Equipment Checklist for AASHTO T 255 - 92
Total Moisture Content of Aggregate by Drying
 
All equipment shall be inspected for compliance with appropriate dimension s, as stated in each standard, as well as to determine if it is in satisfactory operation condition (i.e. clean, tight and serviceable). Inspection shall occur at least annually, or whenever there is reason to suspect nonconformance with the standard.

 
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
Item Oven or other approved heat source
Description Must be maintained at 110 ± 5 C
   
Calibration Item Verify temperature
Calibration Procedure Verify with calibrated thermometer
Calibration Interval 4 months
Item Incidental Equipment
Description Sample container, stirrer (spoon)
   
Calibration Item Check physical condition
Calibration Procedure Visual
Calibration Interval 12 months
   
Reference the following specifications
AASHTO T 2 Standard Practice for Sampling Aggregates
AASHTO T 84 Specific Gravity and Absorption of Fine Aggregate
AASHTO T 85 Specific Gravity and Absorption of Fine Aggregate