Section 3: Testing Equipment
CST/M&P will qualify district laboratory testing equipment used for IA sampling and testing, according to the "Laboratory Qualification Program."
The district laboratory will qualify all other department testing equipment and AASHTO accredited commercial laboratory equipment used for IA sampling and testing. (Note: Any commercial laboratory used for IA sampling and testing must be AASHTO accredited.)
Qualify testing equipment according to these guidelines:
- frequency for qualifying IA sampling and testing equipment will not exceed one (1) year
- calibration/verification is required whenever the laboratory or equipment is moved
- IA equipment shall be other than that used for performing verification or quality control (QC) testing.
Any equipment used to perform verification and/or QC sampling and testing in making an acceptance decision will be evaluated by IA sampling and testing personnel. This evaluation includes calibration checks and split or proficiency sample tests. The requirements for, and frequency of, equipment calibrations are shown in TxDOT’s test procedures, as referenced in 'Calibration Standards and Frequencies for Laboratory Equipment.' Acceptable tolerance limits for the comparison of test results from split or proficiency samples are shown in "Acceptable Tolerance Limits for Independent Assurance."