Agilent Technologies G1574A Manual de usuario

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

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

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

Heater/sensor wire

Split/splitless inlet

Flow label plate

Manual flow controller

Power switch

Chemical filter

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.

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

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

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

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

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

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

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