74002 b.s.& w. karl fischer titrator manual
Contents
1. S The background drift value will usually slowly decrease with time as the titration vessel becomes drier and more stable Although it is possible for the titrator to be used at high drift values it is advisable to wait until the drift lly for low water content samples in the ppm ing especia value is below 20 ug minute and stable before commenc ranges The lower and more stable the drift the more accurate the result 12 BS amp W Portable Karl Fischer Titrator PROGRAMMING A METHOD When the Model BS amp W is Ready for operation you can enter titration parameters by using PROGRAM ENTER and the Up Down Left Right keys Key Functions Press PROGRAM key to enter and exit the programming menu This key has multiple functions The Left Right key allows you the move through the different menu options The Up Down keys allow you to scroll through and manipulate the individual parameters in each menu When required parameter is displayed press ENTER RES Allows parameter values from the displayed menu to be entered into memory MENU LIST Result Format Calculation Mode Start Delay Printer Mode Print Drift RESULT FORMAT Results can be selected in ug ppm mg kg or water Display shows Result format ppm If you want to select this format press ENTER and then carry on moving through the menu using the east west keys If you want to chang2. ground connection These units are sealed and conform to CSA LR 4459 UL listings and CE requirements BS amp W titrators only require a low voltage 15V input to the electronic control circuitry The moulded plastc casing of the instrument also provides additional insulation BS amp W Portable Karl Fischer Titrator PRINCIPLE OF MEASUREMENT Karl Fischer titration is simply a means to measure water content of samples Modern instruments such as the Model BS amp W use the coulometric principle whereby the water present in the sample is coulometrically titrated to a predefined end point at which there is a minute excess of free iodine present Stoichiometrically 1 mole of water will react with 1 mole of iodine so that 1 milligram of water is equivalent to 10 71 coulombs of electricity Combining the coulometric technique with Karl Fischer titration Model BS amp W titrators determine the water content of the sample by measuring the amount of electrolysis current necessary to produce the required iodine This is an absolute technique which does not require calibration of the reagents gt 902 l2 S024 3C5H5N H20 2C5HS5N HI C5H5 N a O SO2 wz SO4CH3 A C5H5N CH30H gt Cs5sH5N_ 21 2e gt l2 Using the latest pulse current technology and a patented ACE control system the BS amp W automatically selects the appropriate titration speed dependent upon the amount of water present in the sample The titration speed is
3. reduced as the end point is approached and when the titration is completed the instrument prints out and displays SCHEMATIC OF TYPICAL TITRATION ELECTROLYSIS CURRENT DETECTOR SIGNAL END the results BS amp W Portable Karl Fischer Titrator SPECIFICATIONS amp FEATURES BSW Portable Kar Fischer Titrator 0 20 minutes selectable 90 264 VAC 47 63 Hz 12V DC car adapter internal battery 10 100ug 3ug 100ug 1 mg 5 ug above 1 mg 095 Weight weight programmable Volume density selectable ug count plus calculated mg kg ppm water Statistics Preset upto 99 runs 8 hours running time from fully charged Display amp print out indication Dimensions 10 x 9 x 5 inches 250 x 245 x 120 mm BS amp W Portable Karl Fischer Titrator UNPACKING amp PARTS LIST Inside the shipping carton you will find a yellow plastic case which contains the glassware and accessories pack and the user manual The BS amp W titrator is located inside the carry case The mains power lead power pack and in car adapter are inside the carry case lid compartment Remove all of these items and check that they have arrived undamaged After unpacking your Model BS amp W check that the glassware accessories pack contains Item l pce l pce l pce l pce l pack l pce pce 1 bottle pce l pce l pce pce l pce pce l pce pce l pce Description Titration Vessel Detector electrode Generator electrode Dr
