Carrier Gas And Calibration Gas Line Connections - ABB NGC8200 User Manual

4.5.5

Carrier gas and calibration gas line connections

The following procedures describe the steps for connecting the external carrier gas and calibration gas
lines from the respective regulators to the feed-through assembly on the analyzer. They are applicable
for both a meter run and an environmental enclosure installation. These instructions assume that the
regulators and gas cylinders have previously been installed.
Materials:
 Installed carrier gas pressure regulator
 1/16 inch SST chromatography grade transport tubing (amount to be determined by the
technician based on the distance from carrier gas cylinder regulator to the sample input filter)
 Installed calibration gas pressure regulator
 1/16 inch SST chromatography grade transport tubing (amount to be determined by the
technician based on the distance from the calibration gas cylinder regulator to the sample
input filter)
 Four 1/16" ferrules and nuts
 Two ¼ inch NPT to 1/16 inch reducers or other size as determined from the carrier/calibration
gas regulator
To connect gas lines:
1. Locate the carrier gas input port (CAR) on the feed-through assembly (see
2. Locate the ¼ inch low pressure output fitting on the installed pressure regulator.
3. Measure and cut the 1/16 inch SST tubing to the required length.
4. Make the necessary bends in the tubing to ease the installation of the tubing into the analyzer
and pressure regulator.
Figure 4-21: Carrier and calibration gas connections
IMPORTANT NOTE: Tube, ferrule and nut should always enter the connection at a right angle.
5. Install the reducer into the carrier gas regulator.
6. Insert the tube with the ferrule into the reducer/pressure regulator output fitting. Move the nut
down onto the ferrule, screw onto the fitting and tighten.
7. Carrier gas pressure should be set at 90 PSIG.
8. Remove the sealing screw from the carrier gas input.
NOTICE – Equipment damage. Leave the sealing screw in any unused ports. If unused
stream ports are not sealed, moisture can enter the manifold which can damage the
instrument and void warranty.
9. Purge the air from the transport tubing by opening the shut-off valve located on the regulator.
10. Insert the tube with the ferrule into the carrier gas input port (CAR) on the feed-through
assembly. Move the nut down onto the ferrule, screw into the port and tighten.
11. Determine the input port for the calibration gas on the feed-through assembly and remove the
sealing screw. Any stream can be used for calibration gas, but typically S4 is used.
21 01 51 0MN A H | NG C 82 0 0 A N D P GC 10 00 US ER MA NUA L | 3 9
Figure 4-21).