OHAUS DISCOVERY BALANCE, Руководство по обслуживанию

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TABLE OF CONTENTS
LIST OF ILLUSTRATIONS (Cont.)
FIGURE NO. TITLE Page No.
3-7 Scale drawing of Discovery Balance Display Parts ...............................................3-5
3-8 Removing screws to separate Display Housing from bottom of balance ..............3-6
3-9 Display Balance Load Cell Cover ..........................................................................3-7
3-10 Discovery Balance Printed Circuit Board (PCB)....................................................3-8
3-11 EEProm chip, next to battery on main PCB ..........................................................3-8
3-12 PCB Cover has alternating teeth to secure it to the Mounting Plate .....................3-9
3-13 Removing Display Cable Shield Plate .................................................................3-10
3-14 The InCal Weight Cover sits beneath the Display Cable Shield Plate ................3-11
3-15 Weights and Weight Holders can be removed,
but should only be handled while wearing a clean glove ....................................3-11
3-16 InCal Weight hardware with Weights and Weight Holders removed.
Weight Arms with black tips are on either side of the Cantilever Arm .................3-12
3-17 Calibration Motor Assembly, installed to the right of the Load Cell .....................3-13
3-18 Calibration Motor Assembly, closeup, showing screws that secure it .................3-13
3-19 Calibration Motor Assembly ................................................................................3-14
3-20 Calibration Motor close-up, showing cam in rest position ...................................3-14
3-21 Removing Display Cable Shield Plate .................................................................3-15
3-22 The InCal Weight Cover sits beneath the Display Cable Shield Plate ................3-16
3-23 Removing Weights and Weight Holders, while wearing a clean glove................3-16
3-24 Lifting off the PCB and its Mounting Plate from the Load Cell ............................3-17
3-25 Lifting off Load Cell Cover ...................................................................................3-17
3-26 Load Cell with cover removed .............................................................................3-18
3-27 Removing Cantilever Arm from Load Cell ...........................................................3-18
3-28 Bottom Housing of Load Cell...............................................................................3-18
3-29 Load Cell chassis, with keyway position highlighted ...........................................3-19
3-30 Load Cell removed ..............................................................................................3-19
3-31 Removing screws from Load Cell top Cover .......................................................3-20
3-32 Load Cell with top cover removed .......................................................................3-20
3-33 Removing screws from Load Cell bottom Cover .................................................3-20
3-34 Load Cell with bottom cover removed .................................................................3-20
3-35 Screws on bottom Flexure Arm assembly ...........................................................3-21
3-36 Screws on top Flexure Arm assembly .................................................................3-21
3-37 Service Toolset, Part No. 80030340 ...................................................................3-22
3-38 Brass Fixture inserted part way under the Load Cell’s Hanger ...........................3-22
3-39 Brass Fixture fully inserted under the Load Cell’s Hanger ..................................3-22
3-40 Thumb screws and Hanger on top of Load Cell ..................................................3-23
3-41 Screws securing Load Flexure to Hanger on top of Load Cell ............................3-23
3-42 Load Cell with Load Flexure, 2 screws and 4 washers removed ........................3-24
3-43 Flexures can be removed from Flexure Arm
after removing Flexure Arm from Load Cell frame ..............................................3-24
3-44 Removing the top Flexure Arm............................................................................3-24
3-45 Solder points connecting fine wire to Load Cell PCB ..........................................3-25
3-46 Lifting Ratio Beam to insert Brass Rod ...............................................................3-26
3-47 Brass Rod installed .............................................................................................3-26
3-48 Screwing in Threaded Rod on front of Load Cell ................................................3-26
3-49 Removing screws from PCB. (Note stepped washer under rear screw) .............3-27
3-50 Magnet Cover without PCB .................................................................................3-27
3-51 Solder points on top of Load Cell PCB ................................................................3-27
Ohaus Corporation www.ohaus.com iii Discovery Balance Service Manual