User`s guide

NOTE: Use a clean sample tube that does not contain a sample for
the set-up procedure. The sample tube should contain the
type of packing material that will typically be used for your
applications.
2. When the TD is in Ready mode, open the Tools menu
and select Maintenance.
3. Select IS Tube Load.
4. The ATD will load the tube from position #1 into the
sampling position to complete the carrier gas path. Once
the tube is loaded, the heated valve is rotated, and the
solenoid valves, which control the flows, are opened.
5. To set the tube load flow, connect the flowmeter to the
Tube Load vent. Adjust the Tube Load needle valve to
obtain the required flow. Typical flow rates are in the
order of 20 to 100 mL/min. Set the tube load flow rates
so that you obtain the desired concentration of sample
on your sample tube.
6. Press the Stop button to close the solenoid valves, return
the heated valve and the IS valve to their original
positions, and in the case of the ATD, return the sample
tube to the carousel.
7. Disconnect the flowmeter from the Tube Load vent.
Figure 60 Location of Needle Valves
Needle Valve