Service Manual
Contents
1. 1 co 266 101585 2 766 02 D 408259 ISNIVA 5 0 V 30 31 q Jonuoo q 35 MRS SH e 081 1 20020 50 TeBed 40024066 01 3992202 NZNO 00222 90297821 1D THalvaH lt gt NHLH gt hp Y 4 Hoss T 7 4n 1 ova 3 0209 ARS EDIOHO 2 a gt 1Hlodwd MRS SH e 081 1 36 202 70 50 zeBed 40024066 gt 990 6 PENT Buneteds Ano 990102 arn ash 1 990yOHYZ ___ 680900381 37 MRS SH e 081 1 3 3 2 3 3 3 3 NOOR WD O CD Assembly 330 7200 010 Parts list 330 7200 010 Quantity Reference A N N N N OI N O G a C1 C3 C2 C5 8 9 14 17 10 12 20 C13 C15 C19 C21 C22 C23 C18 C24 D1 D2 D3 D9 D13 D4 D6 D52. ze B ar uw B d BB T in u ER a S E Ge sor Ej py O A es mam i 5 EP 28 5 5 0811 3 1 4 Parts list 320 7215 020 Item Quantity Reference Type Part 1 1 U2 62256 PN 3023 005 2 1 U3 PAGASIC PN 3022 047 3 1 U7 80C52 PN 3022 054 4 1 U21 14 88 3023 001 5 1 U22 14C89 PN 3023 002 6 1 U33 HEF4066 PN 3023 003 7 1 U14 TL7705A PN 3023 006 8 1 U5 74HC157 PN 3023 008 9 1 U24 74HC240 PN 3023 009 10 2 U6 U23 74HC368 PN 3023 010 11 1 U4 74HC153 PN 3023 012 12 1 U29 DG413 PN 3030 100 13 3 U25 U32 U35 LM358 PN 3030 101 14 3 U28 U30 U31 OP177GS PN 3030 102 15 2 U17 U27 LF353 PN 3030 103 16 1 U9 LM3524 PN 3031 001 17 2 U18 U20 LM7660S PN 3031 002 18 1 U10 78L15 PN 3031 003 19 1 U11 79L15 PN 3031 004 20 1 U8 LM2575 PN 3050 200 21 1 Q6 BCP55 PN 3140 001 22 1 09 52 PN 3140 002 23 6 Q1 Q7 Q10 Q12 Q13 Q14 BC817 PN 3140 003 24 4 04 05 08 011 BC807 PN 3140 004 25 1 Q3 BSP319 PN 3140 005 26 12 D1 D7 D15 D17 D18 D19 D20 D21 D22 D24 BAW56 PN 3145 001 D26 D27 27 1 014 BAT54C PN 3145 002 28 4 D2 D3 D10 D13 LL4004G PN 3145 003 29 6 D4 D5 D8 D9 D11 D12 1N5819M PN 3145 004 30 1 U19 LM399H PN 3220 101 31 1 D6 ZPD6 2 PN 3241 962 32 1 D29 ZMM12V PN 3245 012 33 1 R100 OR PN 3306 000 34 1 R14 10R PN 3306 010 35 2 R34 R29 100R PN 3306 110 36 2 R4 R20 330R PN 3306 133 37 13 R13 R18 R19 R23 R25 R26 R30 R35 R90 1k
3. 8SEWT 2 A Z v n 51 44001 1 1 1 oe 288 lt 3 1 ruosNasl x lt 9 HOSN3S ND 81 la Edl 34058 L S1 81 moos 000 lt mS 25 MRS SH e 0811 92 80 gee 99 2 028 2002 00 00 aoueleg 0 Jnor lt OAU3S 2 lt gt ola lt MRS SH e 081 1 80 vlan AS6 ssewi d 75 1 sp 000 olen sb eb ae 1 lt at 1 33 azzn 68091 7 Og O 0230 vean 512 1512 00 ow or ano AnewwhS an AS 6 d 553 TUN ___ NASA 90 4 azn 80 m 4 5 MF 3 1 aran 3001 PNH a JO 0000 hoor mas PFE T A EMdIXS Tie E gebed 95 28 2002 60 00 A 990 0 Ag 00 SA aeen OND OND 8900101462 8314380 gt __ gt 69H Di ASE ANOL L6H 90 HHosnas1 27 MRS SH e 081 1 3 1 3 Assembly 320 7215 020 Ie r 8 HE 7 8 mem 5 A m 17 LIES 8149 rg MTH6
4. The balance must have reached its operating temperature and be in the service mode see Activation of the service mode chapter 4 10 1 Have weights of 1 2 full load and full load ready see Final check in chapter 4 10 12 Press and hold CHANGE key until LINEARITY appears on the info display then release the key With empty service weighing pan 3 4 1 2 press the function key F1 0 gt balance will flash on Place a 1 2 full load weight in the centre of the weighing pan Press the function key F2 1 2 balance will flash on 7 Place a full load weight in the centre of the weighing pan Press the function key F3 1 1 5 balance will flash on Press the function key F4 SET balance will flash on and show the value for the full load Now exit the service mode by pressing the ON OFF key Final check of the adjustment The balance must have reached its operating temperature for that assure that balance is connected at least three hours to the mains Calibrate the balance by holding TARE key till CAL EXT appears release TARE key Check the corner load see Adjusting of the corner load in chapter 4 10 4 Check the linearity with half weight and full weight Carry out any S corrections see S correction of a balance see chapter 4 10 9 MRS SH e 081 1 67 4 10 9 S correction of a balance 4 10 9 1 General notes on S correction The balance must have reached its operating
5. D16 D17 D7 D12 D11 D8 D10 D14 F1 JP2 Type Part 2200pF PN 3870 004 0 22uF PN 3422 422 1uF PN 3435 510 10uF PN 3438 610 470nF PN 3401 447 100nF PN 3419 340 10nF PN 3419 310 1N4448 PN 3230 901 1N4007 PN 3210 008 20V PN 3241 020 BAT48 PN 3210 006 8V2 PN 3241 982 1 5KE220A PN 3680 100 12V 0 5W PN 3241 012 RECTIFIERKBPC60PN 3220 010 FAB PN 3602 111 HEADER 2 PN 3602 301 MRS SH e 081 1 Item Quantity Reference 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 N 0 N W OD N a MRS SH e 0811 Type JP3 HEADER8 JP4 HEADER 7X2 JP5 PT100 LC1 LC2 LC3 LC4 LC5 ZJSR5101 332 LS1 RELAY_5A 11 B82724 J2402 L2 L3 BLO2RN2 MAINS1 GS220P Q6 Q8 Q10 BC337 Q7 IRFP460 09 BC327 R1 910k R20 R2 100R R3 R6 R22 R23R30 R47 R50 R57 R5 10k R4 R18 R16 1K R21 47k R25 R43 4k7 R26 R34 R37 R40 R42 R44 R45 R46 220k R5 R27 R28 R33 R35 R38 R39 R41 100k R29 56k 2W R31 22k R32 0 1 2W R36 330R R51 33k R53 5k6 R54 18k R55 27k 51 MSW3P U1 LM311 U4 74 4066 05 78L12 TO92 U6 LMC555 U7 4N35 U8 U9 LP324 Part PN 3502 101 PN 3502 002 PN 3504 302 PN 3680 007 PN 3604 104 PN 3680 200 PN 3680 008 PN 3602 107 PN 3100 004 PN 3130 024 PN 3100 007 PN 3304 491 PN 3304 110 PN 3304 310 PN 3304 210 PN 3304 347 PN 3304 247 PN 3304 422 PN 3
6. 1 Schematic 320 204 010 iiio pa riii Pa 32 3 2 2 Assembly 320 7204 010 33 3 2 8 Parts list B20 7204 O1 0 iiio paa tig a 34 3 3 HEATING BOARD 330 7200 010 2 2000000 00000 stnn nent 35 2 27 330 2200 010 3 aaa i Ee ey j ja 35 3 3 2 Assembly 330 7200 0 10 Mish 38 3 33 Parts list 330 7200 010 0 p isl ie 38 3 4 POWER SUPPLY BOARD 330 7201 010 40 3 47 Schematic 930 201 070 0 40 342 330 7201 010 222 524 44 22244222 re nas 41 3 4 8 Partslist 330 7201 010 nd i aaa 42 4 REPAIRS nul seien IDA Lee 43 4 1 SERVICE TOOLS AND EQUIPMENTS acacia 43 DA 43 4 1 2 Adjustment set 850 8571 iid aa 43 4 1 3 850 8537 inae it eee eate e od ps Ld E E Ee 44 4 2 DISMANTLING THE HOOD E 45 4 2 1 Replacing or cleaning the safety class 46 4 2 2 Replacing or cleaning the inspection glass nn 46 4 2 3 Replacing the radiator sisse einen tnn renean nnne tnn 46 4 24 Replacing the temperatu
