Thermo Scientific FTIR, User Manual

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Installation
The available gas inputs to the system include the following:
l
Heated Sample Line from the sample point to the FTIR Heated Valve Drawer.
l
Nitrogen (N2) used to clean the gas cell and collect a "zero" background sample. You may also
use filtered, compressed air in place of nitrogen. If you are using filted, compressed air, use a filter
that was designed for FTIR use.
l
Optional Span 1 and Span 2 valve positions for span or calibration gas samples.
Gas lines are connected to the FTIR Heated Valve Drawer with Swagelok™ tube fittings.
1. Connect the Heated Sample Line (HSL)
A heated sampling line (HSL) (typically 2 -3 meters in length) connects the sample site to the
FTIR gas cell.Connect the HSL using the standard Swagelok fitting on the rear panel of the
drawer.
Figure 3-4: The Heated Sample Line (HSL) and control box.
a. Fully insert the tubing into theSAMPLE IN fitting.
b. Rotate the nut clockwise until finger tight.
c. Using a wrench, tighten the nut 1¼ turns. Do not over tighten.
d. Connect the round black cable from the HSL to the power control box.
24 Modular Gas System User Guide Thermo Scientific