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ffTA GRIM®3 Glass RI Measurement
The ffTA GRIM® system can be used to identify and group fragments of glass through the determination of a samples refractive index using the standard oil immersion/temperature variation technique. Using GRIM®, repeat measurements produce results with a standard deviation of, typically, 0.00002RI over a 5 hour period and 0.00003RI over a 5 day period. The system can monitor up to four glass fragment edges per operation, speeding the casework examination process, giving improved statistical accuracy and reducing calibration time. Casework measurements are filed, password protected, with the essential information that identifies each fragment of glass examined, including for example its source, casework reference, and operator identity. Basic statistics are generated including average, range, spread and standard deviation. Results may be displayed as scatter diagrams and formatted for exportation to Microsoft Office for additional analysis.
Features include:
Additional Applications:
Glass Fragment Analyser Now supplied as standard with the ffTA GRIM®3, that provides an interpretation tool to assist forensic experts in evaluating the results of glass RI measurements. The software includes two grouping algorithms and two match test options providing the examiner with the flexibility to select the most appropriate approach for their lab's quality requirements.
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