APPENDIX A STANDARD CALIBRATIONA.4 Calibration Adjustment (Cal Adj)Calibration Adjust may be used to adjust the result of the internal calibration by ± 100 counts.Note: Before making a calibration adjustment, perform an internal calibration. To verify whetheran adjustment is needed, place a test mass on the Pan and note the difference (in counts)between the nominal mass value and the actual reading. Refer to Table 1-1, Masses Used ToTest Discovery Balances, and use the highest value from the Span Calibration Points column asthe test mass.If the difference is within ± XX count, calibration adjustment is not required. If the differenceexceeds ± XX count, calibration adjustment is recommended. [INFO TO COME…]Following a calibration adjustment, repeat the internal calibration and verification procedures.With the balance on, press and hold Cal Menu until Menu Calibrate is displayed withCALIBRATE blinking, then release the button. Press Yes to enter calibration.CAL AUTOCAL is displayed. Press No. CAL SPAN is displayed. Press No.CAL TEST is displayed. Press No.Press Yes to enter the CAL ADJ sub-menu and viewthe current setting.There will be a number value with “d” in the sub-menu.If the actual reading is less than the nominal massvalue, a positive adjustment is required.Press No to increase the d value. Press it until thesetting matches the desired d value.Press Back to decrease the d value until the settingmatches the desired d value.Press Yes to accept and store the setting.TABLE A-1. CALIBRATION MASSES FOR DISCOVERY BALANCE MODELSModel Span Calibration Points (1) Weight ClassDV114C 100g ASTM Class 1 OIML E1DV214C 200g ASTM Class 1 OIML E1DV314C 300g ASTM Class 1 OIML E1DV215CD 200g ASTM Class 1 OIML E1Discovery Balance Service Manual A-5 Ohaus Corporation www.ohaus.com