7. 182 F4 183 PN 1100 054 PN 1100 208 PN 1100 211 PN 1100 213 PN 1300 051 PN 3500 022 PN 3650 008 PN 3650 009 PN 3650 010 Description Heat shield Safety glass Sensor holding plate Cover Radiator unit pre Connecting cable Radiator cable Temperature sensor Mounting clip Holder spring Screw KA30x8 Screw KA30x6 Screw M4x6 Screw M4x16 Combo nut M4 U tab 6 3mm Halogen radiator 115V Halogen radiator 230V Temp safety switch 15 2 6 Weighing cell 16 MRS SH e 081 1 Key No O OI BON gt 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 MRS SH e 081 1 Part No 300 7024 320 2004 320 2021 320 2032 320 2034 320 2041 320 2045 320 2048 320 3013 320 5019 320 7006 320 8011 320 8000 320 8010 330 7036 1100 023 1100 040 1100 169 1100 170 1100 171 1100 172 1300 008 1500 001 1500 075 280 2003 1100 039 320 3018 240 4048 320 3019 320 7035 Description Connecting wire Flexure holder Flexure strap Th 1 2mm Transport safety device Sensor mechanism plate Flexure sheet Th 3mm Flexure sheet Th 3mm Magnet cover Base round Support piece 1 4 5 Coil Sensor mechanism incl Key No 13 and 14 Sensor board Connecting board Chassis Balance arm 1 4 5 Cone extension Screw M3x6 Screw M3x8 Screw M4x6 Screw M4x8 Screw M4x10 Screw M4x12 Nut M4 Washer M3 Spring
8. PN 3306 210 R98 R99 R104 R105 38 3 R66 R68 R70 2k PN 3306 220 MRS SH e 081 1 29 Item 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 30 Quantity N a N G A ms CEO N ASD om N ND Reference R8 R87 R24 R2 R12 R15 R16 R42 R43 R72 R91 R96 R3 R5 R7 R21 R27 R36 R37 R51 R55 R57 R58 R59 R60 R61 R64 R67 R69 R73 R77 R78 R89 R97 R50 R52 R63 R88 R32 R53 R49 R11 R22 R38 R1 R31 R48 R54 R65 R71 R75 R76 R82 R9 R10 R92 R86 R6 R28 R33 RN1 RN4 RN2 RN3 C56 C67 C37 C50 C8 C16 C17 C9 C11 C15 C19 C22 C14 C21 C40 C1 C2 C77 3 13 73 C53 4 5 10 26 28 33 36 78 79 80 6 7 18 20 23 35 41 44 45 52 54 55 57 58 59 60 62 63 69 C70 C71 C72 C74 C76 C31 C32 C51 C61 C66 C68 C12 C27 C29 C38 C39 C42 C43 C46 C49 C64 55 55 51 41 53 56 2k2 3k3 4k7 10k 15k 5k6 22k 27k 33k 47k 100k 1M 4R7 100R 10k 47k 100nF 470 1u550V 330nF 220uF 35V 47uF 50V 1000uF 10uF 35V 22pF 1000 1 1 80 10nF 100nF 470nF 10uF 35V 7X2 8X2 1X2 5X2 1X2 Part PN 3306 222 PN 3306 233 PN 3306 247 PN 3306 310 PN 3306 315 PN 3306 256 PN 3306 322 PN 3306 327 PN 3306 333 PN 3306 347 PN 3306 410 PN 3306
9. washer M4 Stopper Screw M3x5 Distance bolt Symmetry screw Corner load screw Magnet 17 2 7 Internal parts Key No Part No Description 1 330 7003 Sample holder 2 330 7004 Pan support 3 330 7011 Wind shield 18 MRS SH e 081 1 2 8 Mains cable Key No O MRS SH e 081 1 Part No PN 3602 401 PN 3602 400 PN 3602 402 PN 3602 403 Description Mains cable CH Mains cable Schuko Mains cable USA Mains cable UK 19 3 Electronics 3 1 Main board320 7215 020 3 1 1 Exchange of the main board 320 7215 020 The new basic version of the main board 320 7215 020 is applicable for moisture analyzer with software 5 The drawing below shows which hardware components are to be converted by an exchange of a main board 20 m 8H BE a U12 0 013 al i Je 55908 m mes ES me n E ms 5 9 E it ED je TP1 TP4 Position Description U13 EEPROM U12 Real time clock TP1 TP4 Measuring resistor 20 MRS SH e 081 1 Schematic 320 7215 020 3 1 2 05684 2912202 2002 60 90 yun 060 0 0158 yun loug 21 MRS SH e 0811 38084 2 066 2002 60 90 gt HINI 120 E3zuespz vi 82 dno gt IO 3 lt ary
10. 2 Screw the flexure strap anchor 12 4 1 3 on tightly with 2 screws 13 4 1 3 in place of the flexure strap 54 MRS SH e 081 1 4 6 4 4 6 5 4 6 7 Removing the two flexure holders Using the two pins for flexure holder 6 4 1 3 fix the upper flexure holder 2 2 6 into the chassis Unscrew the 4 screws 22 2 6 of the upper flexure holder and remove together with the 4 spring washers 26 2 6 2 on the chassis 2 on the support piece Remove the two pins with the upper flexure holder incl 4 spring washers and the flexure sheets then take out the pins from the flexure holder Fix the lower flexure holder 2 2 6 into the chassis with the two pins for flexure holder 6 4 1 3 5 Unscrew 4 screws 22 2 6 from the lower flexure holder and remove together with the 4 spring washers 2 on the chassis 2 on the support piece Take out both pins with the lower flexure holder and remove the lower flexure holder together with the 4 spring washers and the flexure sheets Removing coil Carefully unsolder 2 connecting wires 1 2 6 from the connecting board 14 2 6 using the tweezers Unscrew 3 screws 21 2 6 from the magnet cover 8 2 6 remove the cover together with transport safety device 4 2 6 and spring washer s26 2 6 Unscrew 2 brass screws 19 2 6 from the coil 11 2 6 on the balance arm 16 2 6 using a No 2 screwdriver remove the coil together with the washer 25 2 6 Carefully take out the coil from the ma
11. 2 6 part no 320 2041 into position as in the drawing below slots are on the support piece side below 2 With centering spigot 10 centre the flexure sheet in the hole the chassis side above 3 With the second centering spigot 10 centre the flexure sheet in the slot on the support piece side below 4 Tighten the first upper centering spigot and then remove the second lower centering spigot without touching the flexure sheet in doing so 5 Fasten the flexure sheet on the support piece side with base 9 2 6 spring washer 26 2 6 and screw 23 2 6 see drawing below 6 Remove the second upper centering spigot and fasten the flexure sheet on the chassis side with base 9 2 6 spring washer 26 2 6 and screw 23 2 6 4 9 6 Assembling a new flexure strap Unscrew 2 screws 13 on the flexure strap anchor 12 and remove it 2 Bring the flexure strap 3 2 6 part no 320 2021 into position as shown in the drawing on page 63 the slot is on the support piece side 3 Using a centering spigot 10 centre the flexure strap in the hole on the balance arm side 4 With the second centering spigot 10 centre the flexure strap in the slot on the support piece side 5 Tighten the first upper centering spigot and then carefully remove the second lower centering spigot without touching the flexure strap 6 Fasten the flexure strap on the support piece side with base
12. 304 410 PN 3305 356 PN 3304 322 PN 3305 901 PN 3304 133 PN 3304 333 PN 3304 256 PN 3304 318 PN 3304 327 PN 3603 013 PN 3030 029 PN 3019 419 PN 3050 022 PN 3030 036 PN 3270 003 PN 3030 037 39 2002 11 21 8 41027066 auol HH anwso 266 101885 2 901 2 8 37 VO EIGIEO ss 266 1015 5 2 1 MRS SH e 081 1 7201 010 E Power supply board 330 Schematic 330 7201 010 3 4 3 4 1 266 1015 5 2 266 1015 5 2 191 HOLO3THSA 1001 to 240 0 289 2 8 268 1012 29 asna 101 td 40 Assembly 330 7201 010 3 4 2 Upper side Lower side 41 MRS SH e 081 1 3 4 3 Parts list 330 7201 010 Item Quantity Reference Type Par 1 5 C1 C7 C8 C9 C10 10nF PN 3419 310 2 1 C2 100nF PN 3419 340 3 2 C3 C4 1000uF 50V PN 3428 810 4 1 D1 B40C1500G PN 3220 009 5 1 F1 FUSE PN 3602 105 6 7 LC1 LC2 LC3 LC4 LC5 LC6 LC7 ZJSR5101 PN 3680 007 7 4 L1 L2 L3 L4 BLO2RN2 PN 3680 008 8 2 L5 L6 ZBF253D PN 3680 003 9 1 Q1 BC337 PN 3100 004 10 5 R1 R2 R3 R4 R5 1k PN 3304 210 11 1 R6 RXE020 PN 3350 300 12 1 SW1 230V 115VS PN 3602 104 13 1 S1 2P U MNL PN 3602 300 14 1 S2 7X2 PN 3502 002 15 1 S3 RS232 PN 3502 100 16 1 S4 FB Cable 330 7029 17 1 S5 12VDC50MA PN 3602 010 18 1 S6 PWRJACK PN 3512 012 19 1 T1 TRAFO320 PN 3606 100 42 MR
