start at step 2. UNIT Using the balance returns into the weighing mode. To avoid damage by corrosion, don't leave the immersion basket set immersed in liquid for a longer time. PBS-A03/A04-BA-e-1614...
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Page 17: Determining Density Of Liquids
Prepare balance as described in chapter 2 "Installation of density determination set". Dest. Fill water into the container. Filling height should be approx. ¾ of the capacity. Heat sample liquid until temperature is constant. Keep the sinker ready PBS-A03/A04-BA-e-1614... - Page 18 V = volume of sinker A = weight of the sinker in air = 99.998 g B = weight of the sinker in water = 87.607 g ρ = density of water (see chap. 7) at 20°C = 0.9982 g/cm³ PBS-A03/A04-BA-e-1614...
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Page 19: Density Determination At Known Volume Of The Sinker
Control the temperature of the liquid, instruments and the displacement body until the temperature is constant. Observe the warm-up time of the balance. Mode to call up density determination of liquids Switch on balance MENU In weighing mode press repeatedly until „U“ flashes. PBS-A03/A04-BA-e-1614... - Page 20 ( ) is unhidden or hidden. ( ) on: Hold display mode (the displayed density value will be kept on display). ( ) off: Continuous display mode (the displayed density value will be continuously updated according to the weight change in the auxiliary fluid). PBS-A03/A04-BA-e-1614...
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Page 21: Enter Sinker Volume
„5“. Enter all ciphers in the same way. PRINT To set the decimal place, take the last place using , when this place dot is PRINT flashing, press anew. The symbol pops up. PBS-A03/A04-BA-e-1614... - Page 22 TARE / Acknowledge with Observe that the stability mark is displayed, if not, the entry has not been accepted. ON/OFF Press repeatedly or keep pressed for 3 sec until the gram display will appear. PBS-A03/A04-BA-e-1614...
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Page 23: Density Determination Of The Test Fluid
2. Hang the sinker on the suspension device 3. The weight of the „sinker in air“ is displayed. When an optional printer is connected, the displayed value can be edited using the PRINT button. MENU Wait for stability display (), then press PBS-A03/A04-BA-e-1614... - Page 24 . The scale determines the density of the liquid and then displays the result. When „Hold display mode“ is enabled, the symbol [ ] will be unhidden. PRINT 8. When connecting an optional printer, the result will be printed after pressing Printout example: 0.9936DL PBS-A03/A04-BA-e-1614...
- Page 25 Keep pressed the UNIT-button 3 seconds MENU To start the next measurement press , before the sinker will be removed. For the new measurement start at step 2. UNIT Using the balance returns into the weighing mode. PBS-A03/A04-BA-e-1614...
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Page 26: Preconditions For Precise Measurements
ρ enters into the common denominator and, thus, has considerable influence on the accuracy of the result. The result for the density of the sample cannot be more accurate than the least accurate of the aforementioned individual entities. PBS-A03/A04-BA-e-1614... -
Page 27: Influence Factors For Measurement Errors
4° Celsius) of the same volume. For this reason relative density does not have a unit. Density equals mass divided by volume. The application of the relative density instead of the density of a fluid in a formula produces an incorrect result. In the case of fluids only their density is physically meaningful. PBS-A03/A04-BA-e-1614... -
Page 28: 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 PBS-A03/A04-BA-e-1614... -
Page 29: User Instructions
However, check beforehand whether the sample is solvent-proof. In addition you must observe the applicable safety regulations when working with ethanol. To avoid damage by corrosion, don't leave the immersion basket set immersed in • liquid for a longer time. PBS-A03/A04-BA-e-1614...
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