| | CALIBRATION OF LABORATORY SOILS TESTING EQUIPMENT |
| | 0,72 | | MB |
| | 45 | | stron |
| | 2142 | | ID | UNITED STATES ARMY CORPS OF ENGINEERS |
| | 1998 | | rok |
| | Table of Contents |
| | Purpose 1 1 |
| | Applicability 2 1 |
| | References 3 1 |
| | Introduction 4 1 |
| | Need for Calibration of Equipment 4a 1 |
| | The Laboratory Environment 4b 1 |
| | Linear Measurements 5 3 |
| | Rules and Tapes 5a 4 |
| | Cathetormeters 5b 4 |
| | Optical Reticles 5c 4 |
| | Calipers 5d 6 |
| | Dial Gages 5e 6 |
| | Electrical Devices 5f 8 |
| | Gage Blocks 5g 9 |
| | Volumetric Measurements 6 10 |
| | Cylinders and Molds 6a 10 |
| | Volume by Linear Measurement 6a(1) 10 |
| | Volume by Water-Filling Method 6a(2) 10 |
| | Volumetric Flasks 6b 10 |
| | Graduated Cylinders 6c 10 |
| | Burettes, Pipettes, and Standpipes 6d 11 |
| | Weight and Force Measurements 7 13 |
| | Balances and Scales 7a 13 |
| | Deadweights 7b 14 |
| | Load Frames and Rings 7c 16 |
| | Proving Rings 7d 16 |
| | Load Cells 7e 17 |
| | Procedure for Calibration of Load Rings, Frames, and Load Cells 7f 17 |
| | Inspection of Knife Edges in Lever Systems 7g 19 |
| | Pressure Measurements 8 21 |
| | Primary Standards for Pressure Measurements 8a 21 |
| | Dead Load Tester 8a(1) 21 |
| | Precision Laboratory Test Gages 8a(2) 21 |
| | Quartz Tube Pressure Gage 8a(3) 21 |
| | Bourdon Tube Pressure Gages 8b 21 |
| | Test Gages 8b(1) 25 |
| | High Quality Gages 8b(2) 25 |
| | "Industrial Gages" 8b(3) 25 |
| | Transducers 8c 25 |
| | Procedures for Calibration of Pressure Gages and Transducers 8d 25 |
| | Manometers 8e 27 |
| | Temperature Measurements 9 27 |
| | Thermometers 9a 27 |
| | Liquid-Filled Glass Thermometers 9a(1) 27 |
| | Bimetallic Strip Thermometers 9a(2) 28 |
| | Resistance Thermometers 9a(3) 28 |
| | Thermocouples 9a(4) 28 |
| | Temperature Variation Within Ovens 9b 28 |
| | Time Measurements 10 29 |
| | Other Measurements 11 29 |
| | Levelness 11a 29 |
| | * Calibration of Mechanical Compaction Rammers 11b 29 |
| | Calibration Frequency 11b(1) 29 |
| | Preliminary Checks 11b(2) 29-1 |
| | Calibration Procedure 11b(3) 29-1 |
| | Adjustment of Mechanical Rammer 11b(4) 29-1 |
| | Calibration of Hydrometers 11c 29-2 * |
| | Compression of Consolidation Equipment 11d 32 |
| | Piston Friction in Triaxial Equipment 11e 33 |
| | Determination of Extension Modulus of |
| | Rubber Membrane 11f 34 |
| | Calibration of Liquid Limit Device 11g 34 |
| | Initial Checks 11g(1) 35 |
| | In-Use Checks 11g(2) 36 |
| | Amplitude of Vibration of Vibratory Table 11h 37 |
| | Recommended Calibration Schedule 12 37 |
| | Permissible Tolerances 13 38 |
| | Appendix A References 1 |