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KERN KERN YDB-03 Скачать руководство пользователя страница 112

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YDB-03-BA-e-2114

7 Preconditions for Precise Measurements

There are numerous error possibilities during density determination.
Accurate knowledge and caution are required to achieve precise results when
applying this density set in combination with the balance.

7.1 Calculation of Results

The balance displays results for density determination by giving four or five decimal
places. However, this does not mean that the results are accurate down to the last
decimal place as this would be the case for a calculated value. Therefore all weighing
results used for calculations have to be examined closely.

7.2 Influence Factors for Measurement Errors

7.2.1 Air bubbles

A small bubble with a diameter of 1 mm results in a buoyancy of 0.5 mg, while those
with 2 mm Ø already produces a buoyancy of 4 mg.
Therefore, make sure that no air bubbles adhere on the solid object or sinker that is
immersed in the liquid.
An oily surface causes air bubbles when immersing in the liquid, so



degrease the solvent-resistant solid sample



clean all parts that are immersed regularly and don't touch them with bare

fingers

Don't lay solid samples (particularly flat objects) outside of the liquid on the sample
dish, because this results in air bubbles by the joint immersion.

7.2.2 Solid body sample

A sample possessing too great a volume that is immersed in liquid will result in an
increase in liquid level inside the glass pitcher. As a result, part of the suspension
bracket of the sifting bowl will also be immersed causing buoyancy to increase.
As a consequence the weight of the specimen in the liquid will drop.
Samples that change the volume or assimilate liquid are unsuitable for measurement.

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Содержание KERN YDB-03

Страница 1: ...ingen E Mail info kern sohn com Phone 49 0 7433 9933 0 Fax 49 0 7433 9933 149 Internet www kern sohn com Operating manual Universal density determination set for KERN Analytical balances KERN YDB 03 Version 1 4 2021 03 GB YDB 03 BA e 2114 ...

Страница 2: ...id bodies d 1 g cm3 22 5 1 3 Determine density of floating solid bodies d 1 g cm3 24 5 2 SERIES KERN TACS TACJ 27 5 2 1 Parameter setting 27 5 2 2 Determine density of sinking solid bodies d 1 g cm3 33 5 2 3 Determine density of floating solid bodies d 1 g cm3 35 5 3 SERIES KERN ABT 38 5 3 1 Invoke mode for density determination of solid material 38 5 3 2 Enter density of the auxiliary liquid 39 5...

Страница 3: ... ADB ADJ SERIES 74 6 DETERMINING DENSITY OF LIQUIDS 75 6 1 DETERMINATION OF THE SINKER VOLUME 75 6 2 SERIES KERN ABS N ABJ NM ACS ACJ 76 6 2 2 Determining density of the test liquid 78 6 3 SERIES KERN TACS TACJ 81 6 3 1 Parameter setting 81 6 3 2 Determining density of the test liquid 86 6 4 SERIES KERN ABT 89 6 4 2 Enter density of the sinker 91 6 4 3 Determining density of the test liquid 92 6 5...

Страница 4: ...OR MEASUREMENT ERRORS 112 7 2 1 Air bubbles 112 7 2 2 Solid body sample 112 7 2 3 Liquids 113 7 2 4 Surface 113 7 2 5 Sinker for density determination of liquids 113 7 3 GENERAL INFORMATION 113 7 3 1 Density Relative Density 113 7 3 2 Drift of Balance Display 113 8 DENSITY TABLE FOR LIQUIDS 114 9 USER INSTRUCTIONS 115 ...

Страница 5: ...nly 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 1 1 Scope of delivery Check packaging and density determination set immediately when unpacking for possible visible damage Make sure that all parts are completely present Frame Platform ...

Страница 6: ...6 YDB 03 BA e 2114 Beaker Universal immersion basket for sinking and floating solid matter Sinker 20 g stainless steel weight Thermometer Compensation weights 3 pairs ...

Страница 7: ...YDB 03 BA e 2114 7 Adapter 5 items Allen wrench screw ...

Страница 8: ...8 YDB 03 BA e 2114 2 Dimension mm Frame ...

Страница 9: ...YDB 03 BA e 2114 9 Universal immersion basket for floating and descending solid matter Sample dish ...

Страница 10: ...10 YDB 03 BA e 2114 Platform Beaker ...

Страница 11: ...st and safe density determination of solids and fluids Our set uses the Principle of Archimedes to determine density BUOYANCY IS A FORCE IT AFFECTS A BODY THAT IS IMMERSED INTO A LIQUID THE BUOYANCY OF THE BODY EQUALS THE WEIGHT FORCE OF THE DISPLACED LIQUID THE FORCE OF BUOYANCY ACTS VERTICALLY UPWARDS Thus density is calculated according to the formulae below To determine the density of solid ma...

