GB KERN MRS120-3 Operating Instructions Moisture Analyzer
Contents
1. 93 MRS BA defsi 0410 4 2 Menu control operation principle The configuration menu and the application menu each have a main path and up to two sub paths in which the parameters for the different functions of the instrument are defined Use the cursor keys A Mf 4 4 to move within the paths SET Ruta principal MRS BA defsi 0410 94 The geometry of the menu tree diagram corresponds to the path configurations of the two main menus In program operation mode the key symbols highlighted in blue apply on the control panel Designation Function in weighing mode Changes from the main menu path to the sub paths and vice versa Changing selected parameters Selecting parameters Saving the changed parameters a Moving up down within the main path or sub paths Cancelling an entry Exiting the menu Setting a space in text Ins entries adits Clearing an entry in text entries SAINT PRINT Entering a decimal point in text entries eso 95 MRS BA defsi 0410 4 3 Setting and saving the configuration Press ON OFF to switch the instrument on During the start up process keep the TARE and MENU keys pressed in until the configuration you require appears in the display then let the keys go FACTORY CONFIG Load the factory configuration USER CONFIG Load the user configuration STOR2. 5120 3 Version 1 0 01 2004 Operating Instructions Moisture Analyzer Contents cee eee ee 77 1 1 Useful tips the Operating Instructions 77 1 2 Declaration OF cODIOFPTIE asco ede E etd 79 295alelV 80 2 1 Representations and 80 2 2 aA eaten tats ed 80 SO9GLUD 7 82 3 1 ER RR 82 3 2 83 3 2 1 Transport and 83 3 2 2 Storage cisco eto 83 3 3 Inspection and assembly 84 3 4 Choosing a suitable 85 3 5 Connecting it to the 86 3 6 Safety Measures asumido 87 3 7 see ta 87 3 8 Weight calibration 88 3 9 89 4 epo 93 4 1 PANG Sheet at LUE 93 4 2 Menu control operation 94 4 3 Setting and saving the 96 4 4 Instrument configuration ssec eei eeu edo 96 4 4 1 Activating the confi
3. Serialno 3300 1 Calibration o k Status of the calibration Operator Operator ID if activated under Set Print Format see chapter 4 4 3 Configuring he report printout 7 3 2 Calibrating the temperature In order to enable a temperature calibration to take place TEMP CAL must be switched on in the configuration menu see chapter 4 4 6 Temperature calibration The temperature adjustment set must be connected to the moisture analyzer via the 5232 interface and the temperature sensor must be inserted in the sample chamber Procedure to follow e Ensure that there is no drying taking place i e that the instrument is in weighing mode emp CALIBRation e Keep pressing TARE until e TEMP CALIBRATION is e displayed Press STart KEY Once the temperature adjustment set is connected to the instrument press START STOP EMP 25 40 00 MIN e The temperature calibration is started The dryer heats up to 100 C The temperature and the time remaining for the temperature calibration are displayed in the info line It takes 20 minutes to heat up to a temperature 135 MRS BA defsi 0410 The temperature value is transmitted to the instrument from the temperature adjustment set TEMP 100 C 20 00 MIN tis heated to 160 C e The temperature value is transmitted to the instrument from the temperature adjustment set e Once the temperature calibration has ended the
4. Enter a new code In order to activate the anti theft encoding follow the same steps described for password protection 4 4 11 Key tone e KEY KEY TONE ON OFF Switch key tone on and off If the key tone is switched a short audio signal is sounded each time a key is pressed 105 MRS BA defsi 0410 4 5 Application menu operation This section explains the structure of the application menu and its functions The structure of the application menu is dynamic and can be defined in the configuration menu see chapter 4 4 4 Configuring the application menu menu option is disabled in the configuration menu it is not contained in the current application menu e The menu option RECALL METHOD cannot be switched on off it is ever present in the application menu RECALL METHOD Load a saved method STORE METHOD CLEAR METHOD METHOD SET TARGET WEIGHT UNIT Save a method Delete a saved method Enter the name of a method Definition of starting weight help Selection of the drying unit Enter the interval time for the print rate PRINT RATE Only if PRINT is also set in printformat Definition of the standby temperature STANDBY TEMP Definition of the autostart function Representation conventions e The settings programmed in the factory are depicted in bold e n order to aid clarity the only part of the menu tree shown each
5. 115 V 5x20 mm If the instrument still does not work after replacing the fuse contact the KERN Service Center DANGER Under no circumstances should you use other fuses or attempt to bridge the fuse MRS BA defsi 0410 132 7 3 Calibration The calibration of the MRS 120 3 moisture analyzer is defined in the configuration menu see chapter 3 8 Weight calibration and chapter 4 4 5 Balance calibration NOTE The balance calibration and the temperature calibration can be interrupted at any time by pressing ON OFF 7 3 1 Calibrating the balance Possible types of balance calibration External calibration by means of ICM Intelligent Calibration Mode External calibration with a freely definable weight External calibration by means of ICM Calibration weights in increments of 10g can be used for the MRS 120 3 moisture analyzer whereby the calibration weights must correspond to the precision of the instrument SET CALIBRATION MODE EXTERNAL must be set in the configuration menu see chapter 4 4 5 Balance calibration for external calibration by means of ICM e Ensure that there is no drying taking place i e that the instrument is in weighing mode Balance calibration Keep pressing TARE until e BALANCE CALIBRATION is displayed e The instrument performs a zero point measure 0000 g is displayed flashing e After the zero point measurement the display flash
6. Possible causes Weight display Instrument is not switched on does not light up Mains cord is not plugged in Mains fuse is faulty OL is The weight range has been exceeded displayed observe the information on the maximum weight range UL is The weight range is below the range of the displayed instrument weighing pan or pan holder missing 137 MRS BA defsi 0410 Fault Results of weighing are clearly incorrect The weight display changes continuously Configuration menu cannot be changed The display flashes continuously during calibration The connected printer won t work The printer prints incorrect characters Drying won t start MRS BA defsi 0410 Possible causes The instrument has not been correctly tared The instrument has not been correctly levelled The calibration is no longer correct Sharp temperature fluctuations occur e The draft is too strong at the location of the instrument e The instrument support is vibrating or fluctuating e The weighing pan is touching a foreign body e The sample is absorbing moisture e The sample is evaporating vaporising subliming e Sharp changes in temperature in the sample e The password lock is activated in the configuration menu The instrument location is not quiet enough interrupt calibration with ON OFF and move the balance to a better location e Use of a calibration weight which is too imprecise only applies to
7. report is printed Temperature calibration report printout emperature Calibration Temperature calibration report Date 16 10 2003 Time 12 51 36 Time of the calibration and instrument data Name MRS 120 3 Software 50 0000 POO Serialno 3300 1 emp Reference Identifier of the temperature adjustment set emperature 100C 100 Status of the temperature calibration emperature 160 160C emperature Calibration o k Instrument has been correctly temperature calibrated Operator Operator ID if activated under Set Print Format see chapter 4 4 3 Configuring the report printout MRS BA defsi 0410 136 7 4 Software update via Internet Downloads with Software updates are available from the Internet http www mrs kern sohn de 7 5 Error messages The instrument displays an error description in the info line NOTE If an error occurs without any corresponding description in the info line a KERN service engineer must be called Error message Starting value too small The sample weight is too small 0 200 g The sample weight must be greater than 0 200 g LOWER LIMIT x xxx g e sample weight does not lie UPPER LIMIT x xxx g within the tolerance for the starting weight 7 4 1 Notes on correcting faults Faults and their possible causes should be listed in the following table If you cannot clear the fault on the basis of the table please contact a KERN service engineer
