User`s guide

Installation and Setup
73
See Handling Compressed Gases on page 25.
2. Connect a clean, high purity, two-stage regulator with a
stainless steel diaphragm to the carrier gas tank. The
regulator should also have a 1/8”, parallel, compression
fitting with which to connect the regulator to the TD.
The delivery pressure must be adjustable to 90 psig (620
kPa).
NOTE: The regulator must be absolutely clean and free from any
oil or other contamination.
3. Connect filters that are required as close as possible to
the TD.
4. Connect the supply line to the ATD/TD Carrier In port.
Use copper or stainless steel tubing only. Securely
tighten all fittings.
5. Open the tank and set the delivery pressure to 90 psig
(620 kPa). The carrier gas delivery pressure must not
exceed 100 psig (690 kPa), and it must be sufficient to
maintain the required column head pressure at the gas
chromatograph.
A high purity regulator is not essential for the dry air, as this gas
does not come into contact with the sample. A brass regulator will be
suitable. Use copper tubing to connect the regulator to the ATD or
TD. If you are using Teflon tubing, ensure the lines can withstand
pressures of 100 psig (690 kPa).
NOTE: If you are running more than one instrument from a single
supply of dry air, you must ensure that your supply system
can deliver a minimum of 3 liters per minute at 70 psi for
each instrument under all sampling conditions.
To connect the dry air supply to your instrument:
1. Connect a clean, two-stage regulator to the dry air tank.
The regulator should also have a 1/8”, parallel,
WARNIN
G
Do not set the delivery pressure higher than 100 psig
(690 kPa).