Service Manual
Contents
1. If the weighing platform has only 1 load cell the off center load is not adjusted in case of error The load cell must be replaced The off center load is adjusted only in weighing platforms that have 4 load cells Mechanical asymmetries can result in off center loading errors that exceed permissible tolerance limits Such errors must be compensated by soldering resistors to the PCB in the junction box The 4 solder bridges for the resistors are short circuited at the factory see the illustration on the left note the 4 solder bridges and the sequence of the load cells i Sartorius V Note The off center load is adjusted only in weighing platforms that have 4 load cells Mechanical asymmetries can result in off center loading errors that exceed permissible tolerance limits Such errors must be compensated by soldering resistors to the PCB in the junction box To minimize the off center loading error use the load cell with the lowest readout value as a reference Then adjust the other load cells to this value by adding resistors Determining the Resistance for Adjustment of the Off center Load Determining Resistance Values gt Place the test weight on each load cell in turn and write down each displayed value gt Using the lowest displayed value as the basis calculated the resistance values for the other load cells in accordance with the following equation Equation R R 0 x G D G T R required resist2. be replaced on a platform with only one load cell open the Miras indicator and disconnect the cable from the terminal strip of the A D converter Unscrew the cable gland the cable or load cell can now be replaced pd id raf Remove the isolation and connect the new cable i sartorius mechatranics gt Expose approx 6 cm 2 4 in of the wires 3 in the cable gt Remove the isolation from approx 1 cm 0 5 in of the wires and affix ferrules to the wire ends gt Thread the cable through the cable gland gt The shielding 1 must have contact with the clamps 2 Connection to ground via the shield gt After replacing the cable or load cell use a torque wrench to tighten the cable gland to 5 Nm V Note On stainless steel models the IP67 protection must be checked after closing the junction box If an off center load error is detected platforms with one load cell or if the output signal from the load cell is too high or too low replace the load cell Because the mechanical construction of the platforms is basically uncomplicated no detailed description of the disassembly procedure is included here Important To replace a load cell in a platform with four load cells use two eye bolts 010238 in two corners and then lift the weighing platform Remove the plastic caps from the bore holes before inserting the eye bolts The eye bolts can be ordered under spare part number 010238 gt W
3. on or HE sartorius off gt Off Mode Scale is in standby mode but there is no display visible no backlight no symbols no display gt On Mode Scale is in operation and the display shows the function which is in use In this mode power auto off function is invalid When system runs on batteries and the On Off switch turns the system on or off gt Off Mode Scale is totally off gt On Mode Scale is in operation and the display shows the function which is in use Back light works based on setup menu In this mode power auto off function is valid After 5 10 15 minutes system goes off when not in use according to the setup menu 2 Zero Arrow Left ZERO LEFT gt Weighing Mode Set scale zero gt Parameter Mode Shift set position of digit to the Left 3 Tare Arrow Right TARE RIGHT gt Weighing Mode Set scale Tare gt Parameter Mode Shift set position of digit to the Right 4 Gross Net Arrow Down G N DOWN Weighing Mode Toggle Weight Unit Gross amp Net Counting Mode Toggle Weight Unit Gross Net amp Pcs Function Mode To scroll Down menu selection Parameter Mode Decrement digit V V V V 5 Function Arrow Up Fn UP gt Weighing Mode Switch the scale from Normal Weight mode to Application Setup mode gt Function Mode To scroll Up menu selection gt Parameter Mode Increment digit 6 Print Enter PRIN T EN TER gt Weighing Mode Print key gt Function mo