13. 510 PN 3306 947 PN 3361 110 PN 3361 310 PN 3361 347 PN 3401 410 PN 3401 447 PN 3401 515 PN 3420 433 PN 3426 722 PN 3428 648 PN 3428 810 PN 3438 610 PN 3440 022 PN 3440 110 PN 3440 210 PN 3440 218 PN 3440 310 PN 3440 410 PN 3440 447 PN 3450 610 PN 3502 002 PN 3502 003 PN 3504 302 PN 3504 310 PN 3504 360 MRS SH e 081 1 76 77 78 79 80 81 82 83 84 Quantity Reference 54 151 11 12 921 C34 D16 D23 U1 U12 U13 pO MRS SH e 081 1 Type 1X7 QMP 111P 500uH 14 7456MHz 330nF BZX84C9V1 PLCC32 72421 24C08 Part PN 3504 368 PN 3607 001 PN 3680 002 PN 3881 013 PN 3421 433 PN 3244 991 PN 3023 016 PN 3022 046 PN 3022 053 31 3 2 Display board 330 7204 010 3 2 1 Schematic 320 7204 010 8 a 4 5 5 5 8 8 32 MRS SH e 0811 3 2 2 Assembly 320 7204 010 MRS SH e 081 1 33 3 2 3 3 o 34 Parts list 320 7204 010 Guantity Reference N N S C1 DISPLAY 1 D1 Q3 Q1 Q4 Q2 R1 U1 U2 U3 U4 Type 3n3 10 LT 55GK BAW56 BCP55 BCP52 10k CD4069 5818EPF 74HC132 Part PN 3440 233 PN 3260 019 PN 3145 001 PN 3140 001 PN 3140 002 PN 3306 310 PN 3023 004 PN 3022 051 PN 3023 007 MRS SH e 081 1 Heating board 330 7200 010 3 3 Schematic 330 7200 010 3 3 1 202 0 50 0959 6 snai 266 02 07 7686 1012 201
14. 9 2 6 spring washer 26 2 6 and screw 23 2 6 see the drawing on page 63 7 Remove the second upper centering spigot and fasten the flexure strap on the balance arm side with base 9 2 6 spring washer 26 2 6 and screw 23 2 6 62 MRS SH e 081 1 4 9 7 rt 4 9 8 4 5 Dismantling the assembly jigs Unscrew and remove the two inner assembly pins 9 on the support piece Unscrew and remove the two outer assembly pins 9 on the support piece Take out the two assembly jigs 7 8 from the side If the two assembly pins 6 on the flexure holder 2 2 6 are still assembled remove them carefully Installing the weighing cell in the bottom of balance Carry out a further movement check on the balance arm the balance arm must not touch the transport safety device 4 2 6 Visual check with the lens Place the weighing cell carefully in the bottom of housing hold the weighing cell only to the chassis Tilt the bottom of housing to the side and screw the weighing cell securely from below with 3 nuts 24 2 6 Carefully connect the sensor mechanism plug 12 2 6 to the main board 8 2 1 Lay the top of balance 4 4 4 on the left beside the bottom of balance and connect the internal power supply cable 5 4 4 on the connector board IMPORTANT Tighten earth cable with cylinder head screw 8 4 4 incl washers 9 10 4 4 on the bottom of balance 6 The balance is now ready for the adjustments e
15. KERN amp Sohn GmbH Ziegelei 1 Tel 0049 0 7433 9933 0 F WAAGEN GEWICHTE BALANCES WEIGHTS D 72336 Balingen Frommern Fax 0049 0 7433 9933 149 a E Mail info kern sohn com Internet www kern sohn com Service Manual Electronic Moisture Analyzer Page 2 KERN MRS 120 3 Version 1 1 02 2008 Contents 4 1 1 TEMPERATURE CALIBRATION SET eda aaa 4 1 2 CONSUMABLES Siuet RRS RR a 5 2 4 aa raae eae 6 2 1 BOTTOM OF BALANCE ed Ga ee eae a 6 2 2 TOP OF BALANCE dor en a ed aaa TaN 8 2 3 BASE e a e S abi 10 24 HOOD HALOGEN rr ai ete te 12 2 5 HALOGEN RADIATOR UNIT alae ead 14 2 6 WEIGHING cite RAR arte A al j 16 2 7 INTERNAL ad cde 18 2 8 MAINS CABLE gidi GAR si gi 19 3 ELECTRONICS 20 3 1 MAIN 320 7215 020 20 3 1 1 Exchange of the main board 320 7215 020 20 31 320 7215 020 5 maa an s 21 3 1 3 Assembly 320 7215 020 a a aa aaia Eii a EEE 28 3 14 Parts list 320 7215 020 sun a 29 3 2 DISPLAY BOARD 330 7204 010 2 224 1 6 32 3 2
16. NTS eer de 64 4 10 1 Activation of the service mode sss eene nnne nennt 64 4 10 2 Adjusting of the symmetry as s 64 4 10 3 Checking the pre load bil P E ELM 64 4 10 4 Adjusting of the corner load sisse eene enne enn nnne 65 4 10 5 Final assembly of the 083 310 06 sss sisse enne nnns 67 4 10 6 Checking the corner load Sond De Das ae 67 4 10 7 Linearization of the balance 2221 01 0000 00000000099 either nnns 67 4 10 8 Final check of the adjustment 67 4 10 9 S correction of a balance eoe eee etr et 68 4 10 10 Temperature linearizatiON esses essent nnn nnne nnne nnns 68 4 10 11 Configuration of the heat 60 aaa 69 410 12 Finalcheckez os ett tt boe dee eee 69 41 ERROR MESSAGES ec n eod tt tienden 70 4 11 1 0889731110 897710 ott e eti d e n t cett e e e 70 4 11 2 EM 70 4 11 3 HardWAare etror ea 70 4 12 DISCUSSION WITH THE n 71 MRS SH e 081 1 3 1 Accessories 1 1 Temperature calibration set Key No Part No Description 1 MRS A01 Temperature calibration set IMPORTANT For repair of the temperature calibration set no spare parts a
17. S SH e 081 1 4 7 4 7 1 1 4 7 2 Installing the new flexure sheets Removing the old flexure sheets Take out all screws from the flexure holder and remove the old flexure sheets together with spring washers Installing the new flexure sheets Place a flexure holder on the assembly plate 1 4 1 3 as in the drawing below Place 4 new flexure sheets 7 2 6 part no 320 2045 carefully on the assembly plate as in the drawing below the slot of the sheet is always the flexure holder Place 4 spring washers 26 2 6 on the flexure sheet and screw these tightly to the flexure holder with 4 screws 20 2 6 Take the complete flexure holder carefully off the assembly plate do not touch the flexures Prepare the second flexure holder in the same way MRS SH e 081 1 57 4 8 Cleaning 4 8 1 Cleaning the magnet Cut strips of a double sided adhesive tape ca 2x2 cm Wind the adhesive tape around one end of a toothpick Introduce the toothpick adhesive tape first vertically into the annular gap With circular movements move it repeatedly around the magnet In this way any dirt particles stick to the adhesive tape If necessary repeat the procedure with a freshly prepared toothpick until the annular gap is free from impurities 6 Wipe over the top of magnet with a piece of adhesive tape mw 4 8 2 Cleaning the coil 1 Using a lint free cloth remove any contamination from the coil 2 Do not clean t
