HP 6890 User Manual

Installing the Flame Ionization Detector EPC Flow Control Manifold

The FID EPC Flow Control Manifold kit can be used to replace any HP 6890 Series FID EPC flow control manifold. This kit contains:

Kit G1531-60720 Qty.

FID EPC flow control manifold 1

Mounting bracket, HP 6890 1

Top rear panel 1

Installation sheet (this document) 1

Blank label 1

Hex nut, 7/16 inch 3

Gang fitting installs here

Ribbon cable

ID tag

FID EPC flow control manifold

Blank label

HP 6890 mounting bracket

Figure 1 FID EPC flow control manifold replacement kit

Slot for label tag

7/16 inch hex nuts

Top rear panel

Tools required

7/16 inch open-ended wrench

T-20 Torx driver

Needle-nosed pliers

Safety information

Before continuing, read the safety information in your GC Operating Manual.

Removing the existing manifold

WA R NI N G Hydrogen gas is flammable and potentially explosive. Before replacing the

manifold, turn off the hydrogen gas at the source.

WA R NI N G Before proceeding, turn off the oven and any heated zones and let them cool

down. Turn off all detector gases at their supply, then turn off the main power switch and unplug the power cord.

1. Remove the pneumatics cover and the RFI shield under it. See Figure 2.

Pneumatics cover

RFI shield

Figure 2 Back view of HP 6890

Top rear panel

2. Remove the gas supply tubing from the present manifold. See Figure 3.

Disconnect gas lines

Manifold, installed before May 1998

Figure 3 Remove the gas connections

3. Remove the detector cover and the top rear panel.

4. Remove the Torx T-20 mounting screw from the front of the manifold. See Figure 4.

Figure 4 Removing the detector flow manifold

5. Disengage the detector tubing from the slots in the chassis so that the gang fitting on the manifold can be removed easily. See Figure 4.

Manifold, installed after May 1998

Torx T-20 screws

holding detector manifolds

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