Agilent Technologies 6890 Series Service Manual page 283

330 Thermal Conductivity Detector (TCD)
Replacement procedures
9. Connect the ribbon cable to the mating connector on the pneumatics
board. Arrange the cable to keep it away from the valves and keep it from
being pinched between board components and the manifold.
For the back detector, you may want to loosen the manifold and slide it
out of the carrier a few centimeters to connect the cable to the pneumatics
board. Then, reinstall the manifold.
10. Using a pair of needle-nosed pliers, remove the appropriate top rear panel
detector cutout for the TCD. Also remove any cutouts needed to access
other manifolds or accessories installed in the GC. See Figure 330-17.
Front detector
Auxiliary
Left most screw slot
Back detector
Figure 330-17
11. Place the new top rear panel on its left-most mounting screw. Use the
screw as a hinge and angle the panel while sliding each manifold ID tag
through its cutout in the panel, working from left to right. When all the
tags are through the panel, finish installing the panel on the GC.
12. Install the RFI shield, the pneumatics cover, and the detector top cover.
13. Connect the source gas lines to the manifold. See Figure 330-18.
20 of 24
Top rear panel cutouts
Detectors
Agilent 6890 Gas Chromatograph Service Manual
Insert tip of
pliers here
Back inlet
Front inlet
Jun 2001