Agilent Technologies G1574A User manual

Installation Guide
Split/Splitless Inlet with Manual Pneumatics Control on 6890 GC
Accessory G1574A

Agilent Technologies, Inc.
2850 Centerville Road
Wilmington, DE 19808-1610
USA
© Agilent Technologies 2001
All Rights Reserved. Reproduction,
adaptation, or translation without
permission is prohibited, except as allowed
under the copyright laws.
Part number G1574-90307
First Edition, APR 2001
Replaces Part No. G1574-90300, Installation
Guide, Split/Splitless Inlet with Manual
Pneumatics Control.
Printed in USA
Safety Information
The Agilent Technologies 6890 Gas
Chromatograph meets the following IEC
(International Electrotechnical Commission)
classifications: Safety Class 1, Transient
Overvoltage Category II, and Pollution
Degree 2.
This unit has been designed and tested in
accordance with recognized safety
standards and designed for use indoors. If
the instrument is used in a manner not
specified by the manufacturer, the
protection provided by the instrument may
be impaired. Whenever the safety protection
of the Agilent 6890 has been compromised,
disconnect the unit from all power sources
and secure the unit against unintended
operation.
Refer servicing to qualified service
personnel. Substituting parts or performing
any unauthorized modification to the
instrument may result in a safety hazard.
Disconnect the AC power cord before
removing covers. The customer should not
attempt to replace the battery or fuses in
this instrument. The battery contained in
this instrument is recyclable.
Safety Symbols
Warnings in the manual or on the
instrument must be observed during all
phases of operation, service, and repair of
this instrument. Failure to comply with these
precautions violates safety standards of
design and the intended use of the
instrument. Agilent Technologies assumes
no liability for the customer’s failure to
comply with these requirements.
WARNING
A warning calls attention to a condition or
possible situation that could cause injury to
the user.
CAUTION
A caution calls attention to a condition or
possible situation that could damage or
destroy the product or the user’s work.
Indicates a hot surface
✧Indicates earth (ground) terminal
Sound Emission Certification for Federal
Republic of Germany
Sound pressure Lp < 68 dB(A)
During normal operation
At the operator position
According to ISO 7779 (Type Test)
Schallemission
Schalldruckpegel LP < 68 dB(A)
Am Arbeitsplatz
Normaler Betrieb
Nach DIN 45635 T. 19 (Typprüfung)

Overview
1
Overview
This section reviews the procedure for installing a nonEPC split/splitless
inlet on an Agilent 6890 Gas Chromatograph (hereafter referred to as the
GC). Before you begin, review the safety information found on the inside of
the front cover.
A G1585A must be installed prior to this installation.
Parts List
• One nonEPC split/splitless inlet
• Two machine screws (M4 ×12 mm long)
• Two hex nuts with lockwashers
• Three pieces of insulation
•Onelowerinsulationcover
• One split/splitless label plate
Required Tools
• 7-mm nut driver
• T-20 Torx screwdriver
Steps
1. Preparing the GC
2. Installing the inlet
3. Installing the flow manifold
4. Installing the insulation cup
5. Restoring the GC to operating condition

Overview
2
Heater/sensor wire
Split/splitless inlet
Flow label plate
Manual flow controller
Power switch
Chemical filter

Preparing the GC
3
Preparing the GC
WARNING Hazardous voltages are present in the mainframe when the GC power cord is
plugged in. Avoid a potentially dangerous shock hazard by unplugging the
power cord before removing the side panels.
1. Turn off the GC and unplug the power cord.
2. Remove the injection port cover. Loosen the five captive screws with a
T-20 Torx screwdriver until you are able to lift off the cover.
or
Remove the tray mounting bracket by loosening the six screws at the top
of the bracket and the two screws on the left side of the GC and lifting it
off.
Injection port cover
Tray mounting bracket
Fan cover
Left side cover

Preparing the GC
4
3. Remove the fan cover.
a. Loosen the screw on the right side of the fan cover.
b. Slide the cover to the right to disengage it from the left mounting
post.
c. Lift the cover up and off.
4. Remove the left side cover. Loosen the two captive screws and lift it off.

Installing the inlet
5
Installing the inlet
1. From the front of the instrument, locate the inlet chassis.
2. Remove the round metal cutout in the front or back inlet position, if
necessary. Insert a screwdriver blade into the slot in the cutout and
move it back and forth until the cutout breaks free from the sheet metal.
3. Remove the die-cut insulation plug from the front or back inlet position,
if necessary.
Inlet chassis
Front
Back
Insert screwdriver here

Installing the inlet
6
4. Carefully remove the scribed circle of insulation from the oven top to
create an opening into the oven, if necessary.
Method 1: Use a sharp knife to cut out the insulation using the scribed
circle as a guide.
Method 2: Pierce the insulation with a screwdriver. Rotate the
screwdriver around the scribed circle to remove excess insulation.
Clean up any pieces of insulation that fall inside the oven.
5. Place the inlet in the front or back position so that the large nut and the
heater/sensor cable are in the troughs in the inlet chassis and the three
captive screws line up with the holes in the oven top. Tighten each
screw once with the T-20 Torx screwdriver until the inlet is properly
aligned. Tighten each screw again until snug.
Heater/sensor cable
Large nut
Heater/sensor trough
Large nut trough

Installing the inlet
7
6. From the left side of the GC, locate the heater/sensor wire and its
corresponding connector. Tuck the heater/sensor wire underneath the
clip at the side of the GC and connect it to the nearest square connector.
= Heater/sensor cable routing
Front inlet connector
Back inlet connector

Installing the flow manifold
8
Installing the flow manifold
1. If you are installing an inlet in the back position, remove the flow bezel
bracket. Remove the hex nut at the bottom of the bezel support bracket
using a 7-mm nut driver. Set it aside.
2. Remove the flow-control label plate from the inlet front or back position
on the flow bezel. The plate is glued in place and is removed by pushing
through the openings in the back of the flow bezel and then pulling off
the loosened plate.
Push here