Adam Equipment. DENSITY DETERMINATION KIT for AAA, ADA and ADP SERIES BALANCES OPERATOR S MANUAL

Transcription

1 Adam Equipment DENSITY DETERMINATION KIT for AAA, ADA and ADP SERIES BALANCES OPERATOR S MANUAL ADAM EQUIPMENT CO. LTD. pn Rev. E1, September 2000 Adam Equipment Company 2000

2 Adam Equipment Company 2000

3 The Density Kit allows users of the AAA, ADA and ADP series of balances to determine the density of solids and liquids directly using the internal program of the balance. The Density Determination software is available on all LCD display balances types ADA, ADA LE, AAA and ADP 110L, 210L, 360L and 720L models. It is also available on LED display (green digits) ADA/c balances and ADP 110, 210, 360 and 600 balances using program revision PAP14 and higher. The program revision is displayed on the balance when the power supply is first attached. The density function may not be enabled on the balance. To enable the function see appendix A. FEATURES Easy to use - all the activities are described by a message on the display for user. Reliable (all the calculations are done by the balance). Speed of test (the result is shown immediately after the sample is placed into the water or the float is placed into the liquid). Accuracy (before every measurement the balance is automatically zeroed. The user also enters the temperature of the liquid to account for density variations due to temperature or can enter the density of the liquid directly). Possibility to print the results or to send them to a PC for further analysis. Universal (the same program is used for ADA and ADP balances). Adam Equipment Company

4 COMPONENTS The kit consists of the following components. 1. Glass Float of known volume, with 2. String 3. Hook 4. Thermometer 5. Base to support beaker 6. Beaker 7. Hanger to replace pan on balance 8. Sample pan 9. Clamp for thermometer 10. Additional weights to match pan weight for ADP balances Adam Equipment Company

5 INSTALLATION Take off the pan and the draft ring around the pan if the balance is equipped with one. Place the hanger (7) in place of the pan. For the ADP and some ADA or AAA balances it is necessary to place the additional weights on the vertical wires of the hanger. These weights will match the hanger weight to the pan weight. Place the beaker support (5) over the hanger so that it does not touch. Fill the beaker with either distilled water at room temperature, alcohol or another liquid of known density. For determination of a liquid s density add the liquid to the beaker. Insert the thermometer into the liquid. Hang the sample support on the hanger if it is to be used. ADA and ADP with the Density Kit installed Adam Equipment Company

6 MEASUREMENT OF SOLID DENSITY The following notes apply to the AAA, ADA, ADA/LE and ADP/L balances. Software AR59, AU373 and above require the pressing of the key to display dashes before entering the extended menus using the F key. The LED versions use the F2 key instead of the F key and the F1 key in place of the CAL key. Apply power and allow the balance to stabilise. Press the key to zero the display. Press the F key until -Co- is displayed. -Co- is the code for measurement of density of a solid. Confirm by pressing the key. Press the F key to select either water H2O, Alcohol C2H5OH or another liquid ANOTHER. If water or alcohol is selected the display will request the temperature of the liquid by showing the message temp 00 or te_l 00 with one digit flashing. Set the values of temperature on the thermometer by pressing : - ON/OFF - changing of flashing digit to the next digit - F - increment the value of the flashing digit - - confirmation of displayed value After confirmation of the temperature value the balance will zero the display. If another liquid is selected then the display will ask for the density of the liquid with one digit flashing. Using the keys as above enter the density of the liquid. Press. After a few seconds the display will show LOAD A Put the sample mass on the top of the sample pan. (The mass of the sample in the air will be displayed). When the display is stable press the F key to enter this mass into memory The display will then show LOAD L to request the weight of the sample in the water. Put the sample on the low pan and drop the pan into the water. The mass of the sample while in the water will be displayed. When the display is stable Press the F key to enter this mass into memory. The balance will compute and immediately display the density of the sample. The result of measurement may be sent via the RS -232 interface to a printer or computer by pressing Return to the weighing mode by pressing. Adam Equipment Company

7 MEASUREMENT OF LIQUID DENSITY To determine the density of an unknown liquid it is necessary to suspend the float with a known volume in the liquid. The balance will compute the density of the liquid from the difference in mass of the float in air and in the liquid. PROCEDURE Connect the kit as described above Press the key to zero the displayed value Press the F key a few times until the display shows -Li- the measurement of density for the liquid Confirm by pressing the key. The display will request you to enter the volume of float by showing VOLUME then Enter the volume of the float. Volume has been determined to an accuracy of 0.01cm 3. The volume is stated on the hook attached to the float. The program can accept the volume of the float with an accuracy of cm 3 if required. One method to determine the volume of the float is given in Appendix B. Set the value of the float volume using the following: - ON/OFF - change the flashing digit - F - increment the flashing digit - - confirmation of the set value After confirming the volume the display will be for a few seconds then show LOAD A then The balance is requesting the mass of the float hanging in the air. Take off the beaker from the support. Put the float on the hanger (its mass in air will be displayed) When the display is stable press the F key to enter this mass into memory. The display will then change to LOAD L then The balance is requesting the mass of the float hanging in the liquid. Put the liquid in the beaker then put it on the base and hang the float so that the float is suspended in the liquid. The float should be about 10mm under the top of the liquid, (its mass will be displayed). When the display is stable press the F key to enter this mass into memory. The balance will compute and immediately display the density of the liquid. The result of measurement may be sent via the RS -232 interface to a printer or computer by pressing. Return to measuring by pressing. Adam Equipment Company

