Cooling Gas Line - TA DISCOVERY DSC2500 Getting Started Manual

CAUTION: Corrosive gases cannot be used with this instrument.
MISE EN GARDE: Des gaz corrosifs peuvent être utilisés avec cet instrument.
WARNING: Use of flammable or explosive gas as a purge gas is dangerous and is not recom-
mended for this instrument.
AVERTISSEMENT: L'utilisation d'un gaz inflammable ou explosif comme gaz de drainage est
dangereuse et n'est pas recommandée pour cet instrument.

Cooling Gas Line

The Cooling Gas port is used with the Finned Air Cooling System (FACS) and sub-ambient coolers. The
FACS requires a source of compressed air, while sub-ambient coolers require a source of dry nitrogen in
order to prevent condensation when the cell cover is open. Follow these instructions to connect the
appropriate cooling gas line.
1 Locate the Cooling Gas fitting on the back panel of the Discovery DSC, marked with a 172 kPa gauge
(25 psig) warning label.
2 Make sure your gas source is regulated to 138 kPa gauge (20 psig) when using the FACS. Excessive
tubing length between the pressure regulator and the Cooling Gas inlet will result in reduced cooling
capacity. For details on the pressure required for the RCS, see the appropriate Getting Started Guide.
CAUTION: The Cooling Gas line feeds into a pressure relief valve that is set to 170 kPa gauge
(25 psig). The source pressure setting should not go above this value.
MISE EN GARDE: La conduite du gaz de refroidissement alimente une soupape de détente de pres-
sion réglée à 170 kPa pression manométrique (25 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 gas source (compressed air for the FACS or dry nitrogen for
the sub-ambient coolers) to the Cooling Gas fitting.
Discovery DSC™ Getting Started Guide Page 30