HMA-622 Load Ring and HMA-623 Gage Blocks are each NIST Traceable and used together to verify applied loads and height measurement of HM-685 Superpave and HM-687 Brovold Superpave Gyratory Compactors. The 5,000lbf (22.2Kn) Load Ring with dial gauge and individually serial-numbered 3x1in (76x25mm) WxH, hard-steel Gage Blocks verify calibration of the compactors in accordance with the test method and calibration schedule. Load Rings and Gage Blocks are purchased separately. HMA-623 Gage Blocks are sold individually and four are required for verifying.
- NIST Traceable Certification for both models
- Gage blocks are serial-numbered
- 5,000lbf Load Ring (w/ Certification), or
Gage Block (w/ Certification)