User`s guide

Installation and Setup

Use only carrier gases with a purity of 99.995% or better. Only top

quality gases are suitable; typical laboratory supplies are usually not

pure enough for thermal desorption. Gas purity can be improved

when filters are included in supply lines. Hydrocarbon, oxygen and

moisture filters are recommended for carrier gas lines.

Figure 13 Connect Filters to the Gas Supply System

When oxygen filters and moisture filters are used together, install

them in the gas line in the following order: gas cylinder, hydrocarbon

filter, moisture filter, oxygen filter, and TD. This sequence prevents

any hydrocarbons present in the gas stream from reaching the

oxygen filter.

Most filters are disposable. Replace them when a new cylinder is

installed or as soon as contamination is suspected.

The TurboMatrix 300 TD, TurboMatrix 350 ATD and the

TurboMatrix 650 ATD instruments have separate gas connections

for tube and trap desorb. This allows you to use different gases (He,

or N

). If you wish to use the same gas for both the trap and

desorb sue the connection N671-0105 provided with the shipping

kit.

To connect carrier gas to your system:

NOTE: Ensure that carrier gas is connected to the instrument

before powering on the instrument.

1. Locate all carrier and dry air tanks in a secure location.

WARNIN

Ensure the pressure rating of the filters has not been

exceeded.

Moisture

Filter

Oxygen

Filter

Charcoal

Filter

Carrier

Gas

Cylinder