4. BS amp W Bryant Strawn amp Walker Coulometric Karl Fischer Titrator User Manual Technical Support Ordering 281 444 6669 918 583 3109 sales wlwalker com BS amp W Portable Karl Fischer Titrator Model BS amp W v 01 06 CONTENTS Introduction spas sara E ads isa as So Page 3 Principle of Measurement sinais tasaipisia asa a eee ied Page 4 Specifications Features a minto er ts Saes SESC IGA Naa ISS da Page 5 Unpack amp Paris ist Saarna ss ssa bina aaa Page 6 Titration Cell Assembly Instructions c cece cece cece cece cece ees Page 7 8 Filling amp Changing Reagents cccceeeeeeeeeeeeeeeeeeeeeeeeees Page 9 Front amp Rear Panel DeEseripuOn sie vec dali aan CS dC OUR EE apa ad Page 10 setine Tme CCD AG cuatro Dead ST ra Page 11 Connection amp Start Up Procedure cc cece cece sis isca Page 12 Programmi A Method sore rrira a da de Page 13 14 Programming Schema ssa ead eon ha Di nade cs Page 15 Example Methods amp ApplicationS cc cece eceeeeeeeeeeeeeeeees Page 16 PNGUIGS asa ria Enf Gabe te ares Page 17 CrideollS Osta aide al da Page 17 CASES turca sn enna A dd Page 18 How To Run A Test Example V SG s esessdaecatiiectadees Page 19 PUNE grea NR DR Loading the paper 66 Page 20 Example PainCON spam iis assada Page 21 rit Compensalon pastas R noel aaa do pda aa Page 22 OVEFM AMON 25455255 Sa rio eae saws edna E sd Tn ED D
5. CLEANING GLASSWARE IMPORTANT The platinum mesh and wires of the electrodes are fragile and can be easily bent or broken Extreme care MUST be taken when disassembling cleaning and reassembling the titration cell The generator electrode is the most expensive part of the Model BS amp W glassware Coulometric reagents are flammable and toxic so care should always be taken when handling them and when cleaning the glassware Whenever possible this should be done in a safe area e g inside a fume cupboard Reagents should not be recharged while the titration cell is still attached to the titrator See page 11 on charging procedure Under normal circumstances the titration cell can be used for a large number of samples before having to replenish the reagents Once the reagents have been exhausted or when the titration cell maximum volume has been reached it should simply be necessary to l DISASSEMBLE titration cell 2 EMPTY the titration cell and generator electrode 3 RINSE all parts with methanol 4 DRY all parts 5 REASSEMBLE glassware 6 RECHARGE with fresh reagents If the cell is heavily contaminated then it may be necessary to clean it more thoroughly For oil samples cleaning with solvents for example xylene is suggested whilst for salt deposits a water wash may be required Use whichever solvent is most suited for the sample type The titration vessel can even be cleaned with hot soapy water and a bottle brush However after
6. Determination of Crude Oils by Coulometric Karl Fischer Titration Water Determination of Petroleum Products by Coulometric Karl Fischer Titration Water Determination of Crude Oils by Coulometric Karl Fischer Titration Water Determination of Petroleum Products by Coulometric Karl Fischer Titration Water Determination of Insulating Liquids Oil Impregnated Pressboard by Coulometric Karl Fischer Titration Water Determination of Natural gas by Coulometric Karl Fischer Titration Water Determination of Crude Petroleum by Coulometric Karl Fischer Titration Water Determination of Petroleum Products by Coulometric Karl Fischer Titration 16 BS amp W Portable Karl Fischer Titrator EXAMPLE APPLICATIONS LIQUID SAMPLES Liquid samples are usually introduced into the titration vessel by using a syringe The greater the amount of water introduced into the titration cell will cause the titration to take longer and also consume the reagents more quickly It is recommended that the smallest representative amount of sample be used to ensure fastest titration speed and maximum sample throughput before reagents have to be replenished Supplied as standard with every Model BS amp W titrator is a Iml syringe and luer needle These are suitable for injection of oil samples and water standards Other volume syringes are commercially available from various suppliers Please ensure that the needle is long enough to reach into the anode reagent This guide m
7. HOD l Confirm that Model BS amp W is in Ready mode 2 Flush 1 0ml syringe several times minimum 6 times with sample 3 Fit luer needle and flush through with sample 4 Draw sample into syringe beyond the required volume marking 5 Invert syringe so that any air bubbles can be ejected through the needle and adjust syringe plunger to the required volume mark 6 Wipe off excess sample from outside of needle using a clean dry tissue or paper towel T Pierce needle through injection septa of titration vessel 1 2 cm 8 Press START 9 Push needle into anode reagent and inject sample 10 Withdraw needle from titration vessel 11 Read result on display and printout 12 Repeat steps 2 11 if duplicate result required 19 BS amp W Portable Karl Fischer Titrator LOADING THE PRINTER To load the paper into the printer first open the paper roll holder lid above the print head and remove the old roll and rollers Now fit rollers to new paper roll LDC 0119 load as shown and insert the paper into the slot at the rear of the print head As soon as the printer sees the paper it will automatically load it To avoid damage to the printer mechanism it 1s advisable to only use the correct part number LDC 0119 thermal paper rolls Cut the end of the paper roll at a slight angle as shown This will make it easier to feed into the printer The mechanism has optical sensors which detect the paper and will auto feed Schematic o