18. S SH e 0811 4 Repairs 4 1 Service tools and equipment 4 1 1 Equipment The following basic tools are required Part No Description Soldering iron Tweezers Lens Voltmeter Socket wrench Nos 4 5 5 and 7 Flat bladed screwdriver No 1 2 and 4 Phillips screwdriver Nos 0 and 2 350 8537 Tool set series 320 350 835x Power supply 350 8351 CH 350 8352 Schuko 350 8353 USA 350 8354 UK 350 8355 AUS Weight 10g 20g 50g 100g class F1 4 1 2 Adjustment set 350 8571 Position Part No Description Quantity 1 330 7038 Service membrane switches 1 2 W 41 1716 Service weighing pan 1 MRS SH e 081 1 43 4 1 3 Position ON O RON 44 Tool set 350 8537 Part No W 41 1688 W 41 1688 5 W 41 1688 6 350 6203 240 7124 PW 29 43 300 W 41 1700 W 41 1701 W 41 1677 W 41 1691 W 41 1675 W 41 1674 PN 1100 172 W 41 1699 W 41 1578 8 Description Mounting plate Support post long Support post short Line head screwdriver M4 Screwdriver small no 1 Pin for flexure holder Assembly jig with slot Assembly jig with hole Assembly pin for assembly jig Centering spigot for flexures Centering spigot for the coil Flexure strap anchor Line head screw M4x12 Alignment jig Connecting cable Quantity N N N MRS SH e 0811 4 2 Dismantling the hood The dismantling procedure required for replacing the parts listed below is explained in th
19. d corner load MRS SH e 081 1 69 4 11 Error Messages 4 111 Operating error Error disappears with correct use or application Error No Error responsibility Error repair Error 1 Invalid program Load right program Error 2 Weight too small Use higher weight Error 4 Wrong anti theft code Use right code Error 5 Wrong anti theft code Use right code Error 8 Zero point outside range Error 9 0 Calibration factor bad Repeat calibration Error 9 1 Zero point difference too high Repeat calibration Error 47 Too many values Use fewer values Error 48 Different first unit from input Use original unit Error 49 Too few values Use more values Error 53 Values out of range 50 Use appropriate weight Error 60 Fallen below minimum transformer area Error 61 Maximum transformer area exceeded 4 11 2 Fatal error Balance stays still error repair in service mode Error No Error responsibility Error repair Error 10 No linearization values Repeat linearization Error 11 No calibration factor Repeat calibration Error 22 No temperature compensation values Call service Error 26 Missing temperature linearization value in Temperature linearization moisture analyzer Error 27 Missing temperature calibration value in Temperature calibration moisture analyzer 4 11 3 Hardware error Balance stays still Error No Error responsibi
20. e balance Undo 2 socket head screws 7 4 3 from the heating board using the no 0 screwdriver and 2 socket head screws 14 4 3 from the mains socket rear panel using the no 2 screwdriver Disconnect the plug in contacts for the temperature sensor radiator power supply and fan from the heating board and remove the heating board Remove the fan 2 4 3 Replace fan and reassemble in reverse order Replacing the temperature sensor IMPORTANT Disconnect the device from the mains Open up the hood and remove loose parts such as the pan support the windshield and the protection plate 16 4 3 Undo the 2 socket head screws 15 4 3 marked T on the housing using a no 4 screwdriver and gently tip the top of the moisture analyzer 17 4 3 back Disconnect the ribbon cable 8 4 3 and power lead 9 4 3 from the heating board 1 4 3 and remove the top of the moisture analyzer from the balance MRS SH e 081 1 49 5 Undo the ground wire s hexagon nut 6 4 3 using the no 7 socket wrench from the top of the balance make sure to leave the lock washer 5 4 3 on the top of the balance 6 Undo 2 socket head screws 7 4 3 from the heating board using the no 0 screwdriver and 2 socket head screws 14 4 3 from the mains socket rear panel using the no 2 screwdriver Disconnect the plug in contacts for the temperature sensor radiator power supply and fan from the heating board and remove the heating board 8 Undo the 4 socket h
21. e following sections Safety glass 1 4 2 Inspection glass 2 4 2 Radiator 3 4 2 Temperature safety switch 4 4 2 For maintenance work the device must be disconnected from the mains Also ensure that the device cannot be reconnected to the mains by anyone else during the work 1 MRS SH e 0811 45 4 2 1 4 2 2 4 2 3 Replacing or cleaning the safety class IMPORTANT Disconnect the device from the mains Open up the hood and remove loose parts such as the pan support the windshield and the protection plate Undo the 4 socket head screws 11 4 2 on the radiator unit using a no 2 screwdriver and remove the hood 5 4 2 Undo the 2 collar screws 12 4 2 using a no 2 screwdriver and remove the heat shield 6 4 2 Slide the safety glass 1 4 2 up and out Clean or replace glass and reassemble in reverse order Note Orientation of glass narrow section to bottom see picture under section 4 2 Replacing or cleaning the inspection glass IMPORTANT Disconnect the device from the mains Open up the hood and remove loose parts such as the pan support the windshield and the protection plate Undo the 4 socket head screws 11 4 2 on the radiator unit using a no 2 screwdriver and remove the hood 5 4 2 Undo the 2 socket head screws 14 4 2 on the hood using a no 0 screwdriver and remove the two inspection glasses 2 4 2 Clean or replace glass and reassemble in reverse ord
22. ead screws 12 4 3 on the radiator unit using a no 2 screwdriver and remove the hood 11 4 3 9 Undo the 2 collar screws 19 4 3 using 2 screwdriver remove the heat shield 20 4 3 10 Slide the safety glass 21 4 3 up and out 11 Remove the harness wrap from the cable gland on the radiator unit 12 Undo socket head screw 22 4 3 using no 0 screwdriver and remove the cover 23 4 3 13 Undo 2 socket head screws 10 4 3 using a no 0 screwdriver and remove the temperature sensor 3 4 3 Note When the temperature sensor is replaced the temperature needs to be adjusted using calibration set MRS A01 Instructions see Temperature linearization in chapter 4 10 10 4 3 4 Replacing or cleaning the plunger 1 IMPORTANT Disconnect the device from the mains 2 Open up the hood and remove loose parts such as the pan support the windshield and the protection plate 16 4 3 Undo 2 socket head screws 15 4 3 using a no 4 screwdriver and tip the temperature sensor 17 4 3 back slightly 4 Disconnect the ribbon cable 8 4 3 and power lead 9 4 3 from the heating board 1 4 3 and remove the top of the moisture analyzer from the balance 9 Undo the ground wire s hexagon nut 6 4 3 using the 7 socket wrench from the top of the balance make sure to leave the lock washer 5 4 3 on the top of the balance 6 Undo 2 socket head screws 7 4 3 from the heating board using the no 0 scr
