Agilent Technologies G3485A User manual

Agilent Technologies
Agilent G3485A Third Detector Box
For the Agilent 7890A Gas Chromatograph
Installation Instructions
Parts Supplied
Table 1 Parts supplied
Description Quantity
Third detector box assembly 1
Flow module back-up plate 1
Screw, M4 × 0.7 25mm (2-for flow frame top, 1-for flow module backup plate) 3
Screw, machine, M4 × 0.7 12mm (4-for flow frame bottom, 3- for flow module
backup plate)
7

2Installation Instructions
Agilent G3485A Third Detector Box
Tools Required
•T-20 Torx drivers
Installation Procedure
This procedure explains how to install the third detector box on the Agilent
7890A Gas Chromatograph (GC).
Prepare the GC
1Turn off the GC and unplug the power cord.
2Unsnap the pneumatics cover by pressing the black clips on the sides of the
cover. Lift the cover up and off.
3Remove the left side cover by loosening the two top screws, sliding the
panel towards rear, and lifting the cover off. This cover and fastening
screws will no longer be used when the G3485A Third Detector Box is
installed on the GC.
Remove the 3rd detector box side cover
1Remove the two M4 x 0.7 10mm long flathead screws from the bottom of the
3rd detector box side cover.
2Remove the cover by lifting it off. Save the cover and screws to reattach the
cover when the new equipment is installed inside the box. Do not plug in
the GC without the box side cover plate installed.
Optionally install the flow module back-up plate
Please skip this section unless you are adding a manual flow regulator in
the upper position of the third detector box. This bracket can interfere with
the installation of other Agilent accessories.
1Carefully remove the gray label plate covering the regulator opening in the
top front location of the plastic bezel. Try using your thumb to push out the
label from the regulator opening of the plastic bezel inside the detector box.
2Place the flow module back-up plate at the top inside regulator position of
the plastic bezel and secure with (3) M4 x 12mm screws through the bezel.
This installation is similar to the factory installed back-up plate at the lower
regulator position in the bezel.
WARNING Refer to the Safety Manual that came with your Agilent 7890A Gas
Chromatograph for hazards that may exist when maintaining your
instrument.

Agilent G3485A Third Detector Box
Installation Instructions 3
3Attach the side bracket of the flow module back-up plate to the stand-off
using an M4 x 25 mm screw.
4Attach the previously removed gray label plate to the front bezel.
Attach the third detector flow frame
1Orient the third detector box with the GC by positioning the circular
cutouts at the bottom edge of the frame with the four screw holes at bottom
edge of the GC.
2Using a Torx driver, attach the frame first with two M4 × 0.7 × 25mm long
screws at the top edge of the frame and then with four M4 × 0.7 × 12mm
long screws through the circular cut outs at the bottom edge of the frame.
Figure 1 Third detector flow frame mounted to GC
Restore the GC to operating condition
1Install the third detector side cover using two M4 × 10mm long Torx
flathead screws.
2Replace the top panel.
3Plug in the GC and turn on the power.
M4 x 25 mm top
screw locations
M4 x 12 mm bottom
screw locations

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Warranty
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in future editions. Further, to the maximum extent permitted by applicable law, Agilent disclaims all warran-
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©Agilent Technologies, Inc. 2007
Printed in USA and China
First edition, July 2007
Agilent Technologies, Inc.
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Wilmington, DE 19808-1610 USA