NCR 74 OFX (7874) - Perform the Calibration Procedure

Chapter 3: Installation 3-13
TheRealScan74maintainsanaudittrailofscalecalibrationandweighsparameter
setting.Theaudittrailconsistsoftwoevencounters.Displaytheaudittrailcountby
pressingandholdingtheScaleZerobuttonontheOperatorDisplayPanel.The
displayalternatesbetween
Cal xxxandPar xxx.TheCalvalueisthenumberof
timesthescalehasbeencalibrated.TheParvalueisassociatedwiththeweigh
parametersettingandshouldneverchange.
Note: TheaudittraildisplaysonlyonunitswiththeRealScan25RemoteDisplay.
Note: Somehostterminalscancorruptthecalibrationsettingsif
theyareconnected
duringscalecalibration.Therefore,NCRrecomm endsdisconnectingtheinterface
cablebeforestartingcalibrationofthescaleandthenreconnectitaftercompletingthe
calibrationprocedure.
Perform the Calibration Procedure
Note: IfaprotectiveplasticcoveringispresentontheTopPlateortheclearplastic
doorbelowtheTopPlate,ensurethatitisremovedbeforecalibratingtheScale.
Thescalefirmwarecontrolsthecalibrationprocedure.Itwaitsfora responsetoeach
promptbeforegoingtothenextstep.
Thefirmwareusesthevoicefeatureandthe
displaytoidentifyhowmuchweighttoplaceontheTopPlate.Aftertherequired
weighthasbeenplacedontheTopPlateandtheScaleZerobuttonispressed,the
firmwaresoundsasingletoneandgoestothenextprompt.
The
calibrationprocedurecanbeendedbeforecompletionbyturningtheunitoff.
However,ifthisisdone,thescalemuststillbecalibratedbeforeplacing itintoservice.
Note: Thepoundandkilogramweightsusedforcalibrationarenotequivalent
values.Theyaretheactualweightsthefirmwareneedstoperform
thecalibration.
Note: TurnofftheEASsystemduringscalecalibration.