Страница 12: ... displaced by the volume of the body The volume V of the immersed body equals the volume of the displaced liquid G buoyancy of sinker Buoyancy of sinker Weight of the sinker in air A weight of sinker in test liquid B From this follows ρ Density of test liquid A weight of sinker in air B weight of the sinkers in test liquid V volume of sinker 3 1 Influencing magnitudes and error sources Air buoyanc...

Страница 13: ...etermination set KERN YDB 03 can be used with the following series of the KERN analytical balance KERN ABJ N ABS NM KERN ABP KERN ABT KERN ACS ACJ KERN TACS TACJ KERN ADB ADJ KERN AES C AEJ NM KERN AET KERN ALS A ALJ A KERN ALT B KERN TALJG A TALSG A ...

Страница 14: ...CS TACJ ALS A ALJ A ALT B TALJG A TALSG A ABP Adapter ABT ABS N ABJ NM ACS ACJ TACS TACJ ALS A ALJ A ALT B TALJG A TALSG A ABP Compensation weights Not required AES C AEJ CM AET ADB ADJ Adapter Compensation weights AES C AEJ CM AET 200 4NM AET 500 4 AET 100 5M AET 200 5DM ADB ADJ Not required Not required ...

Страница 15: ...114 15 4 2 Preparing the frame Before the frame is placed on the balance assemble the adapter belonging to the scale see allocation list chap 4 1 Use the Allen wrench and the screw included in the scope of delivery ...

Страница 16: ...adjustment is no longer possible after the density kit has been installed For reasons of adjustment take away the density set and place the standard weighing plate Disconnect scale from power supply Remove standard weighing plate and accessories such as screening ring and weighing plate carrier Example of illustration KERN ABP Example of illustration KERN ABS N ACS ABT ...

Страница 17: ... place compensation weights on the frame see allocation list chap 4 1 If when the balance is switched on the error message underload appears use only the compensation weights suitable for the respective balances Hang the immersion basket on the rack Make sure that it is centred in the recess Close the glass doors Connect the balance to the power supply and switch on Bring liquid and instruments to...

Страница 18: ...YDB 03 BA e 2114 Example of illustration with installed density sets KERN YDB 03 Upper sample dish of the immersion basket Frame Beaker Lower sifting bowl of immersion basket Compensation weights Platform ...

Страница 19: ... ethanol is used see density table chapter 8 Preparation Install density determination set see chap 4 3 2 5 1 Series KERN ABS N ACS 5 1 1 Invoke mode for density determination of solid material Turn on balance by pressing the ON OFF key Call up menu In weighing mode press the MENU button twice Press the navigation buttons repeatedly until APL FUNC is displayed Press the PRINT key Press the navigat...

Страница 20: ...lowed by the currently set auxiliary liquid e g water is displayed Distilled water Press the cursor keys repeatedly until the desired auxiliary fluid is displayed Select auxiliary fluid of your choice of known density Ethanol Methanol To confirm press TARE SET followed by the display used to enter temperature auxiliary fluid will appear ...

Страница 21: ...he help of the navigation keys or if selecting OTHER enter density of the auxiliary liquid of your choice Numeric input indicates that the weighing balance is in numeric input mode The first digit is flashing and can be changed Increase flashing digit Decrease flashing digit Digit selection to the right Confirm entry The weighing balance will display the auxiliary fluid s density at the entered te...

Страница 22: ...acity Make sure that it has no contact with the frame Remount the immersion basket Make sure that it does not touch the glass beaker Set balance to zero 2 Make sure that the balance is in the mode density determination solid material see chap 5 1 1 3 Put the solid material into the upper sample dish Fig 1 Weighing in air The weight of the sample in air is displayed 4 Wait until stability display a...

Страница 23: ...rectly on the sifting bowl Make sure that the sample is at least 1 cm immersed Figure 2 Weighing in auxiliary liquid 6 Press the UNIT button WAIT is displayed The weighing scale first determines then displays the solid matter s density 7 If you connect an optional printer you can print the result 8 Remove the sample To carry out further measuring press UNIT and then start with step 2 To avoid corr...

Страница 24: ... g cm3 a density determination with two different methods is possible Method 1 How to carry out see chap 5 1 2 As aid liquid is used a liquid with less density than that of the solid material e g ethanol approx 0 8 g cm3 This method should be applied when the density of the solid is just slightly different from that of the distilled water Using ethanol is not recommended when the solid material is...

Страница 25: ...t has no contact with the frame Remount the immersion basket Make sure that it does not touch the glass beaker Set balance to zero Make sure that the balance is in the mode density determination solid material see chap 5 1 1 Put the solid material into the upper sample dish Fig 3 Weighing in air The weight of the sample in air is displayed Wait until stability display appears then press UNIT SINK ...

Страница 26: ... possible place the sample using pincers or alike directly under the sifting bowl Fig 4 Weighing in auxiliary liquid The weighing scale first determines then displays the solid matter s density If you connect an optional printer you can print the result Remove the sample To carry out further measuring press UNIT and then start with step 2 To avoid corrosion don t leave the density set immersed in ...