8. Precondition LONG PRECONDITIONING TIME Normally caused by glassware not being sufficiently dried before assembly Re clean glassware and electrodes dry thoroughly and charge with fresh reagents PROGRESSIVELY LOWER RESULTS FOR SAME SAMPLE Moisture contamination of syringe Flush syringe and needle with sample several times before beginning new test POOR REPEATABILITY FOR SAME SAMPLE Sample size probably too small or moisture contamination of syringe Increase sample size and flush syringe and needle several times before beginning new test WARNING LETTERS ON PRINT OUT Warning letters will be printed after time of each analysis to signify the following U Uncalibrated E Calibration expired B Battery level low A ACE system active INSTRUMENT CARE Although the instrument casing is highly resistive to most solvents care should be taken to ensure that any spillage is wiped off immediately to avoid staining or possible damage to the paint surface TECHNICAL SUPPORT For technical advice and assistance our consultant coulometric KF specialist is available to discuss any questions problems or applications with you Simply email strawntsg aol com for a prompt response WARRANTY Under the conditions of our warranty all faults which are proved to be due to material construction or manufacturing defects which occur within 24 months of the delivery date will be repaired or replaced at our discretion free of char
9. S a Page 22 RCAC CMG LO ca o SS o a ecu Page 22 Clcanmo the Glass Wars pass copias seia hans Oi do DA es Page 23 TOUDICSHO OUI assimetria Page 24 WV AICANLY dessa es ds oye lada die a aaa daqui Page 24 BS amp W Portable Karl Fischer Titrator Bryant Strawn amp Walker STRAWN BRYANT is a partnership providing measurement and sampling technology for Crude Oil and Natural Gas customers pipelines terminals refineries producers The promise to our customer is STRAWN BRYANT will analyze design build and install a complete solution for measurement and sampling needs producing accurate certifiable and repeatable results Strawn Bryant integrates new technologies to provide fiscal measurement solutions using automatic sampling Ultrasonic flow meters mass flow meters water cut analyzers based on Microwave oscillator load pull technology and a host of other online sampling and analysis technologies for such properties as methanol sulphur metals and other elements as required by our customers Strawn Bryant will install test calibrate and certify results based on accumulated sample data The data gathering is done by proprietary computer programs that will produce data charts graphs or any display required by the customer Strawn Bryant also provide and insist on complete documentation training and monitoring the operation until the customer takes total ownership and has established a successful history of the data set as requir
10. ay be of assistance when selecting injection volume of samples Expected water content Suggested sample size l A0 OPM sceseed sas l or 2 ml 10 100 ppm 1 or 2 ml LOO lt 2 500 PDD ease gado 0 Sor1 ml 500 1000 ppm 0 S5or1 ml 0 001 0 01 NM ee 1 or 2 ml OL ve Wa asia senses l or 2 ml Orel amp Used Suas wae 0 S5or1 ml Dus amp MO Copel gd 0 Sorl1 ml Ie D0 Yuni 0 2ml Above O A eeni 0 1 ml or less Please note that these volumes are only a guide You may wish to experiment with sample size to determine the optimum balance between repeatability reagent depletion and speed of analysis CRUDE OILS IP 386 amp 438 ASTM D1533 D4928 D6304 API MPMS Chapter 10 9 ISO 10337 amp 12937 Most coulometric reagents contain Methanol as the main solvent and as such it is possible that waxy deposits from crude oils can drop out and contaminate the electrodes requiring more frequent and thorough cleaning of the glassware This problem can be reduced by using Cou Lo Formula A anode reagent which has been specially formulated for this application The most common interference in crude oil samples is usually caused by mercaptans or sulphides Samples containing alkyl groups will react stoichiometrically so that 100 ppm Mercaptans would show as approximately 30 ppm water 100 ppm Sulphides would show as approximately 50 ppm water In normal practice oils containing
