TA DHR Series, Getting Started Manual

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DHR/AR Series Environmental Test Chamber Getting Started Guide Page 9
ETC Components
The ETC chamber is mounted onto a metal plate that is secured to the back of the rheometer. The DHR
ETC has dowel pins for alignment that also provide support while the unit is secured in place. Handles at
the bottom of each door are provided for lifting and positioning.
The oven is made up of two halves (left and right as viewed from the front), with each half containing a
specially designed heating element with a thermocouple welded to it (see
Figure 2 ). Various interlock
devices are fitted for safety purposes. These devices detect the position of the doors. The Status Bar in
TRIOS software reports the current state:
open , partly open , or closed . Temperature control is only active
when the doors are closed. Note: You will not be able to move the head up unless the doors are fully open.
Figure 2 ETC interior, left and right sides.
The left-hand door also incorporates the gas ring, which allows stirring air and liquid nitrogen to be fed
into the chamber. The control electronics are contained within the main electronics of the ETC.
Insulation Thermocouple Heating coil Thermocouple Heating coil
Gas ring Torsion/Rectangular
geometry thermocouple Light or optional camera