By providing gas flow from a carrier gas such as high purity helium or nitrogen through the desorption tubes and needles while conditioning, it can be assured that no oxygen enters the GLT desorption tube which could destroy the adsorbent material. Impurities from the inside of the desorption tubes and needles are flushed through. Needles Two types of handles are included with the Conditioning System. Six desorption tube handles are included for the conditioning of the desorption tubes and two desorption needle handles are included for the conditioning of desorption needles. Each of the handles consists of a stainless steel hollow center shaft with a Teflon insulated handle.
Additional handles are also available.
Graphite seals with metal inserts are used for sealing the desorption tubes to the desorption tube handles, due to their high temperature properties up to the maximum 350 degrees C temperature limit of the system. Other seals could be used at lower temperatures. An external high temperature reset switch is located on the rear of the Oven so that if temperatures exceed 350 degrees C on the heater block, the external reset will open and heat to the block will cease. This switch can be reset by simply pushing in the button once the block has cooled sufficiently. Two slo-blow fuses are mounted on the rear of the Conditioning System, one for the main power and one for the heater circuit.