8. tease sche 112 4 6 Special operating KEYS tee itte t i otn e adc 113 4 6 1 The tare KO 113 4 6 2 The print va 114 4 6 3 The change 117 4 6 4 The start stop Key cuius uc oe vane eto pedo Dents 117 5 Determining moisture levels eeeeeeeee 118 5 1 Fundamental 4 1 1 118 5 1 1 Adjusting to the existing measuring process 119 5 2 Sample preparation 119 5 2 1 Preventing samples being encrusted 120 5 3 Setting drying 121 5 3 1 Heating 121 5 3 2 Temperat o deed 123 5 9 9 TIRIGT 123 5 9 4 124 5 4 Application table 125 6 Data 1 51 e 127 6 1 Connection 015 128 6 2 Remote control 129 6 2 1 Examples of the remote control of the instr 130 T Service Nec ccc 131 7 1 Maintenance and 4 4 131 7 2 Replacing the mains 5 2 2 4 2
9. 140 Timer stop off Time 10 0 min Auto stop AdaptStop Free 1 20 D s Autostart off Standby Temp off Temperature 40C Unit 100 096 Weight check off Nominal 3 500 g Upper limit 4 000 g Lower limit 2 500 g etc MRS BA defsi 0410 If methods three to five exist they are also printed 116 4 6 3 Changing units If drying has already been performed or is under way the unit of measurement displayed can be changed using the change key Once drying procedure is ended the drying result be displayed in all the available units until the start of a new drying sequence using the change key Release 2 once the unit to which you wish to change is displayed 4 6 4 The start stop key e Starting drying manually Ensure that there is no drying taking place i e that the instrument is in weighing mode Press START STOP briefly The measurement is started e Stopping drying manually Drying is under Press START STOP briefly The measurement is stopped 117 MRS BA defsi 0410 5 Determining moisture levels The MRS 120 3 moisture analyzer is used as a quick and reliable means of determining the moisture content in powders and liquids by the thermogravimetric process 5 1 Fundamental principles The term moisture does not just relate to water it also encompasses all substances which evaporate when they are heat
10. Only methods currently saved are displayed in the menu If no methods are saved you cannot go to the HECALL METHOD menu If you press the E key the selected method is loaded and the dryer switches back to the weighing mode 4 5 2 3 Deleting a method e CLEAR METHOD Select a method Only the existing methods are displayed Only methods currently saved are displayed in the menu If no methods are saved you cannot go to the CLEAR METHOD menu If you press the E key the selected method is deleted and the dryer switches back to the weighing mode NOTE A saving sequence can be cancelled at any time by pressing esc 109 MRS BA defsi 0410 4 5 2 4 Setting method name e METHOD METHOD Enter the name for the method 4 5 3 Starting weight SET TARGET WEIGHT WEIGHT CHECK ON OFF _ Switch check on off NOMINAL 5 000 g Enter nominal weight UPPER LIMIT 6 000g Define upper limit LOWER LIMIT 4 0000 Define lower limit With the aid of the TARGET WEIGHT you can weigh the sample exactly to check that it matches a defined reference value plus minus permissible deviations lt are active in the display If 11 lights up this indicates that the measurement lies within the defined tolerances and the drying process can commence If the sample weight lies outside the starting weight tolerance the drying process cannot be activated In this case the starting
11. analyzer is prepared for a new measurement MRS BA defsi 0410 112 4 6 Special operating keys 4 6 1 The tare key Ensure that there is no drying taking place i e that the instrument is in weighing mode e Activating taring Press briefly A taring procedure 1 performed Activating calibration Keep TARE pressed until BALANCE CALIBRATION is displayed Release TARE The balance carries out a calibration in accordance with the settings in the configuration menu and logs these in the form of a printout see chapter 4 4 5 Balance calibration and chapter 7 3 1 Calibrating the balance e Activating a calibration test Keep TARE pressed until TEST CALIBRATION is displayed Release TARE A calibration test is performed on the balance Activating a temperature calibration Keep TARE pressed until TEMP CALIBRATION is displayed Release TARE The MRS 120 3 moisture analyzer carries out a temperature calibration and logs it in the form of a printout See chapter 4 4 6 Balance calibration and chapter 7 3 2 Calibrating the balance Activating a temperature calibration test Keep TARE pressed until TEST TEMPERATURE is displayed Release TARE The 120 3 moisture analyzer carries out a temperature test 113 MRS BA defsi 0410 The special functions of the tare key are only active if they switched on in the configuration
12. heating is switched off STD 105 C 2 3MIN The fan keeps running until the temperature in the sample room drops below 40 C e The measurement display shows the result in the unit of DURATION XX X MIN measurement set The measurement result is displayed in the other units of measurement by pressing the F key e The info line shows how long the measurement takes 91 MRS BA defsi 0410 e Open the hood e Carefully remove the weighing pan only gripping the sample holder by the handle Caution All the parts of the sample chamber are hot Allow the weighing pan and holder to cool down before doing anything else with them e Insert a new weighing pan into the instrument e Press the TARE key the instrument is ready for you to perform a new measurement CAUTION The weighing pan and holder are hot MRS BA defsi 0410 92 4 Operation The MRS 120 3 moisture analyzer has two main menus the configuration menu and the application menu Instrument specific parameters and the layout of the report printout are defined in the configuration menu You can either work with the basic configuration programmed in the factory or define and save user configuration which is adapted to suit your specific needs Dryer specific parameters can be set in the application menu The weighing help is also activated and defined in this menu 4 1 Panel Sheet ON MENU us A To om
13. it is shipped or transported and to store the MRS 120 3 under optimum conditions if it is out of operation for an extended period Follow instructions carefully when you unpack the MRS 120 3 moisture analyzer in order to avoid damaging it e Unpack the instrument carefully and gently This is a precision instrument e When temperatures outside are very low the balance should first be stored for a few hours in the unopened transport package in a dry room at normal room temperature so that no condensation settles on the balance when it is unpacked e Check the moisture analyzer for any external visible signs of damage immediately after you unpack it If you find that it has been damaged in transit notify your KERN service agent immediately e If the MRS 120 3 moisture analyzer is not being put into operation immediately after purchase store it in a dry place with minimal fluctuations in temperature Cap 3 2 2 Storage e Read these Operating Instructions carefully before operating the balance even if you have used KERN equipment before and pay particular attention to the safety instructions Cap 2 Safety MRS BA defsi 0410 82 3 2 Transport storage 3 2 1 Transport and shipping Your MRS 120 3 moisture analyzer is a precision instrument Treat it with care Avoid shaking it or subjecting it to any heavy jolts or vibrations during transport Avoid serious temperature fluctuations and getting the instrument damp condensat