23. ece with 2 screws 21 2 6 Turn back the stopper 27 2 6 with brass screw 28 2 6 by 90 and screw tight The stopper must be free of play and lie centrally in the symmetry screw 30 2 6 if necessary re adjust symmetry screw MRS SH e 081 1 4 9 4 Assembling the flexure holders Introduce the two pins for flexure holder 6 in the first pre assembled flexure holder see Installing the new flexure sheets in chapter 4 7 2 in such a way that the shoulder of the pins is opposite the screw heads on the flexure holder Bring the two pins with the flexure holder into position in the chassis see drawing below Lower the flexure holder carefully over the two pins on the chassis until the flexure sheets just touches the chassis and the support piece Secure the flexure holder with 4 screws 22 2 6 and 4 spring washers 26 2 6 Push through the two pins to the installed flexure holder On the opposite side introduce the second pre assembled flexure holder see Installing the new flexure sheets in chapter 4 7 with the screw heads inwards over the two pins and lower onto the chassis until the flexure sheets just touches the chassis and the support piece Secure the flexure holder with 4 screws 22 2 6 and 4 spring washers 26 2 6 The two pins must be capable of being withdrawn smoothly from the flexure holder MRS SH e 081 1 61 4 9 5 Assembling new flexure sheets 1 Bring 2 flexure sheet 6
24. eds to be connected to the RS232 Interface located at the back of the moisture analyzer Put the temperature sensor of the temperature calibration set into the sample chamber 4 Press and hold the CHANGE key until the Info Display shows TEMP LINEARISATION release the key 5 Press the START STOP key 27 the temperature linearization starts now Note Within the first two minutes the room temperature will measured After that the moisture analyzer heats up to 100 The display indicates the 68 MRS SH e 081 1 4 10 11 temperature and the remaining time for the temperature linearization the time duration to heat up to 100 C is 20 minutes The moisture analyzer will now adopt the temperature from temperature calibration set Afterwards the moisture analyzer will heat up to 200 C which takes 20 minutes to reach As before the moisture analyzer will again adopt the temperature from the temperature calibration set The temperature is now linearized and the temperature calibration set can now be disconnected 7 Using the ON OFF key switch the balance off and on the service mode is now exited Configuration of the heat source The balance must be set in service mode see Activation of the service mode in chapter 4 10 1 Press and hold the CHANGE key as long as in the Info Display HEA TER CONFIG appears release the key 4 10 12 Final check Review of the final tolerances reproducibility linearity an
25. er Replacing the radiator Note The new radiator shell be touched only with a fibre free cloth or gloves soiling caused by unprotected fingers can reduce considerable life expectation of the radiator Any soiling or dirt caused can be cleaned with methylated spirit Attention by cleaning the IR radiator do not clean the gold coating side with mehtylated spirit 1 2 3 46 IMPORTANT Disconnect the device from the mains Open up the hood and remove loose parts such as the pan support the windshield and the protection plate Undo the 4 socket head screws 11 4 2 on the radiator unit using a no 2 screwdriver and remove the hood 5 4 2 Undo the 2 collar screws 12 4 2 using a no 2 screwdriver and remove the heat shield 6 4 2 Slide the safety glass 1 4 2 up and out Undo socket head screw 10 4 2 using a no 0 screwdriver and remove the cover 7 4 2 Undo 2 socket head screws 9 4 2 using a no 0 screwdriver and fold back the temperature sensor 8 4 2 and holder Undo socket head screw 15 4 2 and remove securing clip Disconnect the radiator s 2 plug in contacts from connectors on topside of unit Grasp radiator at top and pull slightly forward while gently spreading retaining clip Pull radiator 3 4 2 out gently Replace radiator and reassemble in reverse order MRS SH e 081 1 4 2 4 Replacing the temperature safety switch IMPROTANT Disconnect the device from the mains 2 Open up t
26. ewdriver and 2 socket head screws 14 4 3 from the mains socket rear panel use the no 2 screwdriver 7 Disconnect the plug in contacts for the temperature sensor radiator power supply and fan from the heating board and remove the heating board 8 Take off the lock washer 13 4 3 and remove the plunger 4 4 3 and spring 18 4 3 9 Clean or replace plunger and reassemble reverse order 50 MRS SH e 081 1 4 4 Dismantling the top of balance The dismantling procedure required for replacing or repairing the parts listed below is explained in the following section Main board 14 4 4 Power supply 13 4 4 Weighing cell 2 6 Display board 7 4 4 For maintenance work the device must be disconnected from the mains Also ensure that the device cannot be reconnected to the mains by anyone else during the work MRS SH e 081 1 51 4 4 1 General procedure for opening the balance 1 IMPORTANT Disconnect the device from the mains 2 Open up the hood and remove loose parts such as the pan support the windshield and the protection plate 1 4 4 3 Undo 2 socket head screws 2 4 4 marked B on the housing and rear case securing screw 3 4 4 using a no 4 screwdriver CAUTION Take care not to damage the sensitive weighing cell during the following stages of the procedure 4 Raise the top of the balance 4 4 4 slightly disconnect the ribbon cable 6 4 4 from the power supply board The connector between t
27. gnet 32 2 6 Removing the support piece Unscrew 2 screws 21 2 6 on the inner cone 17 2 6 and remove inner cone Unscrew upper screw balance arm side of the flexure strap anchor 12 4 1 3 and pull off the support piece together with the flexure strap anchor over the assembly pins 9 4 1 3 Removing the balance arm Unscrew brass screw 28 2 6 from the stopper 27 2 6 turn the stopper inwards ca 90 and gently re tighten the brass screw Unscrew the 4 screws 23 2 6 from the flexure sheets 6 2 6 and remove both flexure sheets together with the bases 9 2 6 and spring washers 26 2 6 Note Since the lug of the sensor mechanism is firmly attached to the balance arm the sensor mechanism must be unscrewed to dismantle the balance arm and gently tilted back 3 4 5 6 Unscrew 2 screws 18 2 6 from the sensor mechanism plate 5 2 6 and remove the plate Unscrew screw 18 2 6 from the connecting board 14 2 6 Unscrew 2 screws 20 2 6 of the sensor mechanism and gently tilt the sensor mechanism to the rear Remove the two inner assembly pins 9 4 1 3 unscrew from the balance arm MRS SH e 081 1 55 56 Remove the two outer assembly pins 9 4 1 3 unscrew from the chassis 8 Remove the two assembly jigs 7 4 1 3 8 4 1 3 Carefully tilt the balance arm 16 2 6 over the magnet 32 2 6 and the sensor mechanism and take out Further dismantling of the weighing cell is unnecessary MR
