Sterling 882.00722.00 manual GH Calibration, Weigh Hopper Load Cell Calibration

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GH Calibration

The load cell on a GH Hopper is FACTORY CALIBRATED. Since the load cell can be subject to shock loading during shipping, moving, etc., we recommend that they be recalibrated.

The heart of the rate monitor system is the load cell and the supplied calibration weight. Since the load cell is weighing the amount of material entering the process, proper calibration of the load cell is essential for the correct and accurate operation of the rate monitor. This calibration must be performed upon initial installation and startup. The calibration should also be checked once a month with a calibration weight and if necessary recalibrated to ensure that it has not been damaged in the normal routine of removing and replacing the weigh hopper for cleaning.

The calibration of the load cell is accomplished by using two reference points on the output of the load cell scale. The first of these points is known as the “Tare Weight”. This is the weight of the empty weigh hopper assembly on the load cell. This is also known as the zero weight point (starting point) of the scale. This zero or starting point must be initialized with an empty weigh hopper. There must be no binding or leverage put on the load cell.

The second weight point used in the load cell calibration procedure is a known amount of weight for the weigh hopper. A calibration weight is provided with all rate monitors. The calibration weight is stamped with its actual weight on top. If this is not available, any object with a known weight accurate to the nearest 1/1000th of a pound, in the 2 - 10 lb. range, proportional to your size rate monitor, will suffice. (The weight should be as close as possible to the weigh hopper’s capacity.) The weight will be in pounds, unless the rate monitor is provided for metric operation. In the case of a metric display, the weight to be used is calibrated in kilograms.

Given the two weight points on the load cell scale, the controller should determine any other weight on the load cell span. This is limited to the maximum capacity of the load cell. The standard load cell used on rate monitors has a span accuracy of 1/10%.

The maximum capacity of each load cell is clearly marked on top of the load cell. This value will be indicated in kilograms (1 kg = 2.2 lbs.).

Weigh Hopper (Load Cell) Calibration

1.From the “Recipe” Page, touch the Manufacturer’s icon and enter “5413”, then press the “Enter˝ key.

2.Touch “Calibration” and then “Scale Calibration”.

Chapter 3: Installation

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Contents GH-M Rate Monitor Allen-Bradley Controller Write Down Your Serial Numbers Here For Future Reference If the Shipment is Not Complete Shipping InfoUnpacking and Inspection Event of Shipping DamageReturns Warranty ReturnsCredit Returns Table of Contents Maintenance How to Use This Manual SafetySafety Symbols Used in this Manual Safety Tags and Warning Labels Description Wear Safety Glasses and Work Gloves Follow all Safety CodesGeneral Responsibility ResponsibilityOperator Responsibility Remember Reporting a Safety Defect Maintenance ResponsibilityGeneral Description AccessoriesFunctional Description Models Covered in This ManualCustomer Service Mechanical Features Typical Features and ComponentsController Features System Component Description Extruder Inductive Proximity SwitchSurge Hopper Weigh Hopper OpenFunction Typical GH-M Operator Screen Operator Screens Common to all GH Systems Typical Setup Screens Ethernet Module Optional ComponentsPneumatic Slide Gate below surge hopper Safety FeaturesLow Level Proximity Sensors Uncrating the Equipment InstallationMechanical Installation Mounting ConfigurationsMachine Mount Electrical ConnectionsPneumatic Connections Extruder RPM connection Weigh Hopper InstallationInitial Set-up Mechanical Set-upDisplay Startup Screen Final ConnectionsController Set-up Recipe Page Start GH Controller Menu StructureWeigh Hopper Load Cell Calibration GH CalibrationDisplay Calibration Menu Screen WTP/RPM Calibration Hopper Size SetupHauloff Setup and Encoder Calibration Extruder SetupNetwork Setup Alarm SetupPanelView Configuration Screen Setting Date and TimeOperation GH-M Operation ProceduresOperator Displays Typical Operator Screen for GH Full Control system GH Full Control Operation ProceduresGH-F Gravimetric Feeder Operation Procedures Typical Manual Control Operator Screen Common ScreensAlarms with Descriptions Alarm FlagsPrint Inventory Preventative Maintenance Schedule MaintenanceInternal Components of the Control Panel Preventative MaintenanceCorrective Maintenance ElectricalOutput Signals from Programmable Controller Input Signals to Programmable ControllerIntroduction TroubleshootingProblem Problem Corrective actionWarranty Liabilities Warranty and Spare PartsWarranty Specifications Warranty RestrictionsAnnex B Information Customer ResponsibilitiesTypical Surge Hopper Assembly Parts List Passwords Addendum Service Supervisor InformationProgrammable Settings Typical Engineering Only Setup Screen WTP/RPM Filter Percent of hopper Method DefaultExtruder Pulse Count Method Full Hopper MethodMechanical Options Screen Max Allowed WTP/RPMTypical Analog Options Analog options screen Diagnostics ScreenUnits Customer Setup MenuPassword Protection Alarm LogAllen-Bradley Communications Manual Below are the items that can be accessed for the GH HopperAppendix Reload TOO Long Fixed Decimal Explanation Parts Department Service Department Sales DepartmentContract Department
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