14. menu A calibration or a calibration test procedure can be interrupted by pressing ON OFF This applies both to the balance and to the temperature 4 6 2 The print key Ensure that there is no drying taking place i e that the instrument is in weighing mode e Printing out an individual value or a report Press PRINT briefly The drying report is printed out The report for the last measurement can be printed out at the start of a new drying procedure Reports printed afterwards do not contain any interim results It is otherwise identical to the drying report which is printed during the measurement If no drying has been performed since the instrument was started up the weight value is printed Resetting thecounter to 1 Keep PRINT pressed until RESET COUNTER is displayed Release PRINT The counter is reset to 1 e Printing the instrument settings Keep PRINT pressed until PRINT STATUS is displayed Release PRINT The instrument settings are printed MRS BA defsi 0410 114 Status printout for the settings Date 07 10 2002 Time 16 12 39 Name MRS 120 3 Software N50 0040 POO Serialno 3300 1 Instrument identification Print Printformat Date and Time Balance ID on Method ID gt on Counter Dryer Setup on Print rate off Operator ID off Print rate 1 0 min Operator Printer Report printout settings Calib
15. the measurement has ended by means of ADAPTSTOP password protection to prevent unauthorized changes to the instrument configuration and drying parameters e anti theft code e printout in line with GLP guidelines Good Laboratory Practice e software update via the Internet 1 1 Useful tips on the Operating Instructions Take the time to read these Operating Instructions from start to finish so that you can make full use of the many benefits and possibilities of the MRS 120 3 in your day to day work These Operating Instructions contain guidance in the form of pictographs and keypad diagrams which should help you in finding the required information Key names are presented inside quotation marks and are highlighted bold font ON OFF or 22 In order to aid clarity in the explanation of the operating steps the display for each step is shown graphically on the left alongside the list of operating steps 77 MRS BA defsi 0410 Display shows List of operating steps Sprache Deutsch e If you press the A key repeatedly SPRACHE DEUTSCH Langue francaise LANGUAGE ENGLISH or or LANGUE FRANCAISE appears in the display language english See section 2 Safety for the symbols to indicate risks and tips MRS BA defsi 0410 78 12 Declaration of conformity KERN amp Sohn GmbH WAAGEN GEWICHTE BALANCES WEIGHTS Ziegelei 1 Tel 0049 0 7433 9933 0 2 D 72336 Baling
16. until you have had it checked by a KERN service engineer The connection ports on the back of the instrument may not come into contact with liquids Regularly dismantle the weighing pan and the weighing pan holder and remove any dirt or dust from under the weighing pan and on the balance housing with a soft brush or a soft lint free cloth moistened with a mild soap solution The balance pan and the holder can be cleaned under running water Take care to ensure that both parts are completely dry before they are re installed on the balance CAUTION Never use solvents acids alkalis paint thinners scouring powders or other aggressive or corrosive chemicals for cleaning since these substances attack the surfaces of the instrument housing and can cause damage Regular maintenance of the MRS 120 3 moisture analyzer by your KERN service agent will guarantee unrestricted functioning and reliability over many years and will extend the lifespan of the instrument 131 MRS BA defsi 0410 7 2 Replacing the mains fuse If the display remains dark after you switch on the instrument this generally means that the instrument s fuse is faulty and has to be changed Unplug the instrument from the mains before replacing the fuses Screw open the fuse holder on the back of the instrument using a screwdriver screwing anticlockwise Replace the faulty fuse 230 volt variant T 3 15 A 230 V 5x20 mm 115 volt variant T 6 3 A
17. weighing pan e Make course samples smaller using a mortar or grinder Do not expose the sample to any heat while you are grinding it as this will lead to a loss of moisture 119 MRS BA defsi 0410 Liquids 4 e You are advised to use a fiber glass filter for liquids pastes or slurry samples The fiber glass filter offers the following advantages even distribution on account of the capillary effect no formation of drops quick evaporation due to the larger surface 5 2 1 Preventing samples being encrusted In order to avoid the sample becoming encrusted solvent can also be added to the sample after the measurement has started The solvent added has no bearing on the final result of the measurement e Start the measurement automatically or by pressing the START STOP key The dryer hood can be opened again within 5 seconds of the start During this time the words START DRYING are displayed in the info line of the display e After opening the sample chamber you can add additional solvent at any time until the hood is closed Once the dryer hood is closed the measurement is continued START COVER CLOSE appears in the info line in the display If you press the START STOP key the measurement is interrupted The additional solvent is taken into account in the measurement printout because all the interim values are calculated on the basis of the current weight value However it has no b
18. weight tolerances are displayed on the screen as an error message 4 5 4 Units 100 0 0 100 ATRO 100 999 ATRO 0 999 G KG RESIDUAL WEIGHT WEIGHT LOSS BALANCE WEIGHT The unit of the measurement results printed in the report can be selected in the UNIT menu option The defined unit is also used to print out interim values The unit of measurement for the printout can only be changed before and not during a measurement The unit selected is also used as the display unit although it can also be adjusted during and after the measurement see chapter 4 6 3 The change key MRS BA defsi 0410 110 Description calculation of the units Explanation of the variables used e MW Moist weight weight value at the start of the measurement e DW weight weight value at the end of the measurement Unit Calculation Dry mass in percent 100 0 DW 100 y mass in percent MW Moisture in percent O 100 EX 100 96 ATRO dry mass ATRO 100 999 DE 10096 ATRO moisture ATRO 999 100 E _ DW Residual weight in kg 9 9 yw 1000 Residual weight in g RESIDUAL WEIGHT DW Moisture in g WEIGHTLOSS MW DW Current balance weight in g BALANCEWEIGHT NETWEIGHT Explanations for the ATRO units The ATRO unit is required exclusively in the wood industry In practice wood contains different amounts of water which can change continuously The water content affects the combustion perf
19. 0 104 73 03 815 Charcoal 810 120 38 f 810 10 3 5 2 4 5 7 10 4 5 4 5 10 MRS BA defsi 0410 126 6 Data transfer The MRS 120 3 moisture analyzer is equipped with an RS232 V24 interface for data transfers to peripheral instruments Before the data transfer the RS232 interface must be matched with the one in the peripheral instrument in the instrument s configuration menu see chapter 4 4 7 Interface functions e Handshake The handshake is set in the factory to NO It can be set to software handshake XON XOFF or to hardware handshake e Baud rate Possible baud rates 300 600 1200 2400 4800 9600 or 19200 baud e Parity Possible parity 7 even 1 stop 7 odd 1 stop 7 no 2 stop or 8 no 1 stop 12V SB 1 7 even 1 SB 6 6 DA DA DA DA B DA 6 DA SB Start bit PB Parity bit DA Data bit SP Stop bit Displa S D7D6D5D4D3D2D1 DO UUU Data transfer takes place in ASCII code 112134156 7181911011 12 131141151 07 06 05 04 03 02 01 DP DO U CRLF 127 MRS BA defsi 0410 Blank space 5 Prefix space DP Decimal point DO D7 Digits Unit only if the weight is stable otherwise unit is sent CR Carriage return LF Line feed NOTE Unused positions are filled with spaces The decimal point DP can be between DO and D7 6 1 Connection
20. 1 132 7 3 s essere E 133 7 9 1 Calibrating the 133 7 3 2 Calibrating the 135 7 4 Software update via 137 7 5 Error s etes codon 137 7 4 1 Notes on correcting 137 e 139 8 1 139 8 2 Configuration menu tree 141 8 2 1 Application menu 143 8 2 2 Key MENUS 145 8 2 3 Setting drying parameters 146 8 2 4 Setting and saving the configuration 146 MRS BA defsi 0410 76 1 Introduction MRS 120 3 moisture analyzer is simple and functional to operate It is used as a quick and reliable means of determining the moisture content in powders and liquids by the thermogravimetric principle The key features of the MRS 120 3 high end balance technology built to the highest international standard optimum resolution easy to read vacuum fluorescent display large viewing window for perfect sample monitoring a memory for 5 methods with all the drying settings automatic detection that