28. he coil with adhesive tape risk of injury 4 8 3 Final check of cleaning 1 Visually inspect the annular and the coil for any contamination and clean if necessary 58 MRS SH e 081 1 4 9 4 9 1 1 2 3 10 12 Assembling the weighing cell Assembling the balance arm and the support piece To facilitate the assembly the chassis can be placed on the assembly plate attention to the sensor mechanism Pre assemble assembly jigs 7 8 with 2 assembly pins 9 on the chassis as in the drawing below Adjust assembly jigs 7 8 using the alignment jig 14 horizontally in accordance with the drawing below and tighten the two assembly pins 9 with a No 4 socket wrench Carefully introduce the balance arm 16 2 6 over the magnet 32 2 6 and past it to the sensor mechanism Assemble the balance arm with 2 assembly pins 9 loosely behind the assembly jigs The balance arm must remain moveable Introduce the pre assemble support piece 10 2 6 over the two inner assembly posts 9 see the drawing on page 60 It must be possible to push the support piece smoothly over the two assembly pins Locate the support piece and the balance arm using the flexure strap anchor 12 and the two screws 13 see the drawing on page 60 The right inner assembly pin of the assembly jig 8 can now be firmly tightened The left inner assembly pin of the assembly jig 7 can now be firmly tightened Firmly
29. he hood and remove loose parts such as the pan support the windshield and the protection plate 9 Undo the 4 socket head screws 12 4 2 using no 2 screwdriver remove the hood 5 4 2 4 Undo the 2 collar screws 12 4 2 using a no 2 screwdriver and remove the heat shield 6 4 2 5 Slide the safety glass 1 4 2 up and out 6 Undo socket head screw 10 4 2 using a no 0 screwdriver and remove the cover 7 4 2 f Disconnect the temperature safety switch s 2 plug in contacts 8 Undo the hexagon nut 13 4 2 using the no 7 socket wrench and remove the temperature safety switch 4 4 2 9 Replace switch and reassemble in reverse order MRS SH e 0811 47 4 3 Dismantling the top of moisture analyzer The dismantling procedure required for replacing the parts listed below is explained in the following sections Heating board 1 4 3 Fan 2 4 3 Temperature sensor 3 4 3 Plunger 4 4 3 For maintenance work the device must be disconnected from the mains Also ensure that the device cannot be reconnected to the mains by anyone else during the work 2 2 9 2 48 MRS SH e 0811 4 3 1 4 3 2 4 3 3 Replacing the heating board IMPORTANT Disconnect the device from the mains Open up the hood and remove loose parts such as the pan support the windshield and the protection plate 16 4 3 Undo the 2 socket head screws 15 4 3
30. he membrane switches and the main board 7 4 4 must also be detached 5 Carefully tilt the top of balance to the left alongside the balance Note The balance is now ready to be adjusted see Adjustments in chapter 4 10 For dismantling the weighing cell see Dismantling the weighing cell on page 4 6 you need to do the following steps 6 Remove cylinder screw 8 4 4 with a line head screwdriver 4 4 1 3 and the earth cable with the washers 9 10 4 4 7 MRS 120 3 Disconnect the power cable from the power supply board 5 4 4 and remove the top of balance 8 The bottom of balance is now ready for further dismantling see the following pages 52 MRS SH e 081 1 4 5 Introduction Preparation of the balance 4 5 1 Introduction In the event of a broken flexure it is recommended that all flexures be replaced The following assembly instructions provide information on how the flexures can be replaced most efficiently It is important to employ a structured procedure for dismantling since it is essential to replace the same parts particularly screws in the same place when re assembling The various items of the assembly instructions mean Component items 5 4 1 Tooling items see Service tools and equipment in chapter 4 1 Example 3 nuts 24 2 6 means 3 nuts as Item 26 in chapter 2 6 4 5 2 Preparation of the tools Before dismantling the balance it is necessary to carry out some preparation of the to
31. itches Top of housing Cover plate Identification Label Display glass Guidance spring Screw M4x12 Screw M4x6 Screw M3x6 Screw M4x25 Combo nut M4 Lock washer M4 MRS SH e 081 1 Key No ON O CO N lX 2X 2X ci 2X O BON O MRS SH e 0811 Part No 330 0 330 3 330 3000 330 3005 330 4001 330 7019 330 7200 F2 159 F3 189 Description Protection plate Cover Axis Plunger Base Fan Heating board Pressure spring Torsion spring PN 1053 004 Rubber stop PN 1100 054 Screw KA30x8 PN 1100 062 Screw M3x8 PN 1100 148Screw M4x20 PN 1500 004Lock washer PN 1500 051 Lock washer PN 3612 315Fuse 3 15A T 230V PN 3612 630Fuse 6 3A T 115V 11 Key No N A Q N MRS SH e 0811 Part No 330 2008 330 2009 330 2014 330 2016 330 2020 330 4002 330 4003 330 4007 350 4063 PN 1100 043 PN 1100 064 PN 1100 170 PN 1300 050 330 4007 Description Glass holder left Glass holder right Radiator plate cpl Glass holder middle Insert Hood Inserted cover Inspection glass Caution label hot Screw D2 9x6 5 Screw M4x6 Screw M4x8 Speed nut D2 9 Inspection glass 13 2 5 Halogen radiator unit 71 0 14 5 5 0811 Key No O 0 BON gt MRS SH e 081 1 Part No 330 2003 330 4006 330 4009 330 7013 330 7016 330 7023 330 7025 330 8005 F4
32. lity Error repair Error 14 Wrong model code Call service Error 16 Internal RAM destroyed Replace CPU Error 17 External RAM destroyed Replace RAM Error 18 1 Wrong program check sum Load right program replace FLASH Error 18 2 No approved program build in approved Load right program balance Error 18 8 FLASH empty Load right program replace FLASH Error 18 9 Wrong controller check sum Replace CPU Error 19 Wrong code figure Load right code figure Error 20 Temperature measurement defective Call service Error 28 Temperature measurement moisture Call service analyzer defective 70 MRS SH e 081 1 4 12 Discussion with the manufacturer In discussions with the manufacturer s works the following information should be provided Balance type e g MRS 120 3 Series number e g 330 65 Label on the rear of the balance Program number e g 00 00P00 N50 appears on the display when switching on the balance As precise a description of the defect as possible Weighing results Drying settings Preparation of the samples MRS SH e 081 1 71