11. cleaning with suitable solvent all glassware parts MUST be rinsed inside and out with methanol They can then be dried with a warm air blower such as a domestic hair dryer placed in a low temperature oven at 40 50 C or left in a desiccator After being fully dried reassemble the titration cell and charge with fresh reagents THE MORE THOROUGHLY THAT THE TITRATION CELL IS CLEANED AND DRIED THE FASTER THE INSTRUMENT WILL STABILISE READY FOR OPERATION AFTER RECHARGING REAGENTS Under normal conditions the Model BS amp W should be ready for operation within 5 10 minutes after reassembly however it could take up to 20 minutes before to completely stabilise if the drying procedure has not been properly carried out 23 BS amp W Portable Karl Fischer Titrator TROUBLESHOOTING OVERTITRATION Detector senses too much Iodine Usually caused by old reagents or stirrer switched off Check stirrer speed Add 3 5 microlitres of water until detector bars activate and allow to precondition In extreme cases the pins of the detector electrode may become coated with sample such as crude oils In such circumstances it is advisable to remove the detector electrode and clean the pins with a suitable solvent before continuing EXCESS DRIFT Indicates excess moisture ingress or condensation on cell walls Switch OFF Remove titration cell from clamp and gently swirl anode reagent around the cell walls Reconnect switch ON and allow to
12. e format to give results in ug mg kg or you can scroll through these options by pressing the north south keys until the required format is displayed then press ENTER 13 BS amp W Portable Karl Fischer Titrator CALCULATION MODE The Model BS amp W has two standard calculation modes in memory Each of these allow the instrument to divide the microgram count by the gram weight of sample introduced so that the calculated result can be printed out in either ppm mg kg or percentage water Press the north south keys to scroll through the options available Select the calculation modes required and press ENTER The display will prompt you with the appropriate parameters Enter the numerical value for each parameter using the north south keys to increase and decrease numbers and the east west keys to move along the decimal places Press ENTER to confirm you choice and return to the main menu The standard calculations are 1 W w Result ppm mg kg or microgram count W w Where W total weight of sampler sample gm w tare weight of empty sampler gm After entering the total weight W the instrument will return to Ready condition The Tare weight w can be entered at any time during the titration or pressing PROGRAM or at the end of titration 2 V SG Result ppm mg kg or microgram count VxSG Where V volume of sample ml SG specific gravity density of sample START DELAY TIME A start delay time ca
13. ed in the design phase The award winning product range includes the Model BS amp W offering new standards in versatility and ease of operation Designed for both Laboratory and Portable applications the Model BS amp W is ideally suited to a wide range of applications The Model BS amp W has a small footprint is easy to use and is supplied complete with carry case and low drift cell specifically designed for outdoor use The Model BS amp W offers genuine versatility and is ideally suited to crude oil and petroleum products The specially formulated titration reagents have been specifically designed for use with the BS amp W titrators Formula A anode reagent is suitable for most applications especially for water content determination of oil samples e g transformer oils crude oils etc This anode reagent is supplied in single shot bottles of 100ml No measuring of volumes is required No mixing of other solvents is required Cathode reagent Formula C is supplied in single shot 5ml vials which have safety snappers pre fitted thereby reducing risk to the operator To obtain the full benefits that this instrument can offer it is recommended that you read the entire user manual before assembling the unit Cou Lo is a registered trade mark of G R Scientific ACE control system is patented technique owned by G R Scientific Ltd All Model BS amp W power supplies are double insulated units that do not need an earth
14. ed that the titrator is NOT switched on until after the titration vessel has been charged with reagents This will avoid damage being caused to the electrodes by the stirrer bar BS amp W Portable Karl Fischer Titrator TITRATION CELL Generator III i Drying Tube Electrode Cap D Ring es ull dl assembly Screw Cap Generator o lt o Electrode I Detector Electrode Injection Port Cap Septa o Titration Vessel Stirrer Ear BS amp W Portable Karl Fischer Titrator FILLING amp CHANGING REAGENTS The Model BS amp W has been designed to operate with all major coulometric Karl Fischer reagents however optimum performance can be obtained by using Cou Lo Formula reagents which have been specifically formulated for use with these instruments For most routine applications 100ml of Formula A anode reagent and 5ml of Formula C cathode reagent should be used Cou Lo Formula reagents are especially suited for the analysis of crude oils and other petroleum products as they contain other solvents to improve sample miscibility and solubility Although reagents can be poured into the titration vessel whilst it is located on the titrator we recommend that the vessel and electrodes are removed from the instrument whilst this procedure is performed to avoid reagent spillage onto the instrument casing Any spillage onto the instrument casing should be wiped o
