User`s guide

Installation and Setup
70
should be installed at every gas line connection. The carrier gas
connections require 1/8” tubing with 1/8” parallel compression
fittings.
Oxygen filters (N930-1179), moisture filters (N930-1193) and
charcoal filters (N930-1192) are recommended for carrier gas lines.
When these filters are used together, they should be installed in the
gas line in the following order: gas cylinder, hydrocarbon filter,
moisture filter, oxygen filter and TD.
If you use filters from other suppliers, refer to the installation notes
that are supplied by the manufacturers.
Gas Supply Specifications
If the ATD/TD is fitted with the liquid nitrogen accessory (LN2), it
requires a pressurized Dewar flask with a relief valve set at 25 psig
(175 kPa) and terminating in a ¼” Swagelok® connection. It also
requires a pressure relief valve set at 50 psig (350 kPa) in the pipe
between the Dewar flask and TD. Refer to the installation guide of
the LN2 accessory for detailed instructions.
Dry air is used to drive the pneumatic systems and to purge the cold
trap. Use extra-dry air with a dew point less than -50°C.
WARNIN
G
Observe proper handling procedures for compressed gas
cylinders. See Handling Compressed Gases on page 25.
Check the gas lines and connections regularly for leaks.
Carrier ATD/TD carrier gases require a minimum purity
of 99.995%. Carrier gas with a purity of
99.999% is required if you are using a
TurboMass or ElCD detector on your GC.
To avoid trap icing and potential trap damage,
ultra-dry helium or nitrogen must be used as a
carrier.