33. marked T on the housing using a no 4 screwdriver and gently tip the top of the moisture analyzer 17 4 3 back Disconnect the ribbon cable 8 4 3 and power lead 9 4 3 from the heating board and remove the top of the moisture analyzer from the balance Undo the ground wire s hexagon nut 6 4 3 using the no 7 socket wrench from the top of the balance make sure to leave the lock washer 5 4 3 on the top of the balance Undo 2 socket head screws 7 4 3 from the heating board using the no 0 screwdriver and 2 socket head screws 14 4 3 from the mains socket rear panel using the no 2 screwdriver Disconnect the plug in contacts for the temperature sensor radiator power supply and fan from the heating board and remove the heating board 1 4 3 Replace board and reassemble reverse order Replacing the fan IMPORTANT Disconnect the device from the mains Open up the hood and remove loose parts such as the pan support the windshield and the protection plate 16 4 3 Undo the 2 socket head screws 15 4 3 marked T on the housing using a no 4 screwdriver and gently tip the top of the moisture analyzer 17 4 3 back Disconnect the ribbon cable 8 4 3 and power lead 9 4 3 from the heating board 1 4 3 and remove the top of the moisture analyzer from the balance Undo the ground wire s hexagon nut 6 4 3 using the no 7 socket wrench from the top of the balance make sure to leave the lock washer 5 4 3 on the top of th
34. n 55 4 6 6 Removing the support piece aaa 55 4 67 Removing the balance arm sisse einen tnnt 55 4 7 INSTALLING THE NEW FLEXURE SHEETS tett rt tEn tEnt Eart atant En nnr Enaren tenen 57 4 7 1 Removing the old flexure sheets aaa ra 57 4 7 2 Installing the new flexure sheets 56 57 4 8 CEEANINOS E E E A 58 4 8 1 Cleaning the magheti a 58 4 8 2 Cleaning the aija ERR 58 4 8 3 Final Check OF cleaning 58 4 9 ASSEMBLING THE WEIGHING CEN msi teniron iara ea a iaat a i 59 4 9 1 Assembling the balance arm and the support piece 59 4 92 Assembling the coil the magnet cover and the transport safety device 60 4 9 3 Assembling the sensor mechanism the inner cone and the 60 4 94 Assembling the flexure hojQe1S essei eene tnn 61 4 9 5 Assembling new flexure sheets nn 62 4 9 6 Assembling a new flexure strap sss esee nennen either nnn 62 4 9 Dismantling the assembly jigs esses 63 4 9 8 Installing the weighing cell in the bottom of balance 63 4 40 ADJUSTME
35. ols 2 long 2 4 1 3 and 2 short 3 4 1 3 support posts must be screwed into the correct places on the assembly plate 1 4 1 3 see the drawing below and in chapter 4 1 3 The soldering iron should be plugged in or preheated MRS SH e 0811 53 4 6 Dismantling the weighing cell 4 6 1 Removing the top of balance T see Dismantling the top of balance in chapter 4 4 4 6 2 Removing the weighing cell from the bottom of balance 1 On the main board unplug the sensor mechanism plug 12 2 6 using a small screwdriver 2 Turn over the bottom of balance and unscrew the 3 nuts 24 2 6 on the underside of the housing 3 Hold the weighing cell oniy on the chassis and lift it out of the bottom of housing 4 The chassis can now be placed on the assembly plate for easier handling 5 To protect the weighing cell the two assembly jigs 7 4 1 3 8 4 1 3 are introduced in accordance with the drawing see drawing in chapter 4 6 2 and secured with the 4 assembly pins 9 4 1 3 6 Assemble the two assembly jigs 7 8 and 4 assembly pins 9 in accordance with the drawing in chapter 4 6 2 Assembly jig left 7 Assembly jig right 8 1 241 Assembly pins 9 4 6 3 Removing the flexure strap 1 Undo 2 screws 23 2 6 remove flexure strap 3 2 6 incl bases 9 2 6 and spring washers 26 2 6 do not separate screw components assemble in same relationship
36. om the start see Assembling the coil the magnet cover and the transport safety device in chapter 4 9 2 MRS SH e 081 1 4 10 4 Adjusting of the corner load 1 Place the service weighing pan 3 4 1 2 on the balance 2 Tare the balance with the TARE key 3 Check with a test weight for corner load see Final check in chapter 4 10 12 the deviation between the two diagonals A C and B D see next page The diagonal with the larger absolute deviation should be adjusted first 4 Adjustment of the corner load is effected by turning the screws 1 2 in the direction of the arrow MRS SH e 0811 65 Example of corner load adjustment 1 The diagonal has the larger difference 2 Place a test weight at point of the weighing pan Tare the balance using the TARE key 3 Move the weight to point A 4 There is a difference of 12 digits between points A and C A 12 C Tare 0 5 The displayed value for point A is reduced by turning the corner load screw 1 above point A in a clockwise direction the difference between A C becomes smaller 6 There is a difference of 7 digits between points B and D B 7 D Tare 0 7 The displayed value for point B is reduced by turning the corner load screw 2 above point B in an anti clockwise direction the difference between B D becomes smaller 8 The diagonals A C and B D should be repeatedly adjusted until the two diagonals have reached the pe
37. rOAHHa 0 geo HIN 1dsd lt 01 ND so kt a Eje Z um lt 1 za au 221 INH ayepdn e HO 20 SISY9Yd 2 MRS SH e 0811 22 912 02 2002 60 90 34001 0001 zo QNO lt ASE ANOL W6L8SN IO Menos N6LSSNL 8 4 9 9 9829901 11 das ty ASEHNOL NMALHS 3SN3S ANO vo L3 0 9 O 9 9 6 99 0 27 NOL dsida O d W6L8SNL ea sa 001 99 98 102 Hnoos O md 090 AS Ag 1 a 23 MRS SH e 081 1 gobed 812 026 2002 20 90 990 3en 9SMYA gea L olaxa HINI 0307386 181 MRS SH e 0811 NMOGLNHS lt ___ 24 90884 893 026 2002 60 90 90 811 ONY j 9 2101 438 oro 8 O noL 54001 evo wo 96984
38. re supplied The faulty temperature calibration set must be returned for repair to KERN amp Sohn GmbH 4 MRS SH e 0811 1 2 Consumables 1 CN 2 Key No Part No Description 1 MLB AO1 Aluminium pans 80 pieces in a box 2 RH A02 Glass fibre papers 100 pieces in a box MRS SH e 081 1 2 Mechanics 2 1 Bottom of balance 6 MRS SH e 081 1 Key No O ccc CO WWNA O O N MRS SH e 0811 Part No 240 4048 320 2010 320 4056 320 7005 320 7015 320 7032 003 320 7204 010 320 7215 020 330 2017 330 7015 330 7020 330 7021 330 7201 010 PN 1100 023 PN 1100 171 PN 1500 010 PN 1500 035 PN 1700 034 PN 3730 001 320 4049 PN 1100 240 PN 3612 006 PN 3612 012 Description Screw Cover Adhesive tape for leveling unit Bottom of housing Leveling screw Measuring resistor Display board MRS 120 3 Main board MRS 120 3 Cover Ground wire short Signal cable Connecting cable main Power supply board Screw M3x6 Screw M4x10 Lock washer M4 Lock washer M4 Rivscrew Leveling unit Display holder Screw KA25x10 Fuse 63mA 230V Fuse 125 115V 8 MRS SH e 081 1 Key No COND WD MRS SH e 081 1 Part No 330 4012 330 4015 330 7000 330 7008 330 7022 350 4098 F4 184 PN 1100 176 PN 1100 211 PN 1100 216 PN 1100 227 PN 1300 051 PN 1500 010 Description Rubber bushing Membrane sw
