Trace Gas Sampling Kit Installation Instructions

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Instructions for the trace gas sampling kit.

The 8100-664 Trace Gas Sample Kit is designed for use with either the LI-8100A or the LI-6400XT. This page provides assembly instructions for using the kit with the LI-8100A Soil CO2 Flux System.

Assembly Instructions

Tools Required: 9/16 inch or adjustable wrench

Time Required: approximately 5-10 minutes

Kit Components:

  • Tubing with quick-connect fittings (2 pieces)
  • Modified Swagelock® T-fitting
  • 6 Septa (part number 300-08998)
  • 5 sets of ¼” ferrules (2 pieces per set, part number 300-05375)
  1. Remove the brass nuts from the Swagelok® T-fitting.
  2. Locate the tubing with quick connects for the LI‑8100/LI-8100A (shown below) and two sets of Swagelok® 1/4 inch ferrules (two pieces per set, p/n 300-05375).
  3. Install a brass nut on each of the tubing assemblies then install one set of ferrules on each tube assembly as shown.
  4. Note that the orientation of the smaller piece of the ferrule set is important since it has a beveled side which seats into the large piece. When installed, the end of the tube should extend approximately 1/8 inch (3 mm) beyond the ferrules.
  5. Install the septum (p/n 300-08998) in the remaining nut. The septum has a self-sealing plastic coating on one side of the silicone disk (identified by the glossy coating). For optimum sealing, the septum should be installed with the glossy side facing the T-fitting, and the non-glossy side facing out.
  6. Assemble the T-fitting with the septum-containing nut on the “leg” of the T and the tubes on the “arms” of the T. Tighten the nuts, but do not over-tighten since this will create leaks around the septum and ferrules.
  7. Install the assembly in line between LI-8100A and the flux chamber.