15. f paper feed Fit rollers onto both sides of paper roll Locate paper roll in to compartment 20 BS amp W Portable Karl Fischer Titrator PRINT OUTS The Model BS amp W allows you to select whether you would like the printer either on or off If you choose to have the printer on you will receive a hard copy of the result obtained together with the selected parameters for that particular titration every time a titration is performed The Model BS amp W automatically increments the next run number every time you press the start button The run counter is reset to zero when power is switched off and back on again A duplicate set of results can be printed out simply by holding down the start button for 3 seconds Results memory is cleared after duplicate print out or when power is switched off PRINT OUT EXPLANATION BS amp W PORTABLE V 2 3v Serial No 05001 Calibrated DD MM YYYY EXAMPLE OF V SG CALCULATION Titrator model Software version Titrator serial number Date titrator calibrated Run Date Date sample run Run 1 Run Time Nett Count 0 0 ug Drift 00 Result Format Calculation Mode V SG Run number amp time of analysis Nett microgram count after drift correction Drift value at start of titration Result format selected Calculation mode selected Sample volume Sample density Volume 1 0000 ml Density 1 0000 Res 0 0000 Calculated result water content Subsequent runs of the same sample and calcula
16. ff immediately to avoid damage or staining Remove the drying tube and injection septa Using the funnel supplied charge the titration vessel upto the lower line with Formula A reagent For your convenience these reagents are supplied in single shot bottles which contain 100ml so it is not necessary to measure any volumes simply pour in the complete bottle Also using the funnel charge the inner chamber of the generator electrode with Formula C reagent which are supplied in single shot 5 ml vials which have safety snappers pre fitted thereby reducing risk to the operator It is not necessary to clean the funnel between reagents Reconnect the drying tube and injection septa so that the titration vessel is sealed from ingress of atmospheric moisture Locate the complete titration vessel onto the titrator and connect the electrode leads onto the appropriate sockets The colours of anode and cathode reagent are only an illustration to show that there are two different liquids These are not necessarily the exact colours of the reagents being used The Model BS amp YW titrator is now ready to be switched on BS amp W Portable Karl Fischer Titrator DESCRIPTION Model BS amp W Front Panel Press start to activate selected programme and begin titration The left and right arrow keys are used to move forwards and backwards through the different program menus PROGRAM The up and d
17. ge at our premises Freight costs will be chargeable along with any inspection work which was not necessitated by manufacturing or material defects Breakages of glassware or electrodes are not covered by this guarantee In the event of instrument failure during the warranty period written authorisation must be obtained from the manufacturer prior to shipping 24
18. it is advisable to remove the detector electrode and clean the pins with a suitable solvent before continuing REAGENT LIFE There are three main factors which govern the life of reagents and therefore the frequency of cleaning and recharging the titration cell l The physical size of the titration cell allows for 50 60 mls of sample to be added For the analysis of most liquid samples e g solvents the BS amp W normally only requires a few microlitres to be injected therefore the maximum volume of 50 60 mls should not become a limiting factor 2 The total amount of water that can be analysed before saturation of the reagents varies slightly from one reagent manufacturer to another Typically a 100 ml charge of Anode reagent Formula A will analyse upto 1 gm water whilst a 5 ml charge of Cathode reagent Formula C will analyse upto 250 mg water Considering that the injected sample volume is normally small and also that the analysis is usually for the determination of low levels of water these water capacity values are not normally a limiting factor 3 Similar to all other Karl Fischer reagents coulometric reagents will deteriorate when exposed to sunlight and with increases in temperature Placing the instrument in direct sunlight or near to a heat duct can decrease the reagent life As reagents age the titration speed will reduce and the drift value will increase 22 BS amp W Portable Karl Fischer Titrator
