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Summary of Contents for KERN EMB 200-3V
- Page 1 KERN & Sohn GmbH Ziegelei 1 Phone: +49-[0]7433- 9933-0 D-72336 Balingen Fax: +49-[0]7433-9933-149 E-Mail: info@kern-sohn.com Internet: www.kern-sohn.com Operating instructions Density Scale KERN EMB 200-3V Version 1.0 04/2012 EMB-200-3V-BA-e-1210...
- Page 2 Density Scale Contents Technical data ....................4 Appliance overview ..................5 KERN EMB 200-3V....................5 KERN EMB 200-3V with installed density kit KERN YDB-01........6 Keyboard overview ....................7 2.3.1 Numeric entry ..........................7 Basic Information (General) ................8 Proper use ......................... 8 Improper Use ......................
- Page 3 Preconditions for Precise Measurements ..........31 Calculation of Results ....................31 Influence Factors for Measurement Errors ..............31 9.2.1 Air bubbles ..........................31 9.2.2 Solid body sample ........................31 9.2.3 Liquids ............................32 9.2.4 Surface ............................. 32 9.2.5 Sinker for density determination of liquids................32 General information ....................32 9.3.1 Density / Relative Density ......................
- Page 4 1 Technical data KERN EMB 200-3V Readability (d) 0,001 g Weighing range (max) 200 g Reproducibility 0,001 g Linearity ± 0,003 g 200 g Recommended adjustment weight, not added (class) (F1) Stabilization time (typical) 2.5 sec Warm-up time Unit Operating temperature +5°C…...
- Page 5 2 Appliance overview 2.1 KERN EMB 200-3V Weighing pan Display Keyboard RS2323 EMB-200-3V-BA-e-1210...
- Page 6 2.2 KERN EMB 200-3V with installed density kit KERN YDB-01 Upper sample dish of the immersion basket Weighing plate "density kit" Beaker Lower sample dish of the immersion basket Platform EMB-200-3V-BA-e-1210...
- Page 7 2.3 Keyboard overview Function • Turn on/off • Calculate weighing data via interface • Menu access (longer pressing of the button) • Cancel process/input • Density determination mode to switch over to weighing mode • Numeric input / dialing digits to the right •...
- Page 8 • The balance may only be used according to the described conditions. Other areas of use must be released by KERN in writing. 3.3 Warranty Warranty claims shall be voided in case •...
- Page 9 In KERN's accredited DKD calibration laboratory test weights and balances may be calibrated (return to the national standard) fast and at moderate cost. 4 Basic Safety Precautions 4.1 Pay attention to the instructions in the Operation Manual...
- Page 10 6 Unpacking, Setup and Commissioning 6.1 Installation Site, Location of Use The balance is designed in a way that reliable weighing results are achieved in common conditions of use. You will work accurately and fast, if you select the right location for your balance. On the installation site observe the following: •...
- Page 11 6.3 Mains connection Power is supplied via the external mains adapter. The stated voltage value must be the same as the local voltage. Only use original KERN mains adapters. Using other makes requires consent by KERN. 6.4 Battery operation (optional) Remove the battery compartment cover on the underside of the scale and connect a 9 V block battery.
- Page 12 6.6 Adjustment As the acceleration value due to gravity is not the same at every location on earth, each balance must be coordinated - in compliance with the underlying physical weighing principle - to the existing acceleration due to gravity at its place of location (only if the balance has not already been adjusted to the location in the factory).
- Page 13 Press , short time later there appears „CAL F“, then the automatic return to the weighing mode. In the display there appears the value of the adjustment weight. An error during adjustment or the use of an incorrect adjusting weight will result in an error message „CAL E“.
- Page 14 7 Basic Operation Press the ON/OFF key. Start-up The balance will carry out a self-test As soon as the weight display appears, the balance is ready for weighing. Press ON/OFF button, the display disappears Switching Off Place goods to be weighed on balance. Weighing ...
- Page 15 Place an empty weighing container, the weight of the Taring weighing container will be displayed. Press the TARE button, the zero display disappears. The tare weight is saved until it is deleted. Weigh the material, the net weight will be indicated. The taring process can be repeated any number of times, e.g.
