According to DIN EN 12664, a single plate apparatus (see fig. 1a) consists of the specimens (PK), which is located between the heating plate (HP) and the cooling plate (KP). The heating plate is covered with a heat insulation (SDP) and is included in addition to the top and to the side of protection heaters (OSP and SSP). This arrangement of the plates heat losses are minimized by a suitable controller to ensure, that the entire power of the hotplate as heat flux flowing through the sample. The structure can have a circular or square cross-section, with the latter from point of view of specimen preparation is better suited.
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