21. 10 SDTmmddyy Set date and time Month Day Year Hour Minutes hhmmss Seconds T ttt Tare or set tare to a specific value ZERO Set instrument to 0 if weight is stable and within the zero setting range Rttt Adjusts the heating to the required temperature 30 230 C ROFF Switch off heating Print weight value and temperature value PWT ttt t Print with time basis in s ttt t switch off by transmitting PWT NOTE Each remote control command must terminate with CR LF The commands are acknowledged if required 6 2 1 Examples of the remote control of the instr Description of the function activated Five dashes are displayed DTEST123 tESt123 is displayed D Thedispiayis dark T10 10 000 g Tare set to 10 g 1 000 g Tare set to 10 Instrument is tared Adjusts the temperature to 100 C MRS BA defsi 0410 130 7 Service 7 1 Maintenance and servicing The MRS 120 3 moisture analyzer must be treated carefully and cleaned regularly This is a precision instrument DANGER To facilitate maintenance work the instrument must be disconnected from the power supply Also ensure that the instrument cannot be reconnected to the power supply during the work by anyone else Take care during cleaning that no liquid gets into the instrument If you spill any liquid onto the instrument unplug it from the electrical supply immediately Do not operate the MRS 120 3 moisture analyzer again
22. 7 MRS BA defsi 0410 38 Weight calibration Since the Earth s gravity is not the same everywhere each balance must be adjusted to compensate for the gravity at each location in accordance with the underlying physical weighing principle This adjustment process which is known as calibration must be carried out on initial installation and then each time the instrument is moved to another location However in order to get exact measurements the instrument should also be recalibrated periodically The MRS 120 3 moisture analyzer must be calibrated when it is initially installed and then each time it is moved to another location If you work in accordance with Good Laboratory Practice GLP observe the prescribed intervals between calibrations adjustments The calibration is set in the configuration menu see chapter 4 4 5 Balance calibration With the aid of the Intelligent Calibration Mode ICM the instrument can determine the size of the calibration weight itself facilitating exact calibration with different size weights in 10 0 increments see chapter 7 3 1 Calibrating the balance MRS BA defsi 0410 88 3 9 First measurement Once the MRS 120 3 moisture analyzer is successfully up and running you can perform an initial measurement to familiarize yourself with the new instrument and to test it for any malfunctions Switch the instrument on using the ON OFF key The instrument performs a self diagnos
23. ATRO 0 999 G KG RESIDUAL WEIGHT WEIGHT LOSS BALANCE WEIGHT MRS BA defsi 0410 8 2 3 Setting drying parameters HEATING PROGRAM HEAT MODE STANDARD BOOST SOFT DRYING TEMPERATURE TEMPERATURE 105 C DRYING Time STOP TIME 10 0 MIN TIMER STOP ON OFF STOPMODE AUTOSTOP OFF Digit Time Percent Time ADAPTSTOP 8 2 4 Setting and saving the configuration MENU and TARE keys are pressed during switch on FACTORY CONFIG Load the factory configuration USER CONFIG Load the user configuration STORE CONFIG Save the current user configuration MRS BA defsi 0410 146
24. C 5 0Min 37 70 tabs in the MODE PC 100 6 0Min 29 84 100C 7 0 Min 24 38 100 8 0 22 64 100 8 2 22 60 QE Drying results are always output Residual weight 0 494 g Stop Autostop Duration 8 2 min Operator ID if this is switched 99 MRS BA defsi 0410 4 4 4 Configuring the application menu SET APP MENU EDIT METHOD ON OFF METHOD ID ON OFF TARGET WEIGHT ON OFF ON OFF PRINT RATE ON OFF STANDBY TEMP ON OFF _ AUTOSTART ON OFF The options activated under SET APP MENU are enabled in the application menu and can be changed and set there see chapter 4 5 Application menu operation 4 4 5 Balance calibration e SET BALANCE MODE OFF disabled MODE EXTERNAL external MODE EXT DEF external with a freely defined weight DEF n nnn g DEF 0 0000 g Calibration weight for the EXT DEF mode For details about calibrating the balance see chapter 3 8 Weight calibration 4 4 6 Temperature calibration TEMP CAL EMP CAL ON OFF Activate the temperature calibration In order to calibrate the temperature see chapter 7 3 2 Calibrating the temperature MRS BA defsi 0410 100 4 4 7 Interface functions e SET INTERFACE BAUDRATE Select the BAUDRATE baud rate BAUDRATE BAUDRATE BAUDRATE BAUDRATE BAUDRATE PARITY 7 EVEN 1STOP Select the PARI
25. E CONFIG Save the current configuration as the user configuration 4 4 Instrument configuration This section explains the structure of the configuration menu and its functions Definable functions SET DATA PRINT SET APP MENU SET BALANCE CAL TEMP CAL SET INTERFACE SET DATE AND TIME PASSWORD THEFTCODE KEY TONE CONTRAST LANGUAGE MRS BA defsi 0410 Print formats type of values to print Defining the application menu Balance calibration method Activate the temperature calibration Baud rate parity handshake functions of periphery interface Date and time standard format or American format p m and a m Password protection for the menu definitions Activation deactivation and change to the anti theft code Activation of the keypad sound Not described Language E D F 96 Representation conventions e The settings programmed in the factory are depicted in bold e In order to aid clarity the only part of the menu tree shown in each function description is the part which relates to the function in question Explanations on the menu functions are depicted in italics 4 4 1 Activating the configuration menu Press ON OFF to switch the MRS 120 3 on Keep the key pressed in continuously during the start up process which takes about ten seconds until SET DATA PRINT appears in the display e You now change the config
26. FORMAT STANDARD US PASSWORD PASSWORD DATA PROTECTION OFF DATA PROTECTION MED DATA PROTECTION HIGH NEW PASSWORD e THEFTCODE THEFTCODE THEFT PROTECTION OFF THEFT PROTECTION NEW CODE a e KEY TONE KEY TONE ON OFF MRS BA defsi 0410 142 CONTRAST CONTRAST e LANGUAGE LANGUAGE ENGLISH SPRACHE DEUTSCH LANGUE FRANCAISE 8 2 1 Application menu tree MENU Key is pressed during operation e RECALL METHOD RECALL METHOD e STORE METHOD CLEAR METHOD CLEAR METHOD METHOD ttt WEIGHT CHECK ON OFF NOMINAL 5 000 g UPPER LIMIT 6 000 g LOWER LIMIT 4 000 g 143 MRS BA defsi 0410 UNIT UNIT 100 0 0 100 ATRO 100 999 ATRO 0 999 G KG RESIDUAL WEIGHT WEIGHT LOSS BALANCE WEIGHT e PRINT RATE e STANDBY TEMP STANDBY TEMP ON OFF TEMPERATURE e AUTOSTART ON OFF MRS BA defsi 0410 144 8 2 2 Key menus Hold the appropriate key down until the required menu option appears in the info line The options PRINT and TARE are not displayed not displayed RESET COUNTER PRINT STATUS PRINT APPLICATIONS not displayed BALANCE CALIBRATION TEST CALIBRATION TEMP CALIBRATION TEST TEMPERATURE 145 e Change key 100 0 0 100 ATRO 100 999
27. TY 7 ODD 1STOP parity PARITY 7 NO 2STOP PARITY 8 NO 1STOP HANDSHAKE NO Select the HANDSHAKE XON XOFF handshake HANDSHAKE HARDWARE function The RS232 V24 interface on the instrument is matched to the interface of a peripheral instrument with the aid of the interface functions see chapter 6 Data transfer 4 4 8 Date and time SET DATE AND TIME DATE DD MM YY Set date TIME HH MM SS and time FORMAT STANDARD US If a power failure occurs the timer keeps running If this doesn t happen this indicates that the instrument s backup battery has run out and has to be replaced by KERN Customer Service 101 MRS BA defsi 0410 4 4 9 Password protection The two main menus and the drying parameters for the MRS 120 3 can be protected against unwanted changes by using a freely selectable four digit password e lf the password protection is deactivated any operator change the instrument settings e f medium password protection is activated the configuration menu is protected against unwanted changes e f high password protection is activated the configuration menu the application menu and the drying parameters are protected The disabled menu options and parameters can only be changed again by deactivating the password protection i e by entering the correct password NOTE The password protection is deactivated in the factory settings The preprogrammed password set in