- Page 16 8 Density determination 8.1 Principle of Density Determination Three physical magnitudes are the volume and the mass of bodies as well as the density of matter. In density mass and volume are related. Density [ ρ ] is the relation of mass [ m ] to volume [ V ]. ρ...
- Page 17 Determining density of liquids The density of a fluid is determined with the help of a sinker providing a known volume [ V ]. The sinker is weighed in air [ A ] as well as in the test fluid [ B ]. According to the Archimedes’...
- Page 18 8.2.1 Density determination while using the density kits KERN YDB-01 For the density determination, we recommend to work with the optional density kit KERN YDB-01. This contains all the necessary structures and resources for a comfortable and precise determination of the density.
- Page 19 Install the density kit Disconnect scale from power supply. Remove the standard weighing plate and replace it with the density kit. Place the platform for glass containers in a way that it does not touch the weighing plate. ...
- Page 20 Procedure Access mode for the density determination of solids. Turn on the scale with , "0.000" is displayed. If the scale does not display "0.000", press Access by pressing density determination mode for solids. (example water at 19°C) "SOLId" is briefly displayed, followed by the actual entered density of the aid liquid.
- Page 21 (example) The scale determines the density of the solid and subsequently displays the result. (example) When connecting an optional printer, press to print the result. Printout example KERN YKB-01N: D-REF: 0.9976 g/cm^3 Density aid liquid Result (density of the sample) D-RSL: 8.0409 g/cm^3...
- Page 22 8.2.2 Density determination using the suspended weighing device Density determination with help of the suspended weighing device is recommended for samples that do not fit, due to size or shape, in the sample dish or glass beaker of the optional density kits. In this method, the solid is first weighed in air.
- Page 23 Calculate density Access mode for the density determination of solids. Start balance by pressing If the scale does not display zero, tare with Access by pressing density determination mode for solids. (example water at 19°C) "SOLId" is briefly displayed, followed by the actual entered density of the aid liquid.
- Page 24 Density determination “solids“ Hang the sample on the suspension device. Press and the weight of the sample in air is shown. (example) If possible, immersed the sample bubble free in the aid liquid. Make sure that the sample is at least 1 cm immersed and doesn't touch the glass beaker. ...
- Page 25 Fig.: D KERN YDB-01 with i Activate function, see chap. 8.2.1. Input parameter for aid liquid, see chapter 8.2.1. Density determinations, see chapter 8.2.1, in step 9 enter the sample under the lower sample dish.
- Page 26 Or quickly and inexpensively in our calibration laboratory. For further information please go to KERN- Hompage (www.kern-sohn.com). 8.3.1 Density determination while using the density kits KERN YDB-01. Install the density kit, see chapter 8.2.1 Mode to call up density determination of liquids.
- Page 27 Enter the density of the sinker. Press and the last digit flashes. 5. Use to increase the numeric value of the flashing cipher. to move the number selection to the right, the respective active position flashes. Confirm input by Density determination liquids Place sinker in the upper sample dish.
- Page 28 When connecting an optional printer, pressing of will print the result. Printout example KERN YKB-01N: Sinker density D-REF: 8.0409 g/cm^3 D-RSL: 0.9984 g/cm^3 Result (Density of the test liquid) Weight of sinker in air W-AIR: 020.000 g W-LDQ: 017.432 g...
- Page 29 Mode to call up density determination of liquids. 1. Turn on the scale with , "0.000" is displayed. 2. If the scale does not display, "0.000", press 3. Call up the density determination mode of liquids by pressing "Liquid" is displayed briefly, followed by the actual entered density of the sinker. Initial entry or if it is necessary to change them describes will be described later.
- Page 30 6. Confirm input by Density determination “liquids“ 7. Hang the sinker on the suspension device. 8. Press and the weight of the sinker in air is displayed. (example) 9. If possible, immerse the sinker bubble free in the aid liquid. Make sure that the sinker is at least 1 cm submerged and doesn't touch the glass beaker.