8 ATTENTION: For best accuracy follow these suggestions. Samples should be tested more than once and the average value taken. Only distilled water should be used. The water should be at a stable temperature. The sample must be degreased. The sample should not be porous. If it is porous then special preparation might be necessary. Be certain the sample is completely covered by about 10mm of the liquid. Be certain any air bubbles are removed. Dry the sample completely between tests. Be very careful not to transfer water to the top pan when using tweezers. Samples should be 5 grams or greater. Degrease the glass float before using. Dry the float completely between each test. Be careful not to put a static electric charge on the glass float. It may be necessary to use an anti-static cleaner on the float. Wash the beaker before filling it with any liquid. Place the samples on the weighing pans carefully to avoid shocks to the balance. Adam Equipment Company

9 APPENDIX A ENABLING THE DENSITY PROGRAM The function is controlled by the balance program. It is possible to enable or disable the program through the balance keypad. The following procedure allows the function to be turned on. The basic procedure is the same for all the software. However detail differences may exist between different products and different revisions of the software. The descriptions that follow are typical of the software used. If the function is disabled, the messages Co or Li cannot be seen when the F key is pressed. Only the normal balance functions will be changed using the F key. To enable the density function, a parameter in the balance program needs to be modified. To do the modification it is necessary to enter the service menu for the balance. This menu is described in the attached graphics. To enter the menu press the key. When the bars are shown during tare press both the and the key at the same time. The balance will request a code number to be entered. Using the ON/OFF key to select a flashing digit and the F key to increment the digit enter the code number Confirm the code by pressing the key, The display will prompt you through the menu structure for the software in the balance. In general it is necessary to go to the parameter bcl The parameter bcl 1 or bcl 0 will be displayed. This is the density parameter. Use the F key to change the value as necessary. bcl 0 - enables the density program bcl 1 - disables the program Press the key When the calibration function is displayed, calibr - press F1 or CAL key. You may continue to calibrate the balance by placing the calibration weight on after the display shows LOAd Or you can choose to skip the calibration by pressing at any time. The balance continues to the linearity calibration function CorLin You can select to set new linearity values, keep the old linearity values or set the linearity to zero. Unless you are prepared to set linearity, press to save the current linearity values. Adam Equipment Company

10 The other choices are: F1/CAL - set new linearity values by placing the weight called for by the balance on the pan. The weights used must be of accuracy class E2 or better. - save the current linearity correction - zero the linearity corrections coefficients. After leaving CorLin the balance returns to normal weighing. Verify the density function has been enabled by pressing the F key to view the CO- and LI- messages. If the balance software is different from any of the examples listed below contact your Dealer or Adam Equipment for more information. Supply the software revision for your balance, it is displayed when power is first applied to the balance. Adam Equipment Company

11 LED TYPE BALANCES, software version PAP 14 Press key. When there are lines on the display press and together c o d E + Using ON/OFF to change the digit and F2 to change the value, insert code Displaying quantity of divisions from transducer F1 bcl Set the specific gravity value bcl 0 enabled bcl 1 disabled F2 con Set the value of parameter F2 Abort and return to CALIbr On/Off CALIbr! AttEnte LOAD... value of calibration weight in g ATTENTION! Temperature correction coefficient will be zero Abort and return to CALIbr nocal LOAD... reload CAL! OK Setting of new temperature correction coefficient nocal LOAD... AttEnte nocal LOAD... reload CAL CORLIN F1 CAL Calibration + linearity correction reload CORLIN g F1 Saving of the old linearity correction Determine the new linearity correction..000g Zeroing of the linearity Adam Equipment correction Company coefficients F1 no CAL Calibration after 3 hours in temperature 10ºC above ambient LoAd reload CAL _ te

12 ADP Balances with LCD displays, Revision LSE2 Press. When bars are displayed press and together Using ON/OFF and F keys insert code 1948 CODE NR BAL Set the balance number. ON/OFF=choice of digit, F=choice of value =confirmation ON/OFF F Printout from EEPROM. - on ; - off or The balance displays the quantity of balance divisions. The quantity can be different and it depends on the type of balance CAL CON Set the value of stable parameter Typically: ADP : ON/OFF F AVER Averaging of the result Typically 1,2,3, F BCL Using F - changing of the value For specific gravity Parameter. F bcl=1 is disabled, bcl=0 is enabled Blocking of the calibration: CAL U 0 CAL 1 - calibration is impossible to use F CALIBR - Calibration of the balance - temperature correction coefficient! ATTENTE Zeroing of temperature coefficient of linearity correction Quit and return to CALIbr LOAD XXXX UNLOAD! ATTENTE Setting new temperature linearity correction coefficient Quit and return to CALIbr LOAD XXXX UNLOAD OK CAL CALIBRATION 0.000g CORLIN CAL. CAL. CAL. Change the temperature. to C. Leave the balance for 6 hours CORLIN CAL CAL ZERO Adam Equipment Save Company the 2000 Made linearity 2 Erase corrections corrections LOAD UNLOAD XXXXX

