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| All equipment shall be inspected for compliance with appropriate dimensions, as stated in each standard, as well as to determine if it is in satisfactory operating condition (i.e.; adherence of mortar, deformed molds, etc.). Inspection shall occur at least annually, or whenever there is reason to suspect nonconformance with the standard. |
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| Item | Balance | |
| Description | Readable to 0.1% of sample mass or better | |
| Calibration Item | Verify mass readings | |
| Calibration Procedure | AASHTO M 231 | |
| Calibration Interval | 12 months | |
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| Item | Sieves | |
| Description | As required for desired application | |
| Calibration Item | Check openings and physical condition | |
| Calibration Procedure | AASHTO M92 | |
| Calibration Interval | 6 months | |
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| Item | Charges | |
| Description | Steel spheres, averaging 1 27/32 inches in diameter and weighing between 390 g and 445 g. | |
| Calibration Item | Verify mass and diameter | |
| Calibration Procedure | Verify | |
| Calibration Interval | 12 months | |
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| Item | Los Angeles machine | |
| Description | Measure of degradation of mineral aggregates | |
| Calibration Item | AASHTO T 96 | |
| Calibration Procedure | Verify | |
| Calibration Interval | 12 months | |
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