Weight Carts in Testing Large Capacity Scales

1
Weight Carts in Testing Large Capacity Scales

• Field Test Standards

2
Guidance

• Safety Awareness
• Identification
• Marking
• Suitability
• Repeatability
• Calibration

• Design
• Associated Equipment
• Tolerance (fully loaded)
• Adjustments/Repair
• Influence Factors
• Maintenance

3
Current ST Issues

• 1998 - Verification Intervals (ST Items 320-6
  and 322-1)
• 2000 - N.1.3.4.(a) Vehicle Scales, Axle-Load
  Scales, and Livestock Scales With More Than Two
  Sections Test Pattern (ST Item 320-3)

4
Typical Field Use

• DEVICES
• Livestock Scales
• Railway Track Scales
• Vehicle Scales

• ORGANIZATIONS
• NTEP (National Type Evaluation Program)
• State and Local Weights and Measures
  Jurisdictions
• GIPSA
• Service Agencies

5
Benefits Concerns

• Field Test Weights
• Time
• Resources
• Safety

• Accuracy
• Extensive and Burdensome Requirements
• Unwarranted
• Retroactive

6
Direction

• Test Methods Consistent with Handbook 105
• appropriate use
• minimum test load
• verification
• duplicates actual use