Страница 27: ...PRINT Press the navigation buttons until SG appears Confirm by pressing TARE The display shows SET and the current setting By pressing TARE select between the settings SG and S SG mode Determination of density of solids The current setting is marked by the stabilization indicator 2 Entry of reference liquid parameters Confirm by pressing TARE The display shows SET and the currently set reference l...

Страница 28: ...THL or METHL options Confirm the selection by pressing TARE The display shows SET and an indication to enter the parameter Temperature of reference liquid Press TARE The display changes so that you can enter a numerical value Entry of numerical value The symbol shows that the balance is in the mode for entering a numerical value The first item flashes and you can change its value Increase the valu...

Страница 29: ...utton and hold it down for 3 s Selection of OTHER Press TARE The display changes and you can enter a numerical value Using navigation buttons enter the known density of the selected reference liquid Confirm by pressing TARE 3 HOLD function SG HOLD Data HOLD function can be activated both for the determination of density of solids and liquids The displayed density value often fluctuates and its rea...

Страница 30: ...uttons until SG HOLD appears Confirm by pressing TARE By pressing TARE select between the settings OFF and ON The current setting is marked by the stabilization indicator Stabilization indicator SG HOLD setting OFF OFF ON ON Go back to the menu by pressing ON OFF and enter other settings Go back to the menu by pressing ON OFF and enter other settings or Go back to the density determination mode by...

Страница 31: ...n with air resistance correction Determination of density of solids ρ Density of sample ρ Density of sample A Mass of sample in air A Mass of sample in air B Mass of sample in reference liquid B Mass of sample in reference liquid ρo Density of reference liquid ρo Density of reference liquid ρα Density of air 0 0012 g cm3 Go to the menu In the weighing mode press the MENU button twice Press the nav...

Страница 32: ...until AIR COR appears Confirm by pressing TARE By pressing TARE select between the settings OFF and ON The current setting is marked by the stabilization indicator Stabilization indicator AIR COR setting OFF OFF ON ON Go back to the menu by pressing ON OFF and enter other settings or Go back to the density determination mode by repeatedly pressing the ON OFF button ...

Страница 33: ... the capacity Make sure that it has no contact with the frame Remount the immersion basket Make sure that it does not touch the glass beaker Set balance to zero 2 Make sure that the balance is in the mode density determination solid material 3 Put the solid material into the upper sample dish Fig 1 Weighing in air The weight of the sample in air is displayed 4 Wait until stability display appears ...

Страница 34: ...rectly on the sifting bowl Make sure that the sample is at least 1 cm immersed Figure 2 Weighing in auxiliary liquid 6 Press the UNIT button WAIT is displayed The weighing scale first determines then displays the solid matter s density 7 If you connect an optional printer you can print the result 8 Remove the sample To carry out further measuring press UNIT and then start with step 2 To avoid corr...

Страница 35: ... g cm3 a density determination with two different methods is possible Method 1 How to carry out see chap 5 2 2 As aid liquid is used a liquid with less density than that of the solid material e g ethanol approx 0 8 g cm3 This method should be applied when the density of the solid is just slightly different from that of the distilled water Using ethanol is not recommended when the solid material is...

Страница 36: ... that it has no contact with the frame Remount the immersion basket Make sure that it does not touch the glass beaker Set balance to zero Make sure that the balance is in the mode density determination solid material Put the solid material into the upper sample dish Fig 3 Weighing in air The weight of the sample in air is displayed Wait until stability display appears then press UNIT SINK will be ...

Страница 37: ... possible place the sample using pincers or alike directly under the sifting bowl Fig 4 Weighing in auxiliary liquid The weighing scale first determines then displays the solid matter s density If you connect an optional printer you can print the result Remove the sample To carry out further measuring press UNIT and then start with step 2 To avoid corrosion don t leave the density set immersed in ...

Страница 38: ...ss the CAL key repeatedly until FUnC SEL is displayed Press the TARE key Press the CAL button repeatedly until Unit SEL will be displayed Press the TARE key Press CAL key repeatedly until U d mode density determination solid material is displayed Make sure that the stability display appears if not confirm with the TARE key Back to menu weighing mode press ON OFF key repeatedly ...

Страница 39: ...rently set density of the auxiliary liquid is displayed In the upper part of the display panel the symbol and the symbol appear in order to indicate numerical input status The active digit is flashing To change with the navigation keys enter density of your auxiliary liquid see chap 8 UNIT key Increase the flashing digit PRINT key Digit selection to the right TARE key Confirm entry Back to menu we...

Страница 40: ...5 1 2 The weight of the sample in air is displayed 3 Wait for stability display then press the CAL key 4 Place sample of solid material in the lower sifting bowl see fig 2 chap 5 1 2 For this remove the immersion basket out from the frame Always ensure that when re immersing into the liquid no additional bubbles adhere it is better to use pincers or alike to place the sample directly on the siftin...

