Specimen, mounting systems

Brennan, P., Fedor, G., and Robert, R. (2002). Xenon Arc Exposure Results rotating and static specimen mounting systems compared. 5 International Symposium on Weatherabilitv. Kogakuin Uni verity.. Japan. Oct. 2002. 

The specimen chamber (or target chamber) may contain a number of samples and standard specimens mounted on the same sample holder. Also here are the X-ray detection system and a Faraday cup which monitors the proton current incident... 

The specimen is in the form of a 25 pm thick foil. Three mounting systems have been used ... 

The system shown in Fig. 26.47 has a vertical z movement of 1(W mm to facilitate specimen mounting and spiral scanning and a lateral x movement of —40 mm for specimen alignment. It has... 

This test measures the specific optical density of smoke generated by a specimen mounted vertically in a smoke density chamber. A photometric system is used to measure varying light transmission as smoke accumulates from exposure of specimens to the flaming and nonflaming conditions. 

The basic exposure rack is typically 5 feet by 12 feet, and consists of a support framework, with the specimen mounting hardware on top. There are two basic mounting systems one for flat, rigid, self-supporting panels and another for three-dimensional products, parts or components. 

The slatic-array s three lamp irradiance control system and flat exposure area allow simplified specimen mounting. 

The metal electrode to be studied must be carefully prepared, attached to an electrical lead and mounted so that a known surface area of one face is presented to the solution. Several procedures are used such as mounting in a cold setting resin (Araldite) or inserting into a close-fitting holder of p.t.f.e. In the case of metal-solution systems that have a propensity for pitting care must be taken to avoid a crevice at the interface between metal specimen and the mounting material, and this can be achieved effectively by mounting the... 

Specimen stage in single-or multiple-sample configurations accepts mounts from the Introduction system and positions them for analysis. 

Closed cabinet tests and their operation may be likened to a small lire burning in a closed room. The specimen is decomposed by a heat source and the resulting effluent accumulates within the cabinet. The decomposition system is either mounted within the cabinet as in the aircraft50 and maritime tests51 or may be outside, connected to the cabinet by a short duct, as in ASTM E 1678.52... 

ASTM E 2573 Standard Practice for Specimen Preparation and Mounting of Site-Fabricated Stretch Systems to Assess Surface Burning Characteristics... 

Hexagonal-lath-shaped crystals (Na-ZSM-5) are always obtained from the organic-free system, whereas sphere-like or crossed-discus (twinned) crystals (TPA-ZSM-5) are easily formed in the system containing TPABr (Figure 3). From XRD measurements of the lathshaped Na-ZSM-5, certain peak intensities were found to be sensitive to the manner of mounting the specimen onto an X-ray sample holder. 

Apparatus. The experiments were performed in a vacuum system consisting of a preparation chamber and an analysis chamber separated by a gate valve. The preparation chamber was pumped by a 150 1/s turbo pump to a base pressure of lxl0 mbar. A quadrupole residual gas analyzer (RGA) was connected to the pumping line of the chamber. It did not have a direct line-of-sight to the specimen. Gases could be admitted to the chamber as desired through a variable leak valve. In the preparation chamber, the specimen could be mounted in a heatable support where it could be irradiated with an electron gun. A transfer device allowed the specimen to be moved to the analysis chamber without exposure to air. 

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