CHAPTER 2 DIAGNOSISTABLE 2-4. BALANCE CANNOT CALIBRATE USING EXTERNAL WEIGHTSSYMPTOM PROBABLE CAUSE REMEDYBalance can be turned onbut will not calibratemanually.Incorrect weights.Balance is set for Legal ForTrade operation.Balance not level.Balance is unstable.Verify that proper weightsare used.Set the Setup Menu LegalFor Trade setting to Off.(See Instruction Manual,Sections 3.7.12 & 3.8.)Level balance.Perform Automatic InternalCalibration.->Appendix A.1.If the balance fails tocalibrate properly, enter theservice mode (Appendix B)and perform a SpanCalibration. If this fails,check the InCal WeightAssembly and the LoadCell Assembly (Section3.1.5 – 3.2.7). Ensure thatall parts are clean andproperly aligned.Ohaus Corporation www.ohaus.com 2-4 Discovery Balance Service Manual