28. defsi 0410 Procedure for changing the password e Enter the password and press DATA PROTECTION MED e The current data protection status is now displayed e Press new PASSWORD 6100 e Enter the new password e e g 6123 procedure as described above new PASSWORD 6123 e Press A to save the entry 4 4 10 Anti theft encoding The instrument can be protected against theft by using a freely selectable four digit numerical code e fthe anti theft code is deactivated the instrument can be switched on again and operated after a power cutoff without having to enter a code e fthe anti theft code is activated the instrument asks for the code to be input after each power cutoff e If the code is entered incorrectly the instrument is blocked e fthe instrument is blocked it must first be disconnected from the power supply then reconnected and unblocked by entering the correct code e After seven consecutive incorrect entries the display reads NO ACCESS CALL SERVICE In this case only a KERN service engineer can unblock the instrument again The anti theft encoding is deactivated in the factory settings The preprogrammed code set in the factory is 8937 This code is the same in all KERN instruments Therefore for security reasons enter your own code Keep your own code in a safe place MRS BA defsi 0410 104 THEFTCODE Switch encoding on off NEW CODE
29. earing on the drying result because the solvent has completely dried off MRS BA defsi 0410 120 5 3 Setting drying parameters The drying parameter setting procedure is started with the four function keys under the display Each of the four function keys starts the entry of the corresponding drying parameter The parameters are entered or changed in the same way as the menu operation procedure except that only the current parameter can be changed each time 5 3 1 Heating program This function key is used to start the heating program selection There are three heating programs available for determining the moisture content e Standard drying e Boost drying 0 1Min 99 9Min e Soft drying e HEATING PROGRAM HEAT MODE STANDARD Select the heating program BOOST BOOST time selectable The BOOST Time can be set in 0 1 min increments from 0 1 min 99 9 min Standard drying The drying temperature is predefined by the user The end temperature is started up with a high heat output and is kept constant with slight overshooting This program is used for most samples 121 MRS BA defsi 0410 T C tls Boost drying The drying temperature is predefined by the user During the selected time 0 1Min 99 9Min of drying the target temperature is exceeded by 40 Once this time has elapsed the temperature is adjusted down to the target temperature The temperature is started up with a high heat output T
30. ed Alongside water they also include fats oils alcohol solvents etc There are different techniques for determining the moisture of a material Thermogravimetry is the technique used in the MRS 120 3 In this technique the sample is weighed before and after heating so as to determine the moisture content from the difference The conventional drying oven technique works on the same principle except that the measurement takes much longer In the drying oven technique the sample is heated from the outside inwards by a stream of hot air so as to draw out the moisture In the case of the halogen radiation used in the MRS 120 3 the radiation mainly penetrates into the sample where it is converted into heat energy heating the sample from the inside out A small portion of the halogen radiation is reflected by the sample this reflection is lower in dark samples than in light samples The penetration depth of the halogen radiation depends on the permeability of the sample In the case of low permeability samples the halogen radiation only penetrates into the upper layers of the sample which may lead to incomplete drying charring or combustion Consequently the sample preparation is extremely important MRS BA defsi 0410 118 5 1 1 Adjusting to the existing measuring process The MRS 120 3 moisture analyzer is frequently used in place of other drying techniques like the drying oven because it is easier to operate a
31. en Fax 0049 0 7433 9933 149 E Mail info kern sohn com Internet www kern sohn com Declaration of conformity Declaration of conformity for apparatus with CE mark Konformit tserkl rung f r Ger te mit CE Zeichen D claration de conformit pour appareils portant la marque CE Declaraci n de conformidad para aparatos con disitintivo CE Dichiarazione di coformit per apparecchi contrassegnati con la marcatura CE English We hereby declare that the product to which this declaration refers conforms with the following standards Deutsch Wir erkl ren hiermit da das Produkt auf das sich diese Erkl rung bezieht mit den nachstehenden Normen bereinstimmt Fran ais Nous d clarons avec cela responsabilit que le produit auquel se rapporte la pr sente d claration est conforme aux normes cit es ci apr s Espa ol Manifestamos en la presente que el producto al que se refiere esta declaraci n est de acuerdo con las normas siguientes Italiano Dichiariamo con ci che il prodotto al quale la presente dichiarazione si riferisce conforme alle norme di seguito citate Moisture Balance KERN MRS120 3 Mark applied _ BN B Date 02 03 2004 Signature Gottl KERN amp Sohn GmbH Management Gottl KERN amp Sohn GmbH Ziegelei 1 D 72336 Balingen Tel 49 0 7433 9933 0 Fax 49 0 7433 9933 149 79 MRS BA defsi 0410 2 Safety 2 1 Representations symbols Important safety related inst
32. es the recommended calibration weight e Put the calibration weight on 133 MRS BA defsi 0410 e the display stops flashing this indicates that the calibration has ended External calibration with a freely definable weight SET CALIBRATION MODE EXT DEF must be set in the configuration menu se chapter 4 4 5 Balance calibration for external calibration with a freely definable weight You then need to enter the effective value of the calibration weight DEF n nnnn g with up to ten times the precision of the instrument balance NOTE Is calibrated with the free weight so only this weight may be used Procedure to follow Balance calibration 0000 9 22 150 9 MRS BA defsi 0410 Ensure that there is no drying taking place i e that the instrument is in weighing mode Keep pressing TARE until BALANCE CALIBRATION is displayed The instrument performs a zero point measure 0000 g is displayed flashing After the zero point measurement the display flashes the calibration weight entered beforehand Put the calibration weight on The display flashes Once the display stops flashing this indicates that the calibration has ended the precise value 1 displayed 134 Calibration report printout Balance calibration report Date 16 10 2003 Time 12 51 36 ime of the calibration and instrument data Name MRS 120 3 Software N50 0000
33. external calibration e The printer is not switched on e The data cable is faulty or not connected e The interface settings do not match the moisture analyzer e The parity setting or the baud rate of the interface don t match e The data cable is faulty e The sample is not stable 138 8 Overview 8 1 Technical data Heat source heater type Weighing range g Readability g Drying Readability Reproducibility in approx 19 Reproducibility in approx 10g Sample weight g Result calculations Halogen 120 0 001 0 01 0 2 0 02 0 2 120 100 0 0 100 100 999 ATRO 0 999 G KG RESIDUAL LOSS Heating Temperature range C Increment C Heating methods Intervals Booster Switch off criteria Autostop d s 30 230 1 Standard Boost Soft Boost 1 1 99 40 during selectable time 4 fixed settings or freely definable 1 99 10 90 Digit Time Percent Time Timer stop min 0 1 240 0 Monitoring Viewing window X Audio X Printout GLP x Printout Interval min 0 1 10 0 Sample numbering X 139 MRS BA defsi 0410 Memory capacity Methods with all settings 5 User texts 2 Operation Easy access sample holder X Display VFD Keypad 10 keys Password protection X Special features Initial weighing with limits Initial weighing help Software download and update X Calibration Balance Temperature
