• Conveyor Design Requirements
• Principles of In-Motion Weighing
• Mechanical Installation
• Belt-Way Integrator Features
• Networking / Data Collection Options
The first Choice of the American Aggregate Producer
C D i R i tConveyor Design RequirementsA id Hi h S dAvoid High Speed
Use Well Balanced (Concentric) Idlers to Minimize Vibration
“String-Line” Idlers
Conveyor Should Not Exceed 1000 ft. in Length
Belt Speed Should Not Exceed 300 FPM on Belts <25’ in LengthBelt Speed Should Not Exceed 300 FPM on Belts <25 in Length
Conveyor Should be of a Rigid Design and Free of Vibration
Belt Tension Must Remain Consistent.
E t B lt M t b i C t t ith Idl t ll TiEmpty Belt Must be in Contact with Idler at all Times
Belt Must Track in the Center of Idlers (Both Empty and Full)
C D i R i tConveyor Design RequirementsSh lt B lt f th F f Wi d d R iShelter Belt from the Force of Wind and Rain
Maximum Idler Troughing Angle - 35%
Conveyor Angle Must Not Exceed Material Angle of Slide
Conveyor Loading Must be Uniform & Away from Weigh BridgeConveyor Loading Must be Uniform & Away from Weigh-Bridge
Impact Idlers Recommended at Feed Location to Prevent Deflection of Belt
Avoid Material Build-Up on Belt
Avoid Vertical Curves on the ConveyorAvoid Vertical Curves on the Conveyor
Where Scale Idler is Located Within 25’ of the Head Pulley, Position the Carry Rolls a Minimum of 1/2” Above the Crown of the Head y
Pulley
Scale Application DataScale Application Data
Belt Load (lb / ft) = Maximum Rate (TPH x 2000 (lbs / ton)Belt Speed (ft / min) x 60 (min / hr)( ) ( )
Net Load Cell Force (lbs) = Belt Load (lb / ft) x Idler Center Distance (ft)
Model 45 weight range 15 lb. - 90 lb.Model 100 weight range 40 lb. - 250 lb.Model 200 weight range 80 lb. - 500 lb.M d l 500 i ht 250 lb 1 250 lbModel 500 weight range 250 lb. - 1,250 lb.Model 1000 weight range 500 lb. - 2,500 lb.
D d L d (B lti W i ht Idl S i ) + Idl W i htDead Load = (Belting Weight x Idler Spacing) + Idler Weight
Gross Load Cell Force = Net Load Cell Force + Dead Load
Belt Speed (FPM) = ((Conveyor Length x 2) / Seconds per Revolution) x 60))
Belt-WayBelt WayConveyor Belt Scale
Modular System
Low Cost Design
Fits any Width Conveyor
Universal Compatibility of ComponentsUniversal Compatibility of Components
Minimal Cost for Redundant Parts
Minimal Down Time for Repairs
Mechanical InstallationSlide Scale Support Pipes Through Load Cell Assemblies
Mechanical InstallationSlide Scale Support Pipes Through Load Cell AssembliesUse Leveling Plates as Template for Mounting Holes
Mechanical InstallationUse Leveling Bolts to Adjust Height of Scale Idler
Mechanical InstallationUse Leveling Bolts to Adjust Height of Scale Idler
Mechanical InstallationAnchor Scale Support Pipes to Conveyor Frame with U-Bolts
Mechanical InstallationAnchor Scale Support Pipes to Conveyor Frame with U Bolts
Patented Self Aligning Weigh FrameF f t i l t f d di tl t th l d ll ( thForce of material transferred directly to the load cells ( the
weighing instrument). No mechanical levers, torsion tubes, or pivot points, which adversely affect scale accuracy and repeatability.
Scale Frame is free of mechanical binding and rigidity found in all other designs Rigidity in the scale frame produces non linearity
The load cell assembly should only touch the
top of the pipe other designs. Rigidity in the scale frame produces non-linearity.
Floating Frame Design reads the true weight of material, but is isolated, in large part, from mechanical “noise” and vibration of the conveyor.
top of the pipe.
The load cell assembly should not touch theshould not touch the
sides of the pipe.
Incorrect Installation
Pi i i li dPipe is misaligned.
U-Bolts should be loosened and pipeloosened and pipe should be shifted to the center of the oval hangarshangars.
NEMA 4XE lEnclosure
Vacuum Fluorescent Display
EMI Resistant Coating
Auto Zero
Internal Data Logger
RS-232 Interface
Connect to PC or Modem
Independent Master Total
Maximum 92,000,000 Tons
Initial CalibrationS ( )Set Maximum Weight Range - Based on Expected Rate (tph)
Press SET ZERO key with Belt Running Empty
Records Tare Weight Subtracted During Normal Operation
Enter Test Weight Value
Press CHECK SPAN with Test Weights Installed and Belt Running
Routine CalibrationRoutine Calibration
Press SET ZERO key with Belt Running Empty
Press CHECK SPAN with Test Weights Installed and Belt RunningPress CHECK SPAN with Test Weights Installed and Belt Running
Belt-Way NETWORKInterface all Scale Controllers Using Coaxial Cable
Belt Way NETWORK
Consolidate and Monitor Data from all Scales using the Belt-Way Remote Display
Connect the Belt-Way Remote Display directly to a Compact Flash Recorder or P.C.
RecapCompany Focus - Conveyor Belt Scales
Modular DesignFits Any Width ConveyorEasy Low Cost InstallationSelf Aligning “Floating Frame” DesignSelf Aligning Floating-Frame Design0Direct Force of Material on Weighing Instrument
aSignal to Noise Ratio is Enhanced by Elimination of Mechanical Interference0Enhances Accuracy and Repeatabilityy p y
aNo Mechanical “Binding”0Holds Calibration
Universal Compatibility of Components0Low Parts Cost0Minimal Down-Time for Replacement
State of the Art ElectronicsState-of-the-Art ElectronicsEasy to Read Vacuum Fluorescent DisplayNEMA 4X EnclosureEMI ProtectionElectrostatic Discharge Protection