OHAUS Valor 2000 Service Manual

Also see for CS 2000: User guide Instruction manual Operating manual Operating manual Operating manual

CHAPTER 4 TESTINGOhaus Corporation www.ohaus.com 4-4 Valor™ 2000 Series Service Manual4.4.2 Repeatability TestTABLE 4-2. REPEATABILITY WORKSHEETn Reading Delta = Reading – Mean Delta x Delta12345678910n = number of Reading Mean = Sum of readings / 10 Delta = Reading – MeanStandard Deviation = Square Root of (sum of (Delta x Delta) / 9)5. Add the ten readings and divide the total by 10 to find the Mean (average).6. Mean = (Reading 1 + Reading 2 + Reading 3 + Reading 4 + Reading 57. + Reading 6 + Reading 7+ Reading 8 + Reading 9 + Reading 10) / 10Mean =________6. Calculate the Delta for each reading and record in the work sheet.Delta = Reading – Mean7. Calculate the Delta x Delta for each reading and record in worksheet.8. Add the ten Delta x Delta values and divide by 99. Calculate the Standard Deviation by applying the square root of the result from step 8.Standard Deviation =___________Note: If the balance does not meet specifications, move it to a suitable location, ensurethat it is level, and try again. If it still does not meet specifications, perform a servicecalibration, and try again. (See Appendix B for Service Calibration.)