34. fully automatic Miscellaneous Timer for date and time Interface for PCs and printers KERNBus Digital Anti theft protection Connection Mains voltage Mains frequency Hz Power consumption W Dimensions Instrument housing WxHxD mm Weight kg MRS BA defsi 0410 with a test weight at 100 C and 160 C RS232 optional Code and mechanically 230V or 115V Can be switched by changing the unit of heat may only be done by KERN Service 50 60 450 210x170x340 6 3 140 8 2 Configuration menu tree MENU Ke pressed during switch on e SET DATA is SET PRINTFORMAT DATE AND TIME ON OFF BALANCE ID ON OFF METHOD ID ON OFF COUNTER ON OFF DRYER SETUP ON OFF PRINT RATE ON OFF OPERATOR ID ON OFF PRINT RATE 1 0 MIN OPERATOR ttt MODE PRINTER PC e SET APP MENU EDIT METHOD ON OFF METHOD ID ON OFF TARGET WEIGHT ON OFF UNIT ON OFF AUTOSTART ON OFF e SET BALANCE CAL OFF EXTERNAL EXT DEF 0 0000 g e TEMP CAL TEMP CAL ON OFF 141 MRS BA defsi 0410 BAUDRATE 300 BAUDRATE 600 BAUDRATE 1200 BAUDRATE 2400 BAUDRATE 4800 BAUDRATE 9600 BAUDRATE 19200 PARITY 7 EVEN 1STOP PARITY 7 ODD 1STOP PARITY 7 NO 2STOP PARITY 8 NO 1STOP HANDSHAKE NO HANDSHAKE HANDSHAKE HARDWARE SET DATE AND TIME DATE DD MM YY TIME HH MM SS
35. function description is the part which relates to the application in question Explanations on the menu functions are depicted in italics MRS BA defsi 0410 106 4 5 1 Activating the application menu Press MENU following the start up process in order to get to the application menu 4 5 2 Methods The MRS 120 3 supports the saving of five different methods One method comprises the settings for the drying program and the starting weight help The following data is saved for each method e Name of the method e Drying program with Drying mode Drying temperature Stop time Autostop Autostart setting Standby temperature Unit for the result Starting weight with Nominal weight Upper weight limit Lower weight limit If the dryer is in weighing mode and the current starting weight is lower than the minimum sample weight 0 2 g the name of the method currently loaded is displayed in the info line If the entry EDIT METHOD is switched off in the configuration menu under Set application menu see chapter 4 4 4 Configuring the application menu the menu options STORE METHOD and CLEAR METHOD no longer active Consequently the methods saved are protected against changes or can only be processed with existing saved methods All the current methods and their settings can be printed by keeping the PRINT key pressed in until PRINT APPLICATIONS appears see chapter 4 6 2 The print key 107 MRS BA def
36. guration menu 97 4 4 2 Language 97 4 4 3 Configuring the report 98 4 4 4 Configuring the application menu 100 4 4 5 Balance calibration 100 4 4 6 Temperature calibration 100 4 4 7 Interface 101 4 4 8 Date ATTN Gs te acct 101 4 4 9 Password protection ooo 102 4 4 10 12 104 4 4 11 105 4 5 Application menu operation 106 4 5 1 Activating the application 107 4 5 2 MOTOS 107 4 5 21 Saving a mielhod oett 108 4 5 2 2 Loading a3elliOO asc 109 75 MRS BA defsi 0410 4 5 2 3 Deleting a 0024222112 109 4 5 2 4 Setting method teneras 110 4 5 3 Starting weight 110 4 5 4 UNITS 110 4 5 5 Prntrale ME esee 112 4 5 6 Standby 112 4 5 7 PULOSTAM eet auae bosse
37. he maximum temperature reached during the boost is 230 This program is used for samples with a very high moisture content T C 100 1 1805 t s Soft drying The drying temperature is predefined by the user The end temperature is started up gently with a low heat output The end temperature is reached after approx 4 minutes MRS BA defsi 0410 122 This program is used for samples with a low moisture content in which there is a risk of combustion 2405 t s 5 3 2 Temperature E This function key is used to start the drying temperature input The drying temperature can be entered in 1 increments from 30 230 After 10 minutes temperatures higher than 200 C are automatically adjusted down to 200 C over the course of the next 20 minutes e DRYING TEMPERATURE EMPERATURE 105 C Temperature input The temperature setting for drying with the MRS 120 3 is lower than in the case of drying with the drying oven technique 5 3 3 Timer stop This function key is used to define the drying time If the timer stop is switched the measurement procedure is ended once the time set has elapsed The time can be set in 0 1 min increments from 0 1 min 240 0 min DRYING TIME STOP TIME 10 0 Only if the timer stop is switched on IMER STOP 123 MRS BA defsi 0410 5 3 4 Switch off criteria This function key is used to start
38. ion during transport NOTE The MRS 120 3 moisture analyzer should ideally be shipped and transported in its original packaging to avoid damage in transit 3 2 2 Storage If you do not intend to use the instrument for a long time unplug it from the electrical supply clean it thoroughly and store it in a place that meets the following conditions No serious shaking or vibrations No serious fluctuations in temperature No direct exposure to sunlight No moisture The MRS 120 3 moisture analyzer should ideally be stored in its original packaging because it gives it optimum protection 83 MRS BA defsi 0410 3 3 Inspection and assembly The moisture analyzer does not come fully assembled Once you have unpacked all the parts check that the delivery is complete and assemble the individual components in the order indicated below Components delivered Components delivered MRS 120 3 moisture analyzer In use cover for the display Mains cord 30 sample pans 4 Draftshield 1 Operating Instructions Pan support 2 Warranty card Sample holder 3 Declaration of conformity MRS BA defsi 0410 84 Assemble the in use cover for the display e Open the hood and insert the draftshield 1 making sure that it is placed on flat e Insert the pan support 2 and turn it so that it locks securely in place e Insert the sample holder 8 as shown e You can now place an aluminium pan 4 on the pan supp
39. nalyzer in areas where there is any risk of explosion Sample materials which release toxic substances must be dried ina fume hood Take care not to inhale any harmful vapors Ensure that no liquid seeps inside the instrument or into the connection ports on the back of the instrument If you spill any liquid onto the instrument unplug it from the electrical supply immediately Do not operate the moisture analyzer again until you have had it checked by a KERN service engineer CAUTION Some of the parts like the heating element and the viewing window may become considerably hotter while it is in operation Only touch the instrument using the handles provided Take care when you remove the sample The actual sample the heating unit and sample pans used may still be very hot The MRS 120 3 should generally be used for drying substances containing water Sample materials which give off aggressive vapors like acids may cause corrosion problems to develop on parts of the instrument If any damage or injury occurs liability and responsibility rest with the user 81 MRS BA defsi 0410 3 Setup 3 1 Unpacking The MRS 120 3 moisture analyzer comes in environmentally friendly packaging specifically developed for this precision instrument which provides optimum protection for the instrument during transportation Retain the original packaging in order to avoid the MRS 120 3 moisture analyzer becoming damaged in transit when
40. nd offers shorter measuring times Consequently the conventional measuring process has to be adapted to the MRS 120 3 so that comparable results can be achieved e Performing a parallel measurement Lower temperature setting in the MRS 120 3 than in the drying oven technique e The result achieved with the MRS 120 3 does not match the reference Repeat the measurement with a changed temperature setting Vary the switch off criterion e Adapting with the calibration curve or factor 5 2 Sample preparation Prepare one sample at a time for measurement This prevents the sample exchanging moisture with the ambient surroundings If a number of samples have to be taken simultaneously they should be packed in air tight containers so as to ensure that they do not change while they are in storage Distribute the sample evenly and thinly on the weighing pan in order to achieve reproducible results If it is applied unevenly this causes an inhomogeneous distribution of heat in the sample being dried resulting in incomplete drying or an extension to the measuring time If the sample is piled up it heats up with greater intensity in the upper layers causing combustion or encrustation to occur The high layer thickness or possible formation of a crust prevents the moisture from escaping from the sample This residual moisture means that measurement results achieved this way are not verifiable and reproducible e Distribute powder samples evenly on the