19. less than 500 ppm mercaptans or sulphides are regarded as having no appreciable effect Repeatability problems are usually caused by sampling inaccuracies or improper homogenisation of the sample 17 BS amp W Portable Karl Fischer Titrator GAS SAMPLES Gas samples can be introduced by fitting a needle onto the gas sampling bomb and selecting Calculation mode W w Alternatively gas samples can be bubbled through the titration vessel and the passed volume measured For this method we suggest using the optional Low Drift Cell LDC 0101 complete with gas analysis kit LDC 0121 l 2 3 4 5 6 Fit the gas inlet and outlet adapters in place of the injection septa Remove the drying tube and seal the top of electrode using the injection port septa and screw cap Connect outlet adapter to wet gas flow meter Flush the sample lines and allow instrument to stabilise Press START and allow gas sample to flow through the cell at an approximate flow rate of O 5 litres minute Turn off gas flow and allow titration to reach end point Calculation G x 273 t x 22 4 W moisture content Vx 273 x 18 G microgram count V gas volume litres t water temperature of wet gas flow meter C 18 BS amp W Portable Karl Fischer Titrator HOW TO RUN A TEST Please read the section PROGRAMMING A METHOD before running any samples Example Program the Model BS amp W with required parameters for the analysis ANALYSIS MET
20. n be selected which allows time for the sample to be introduced or dissolved prior to titration current being applied Options available 0 1 2 5 10 amp 20 minutes PRINTER MODE Selecting this programme allows the printer to be turned ON or OFF Options available Off no result print out Every result will print result after every titration PRINT DRIFT Selecting this parameter allows the printing of drift value to be turned ON or OFF 14 BS amp W Portable Karl Fischer Titrator US8JIS UIEN 0 uma 0 nuaw BuiutuesBoJd Su yxa 0 awn Aue ye uoyng wesbod aul ssa nuaw UIEW SU O Una pue enjea MAU SU SAEs 0 JOJua SS Jd T L0 0 Jo sda S u jugo pue jug ugo 6n pue Ot L 09 0 jup ug JUS Jwg By 6uw wdd suondo T i suondg suondo SUILUQZ pue sulwg SUIL L SUILUG SUILUZ utup Sumo suogdo f E Jaquinu opa seal0ep sealul 0 S Y umop dn au asn soejd jewidep yore Huoje snow o Soy 46u yo SU ESN nuaw GBulwwesGoid au Jaju3 0 uopnq Wesibold au ssald uag IEW OININWVYSDOdd ITIVLHOd M 8 S g dO OILVWAHOS 15 BS amp W Portable Karl Fischer Titrator ASTM D 1533 ASTM D 4928 ASTM D 6304 IP 386 IP 438 IEC 60814 BS EN 60814 ISO 10101 3 ISO 10337 ISO 12937 EXAMPLE COULOMETRIC METHODS Water Determination of Electrical Insulating Oils by Coulometric Karl Fischer Titration Water
21. own arrow keys are used to select different program values and parameters Press the enter key to Press the program key to store to the memory access and leave the selected program program menus parameters BS amp W Rear Panel RS232C port for connection to a personal computer On off switch 3 15 Amp 20mm fuse Unscrew to check and replace fuse Power in socket 10 BS amp W Portable Karl Fischer Titrator SETTING THE DATE AND TIME Switch on the Model BS amp W and wait for it to display the following BS amp W Portable Press START Hold down the Ce key until the BS amp W displays Set Date Time DD MM YYYY HH MM SS Use the TI Left Right keys to move the cursor across the screen Use the Up Down keys to increase and decrease the values After all settings have been entered hold down the ee key for three seconds to save changes and exit OPERATION The rear panel of the Model BS amp W has a mains input socket and a separate power ON OFF switch Whilst connected to mains power supply a trickle charge is continuously applied to the battery It is therefore recommended that the instrument is used from mains power supply whenever possible so that the battery is kept fully charged Maximum battery operating time is 8 hours continuous use This may be reduced if repeated high water contents are being determined or if the printer is being continually used 11 BS amp W Portable Karl Fische