4. Sartorius Miras Scale Service M anual SARTORIUS Miras Scale Service M anual Sartorius Miras Series Models IW2P1 IW2P4 For Complete Miras Scales Model IIP2 For Miras Indicator And Models APP IAPP4 For Miras Weighing Platforms Including Service Specifications VERSION 1 0 2007 5 HE sartorius Content I STN saa Esi ss Za r a a a ance ae a ni a ia D a a a a 9291 2000 2 0172151112 V siai bi i iii i i i i si ij i k i i EGEAS EEE 3 General BORA G ELO I i iii i ii iii ii i i i i RANO ARRA 3 501 IES OECD E iii iai iii i iii ii ii i E 3 Tango langt LO T asi i io ii i i i i i in a ni 3 Description of the EQUIPIMENL cscsssssessessssssssssssssssssssssesssssessessessessessseseaseensetsensestersessesseesseseseeeseens 4 General View of the Miras SCONES ski si insosiiini is sis ii ai a ii i i iii 4 Jale Le OF A tannsi vents i ij i ii i i i a T 5 The SSE IG HLDS IDE LO IS siai aa sin asai si i i ii ontts 5 Repairing the Miras Indicator esessesessssssssssessessessessssesssssessessessssseessesessesnsestessessessessessetsssneaeesstens 7 VAN ACO easier i i i i ki i i ii i i i 7 7 R pl cing tne Front Panel iais ii i i i i i ananasais 7 Battery Powered Operation c csssssssssssssssssssessssssssssssssssssssssssessesssssessessessasesssssesessessessesseses 8 BSK DIEDI ty AR V ii i a i E E 8 Replacing the Power CDI setas siai i i ii i i i i i i aa 9 Replacing tne Power PCB iii iii i i i ij k i i i 0 Replacin
5. ance in ohms R 0 Initial resistance in the load cell being adjusted in ohms if not specified in the specification sheet measured between Signal OUT POS positive measuring voltage and Signal OUT NEG negative measuring voltage G D Difference between lowest off center loading error from reference load cell and the off center load value displayed for the weigh cell in kg G T Test weight applied in kg gt Solder the required resistor into the bridge of the load cell being adjusted gt Then perform calibration adjustment again Sample Calculation Based on Diagram 1 Initial resistance in the load cell 350 ohms gt Test weight 500 kg gt Readout for reference load cell 498 kg load cell with the lowest readout value gt Readout for load cell being adjusted 501 1 kg gt G D 3 1 kg R R 0 x G D G T R 350 ohms x 3 1 kg 500 kg R 2 17 ohms In this example note that the test weight 500 kg is also distributed over the other load cells which means that the weight on the load cell being tested is 14 SARTORIUS Miras Scale somewhat lighter To compensate for this effect always use the next higher resistor value R 2 17 ohms resistor to be installed see page 42 Selecting the Adjustment Resistor Adjusting Off center Load with 350 Ohms Initial Resistance Adjustment Test weight Test weight Test weight Test weight resistor 100kg 200kg 500kg 1000kg in ohm Off ce
6. ation Service Concept A prerequisite for performing maintenance and repair work on Sartorius Miras scales requires considerable experience with both indicators and weighing platforms In case of defects repairs are performed on site Generally the equipment is not replaced gt Do not connect or disconnect cables to or from the equipment always disconnect the power cable from the wall socket mains supply first Information To ensure safety an isolating transformer must be installed between the indicator and the power supply before performing work that entails opening the Miras indicator housing On complete Miras scales check and adjust as necessary gt Repeatability standard deviation gt Off center load gt Span gt Linearity The procedure is the same as for all scale and weighing platform models Overview of the Models The hardware configuration consists of a Miras indicator and Sartorius weighing platform s or a Miras indicator and weighing platform s strain gauge load cells from another manufacturer Mechanical and electrical service or repair work on the complete Miras scale requires considerable experience and for this reason should be performed only by Sartorius technicians trained at the factory Any attempt to perform repair work can result in damage to the equipment Auxiliary Service Tools and Equipment In addition to standard tools you will need the following special tools to work on th