Страница 41: ... g cm3 a density determination with two different methods is possible Method 1 How to carry out see chap 5 2 3 As aid liquid is used a liquid with less density than that of the solid material e g ethanol approx 0 8 g cm3 This method should be applied when the density of the solid is just slightly different from that of the distilled water Using ethanol is not recommended when the solid material is...

Страница 42: ...erial entirely under the lower sifting bowl see fig 3 chap 5 1 3 For this purpose remove the immersion basket and for re immerging keep the sample possibly free of bubbles Or if possible place the sample using pincers or alike directly under the sifting bowl The weighing balance will first determine then display the sample s density If you connect an optional printer you can print the result Remov...

Страница 43: ...ss the MODE key F1 WEIGHING will be displayed Press repeatedly until the density determination function for solid material F6 is displayed Press from here on the balance is in the mode for density determination of solid material Enter density of the auxiliary liquid Press Press the currently set auxiliary liquid is displayed ...

Страница 44: ...ATER or ETHANOL is selected read the temperature on the thermometer and enter it the active digit is flashing Confirm input with PRINT key the balance changes into the mode for density determination of solid material or When selecting OTHER enter temperature of auxiliary fluid of your choice the active digit is flashing ...

Страница 45: ...t density of the auxiliary liquid is displayed The active digit is flashing Use the navigation keys to enter the density of the auxiliary liquid of your choice Confirm input with PRINT key the balance changes into the mode for density determination of solid material ...

Страница 46: ...ample in air is displayed Wait for stability display then press Place sample of solid material in the lower sifting bowl see fig 2 chap 5 1 2 For this remove the immersion basket out from the frame Always ensure that when re immersing into the liquid no additional bubbles adhere it is better to use pincers or alike to place the sample directly on the sifting bowl Make sure that the sample is at le...

Страница 47: ...th ethanol you must observe the applicable safety regulations Method 2 Make sure that the balance is in the mode for density determination of solid material see chap 5 3 1 Set balance to zero Place sample of solid material in the upper sample dish see fig 3 chap 5 1 3 The weight of the sample in air is displayed Wait for stability display then press Place the solid material entirely under the lowe...

Страница 48: ...on the current setting is displayed Using MENU button select d SoLid Confirm by pressing the PRINT button The currently set density of the aid liquid is displayed factory setting 1 0000 g cm3 for distilled water at 20 C To change enter the density of the aid liquid using arrow keys Confirm input by pressing the PRINT button The display for weight determination of the sample in air appears Confirm ...

Страница 49: ...s at least 1 cm immersed Wait for stability display then take over the weight value sample in aid liquid using the PRINT button The density of the sample is shown When an optional printer is connected the displayed value can be edited using the PRINT button Printout example KERN YKB 01N d 2 0000 g cm3 Return to weighing mode Press the ON OFF key or use the MENU button to start a new measuring cycl...

Страница 50: ...that of the solid material e g ethanol approx 0 8 g cm3 This method should be applied when the density of the solid is just slightly different from that of the distilled water Using ethanol is not recommended when the solid material is being attacked When working with ethanol you must observe the applicable safety regulations Method 2 How to carry out see chap 5 4 1 in the weighing Sample in auxil...

Страница 51: ...ayed Use the navigation buttons to select the menu item Density Acknowledge using PRINT button the current setting is displayed Use the navigation buttons to select setting Solid body Confirm using the PRINT button the set density of the aid liquid is displayed factory setting 1 0000 g cm3 for distilled water at 20 C To change press TARE key see chap 8 Use the navigation buttons to increase reduce...

Страница 52: ...tton Lay the sample into the lower sample dish and immerse it in the aid liquid trying to avoid bubble formation Make sure that the sample is at least 1 cm immersed Wait for stability display take over the weight value using PRINT button The density of the sample is shown When an optional printer is connected the displayed value can be edited using the PRINT button Printout example KERN YKB 01N 07...

Страница 53: ...Method 1 How to carry out see chap 5 5 1 As aid liquid is used a liquid with less density than that of the solid material e g ethanol approx 0 8 g cm3 This method should be applied when the density of the solid is just slightly different from that of the distilled water Using ethanol is not recommended when the solid material is being attacked When working with ethanol you must observe the applica...

Страница 54: ...from power supply Carfully remove standard weighing plate while the instrument is on Installing the density determination set while the instrument is on see chap 4 3 2 Set balance to zero Selecting density application For instance tap the icon in the top left corner of the display window and select application density The factory configuration provides enabled special function keys as well as a sp...

Страница 55: ...ple in liquid Reference liquid Auxiliary liquid distilled water ethanol or fluid of your choice of known density Temperatur e Temperature of auxiliary liquid Density of For density determination of solids Density of auxiliary liquid for water or ethanol determined automatically from the integrated density tables and then displayed For density determination of liquids Volume of plummet 5 7 1 Invoke...

