This FAQ article clarifies whether the TotalView 360° Auto Rotator for the Agera L2 complies with ASTM D6290 “dump-and-pour” pellet measurement procedures, and to explain how the Auto Rotator enhances statistical confidence through improved repeatability (sᵣ), reproducibility metrics (r ≈ 2.8 · sᵣ), 95% confidence intervals, and data-driven Pass/Fail decisions.

Important Notes:

FAQ: Does the Auto Rotator Accessory comply with the ASTM D6290 “dump-and-pour” method for plastic pellets?

A: No — the TotalView 360° Auto Rotator Accessory for Agera L2 does not replace the ASTM “dump-and-pour” procedure itself (i.e., multiple fills of pellets with replacement between measurements). However, it enhances the intent of the standard by statistically characterizing variability within a single sample presentation and greatly improving the confidence and interpretability of that measurement.

How the Auto Rotator enhances ASTM-based measurement

The Auto Rotator uses automated 360° rotational sampling to provide standards-based statistical outputs, including:

• Repeatability (sᵣ): The accessory automatically calculates the repeatability of a rotational dataset — the within-sample variability measured during the rotation cycle.

• Reproducibility metric (r ≈ 2.8 · sᵣ): Based on ASTM E177 statistics, a reproducibility estimate (r) is derived from sᵣ to give context for how much variance to expect between labs or sessions under consistent conditions.

• Mean color values: The system computes a true averaged color from up to 72 orientations (5° increments), reducing the impact of directional or heterogeneous reflectance.

• 95% Confidence intervals: TotalView reports confidence intervals around the mean color to show the statistical certainty of the measured average.

• Pass/Fail decisions with statistical certainty: With mean values and confidence data computed using ASTM-style statistics, the system enables more robust Pass/Fail decisions with quantified uncertainty rather than single-angle snapshots.

What this means for pellet measurement

• The “dump-and-pour” method in standards like ASTM D6290 calls for multiple measurements with sample replacement to account for non-uniform and particulate samples — a technique that remains valid and necessary for batch averaging. 

• The Auto Rotator adds another layer of sample presentation by capturing directional variation around the entire sample circumference and applying ASTM-aligned statistical treatment.

• In practice, combining rotational statistical averaging with multiple dumps/fills will yield the most statistically robust characterization for pellets, but the Auto Rotator alone does not replace the procedural steps in ASTM methods.

In summary:

The Auto Rotator enhances ASTM-aligned metrics (repeatability, reproducibility, confidence intervals, and statistically supported Pass/Fail decisions), but it is not itself a substitute for the full “dump-and-pour” sampling technique specified by ASTM for pellet samples.