7. blank dark disconnect the equipment from mains open the housing and disconnect all cables and wires from the subassemblies Then connect the equipment to power again through an isolating transformer and connect all subassemblies again measuring the supply voltage in each case gt The voltage at the power supply output connector A see page 8 is 12V 0 3 V direct current SARTORIUS Miras Scale Replacing the Power Cable gt Disconnect the cable from the power source gt Open the housing gt Replace the cable Q Note After replacing the power cable use a torque wrench to tighten the cable gland to 3 Nm Replacing the Power PCB gt Disconnect the cable from the power Source gt Pry the shield cap from the power PCB To do this remove the two screws as shown in the illustration on the left gt Remove the protective cap and disconnect the three wires blue brown green gt Unplug connector A remove the 3 screws and replace the power supply After replacing the PCB make sure to return the shield cap to its original position HE Sartorius mechatranics Replacing the Main PCB R Ob OB OM OR OR OR R oN 33 gt Before replacing the main PCB try to read out the Ta S a n data from the main PCB controller using the service Mr eet software if this is successful you can load the adjustment data in the controller of the new main PCB once It is installed In many cases this precl
8. d ure Remove the Linezrisation Weight Lincarisation Complete or instruction ON OFF ZERO LEFT TARE RIGHT gt 2 Sec Fn UP or G N DOWN Repeatedly PRINT ENTER ON OFF ZERO LEFT TARE RIGHT gt 2 Sec Fn UP or G N DOWN Repeatedly PRINT ENTER Displ i EI i IT il J lz i rir E k i E LI K i Ti J le LI Pro LEU kr wind t L i fit tl J I SARTORIUS Miras Scale Note the calibration weight is the entire weighing And the metrical Linearization weight be required less than the calibration weight Setting the Overload Stops 1 Weighing Platforms with One Load Cell Steel Platform nominal Test weight for Test weight for capacity in kg middle stops in kg corner stops in kg 3 20 3 10 6 20 6 10 6 15 20 15 10 30 20 30 10 60 20 60 10 150 2096 150 1096 300 20 300 10 2 Weighing Platforms with Four Load Cells Steel Platform nominal Test weight for Test weight for Nominal load cell Capacity in kg middle stops in kg Capacity in corner stop measurement path in kg mm in kg a T o 05 MP58T 91k9 a e o 05 MP58T 91K9 _ 600 aso oo 05 MP58T 91k9 Repairing the Weighing Platforms Replacing the Connecting Cable If the connecting cable from junction box to Miras indicator needs to be replaced on a weighing platform with four load cells or if the load cell needs to
9. de To scroll Level up in menu Mode Confirm menu selected SARTORIUS Miras Scale Repairing the Miras Indicator Indicator Important gt To open the Miras indicator remove the six nuts as shown in the illustration on the left V Note After completing maintenance or repair work check the seal between the front panel and the housing body for damage and replace if necessary If the Miras indicator in question has an IP65 like protection rating a special test procedure is used to check the IP65 like protection after the housing has been closed Replacing the Front Panel gt In the case of a defective key keypad overlay or display the entire front panel must be replaced gt If the indicator housing seal cord Is defective it must be replaced When installing a new seal code make sure it rests entirely within the housing and is not caught between the upper and lower housing parts when you close the indicator Seal code Hi sartorius Battery Powered Operation THL 2 a a TE If the user intended to use battery operation gt Open the battery cover at the back of the Indicator gt Insert 6 pieces 1 5 V D size dry cell into the battery compartment gt In case battery sign is appeared on the display It means the battery power is weak You are required to replace new batteries Blank Display If the display is
10. e complete Miras scale Qty Designation 1 Socket wrench double hexagon 10 32 mm square driver 1 2 1 Torque wrench 10 120 Nm 14x18 stainless steel 1 Set of open ended wrenches with sockets 1 Set of screwdrivers slotted 1 Set of Allen wrenches Description of the Equipment The complete Miras scales from Sartorius are primarily used in industry Because there are a number of hardware configurations to choose from Miras models are constructed according to customer requirements General View of the Miras scales The complete M iras scale consists of gt A choice of weighing platforms with capacities from 3 kg to 3000 kg in steel and indicators Name Plate Housing Power Cable Indicator Holder Indicator Pole Pole Support foot Bubble Leveling feet 9 Stainless Cover Pan 10 Power Plug 11 Cable gland cover 12 for Load Cell e oS ae es gt E a SARTORIUS Miras Scale Indicator The Miras indicators consist of gt Front panel with keypad and digital display sartorius Main PCB Power PCB Battery Powered gt Miras indicators are equipped with either cable glands Q Note Additional electronic subassemblies are option The Key Function Definitions sartorius 1 On Off on off function will depend on different power supply condition Needs setup menu for Back light control and for Auto power off When System is connected to mains and the On Off switch turns the system