Страница 56: ... Water or Ethanol enter the auxiliary liquid at the next step 2 When selecting Other enter the known density for the auxiliary liquid at the next step Temperature When selecting Water or Ethanol as auxiliary liquid the temperature is entered during this step Tap Temperature In the numeric input window Enter the temperature for the auxiliary liquid in and confirm by ...

Страница 57: ...ll be automatically determined from the integrated density tables and displayed 2 When selecting Other tap the Density of reference liquid command button Enter the known density for the auxiliary liquid in the numeric input window and confirm by Press the function key to start density determination ...

Страница 58: ...e auxiliary liquid in the centre of the platform Filling height should be approx of the capacity Make sure that it has no contact with the frame Remount the immersion basket Make sure that it does not touch the glass beaker Set balance to zero 2 Place solids in the upper sample dish Fig 1 Weighing in air The weight of the sample in air is displayed ...

Страница 59: ...mmersion basket out from the frame Always ensure that when re immersing into the liquid no additional bubbles adhere it is better to use pincers to place the sample directly on the sifting bowl Make sure that the sample is at least 1 cm immersed Fig 2 Weighing in auxiliary liquid 5 Wait for stability display and confirm by The weighing scale first determines then displays the solid matter s densit...

Страница 60: ... cm3 a density determination with two different methods is possible Method 1 Implementation see chap 5 6 2 As aid liquid is used a liquid with less density than that of the solid material e g ethanol approx 0 8 g cm3 This method should be applied when the density of the solid is just slightly different from that of the distilled water Using ethanol is not recommended when the solid material is bei...

Страница 61: ... example default report KERN YKB 01N Density Solid Operator Admin Balance ID 132012 Date 2015 03 05 Time 11 12 30 Standard liquid Water Temperature 20 C Standard liquid density 0 99823 g cm3 Weighing 1 6 757 g Weighing 2 4 999 g Density 3 836769 g cm3 Signature ...

Страница 62: ...14 If a measurement report is printed the data record will automatically be saved to the database under Density reports To Open Print press and hold your finger on the desired data record until the context menu appears ...

Страница 63: ...ough the frame on the weighing compartment floor Place it in a way that it does not touch the frame Place compensation weights Nr 1 on the frame see allocation list chap 4 1 Close the glass doors Connect the balance to the power supply and switch on When the log in function is enabled use the navigation keys to select the respective user and enter password Bring liquid and instruments to the right...

Страница 64: ...sing navigation buttons select Solid specific gravity The selected option is indicated by a frame Press OK to confirm Press MENU button to display the configuration menu 6 Introducing auxiliary liquid parameters Using navigation buttons select Solvent and press OK to confirm ...

Страница 65: ...uid temperature in the next step 4 If you select Arbitrary enter the known auxiliary liquid density Selection of Water or Ethyl alcohol Read the temperature on the thermometer and enter it using navigation buttons Press OK to confirm The corresponding density will be determined by the balance based on the integrated density table Press R to return to the menu ...

Страница 66: ...nsity of the selected auxiliary liquid Press OK to confirm Press R to return to the menu 7 Number of decimal places Using navigation buttons select Display digits after decimal po and press OK to confirm Using navigation buttons select the number of decimal places and press OK to confirm ...

Страница 67: ...e will be displayed on the screen until it is reset using OK button 9 Data transmission Using navigation buttons select Print and press OK to confirm Apply the selected setting pressing OK Protocol template In air in water S G value Protocol template S G value only SOLID SPECIFIC GRAVITY SOLID SPECIFIC GRAVITY DATE 2018 Nov 14 TIME 10 20 24 DATE 2018 Nov 14 TIME 10 20 24 L DENS 0 99730 g cm3 DS 7 ...

Страница 68: ... calculation and press OK to confirm The consecutive steps should be performed according to the balance operating manual see chapter Statistics Press ON OFF to return to the density determination mode To switch between the Density determination mode and the Weighing mode press F ...

Страница 69: ...ould not touch the stand Attach the dipper basket It should not touch the beaker Press TARE to reset the balance 2 Ensure the balance is in the Solid specific gravity mode see chapter 5 7 2 3 Place the solid body on the upper sample pan Fig 1 Weighing in the air The sample weight in the air will be displayed 4 Wait until the stabilisation indicator is displayed then press OK to take over the weigh...

Страница 70: ...ple weight in the auxiliary liquid will be displayed 6 Wait until the stabilisation indicator is displayed then press OK to take over the weighed value The density of the solid will be determined by the balance taking into account aerodynamic displacement and then displayed 7 The result can be printed after an optional printer has been connected 8 Remove the sample To perform consecutive measureme...