41. ormance of the wood and the heat value The water evaporates during drying When wood is stored in the open air it reaches the so called air dried status A D of 15 to 20 water content The moisture is completely removed from the wood by heating the wood to temperatures over 100 C This condition is called absolutely dry abs dry The wood moisture is the amount of water contained in the wood expressed in terms of the percentage of the mass of the water free wood and is calculated from the difference between the fresh weight MW and the dry weight DW 111 MRS BA defsi 0410 4 5 5 Print rate e PRINT RATE PRINT RATE 1 0 MIN Print rate interval The interval at which interim results are printed is set at PRINT RATE The print interval can be set in 0 1 min increments from 0 1 10 0 min 4 5 6 Standby temperature STANDBY TEMP STANDBY TEMP ON OFF Switch standby temperature on off EMPERATURE 40 Temperature value only if the standby temperature is switched on Adjusts the temperature in the sample chamber to the set temperature provided the sample chamber is closed The temperature range available is 30 C 100 C A flashing circle in the display indicates the stanby temperature is not reached yet 4 5 7 Autostart e AUTOSTART AUTOSTART ON OFF If autostart is switched on the measurement is started as soon as the sample chamber is closed This is provided that the moisture
42. ormat supported by the PC The individual measurements are separated by a tab The elements set in SET are printed out e interval at which interim results are printed is set at PRINT RATE The print interval can be set in 0 1 min increments from 0 1 10 0 min Analphanumerical ID can be entered for the operator at OPERATOR ttt When peripheral instrument e g a printer is connected the instrument interface must be configured in the SET INTERFACE submenu MRS BA defsi 0410 98 Example of a report printout with all the available selection options pm KERN MRS 120377777 Report title only output in printer mode Date 07 10 2002 Time 11 06 01 Date and time if this is switched on Name EMI 12058 Balance ID if this is switched Software N50 0040 Serialno 3300 1 Mpinga Boost 100C Method ID if this is switched on Number 2 Measurement series counter if this is switched on Bogat Dryer setup if this is switched on Temperature 100 Stop time 10 0 Min Autostop 2 20 D s Standby temp 40 C Original weight 2 186 g Starting weight is always output Mode Temp Time 100 0 The measurement is printed in the unit set B 105C 10Min 86 81 for drying provided the print rate function 140C 20Min 68 08 is switched on B 140C 30Min 51 97 102C 40Min 44 05 individual values separated by 98
43. ort All the parts must be attached together without exerting undue force Do not apply any force If you have any problems the KERN customer service will be happy to help 3 4 Choosing a suitable location In order to ensure that the moisture analyzer functions properly select a location that fulfils the following criteria Permissible ambient temperatures Temperature 5 40 Relative humidity 2596 8596 non condensing e Put the instrument on a rigid firm horizontal base preferably exposed to no vibrations sure that the instrument cannot be shaken or knocked over e Do not expose it to direct sunlight e Avoid drafts and excessive temperature fluctuations e Leave enough clear space around the instrument to prevent a build up of heat Do not expose the instrument to high levels of moisture for long periods of time Avoid letting condensation form on the instrument If instruments are cold let them warm up to room temperature approx 20 C before connecting them to the mains Condensation is practically impossible on instruments which are connected to the mains 85 MRS BA defsi 0410 3 5 Connecting it to the mains Follow safety instructions when connecting the instrument to the mains DANGER The instrument may only be operated using the original mains cord supplied If the mains cord supplied is not long enough only use an extension cord fitted with a protective earth conductor Pl
44. ration Mode external Defined weight 0 0000 g Balance calibration settings Temp cal off Temperature calibration settings Interface Baudrate 9600 Parity 7 even 1stop Handshake Hardware Interface settings Data protection off Security settings heft protection off Key tone on Key settings e Printing the application settings Keep PRINT pressed until PRINT APPLICATIONS is displayed Release PRINT The application settings and all the settings for the methods currently saved are printed 115 MRS BA defsi 0410 Applications Printout of the application settings and methods Dryer setup E Current drying parameter settings Temperature 105C Timer stop off Time 10 0 min Auto stop 2 20 D s Free 1 20 D s Autostart off Standby Temp off Temperature 40 Unit 100 0 Targe weight Current starting weight settings Weight check off Nominal 5 000 g Upper limit 6 000 g Lower limit 4 000 g Method TEST Soft Settings for the first method Dryer setup Heat mode Soft Temperature 100 Timer stop on 25 0 Auto stop Free 1 20 D s Autostart off Standby Temp on Temperature 40C Unit 100 096 Weight check off Nominal 6 000 g Upper limit 7 000 g Lower limit 5 500 g Boost Settings for the second method Seed all the methods saved are printed Temperature
45. ructions are highlighted visually at the description of what to do DANGER Warning of a possible danger which may lead to death or to serious injury CAUTION Warning of a possible danger which may lead to minor injury or damage NOTE Tips and important rules on how to use the MRS 120 3 moisture analyzer correctly 2 2 Safety instructions e When using the instrument in surroundings with increased safety requirements pay careful attention to the appropriate regulations e Only use an extension cord with a protective earth conductor e lf the mains cord is damaged disconnect the instrument from the electrical supply immediately and replace the mains cord e lf there is any reason to believe that it is no longer possible to operate the MRS 120 3 safely unplug the instrument immediately from the electrical supply and secure it so that it cannot be operated inadvertently e When carrying out maintenance work it is essential to heed the tips cap 7 1 Maintenance and servicing e The Operating Instructions must be read by everyone who has to operate the instrument and must be kept handy on site at all times MRS BA defsi 0410 80 DANGER Do not place any flammable materials on under or beside the instrument Leave enough clear space around the instrument to prevent a build up of heat The MRS 120 3 may not be used to analyze explosive highly flammable samples Do not operate the MRS 120 3 moisture a
46. s 5 4 Application table recommendations Preparation of the standard sample Distribute the sample evenly on the aluminium tray Reduce the sample to small pieces and distribute evenly on the aluminium tray Preparation of special samples A glass fibre filter can be used if the test material is sensitive or difficult to distribute e g mercury Apply the sample evenly to the glass fibre filter and cover with a second glass fibre filter The glass fibre filter can also be used for protection against material splashes every splash adulterates the final result 125 MRS BA defsi 0410 Weight of test item 9 temperature humidity or solid body Standard divergence Drying time min el Moistapple 58 10 75 Bwer 25 138 163 oi LUC Groundcoffee 23 10 28 4 Comfaks 24 120 97 57 Yogurt 23 10 865 4565 mm ee LM MT cream Criss 34 16 69 75 Mayonnaise 12 18 565 04 10 Bn I RT powder Sunflower oil rar f 45 138 119 UNE Cement 812 138 01 reaper f ea tos 11 12 130 80 9 m D 5
47. scheme Standard duplex connection RJ 45 025 09 Peripheral instrument RS 232 out 2 SS 3 2 52321 E 4 2 3 RS 232 out reb e Standard duplex connection with additional hardware handshake in the peripheral instrument MRS 120 3 RJ 45 025 09 Peripheral instrument RS 232 out 2 3 2 RS 232 in RS 232 in 6 lt 213 HS 232 out CTS DTR MRS BA defsi 0410 128 Pin configuration of the RJ45 socket MRS 120 3 RJ45 Remark c 11 Notconneced RS 232 out 2 ets 3 in vaay STSETST LIN GND 5 RS 232 in ns V24 DTR 7 Out v24 EXTBUS 8 logic 6 2 Remote control commands Acknowledge 0 off n 1 on Start calibration only if EXT is selected CAL Reset weight display D Deserve weight display ight aligned __ mE Reset info display Describe info display Reset instrument Switch off instrument Switch on instrument Enter anti theft code PDT Printdateandtime __ 0 a Start printing Press PRINT key Start print status ttt t Set print mode 0 Individually print each valu unstable 1 Individually print a stable value stable 2 Print after change of load 3 Print after each integration period 4 Print with time basis in s ttt t et d ate and time German Tag Monat Jahr nde Minute Sekunde 129 MRS BA defsi 04