11. g the Main POB tsaasas as siaiiaa iai ania ss i i a a 10 Adjusting the Weighing PlatfOrM ccsssssssssesssessessssssssssessssessssssssssseesssstesssssesseesessessetssseeeeneess 11 TUN UON BOX iii iii i i ii a i iii ia i a is 11 Pin Assignments in the Junction BOX sss sssssssrrensnsnrrnnnnnnnrnnennnnrnnnnnnnrrnnnnnnnrrnnnnnnrrrennnnens 12 Procedure for Off center Load AdjustMent esesssessessssssssssessssssssssssesssssssessessessesseseens 13 Adjusting the Off center Load sessssssssssssssssssssssssesssssssssssssssssessessessessesseseessssessesessessereasee 13 Determining the Resistance for Adjustment of the Off center Load sessen 14 Determining Resistance ValU S 55 9 98999990999990999999999999999999999 14 Sample Calculation Based on Diagram 1 J 14 Selecting the Adjustment ReSISTOT ssssssssssrrnnunssrrnnnnnnnrnnnnnnnrnnnunnnnnnnnnnnnrnnnnnnnrrnnnnnnrrnnens 15 AHU MO LINE ENE CY iii a iii i E i i 16 Setting the Overload StOPS saitais iii i ii iii i is i i i i n ns 17 Repairing the Weighing PIatfOrMS 2259596025 0995999999999999999999999999999909999 n 17 Replacing the Connecting Cable i i 17 Replacing Load CES asai iii iii i i i ii i i ii i si 18 Replacing the Load Cell FOOL ss aninserasausteacanannssvessananesssisasaisannsvnnspnitasedusininivintunitnsudimadussasasivionn 19 EE OQ R es is ii e i i a i i a a ALE PEACE 20 SARTORIUS Miras Scale Overview General Inform
12. he Terminal comprises Load cell 1 Load cell 2 Load cell 3 Load cell 4 and Indicator The Loadcell 1 Loadcell 2 Loadcell 3 Loadcell 4 are connect to the four cell and the indicator is connect to the A D converter and the indicator o se sense Blue P supply Black blad Ser tsense row Yellow Pr supply Red Red Connections in the Junction Box for the A D Converter aroe Ame EMA 665000 E ALT E ve supply Red Re oo SARTORIUS Miras Scale Q Note The color coding of the connecting cable A D converter indicator to junction box might be different when connecting a non Sartorius platform to the Miras indicator Procedure for Off center Load Adjustment Proceed as follows to adjust the off center load using the junction box gt Stand the weighing platform with 4 load cells on its side and secure it in this position gt Remove the four screws S from the junction box gt Pull approximately 20 to 30 cm of the load cell cables out of the platform see arrow gt Return the weighing platform to the horizontal and position it next to the junction Dox gt The junction box is now accessible for adjustment of the resistors gt At the conclusion of off center load adjustment follow the instructions above in reverse order to reassemble the weighing platform Important Make sure to push the cables back into the weighing platform Adjusting the Off center Load
13. hen reassembling the weighing platform make sure to replace any plates that were under the platform frame gt Tighten the load cells with the required torque SARTORIUS Miras Scale Torque Values Load cell Torque value Load cell Torque value roc c3 30kg 10 FE C3 250q 25 caso 10 ece soua s ED C3 7 GF C3 250kg ease u 22 TE T ec 1500K8 100 gt After replacing load cells you need to check the overload stops and adjust them if necessary see page 15 16 Replacing the Load Cell Foot gt To replace a load cell foot use a screwdriver to pry the retainer spring free and push it out or loosen the nut and remove the screw see arrow in the lower illustration on the left Load cell color code Terminal assignment For Load Cell 4wirestype Red Green White black Gwirestype Red Blue Green White Brown Yellow Black sartorius ics Error Codes Error codes are shown on the main display Err codes are shown continuously Inf messages are shown for 2 seconds after which the program returns automatically to the weighing mode Nothing appears or some gt No power available symbols exist desultorily on the gt The AC adapter is not display plugged in gt Battery is drained gt LCD cable is loose gt Check the power supply gt Plug in the AC adapter gt Replace battery chargeable battery or using external charger gt Plug in