Страница 71: ...cedure see Chapter 5 7 3 The auxiliary liquid is the one with density below the solid body density e g ethanol density ca 0 8 g cm3 This method should be used when the solid body density is slightly different from the distilled water density Before you use ethanol check if the solid body does not get damaged During any operations entailing ethanol follow the mandatory safety regulations ...

Страница 72: ...stand Attach the dipper basket It should not touch the beaker Reset the balance 2 Ensure the balance is in the Solid specific gravity mode see chapter 5 7 2 3 Place the solid body on the upper sample pan Fig 3 Weighing in the air The sample weight in the air will be displayed 4 Wait until the stabilisation indicator is displayed then press OK to take over the weighed value ...

Страница 73: ... weight in the auxiliary liquid will be displayed 6 Wait until the stabilisation indicator is displayed then press OK to take over the weighed value The density of the solid will be determined by the balance taking into account aerodynamic displacement and then displayed 7 The result can be printed after an optional printer has been connected 8 Remove the sample To perform consecutive measurements...

Страница 74: ...S 232C cable connect the scale to the Com port of your computer Trouble free operation is ensured only when the appropriate interface cable by KERN is used optional Prepare the scale see chapter 4 3 1 Install the density determination kit on your scale see chapter 4 3 2 Remove the immersion basket and place a beaker filled with auxiliary liquid in the plate center It should be filled to ca of its ...

Страница 75: ...ation visit KERN home page www kern sohn com 6 1 Determination of the sinker volume Prepare the balance as described in chapter 4 3 2 Installation of the density determination kit Fill in the container with distilled water It should be filled to ca 3 4th of its capacity Adjust temperature until it is stable Prepare the sinker Read the temperature on the thermometer 1 Enter the weighing mode and re...

Страница 76: ...ater density see chapter 8 at 20 C 0 9982 g cm3 V 20 0000 g 17 5085 g 2 4960 cm3 0 9982 g cm3 6 2 Series KERN ABS N ABJ NM ACS ACJ 6 2 1 Mode to call up density determination of liquids 1 Turn on balance by pressing the ON OFF key 2 Call up menu In weighing mode press the MENU button twice 3 Press the navigation buttons repeatedly until APL FUNC is displayed 4 Press PRINT ...

Страница 77: ...and the display will change to numeric data input indicates that the weighing balance is in numeric input mode The first digit is flashing and can be changed Using the cursor keys enter the drop shaft s volume See chap 6 Numeric input indicates that the weighing balance is in numeric input mode The first digit is flashing and can be changed Increase flashing digit Decrease flashing digit Digit sel...

Страница 78: ...t the balance is in the mode for density determination of liquids see chap 6 1 1 If weighing balance does not show Zero press TARE 2 Put the sinker into the upper sample dish Fig 5 Weighing in air The weight of the sinker in air will be displayed 3 Wait until stability display appears then press UNIT SINK will be shown ...

Страница 79: ...4 79 4 Put the sinker into the lower sifting bowl Fig 6 Weighing in test liquid The weighing balance will first determine then display the fluid s density 5 If you connect an optional printer you can print the result ...

Страница 80: ...11AG0002 Serial no ID 1234 Balance identification no 0 1109DL Result SIGNATURE prepared by For further measurements Clean and dry container and sinker carefully Re attach the sinker Press the UNIT key Start with step 2 To avoid corrosion don t leave the density set immersed in liquid for a long time ...

Страница 81: ...1 Parameter setting 1 Selection of application Go to the menu In the weighing mode press the MENU button twice Press the navigation buttons until APL FUNC appears Confirm by pressing PRINT Press the navigation buttons until SG appears Confirm by pressing TARE The display shows SET and the current setting ...

Страница 82: ...em flashes and you can change its value Using navigation buttons enter the volume of the plummet see ch 6 1 Entry of numerical value The symbol shows that the balance is in the mode for entering a numerical value The first item flashes and you can change its value Increase the value of the flashing digit Decrease the value of the flashing digit Select the digit on the right Confirm entered data Th...

Страница 83: ...the UNIT button Go to the menu In the weighing mode press the MENU button twice Press the navigation buttons until APL FUNC appears Confirm by pressing PRINT Press the navigation buttons until SG appears Confirm by pressing TARE The display shows SET and the current setting Press the navigation buttons until SG HOLD appears Confirm by pressing TARE By pressing TARE select between the settings OFF ...

Страница 84: ... correction for air resistance AIR COR setting OFF Calculation without air resistance correction Factory setting ON Calculation with air resistance correction Determination of density of liquids ρ Density of test liquid ρ Density of test liquid A Mass of plummet in air A Mass of plummet in air B Mass of plummet in test liquid B Mass of plummet in test liquid V Plummet density V Plummet density ρα ...

Страница 85: ...t setting Press the navigation buttons until AIR COR appears Confirm by pressing TARE By pressing TARE select between the settings OFF and ON The current setting is marked by the stabilization indicator Stabilization indicator AIR COR setting OFF OFF ON ON Go back to the menu by pressing ON OFF and enter other settings or Go back to the density determination mode by repeatedly pressing the ON OFF ...