22. r Titrator CONNECTION amp START UP PROCEDURE Assemble glassware see Assembly Instructions l Charge vessel and generator electrode with reagents see Filling amp Changing Reagents Locate assembled titration vessel onto Model BS amp W Connect electrode leads 2 3 4 Connect mains lead power cord gt lay to show isp tch on rear panel and wait for di ing swi Switch ON us 6 oo a yy a D un a wy O O O o a o sa sa sa o o o J gt SG i Pr A ao ao o LD He Le a a E a o trument ms ing the black toggle switch on the front of the 1 If required adjust the stirrer speed us equilibrate O Q Q O or O E N E O K 3 E E fae Press 7 m crogram count o e oo E E E E o Cm o o CE cm os Mo o o o o He faa o JJ 2 indicator ms d battery level mai ion spee trati ti detector signal At end of the equilibration period the display will show mMm i fa dy for Is Tea the Model BS amp W 1 b te icrograms of water per minu mm tial drift has been calculated inl operation After the a E a
23. tion parameters show run number run time nett count Drift value and calculated result Run 2 Run Time Nett Count 0 0 ug Drift 00 Res 0 0000 EXAMPLE OF W w CALCULATION BS amp W PORTABLE V 2 3Vv Serial No 05001 Calibrated DD MM YYYY Run Date Run number amp time of analysis Nett microgram count after drift correction Drift value at start of titration Result format selected Calculation mode selected Weight of syringe plus sample Weight of syringe after sample injected Weight of sample analysed Run 1 Run Time Nett Count 0 0 ug Drift 00 Result Format Calculation Mode W w Total Weight 0 0000 gm Tare Weight 0 0000 gm Sample Weight 0 0000 gm E aaa Calculated result water content es 0 21 BS amp W Portable Karl Fischer Titrator DRIFT RATE COMPENSATION At the start of any titration the drift value in the top left corner of the screen in micrograms per minute is stored in memory This ensures that the displayed result is corrected for any ingress of atmospheric moisture during the titration period Whilst in READY condition the BS amp W continually compensates for any drift caused by atmospheric moisture ingress or reagent decomposition and displays this information which is updated every 10 seconds If the drift value is above 25 ug minute the display will show High Drift XX This is a warning that the value is high however the instrument can still be used by simply pressing START
24. to continue Provided the drift rate is stable then it usually acceptable to continue operation The BS amp W titration cell design can provide drift values down to less than 5 ug minute but can also operate at much higher values The maximum drift value is 60 ug minute but we recommend operating upto a maximum of 25 whenever possible If the drift value is above 60 ug per minute the display will read EXCESS DRIFT SEE INSTRUCTION MANUAL Most common causes of excess drift are Titration vessel not properly sealed check septa amp fittings Reagents almost depleted clean amp recharge the cell Sample introduced before pressing START key Trace moisture on cell walls If excess drift occurs switch the instrument off remove titration cell from clamp gently swirl the anode reagent around the cell walls replace cell in clamp switch instrument on and allow to precondition OVERTITRATION If the detector electrode senses too much Iodine in the titration cell usually caused by instrument being left un operated for a long period the display will read OVERTITRATION SEE INSTRUCTION MANUAL Simply add 3 5 microlitres of water or a small amount of a known wet sample until the detector signal bars on bottom left of display are activated Then instrument will automatically carry out its precondition In extreme cases the pins of the detector electrode may become coated with sample such as crude oils In such circumstances
25. ying tube Injection septa 10 Glass syringe Luer needle Molecular sieve Stirrer bar Funnel Thermal paper roll Mains lead Mains power pack In Car Adapter Carry case User Manual Dust cover Low Drift Cell LDC 0102 LDC 0103 LDC 0104 LDC 0106 2000 9507 2000 9508 2000 9509 2000 9512 2000 95 14 2000 9515 LDC 0119 ACCESSORIES 4014 20 US 401607 401421 201109 2000 9517 301301 BS amp W Portable Karl Fischer Titrator TITRATION CELL STEP BY STEP ASSEMBLY INSTRUCTIONS Position titration vessel on Cou Lo titrator The glass joints of the LDC do not require Teflon sleeves or grease The special screw fittings seal the vessel from ingress of moisture from the atmosphere and are easily released even after several weeks Position electrodes on titration vessel It is not necessary to overtighten these screw joints Connect leads to generator and detector electrodes Generator electrode lead connects to socket marked GENERATOR detector electrode lead connects to socket marked DETECTOR Place stirrer bar inside titration vessel Fit injection septa into plastic screw cap connectors and locate onto injection ports of titration vessel Fill drying tube with molecular sieve and locate on top of generator electrode The assembled titration cell is now ready to be charged with reagents prior to use Please be sure to assemble correctly every time the cell is cleaned or re filled It 1s recommend
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