14. nter in kg centering TT fo 000005 ooo T 00 03 S Selecting the Adjustment Resistor Diagram 1 Adjusting Off center Load with 350 Ohms Initial Resistance 20 kg 50 kg 100 kg 200 kg Adjustment resistor in ohms N o x Off center in kg SH Sartorius mechatronics Adjusting the Linearity Proceed as follows to adjusting the Linearity Calibration Mode Menu Calibrate Linearity the Scale Ste A Switch on the scale 16 fero the scale Select Calibration Linearisation Mode Select Calibration Confirm Start Calibration After the zero point is stored the required calibration weight showed on the display Place the required weight on the scale If the weight is applied within the defined time limit and tolerance the weight will be accepted and the display shows the actual weight value and comes back to mode of operation selected previously Switch on the scale Zero the scale Select Calibration Linearisation Mode Select Linearisation Confirm Start Linearisation After the zero point is stored the required Linearisation weight showed on the display Place the required weight on the scale If the weight is applied within the defined time limit and tolerance the weight will be accepted and the display shows the second Linearsation weight point Place the required weight on the scale If the weight is accepted the Lincarisation is complete and comes out of the proce
15. tched on without the on the balance scale and calibrate weighing pan in place press ON OFF The weight readout is gt Thebalance scalewasnot gt Calibrate adjusted the obviously wrong calibrated adjusted before balance scale weighing gt Zero the balance scale gt Balance scale not zeroed 21
16. the cable again or contact with Miras customer service gt Theload exceeds the gt Unload the balance scale balance scale capacity gt Weighing pan is not in place gt Something is touching the weighing pan gt Display overflow Value cannot be shown on the display gt Calibration parameter not met e g balance scale not zeroed balance scale is loaded gt Weight is too high or there is no sample on the balance scale with application in use 20 gt Place the weighing pan on the pan gt Move the object that is touching the weighing pan Reduce the load on the balance scale Calibrate only when zero is displayed Press zero to tare the balance scale Unload the balance scale Increase the weight on thebalance scale gt Data interface for gt Contact the Miras gt APP board can t get data gt Contact the Miras gt EEPROM defective gt Contact the Miras A ae SARTORIUS Miras Scale gt Function not allowed in gt Contact the Miras scales verified for use in customer service center legal metrology command for Miras customer service center gt Zero isnot possible gt Remove some objects ae a gt Tareisnot possible when gt Zero the balance scale the gross weight is a minus value no JIP gt No platform is connected gt Connect a platform or sensor Max weighing capacity isless gt The balance scale is gt Place the weighing pan than indicated under swi
17. udes the need to adjust the weighing system Quick test of the A D Converter Pin Assignment Chart Quick test of the A D Converter Pin Assignment in the indicator No Signal designation Meaning 2 ara gt M S 1 xcitation Bridge supply voltage positive reat E 2 Sense Sense positive ae See 3 Output Measuring Voltage positive 4 Output M easuring Voltage negative 5 Sense Sense negative 6 Excitation Bridge supply voltage negative Replacing the Main PCB gt Switch off the indicator gt Press and hold the key while switching the indicator on again All segments are displayed BJ gt In case of defect replace the main PCB gt After replacing the main PCB use the FDT3 7 exe program to load the software El Q Following installation and commissioning of the new The main PCB the display backlighting should blink on and off ec EPs Ta ETITRE BRU tan POWER _ CON DRY CELL 10 SARTORIUS Miras Scale Adjusting the Weighing Platform Version with the junction box 5 Part no 7 36105 400 00 The illustration on the left shows LL frame 1000x1000 1 Load cell 1 2 Load cell 2 3 Load cell 3 4 Load cell 4 5 Junction box Junction Box 1 Cable to load cell 1 2 Cable to load cell 2 3 Cable to load cell 3 4 Cable to load cell 4 5 Connecting cable for A D Converter indicator 3 Sartorius mechatranics Pin Assignments in the J unction Box T
Download Pdf Manuals
Related Search