- Page 31 9 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 kit in combination with the balance. 9.1 Calculation of Results The balance displays results for density determination by giving four 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.
- Page 32 9.2.3 Liquids Solids are generally not sensitive to temperature changes, so that the corresponding density changes are not relevant. However, since you work with an aid liquid by the density determination of solids, according to the "Archimedean Principle", its temperature is taken into account. The temperature change effects liquids greater and causes changes in the density in order of 0.1 to 1 ‰...
- Page 33 10 Density Table for Fluids Density ρ [g/cm Temperature [°C] Water Ethyl alcohol Methyl alcohol 0.9997 0.7978 0.8009 0.9996 0.7969 0.8000 0.9995 0.7961 0.7991 0.9994 0.7953 0.7982 0.9993 0.7944 0.7972 0.9991 0.7935 0.7963 0.9990 0.7927 0.7954 0.9988 0.7918 0.7945 0.9986 0.7909 0.7935 0.9984...
- Page 34 11 Uncertainty of Measurement for Density Determination of Solids This table shows the approximate readability of the balance in connection with the density kit. Observe that these values have only been determined by calculation and that influent parameters such as described in chapter 6 have not been taken into consideration.
- Page 35 12 User Instructions To form a reproducible mean value several density measurement are necessary • Remove fat from solvent-resistant sample / sinker /beaker. • Regularly clean sample dishes/ sinker/beaker, do not touch immersed part with • your hands Dry sample/ sinker/pincers after each measurement. •...
- Page 36 13 Menu 13.1 Navigation in the menu Access to menu In weighing mode keep the PRINT key pressed until [Pr] appears. How to select menu items With help of , the individual menu items can be selected one after the other.
- Page 37 13.2 Menu overview Description of function Function Parameter Description of options Data transfer mode (see Data output via remote control chapter 13.4) commands (see chapter 14) rE CR* Data output by pressing the PRINT key (see chapter 14) Continuous data output (see AU PC chapter 14) Baud rate...
- Page 38 13.3 Description of individual menu items The Auto-Zero function is used to tare small variations in weight Dosing and automatically. Zero-tracking In the event that small quantities are removed or added to the material to be weighed, incorrect weighing results can be displayed due to the “stability compensation“.
- Page 39 Selection The adjustment weight can be selected out of four (CAL1 / Cal 2) predetermined nominal values (ca. 1/4; 1/2; 3/4; Max). In order to adjustment achieve high-quality weighing results in the sense of the weight measuring technology, it is recommended to select the nominal value as high as possible ...
- Page 40 Reset to factory This function resets all balance settings to factory setting. setting Keep pressed in the weighing mode until [Pr] is displayed. Press repeatedly until "rSt" is displayed. RST� Acknowledge using , the current setting is displayed. ...
- Page 41 13.4 Interface parameters Data transfer mode Keep pressed in the weighing mode until [Pr] is displayed. Acknowledge using , the current setting is displayed. PR� Select desired setting by Data output via remote control commands rE CR Data output using the PRINT key AU PC Continuous data output ...
- Page 42 • Use a suitable cable to connect the weighing balance to the interface of the printer/PC. Faultless operation requires an adequate KERN interface cable (optional). • Communication parameters (e.g. baud rate) of the scale and printer must match.
- Page 43 3. Explanation of the data transfer rE Cr: PRINT key Press the PRINT key, at stable weight is transferred. Remote control commands The remote control commands s/w/t are sent from the remote control unit to the balance as ASCII code. After the balance having received the s/w/t commands, it will send the following data.
- Page 44 Spilled weighing goods must be removed immediately. 15.2 Service, maintenance The appliance may only be opened by trained service technicians who are authorized by KERN. Ensure that the balance is regularly calibrated, see chap. Testing instruments control. 15.3 Disposal ...
- Page 45 16 Instant help In case of an error in the program process, briefly turn off the balance and disconnect from power supply. The weighing process must then be restarted from the beginning. Help: Fault Possible cause • The balance is not switched on. The displayed weight does not glow.
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