3 - 5
Ver.1.36
N2
Gas tube
Furnace
Furnace purge gus tube
Furnace purge gas restrictor B
OUT
IN
3.7 Connecting furnace purge gas tube
By streaming an inert gas such as N2 through the furnace purge gas tube (see below), oxygen in the
furnace is purged and temperature sensor and other parts in the furnace is protected from oxidative
degradation. When the furnace is operated at higher than 700ºC, be sure to connect the purge gas
tube to an inert gas source. When the furnace temperature is 700ºC or lower, there is no need to
connect the tube.
3.7.1 Connecting N
2
gas tube
A inert gas line such as N
2
, and connect it to the furnace purge gas tube via the purge gas restrictor
B supplied in the package. In the case where the supply pressure is 500 kPa, there is approximately
100mL/min of gas flow. If air is used, there is no effect of preventing oxidative degradation.
Do not connect flammable gas line such as hydrogen gas. There is a
risk of explosion.
WARNING
!
Do not position the warning label of the furnace purge gas tube over a
high temperature GC oven. The label may be unreadable by thermal
degradation.
CAUTION
!