13 ADA with LCD display, software revision ACL2 up Press. When there are bars on the display press and together Using the ON/OFF and F keys insert code 1948 c o d E Prints the EEPROM Report. - ; - OFF S or con Set the value of stability parameter Typically: ADA 60;120;210 : ON/OFF F nrb Set the no. balance. ON/OFF choice of digit,f - choice of value, - confirmation ON/OFF F bcl Set the value of the density parameter F bcl = 0 enabled, bcl = 1 = disabled The balance shows the quantity of divisions from transducer CAL CORLIN CAL Saving of the current linearity correction Making the linearity correction. Correction for : 0g, Max, Max/2 AttEnte Zeroing of the linearity correction coefficients! calibr AttEnte Zeroing of temperature correction coefficients Resign and return to CALIbr CAL. CAL. CAL.! AttEnte Setting of new temperature correction coefficient Resign and return to CALIbr CAL. CAL. CAL. Change temp. to C. Leave the balance in that temperature for 6 hours. CAL CAL. CAL. CAL t. OK Adam Equipment Company Calibration CAL 2000 CAL. 3 CAL. CAL.

14 AU and AR revision software for ADA, AAA and ADA/LE Balances Press. When bars are on the display press and together Using ON/OFF, F, insert code 8491 code CorrEct Manual linearity value corrections to be changed F nrb (no. of the balance) te te 2 ContinuE Enter following parameters of service menu Set the factory no. of the balance. ON/OFF select digit, F increment value, - confirmation Temperature from temp. sensor in mechanism. Press to continue Temperature from temp. sensor of main board Press to continue VIEW LINEARITY CORRECTIONS STORED IN MEMORY linearity correction Value Weight where the correction is active g g Con stable measure. Value (30 50). ON/OFF select digit, F increment value, - confirmation g Zon_A Autozero t1_a (time interval) bcl Value (1,5 3,0) ON/OFF select digit, F increment value, - confirmation Value 2,0 ON/OFF select digit, F increment value, - confirmation for bcl 0 disabled, for bcl 1 enabled; F Key changes the value, to confirm g g g g EP Function for stable result prediction. Range 1 9. Nominal 5 F Key changes the value, to confirm Divisions from converter. Press key CAL to continue Calibr Calibrations. Press key: 1. CAL Calibrations OK CAUTION: 2. Zeroing of temperature coefficient 3. Calculating of new temp. coefficient Corlin LINEARITY. Press key: Adam Equipment 1. Company Saving 2000 of the current linearity 12 correction 2. Zeroing of the linearity correction coefficients 3. CAL Making new correction g g g Advance to the next linearity point Print values of EEPROM memory. - printing ; continue without printing

15 APPENDIX B A method to determine the volume of the float To determine the volume of the float the following equation can be used. V A - B = [cm 3 ] p - d A - mass of float in air [g] B - mass of float in distilling water [g] V - float volume [cm 3 ] p - distilled water Density [g/cm 3 ] d - uplift pressure of air [ 3 0, p g / cm ] = [ o ] 1013, 25 d 1 + 0, t C t - temperature of air [ o C] p - pressure of air The procedure would be to measure the mass of the float in air (value A) while it is submerged in distilled water (value B) and then put the values in for the corrections for water density (p) and air density (d) at the temperature and pressure measured using other instruments. The values for water density at various temperatures can be found in most chemistry or physics reference texts. A partial list is given below. Adam Equipment Company

16 DENSITY OF DISTILLED WATER 1 WATER DENSITY TEMPERATURE 0ºC g/cm 3 4ºC g/cm 3 10ºC g/cm 3 15ºC g/cm 3 20ºC g/cm 3 25ºC g/cm 3 30ºC g/cm Series Density of Distilled Water versus temperature ºC Adam Equipment Company

17 Adam Equipment Company

18 Adam Equipment Company 2000

19 Adam Equipment Company 2000

20 Copyright by Adam Equipment Co Ltd. All rights reserved. No part of this publication may be reprinted or translated in any form or by any means without the prior permission of Adam Equipment. Adam Equipment reserves the right to make changes to the technology, features, specifications and design of the equipment without notice. All information contained within this publication was to the best of our knowledge timely, complete and accurate when issued. However, we are not responsible for misimpressions which may result from the reading of dated material. The latest version of this publication can be found at our Website (see below) ADAM EQUIPMENT CO. LTD. Bond Avenue, Denbigh East Industrial Estate Bletchley, Milton Keynes, MK1 1SW, U.K. Website: Adam Equipment Company 2000