39. re safety switch sss sienne 47 4 3 DISMANTLING THE TOP OF MOISTURE ANALYZER sisse nennen nnne neni 48 4 8 1 Replacing the heating sss esee enne enne 49 4 3 2 Replacing the Tan oops pra rH ee 49 4 3 3 Replacing the temperature 50 u u u u u u 49 4 34 Replacing or cleaning the plunger L 50 4 4 DISMANTLING THE TOP OF este 51 4 4 1 General procedure for opening the balance 52 4 5 INTRODUCTION PREPARATION OF THE BALANCE n 53 4 5 1 Introduction gs va sam st S 53 4 5 2 Preparation of the OOS dedicates 53 4 6 DISMANTLING THE WEIGHING CELL enne nnn entren rennen nennen neni 54 4 6 1 Removing the top of balance nnn 54 4 62 Removing the weighing cell from the bottom of balance 54 4 63 Removing the flexure strap isses nennen 54 4 6 4 Removing the two flexure holders isses eene einen sense 55 2 MRS SH e 0811 4 6 5 ma E adas da eror e ipee ere
40. rmitted tolerances for corner load see Final check in chapter 4 10 12 9 Place a test weight on point Z of the weighing pan tare balance using the TARE key 10 Check the points A B C D against the permitted tolerances and correct if necessary 66 MRS SH e 081 1 4 10 5 10 4 10 8 Final assembly of the balance Disconnect the balance from the mains pull out the mains cable or power supply If a power supply has been used re attach the cover 9 2 1 The service weighing pan 3 4 1 2 and the service membrane switches 2 4 1 2 must be removed from the balance Reconnect the ribbon cable to the power supply board Reconnect the ribbon cable of the membrane switches to the main board D1 4 10 1 1 IMPORTANT Screw up the ground wire on the bottom of balance Check ensure that the power supply cable 5 4 4 is connected to the power supply board CAUTION Pay attention that during the following operating sequence the weighing cell will not be damaged and no cable will be caught Place the two parts of the housing together and fasten with 3 screws Protection plate windshield and pan support must be inserted The balance must have attained its operating temperature before further adjustment can be carried out Checking the corner load The balance must have reached its operating temperature Check the corner load tolerance see Adjusting of the corner load in chapter 4 10 4 Linearization of the balance
41. temperature and must be in service mode e nevery linearization of a balance the correction factor is deleted and must if necessary be redefined 4 10 9 2 Entry of the correction factor 1 lace a weight of 1 4 full load in the centre of the weighing pan note the difference between the actual weight and the weight indicated by the balance 2 lace a weight of 3 4 full load in the centre of the weighing pan note the difference between the actual weight and the weight indicated by the balance Sb Sa 4 10 9 3 Calculating the correction factor For the correction factor the sign of the measured value must be reversed For example 4 digits were measured 4 digits must be entered For example 2 digits were measured 2 digits must entered 4 10 9 4 Entry of the correction factor 1 Press and hold down the until SCORRECTION appears on the Info Display then release the key 2 Using the function key F2 SECTOR the correction range Sa or Sb is established Using the function key and F4 DOWN the chosen correction factor is entered and set with the function key F1 SET 4 Submit the balance to a further final check see Final check in chapter 4 10 12 4 10 10 Temperature linearization 1 The balance has to be set in service mode see Activation of the service mode chapter 4 10 1 2 The temperature calibration set part no 350 8570 page 2 ne
42. tighten the two screws 13 of the fixed flexure strap anchor 12 The support piece and the balance arm are now fixed MRS SH e 081 1 59 4 9 2 4 9 3 60 Assembling the coil the magnet cover and the transport safety device Place the coil onto the balance arm and centre with the centering spigot 11 4 1 3 Screw the coil tightly onto the balance arm with 2 brass screws 19 2 6 and 2 washers 25 2 6 The coil must be centered in such a way that the centering spigot can be removed smoothly Pre assemble the magnet cover 8 2 6 with 2 screws 21 2 6 screws left and right Pre assemble the transport safety device 4 2 6 with the third screw 21 2 6 and spring washer 26 2 6 gently tighten Adjust the transport safety device in the balance arm in such a way that the transport safety device does not touch the balance arm and a uniform annular gap is formed visual check with the lens Assembling the sensor mechanism the inner cone and the stopper Press the sensor mechanism carefully into the cutout in the chassis in the direction of the magnet and secure to the chassis with 2 screws 20 2 6 Firmly screw the connecting board 14 2 6 onto the chassis with screw 18 2 6 3 Fix the sensor mechanism plate 5 2 6 with 2 screws 18 2 6 to the chassis Solder the two connecting wires 1 2 6 in parallel and strain free to the connecting board 14 2 6 Assemble the inner cone 17 2 6 to the support pi
43. xplained on the following pages MRS SH e 0811 63 4 10 4 10 1 IS 4 10 2 64 Adjustments Activation of the service mode Push and hold simultaneously the TARE and PRINT key for approx 10 sec whilst switching on the balance after connected the power cable As soon SET SERVICE MODE appears in the display then release the two keys Push the CHANGE key CODE 0 appears in the display Press ENTER key CODE 0000 appears in the display With the arrow keys insert the code 5236 and confirm with the ENTER key The balance is now in service mode Adjusting of the symmetry Connect the connecting cable 15 4 1 3 from the tool set to plug S3 4 10 1 1 on the main board 2 Connect the voltmeter to the connecting cable The voltmeter must show approximately the same voltage in the end positions of the balance arm one positive one negative If the difference is too great the position of the balance arm can be adjusted with the symmetry screw Detach connecting cable and voltmeter from the balance Checking the pre load The pre load error ERROR 60 below minimal converter range must not appear when the service weighing pan is in position without load The pre load error ERROR 61 above maximal converter range must not appear when the service weighing pan is in position with full load If an ERROR is displayed the symmetry must be re adjusted and the transport safety device adjusted fr
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