Страница 86: ...t the balance is in the mode for density determination of liquids see chap 6 3 1 If weighing balance does not show Zero press TARE 2 Put the sinker into the upper sample dish Fig 5 Weighing in air The weight of the sinker in air will be displayed 3 Wait until stability display appears then press UNIT SINK will be shown ...

Страница 87: ...4 87 4 Put the sinker into the lower sifting bowl Fig 6 Weighing in test liquid The weighing balance will first determine then display the fluid s density 5 If you connect an optional printer you can print the result ...

Страница 88: ...19AG0002 Serial no ID 1234 Balance identification no 0 1109DL Result SIGNATURE prepared by For further measurements Clean and dry container and sinker carefully Re attach the sinker Press the UNIT key Start with step 2 To avoid corrosion don t leave the density set immersed in liquid for a long time ...

Страница 89: ...up menu In weighing mode press the CAL key repeatedly until FUnC SEL is displayed Press the TARE key Press the CAL button repeatedly until Unit SEL will be displayed Press the TARE key Press CAL key repeatedly until U d mode density determination liquid is displayed Make sure that the stability display appears if not confirm with the TARE key ...

Страница 90: ...90 YDB 03 BA e 2114 Back to menu weighing mode press ON OFF key repeatedly ...

Страница 91: ...TARE button the currently set sinker volume is displayed In the upper part of the display panel the symbol and the symbol appear in order to indicate numerical input status The active digit is flashing For changes enter sinker volume using the navigation keys UNIT key Increase the flashing digit PRINT key Digit selection to the right TARE key Confirm entry Back to menu weighing mode press ON OFF k...

Страница 92: ...2 The weight of the sinker in air will be displayed 3 Wait for stability display then press the CAL key 4 Place sinker in the lower sifting bowl see fig 6 chap 6 1 2 The weighing balance will first determine then display the fluid s density 5 If you connect an optional printer you can print the result For further measurements Clean and dry container and sinker carefully Re attach the sinker Press ...

Страница 93: ... up density determination of liquids In weighing mode press the MODE key F1 will be displayed Press repeatedly until the density determination function for liquids F7 is displayed Press from here on the balance is in the mode for density determination of liquids ...

Страница 94: ...Press Press the current set volume is displayed The first digit is flashing and can be changed Using the navigation keys enter the sinker volume see chap 6 and confirm by The balance changes into the mode for density determination of liquids ...

Страница 95: ...s Place sinker into the lower sifting bowl see fig 6 chap 6 1 2 For this remove the immersion basket out from the frame Always ensure that when re immersing into the liquid no additional bubbles adhere it is better to use pincers or alike to place the sample directly on the sifting bowl Wait for stability display then press The weighing balance will first determine then display the fluid s density...

Страница 96: ...e digit Use the TARE button to select the next digit Repeat this sequence for each digit Confirm input by pressing the PRINT button The display for weight determination of the Sinker in air appears Confirm by pressing the PRINT button If weighing balance does not show Zero press TARE Place sinker into the upper sample dish see fig 5 chap 6 1 2 Wait for stability display take over the weight value ...

Страница 97: ...on The weighing balance will first determine then display the fluid s density When an optional printer is connected the displayed value can be edited using the PRINT button Printout example KERN YKB 01N d 2 0000 g cm3 Return to weighing mode Press the ON OFF key or use the MENU button to start a new measuring cycle If at the density determination errors have appeared d is displayed To avoid corros...

Страница 98: ...ensity of the sinker is displayed factory setting 3 0000 g cm3 For any change press the TARE key Use the navigation buttons to increase reduce the digit Use the TARE button to select the next digit Repeat this sequence for each digit To delete keep pressed the TARE button Confirm entry with PRINT button the display for calculation of Weight in air is displayed Should the balance not show Zero pres...

Страница 99: ...sing PRINT button The density of the test liquid is displayed When an optional printer is connected the displayed value can be edited using the PRINT button Printout example KERN YKB 01N 07 01 14 09 35 17 d 0 9984 g cm3 If at the density determination errors have appeared d is displayed For further measurements go back to density determination mode press MENU button Back to weighing mode press ON ...

Страница 100: ...up density determination mode of liquids and enter sinker volume To select method liquid press the function key You will see the display used to enter the sinker volume Sinker volume Tap Volume of plunger Enter volume for sinker and confirm by Press the function key to start density determination ...

Страница 101: ...e 2114 101 6 8 2 Determining density of the test liquid 1 Fill test liquid into the glass beaker 2 Put the sinker into the upper sample dish Fig 1 Weighing in air The weight of the sinker in air will be displayed ...

