Ames profilograph manual

profilograph has a long history of service, but the use of lightweight inertial profilers has become increasingly common in the last two decades. The (Image source: GOMACO, AMES) Profile Index The Profile Index (PI) is a commonly used smoothness statistic for pavements. Traditionally based on the results of the profilograph, it can also. The profilograph trace (profilogram) shall be identical to the reference trace when viewed on a light box. A rotating calibration wheel may also be used. The scale is Documented testing done by independent government agencies have shown that the Ames Profiler provides accurate and repeatable comparisons to true rod and level profile. Studies have also shown excellent correlations to the “California-style” profilograph. All our Lightweight Profilers meet or ex ceed the following requirements.

profilograph shall be assembled and operated according to the manufacturer's specifications. Before a pavement surface profile is measured, the profilograph shall be inspected by the Engineer or his representative to determine its mechanical condition. Calibration, horizontal—The Engineer or his representatives should check the. Two basic profilograph models are in use: the California profilograph (see figure 1) and the Rainhart profilograph. The California profilograph uses between four and twelve wheels mounted on a ft (m) frame, whereas the Rainhart device uses twelve support wheels evenly spaced along a ft ( -m) frame at offsets up to 22 inches ( International Ride Index, the main calculation that Profilers do, actually measures the roadway better than Profilographs. This is because Profilographs, being a physical beam, have very odd responses to different feature lengths. Take a look at this plot of a Profilograph’s response: (source: FHWA Report FHWA-HRT, October ) Notice.

Manual Interpretation of Profilograph Trace. Two smoothness measuring devices, California Profilograph and Ames Lightweight. The names of those individuals on the Technical Panel are as allowing the use of the California profilograph for new airfield pavement acceptance. ing processes, quality assurance manual creation and updates, specifications, sampling procedures and California Type Ames Profilograph-calibrated and.