48. si 0410 4 5 2 1 Saving a method STORE METHOD STORE METHOD Save a method Procedure for saving a method Set the drying parameters and the starting weight for the required method and enter a name for the method see chapter 4 5 2 Methods Activate the application menu by pressing the MENU key briefly E e Keep pressing A until e STORE METHOD appears Press If the method can be saved you exit the menu automatically and the dryer switches back to weighing mode The method cannot be saved if the name has already been used for an existing method in the memory e REPLACE METHOD YES NO appears e Using the A key select YES if you wish to replace the existing method or if you wish to enter a different name for the new method REPLACE METHOD e Press A The method is saved The dryer Of switches to weighing mode REPLACE METHOD fe The name of the method must be changed MRS BA defsi 0410 108 Method EST e Enter the new name for the method using the 4 A A and A keys Press amp 3 gt The method is saved The dryer switches to weighing mode If all 5 memory slots are occupied you won t be able to save a new method In other words you will have to delete one of the old methods first 4 5 2 2 Loading a method RECALL METHOD RECALL METHOD in Select a method Only the existing methods are displayed
49. the definition of the switch off criteria for the measurement One firmly and 2 freely definable stop mode are availlable There is also the automatic stop mode ADAPTSTOP Digit Time selectable Prozent Time selectable ADAPTSTOP e STOPMODE AUTOSTOP OFF Digit Time Percent Time ADAPTSTOP Switch off criterion Digit per time The drying procedure is switched off as soon as the reduction in weight during the time set is smaller than the number of digits set The reduction in weight must have been greater than the switch off criterion at some point In the freely definable mode the user can set from 1 99 digits in 1 digit increments and from 10 90 seconds in 10 second increments Switch off criterion percent per time The drying procedure is switched off as soon as the reduction in weight during the percent set is smaller than the number of digits set The reduction in weight must have been greater than the switch off criterion at some point In the freely definable mode the user can set from 1 99 digits in 1 digit increments and from 10 90 seconds in 10 second increments MRS BA defsi 0410 124 m Digil AUTO STOP 2 20 AUTO STOP 2 60 One digit is the smallest change in measurement that can be displayed by the moisture analyzer In the MRS 120 3 1 digit 1 mg ADAPTSTOP Is a fully automatic stop mode which determines the switch off time on the basis of the drying progres
50. the factory is 7914 This password is the same for all KERN instruments and is always valid at the same time as a password selected by the operator Keep a record of your own password PASS WORD PASSWORD DATA PROTECTION OFF No protection DATA PROTECTION MED The configuration menu 15 protected DATA PROTECTION HIGH The configuration and application menus as well as the drying para meters are protected PASSWORD ____ Enter a new password MRS BA defsi 0410 102 Procedure for activating the password protection PASSWORD ____ PASSWORD 000 PASSWORD 000 e PASSWORD6 00 DATA PROTECTION OFF DATA PROTECTION DATA PROTECTION MED 5 Activate the configuration menu Keep pressing A until PASSWORD appears Press MM The first digit in the password starts flashing Keep pressing 4 until the first digit in the password is correct Press 44 second digit in the password display starts flashing now Keep pressing A until the second digit in the password is correct Repeat these steps for the other two digits Once you have entered all four digits press a3 Press 43 The current data protection status DATA PROTECTION OFF DATA PROTECTION MED OR DATA PROTECTION HIGH is now displayed Press The display flashes Keep pressing A to change the password status Press A to save the entry MRS BA
51. tics test to check the main functions After completion of the start up process which takes about ten seconds Zero appears in the display this means that the instrument is now ready for operation During the first measurement the instrument uses the drying parameters set in the factory 2 Open the hood of the instrument Place the sample holder with an empty weighing pan onto the weighing pan holder Note The weighing pan must sit flat on the weighing pan holder Always work with the sample holder it allows you to work safely and prevents possible burning ones self Press the TARE key The instrument is ready to weigh the sample 89 MRS BA defsi 0410 MRS BA defsi 0410 Pour approx 1 0 g of water into the weighing pan Close the hood The instrument is prepared for the first measurement Start the measurement by pressing the START STOP key The heating element heats up to 105 and the fan starts to cool The dryer display is divided into the measurement display and the info line 90 93 27 The result appears in the measurement display in the unit of measurement set e The info line displays the heating mode used standard the current temperature 105 C and the current duration of the measurement 2 3 min If the temperature is under 40 three dashes are displayed Once the drying has ended audio signal sounds and the
52. ug the mains cord into a socket which has been installed in accordance with regulations and is fitted with a PE terminal For technical reasons the heating unit is designed in the factory to accommodate a voltage of 230 V or 115 V and in accordance with your order Check that the setting matches the local setting MRS BA defsi 0410 86 3 6 Safety measures The safety class 1 instrument the MRS 120 3 may only be plugged into a socket which has been installed in accordance with regulations and is fitted with a protective earth terminal The safety effect may not be undone by using an extension lead without an earth wire If the voltage is coming from mains supplies without a protective earth terminal arrange for an electrician to create a comparable level of protection in accordance with valid installation regulations 3 7 Levelling In order to function properly the MRS 120 3 moisture analyzer must be precisely horizontal The instrument is fitted with a levelling bubble and two rotatable feet for level control with the aid of which it is possible to compensate for small height differences and or unevennesses in the surface on which the instrument is standing The two screw feet must be adjusted so that the air bubble is precisely in the center of the sight glass of the levelling bubble Incorrect Correct The instrument must be carefully relevelled each time it is moved in order to obtain accurate measurements 8
53. uration menu 4 4 2 Language function e LANGUAGE SPRACHE DEUTSCH Selecting a language LANGUAGE ENGLISH LANGUE FRAN AISE Procedure for changing the language Activate the configuration menu SPRACHE DEUTSCH f you press 4d the language currently activated is displayed or LANGUE FRAN AISE or LANGUAGE If you press 6 LANGUAGE ENGLISH The language flashes now e Keep pressing A until the language you require appears SPRACHE DEUTSCH Press A to confirm the choice of language Press esc to exit the menu 7 MRS BA defsi 0410 co 4 4 3 Configuring the report printout The report printout can be configured in the SET DATA PRINT menu option The options marked ON are contained in the report and are printed The MODE PC function allows the measurement printout to be output in a format which the PC can support This format only affects the print rate printout and is used for the graphical evaluation of the drying process with the aid of a computer program such as Excel The individual measurements are output separated by tabs allowing them to be imported easily into a table SET PRINTFORMAT DATE AND TIME ON OFF BALANCE ID ON OFF METHOD ID ON OFF COUNTER ON OFF DRYER SETUP ON OFF PRINT RATE ON OFF OPERATOR ID ON OFF PRINT RATE 1 0 MIN OPERATOR ttt Printout in text format 40 characters MODE PRINTER MODE PC Print rate printout in a f
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