Страница 102: ... BA e 2114 3 Wait for stability display and confirm by The weighing value for Weighing in air will be displayed under weighing process 1 4 Put the sinker into the lower sifting bowl Fig 2 Weighing in test liquid ...

Страница 103: ...esult will be printed out Printout example see chap 6 6 39 7 Finish process by Remove the sample Start more measurements at step 1 6 8 3 Log density determination Printout example default report KERN YKB 01N Density Liquid Operator Admin Balance ID 132012 Date 2015 03 05 Time 11 12 30 Plunger volume 2 493 g cm3 Weighing 1 20 001 g Weighing 2 17 000 g Density 1 203771 g cm3 Signature ...

Страница 104: ...114 If a measurement report is printed the data record will automatically be saved to the database under Density reports To Open Print press and hold your finger on the desired data record until the context menu appears ...

Страница 105: ...rough the frame on the weighing compartment floor Place it in a way that it does not touch the frame Place compensation weights Nr 1 on the frame see allocation list chap 4 1 Close the glass doors Connect the balance to the power supply and switch on When the log in function is enabled use the navigation keys to select the respective user and enter password Bring liquid and instruments to the righ...

Страница 106: ... density The selected option is indicated by a frame Press OK to confirm Press MENU button to display the configuration menu 2 Entering the sinker volume Using navigation buttons select Sinker volume and press OK to confirm Using navigation buttons enter the sinker volume see chapter 6 1 and press OK to confirm ...

Страница 107: ...ns select the number of decimal places and press OK to confirm 4 Hold function Using navigation buttons select Display hold setting and press OK to confirm Using navigation buttons select the option ON or OFF and press OK to confirm With the activated function the first displayed result value will be displayed on the screen until it is reset using OK button ...

Страница 108: ...2018 Nov 14 TIME 10 20 24 DATE 2018 Nov 14 TIME 10 20 24 AIR 20 0010 g DL 1 0183 g cm3 WATER 17 4624 g DL 1 0183 g cm3 6 Statistics Using navigation buttons select Statistical calculation and press OK to confirm The consecutive steps should be performed according to the balance operating manual see chapter Statistics Press ON OFF to return to the density determination mode To switch between the De...

Страница 109: ...Reset the balance as required 3 Place the sinker on the upper sample pan The sinker weight in the air will be displayed 4 Wait until the stabilisation indicator is displayed then press OK to take over the weighed value 5 Place the sinker on the lower strainer pan To do it remove the dipper basket from the stand When submerging in the liquid again no extra air bubbles should be created It is best t...

Страница 110: ... The liquid density will be determined by the balance taking into account aerodynamic displacement and then displayed 8 The result can be printed after an optional printer has been connected 9 Remove the sample To perform consecutive measurements press OK and start the procedure from step 1 To prevent corrosion related damage to the dipper basket do not leave it submerged in the liquid for an exte...

Страница 111: ... to the Com port of your computer Trouble free operation is ensured only when the appropriate interface cable by KERN is used optional Prepare the scale see chapter 4 3 1 Install the density determination kit on your scale see chapter 4 3 2 Remove the immersion basket and place a beaker filled with auxiliary liquid in the plate center It should be filled to ca of its volume It must not touch the s...

Страница 112: ...g while those with 2 mm Ø already produces a buoyancy of 4 mg Therefore make sure that no air bubbles adhere on the solid object or sinker that is immersed in the liquid An oily surface causes air bubbles when immersing in the liquid so degrease the solvent resistant solid sample clean all parts that are immersed regularly and don t touch them with bare fingers Don t lay solid samples particularly...

Страница 113: ...eto it should be noted that a larger sinker achieves greater accuracy Determine the buoyancy and volume of the sinker as accurately as possible For the determination of fluid density these results are applied to the common denominator as well as the numerator of the formula 7 3 General information 7 3 1 Density Relative Density Relative density follows from the weight of a specimen divided by the ...

Страница 114: ... 0 7954 17 0 9988 0 7918 0 7945 18 0 9986 0 7909 0 7935 19 0 9984 0 7901 0 7926 20 0 9982 0 7893 0 7917 21 0 9980 0 7884 0 7907 22 0 9978 0 7876 0 7898 23 0 9976 0 7867 0 7880 24 0 9973 0 7859 0 7870 25 0 9971 0 7851 0 7870 26 0 9968 0 7842 0 7861 27 0 9965 0 7833 0 7852 28 0 9963 0 7824 0 7842 29 0 9960 0 7816 0 7833 30 0 9957 0 7808 0 7824 31 0 9954 0 7800 0 7814 32 0 9951 0 7791 0 7805 33 0 994...

Страница 115: ...le dish when weighing with the help of pincers In order to reduce the surface tension of water and the friction of the liquid on the wire add three drops of a common detergent washing up liquid to the aid liquid density modification of dist water occurring due to the addition of tensides can be ignored Oval samples can be held more easily with pincers when you cut grooves into them The density of ...

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