OHAUS PA64 Service Manual

Also see for Carat PAJ1003: Instruction manual

Contents

OHAUS PA64 Service Manual Manual pdf 60 page image

CHAPTER 3 MAINTENANCE PROCEDURESOhaus Corporation www.ohaus.com 3-36 Pioneer™ Balances Service Manual3.3.22 Internal Calibration TestingThis section describes how to test the internal calibration in a Block Style Load Cell. There canbe several reasons that internal calibration does not function, including a broken or jammedInCal Mechanism, a defective InCal Motor, or a defective Main PC Board. To test the internalcalibration, proceed as follows:1. Connect an RS232 cable and a computer to the balance.2. Follow instructions in Appendix C, Section C.5.1, Incal Weight Mechanism Testing.3. Observe the motion of the InCal Weight when you press Raise or Lower.If the weight does not move, replace the InCal Motor. (See Section 3.3.21.)4. If the operation is not smooth, replace the entire InCal Mechanism. (See Section3.3.22.)3.3.23 InCal Motor Removal & Replacement1. Remove the balance’s Housing and Load Cell, as described in earlier sections.2. Remove the two screws holding the InCal Motor and InCal Motor Shield in placefrom the InCal Mechanism. (See Figures 3-99 and 3-100.)Figure 3-99. InCal Motor. Figure 3-100. InCal Motor Removal.3. With the Incal Weight in upper-mostposition, the Motor Coupler shouldbe in the position shown inFigure 3-101.Figure 3-101. Motor Coupler.Screws holdingInCal MotorInCal MotorArtInCalMechanismArtInCal MotorShieldArtMountingScrewsArtInCal WeightMotorCoupler