Discovery TGA™ Getting Started Guide Page 35
Connecting the Air Cool Line
Use the following steps to install the Cooling Gas line:
1 Locate the COOLING GAS fitting on the back panel of the Discovery TGA, marked with a 140 kPa
gauge (20 psig) warning label.
2 Make sure your compressed air is regulated between 138 to 172 kPa gauge (20 psig) and is free of water
and vapors.
CAUTION: The COOLING GAS line feeds into a pressure relief valve that is set to 140 kPa gauge
(20 psig). The source pressure setting should not go above this value.
MISE EN GARDE: La conduite de refroidissement de l'air alimente une soupape de détente de pres-
sion réglée à 140 kPa (pression manométrique) (20 psig). Le réglage de la pression à la source ne doit
pas dépasser cette valeur.
3 Connect the 1/4-inch O.D. tubing from the compressed air source to the COOLING GAS fitting.
NOTE: The cooling gas flows up through the furnace cavity. If you are analyzing oxygen-sensitive
materials, it is recommended that you use nitrogen as your cooling gas.
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