Agilent Technologies G4319A Manual de usuario

Agilent Technologies

TCD-to-FID Series Connection on a

6820 GC, Accessory G4319A

Installation Guide

The TCD-to-FID Series Connector connects output flow from a

Thermal Conductivity Detector (TCD) to the column inlet of a

Flame Ionization Detector (FID) to perform a second analysis of

the same injected sample. Before following this procedure, refer

to safety information at the end of this document.

•Both a TCD and a FID are required to use this accessory. If

an ECD is present, or in a dual FID or TCD situation, the

unneeded detector must be removed and replaced. To

achieve a standard factory configuration, the TCD must be

located in the front detector position.

•If you are installing a new FID at this time, refer to its

installation document.

•If you are installing a new TCD at this time, it is important to

read this document before doing so. Instructions here modify

some TCD installation steps described in its installation

document.

Complete TCD hardware installation through all wiring

connections. Then, when ready to insert the TCD block

assembly into the oven, see “Adjusting Vent Tubing and

Reinstalling the TCD Block" on page 6.

•Do not restore power and gases to the GC, or test its

detectors, until after the TCD-to-FID series connector is

installed.

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2 Installation Guide: TCD-to-FID Series Connection

Parts list

•TCD-to-FID Series Connector assembly

•Swage nuts and ferrules

Tools

•Electrostatic protection such as a grounded wrist strap

•T-20 Torx screwdriver

•7/16-inch wrench

Steps

1Preparing the GC

2Raising the TCD Block

3Adjusting Vent Tubing and Reinstalling the TCD Block

4Installing the TCD-to-FID Series Connector

Installation Guide: TCD-to-FID Series Connection 3

Preparing the GC

1Turn off the detectors.

2Set the oven to 25 °C and turn off all other heated zones.

3Turn off all carrier and detector gases at their sources.

4Turn off the main power switch.

5Disconnect the power cord from the power source. Some

internal parts carry power if the cord is connected.

6Remove the column(s) and any associated hardware from

inside the column oven.

7Lift the hinged GC top cover at its front edge to expose the

detector area. Remove the cover by raising it to vertical,

lifting its left hinge pin from its bracket, and then sliding the

cover to the left to free its right hinge pin.

Perform this procedure only if necessary to add a new detector,

or to remove and replace an existing detector. Remove the

panels indicated in the following steps. Note that if an existing

detector is being completely replaced by a new detector,

carefully store the old detector assembly and all associated

parts in a safe place for possible future use.

1Remove two screws along the lower edge of the left side (flow

control) panel. Slide the panel slightly to the rear and lift it

off.

NOTE Carrier gas flow must be maintained until the column has cooled to avoid

column damage.

CAUTION Electronic components can be damaged by static electricity: use a

properly grounded static control wrist strap when removing the

electronics panel.

4 Installation Guide: TCD-to-FID Series Connection

2In the same manner, remove two screws along the lower edge

of the right side (electronics) panel. Slide the panel slightly to

the rear and lift it off.

3Remove the back panel by removing two screws at its bottom

edge, loosening two screws at its top edge, and the lifting off

the two top screws.

4Finally, remove the rear top cover by removing four screws,

two at each end.

Raising the TCD Block

1Cap the detector base (column/makeup gas adapter

connection).

2Remove the detector thermal cover by removing two screws,

one from each side of the cover.

Installation Guide: TCD-to-FID Series Connection 5

3Cap the vent tube at the top of the detector.

Thermal cover

Insulation

Delta PRT sensor

Vent tube

Heater and PRT

Vent tube support

Retaining screw

Detector base

sensor

6 Installation Guide: TCD-to-FID Series Connection

1Carefully remove the preformed thermal insulation from

around the detector block to expose two screws securing the

block to the oven top. Remove the screws.

2Carefully lift the block just enough to expose the vent tube

support retaining screw.

3Carefully slide the heater/sensor and Delta PRT sensor

cartridges out of the block. Sensors (the small cartridges)

must be handled carefully to avoid breakage.

Adjusting Vent Tubing and Reinstalling the TCD Block

1Once the TCD block is removed from the oven enough to

expose the screw securing the vent tube support, or before a

new TCD block is installed into the top of the oven, remove

the retaining screw securing the vent tube support and

remove the support.

2Carefully bend the vent tube downwards to be alongside the

detector column / make up gas fitting. Align the tube so it fits

into the small slot provided in the oven liner. Reinstall vent

tube support with reversed orientation.

3If installing a new TCD, continue with instructions in the

TCD installation document through all wiring connections.

When finished, continue with instructions below, “Installing

the TCD-to-FID Series Connector" on page 8, in this

document.

CAUTION GC insulation is made of refractory ceramic fibers. Ventilate your work

area. Wear long sleeves, gloves, safety glasses, and a disposable

dust/mist respirator. Dispose of unneeded insulation in a sealed

plastic bag.

TCD vent tube

TCD column or make up gas fitting

Installation Guide: TCD-to-FID Series Connection 7

4Reinstall heater and sensor cartridges into the block. It does

not matter which sensor is placed in either of the two holes

provided.

5Carefully install the detector block, securing it to the oven

top with two screws. While positioning the detector into the

cavity, use insulation to pack around the bottom and sides of

the detector. The goal is to fill all voids around the detector

body as it is placed into the cavity.

6Remove caps from the detector base and from the vent tube.

7Install the detector thermal cover, securing it with its screws.

CAUTION When installing insulation, use care to not plug the vent tube. If flow is

reduced or blocked when the TCD filament is switched on, its life may

be shortened dramatically.

CAUTION Avoid crimping filament and sensor leads when installing the TCD

thermal cover.

8 Installation Guide: TCD-to-FID Series Connection

Installing the TCD-to-FID Series Connector

1Working inside the oven, and following proper swaging

procedures described in the 6820 Getting Started manual,

use the 1/8-inch stainless tubing nut, back ferrule, and front

ferrule to connect the TCD-to-FID jumper tube to the TCD

vent tube. Use two wrenches against each other to avoid

twisting the vent tube.

2Use the 1/4-inch stainless tubing nut and Vespel ferrule to

install the 1/4- to 1/8-inch adapter into the FID.

3Again, following proper swaging procedures, use the 1/8-inch

brass tubing nut, back ferrule, and front ferrule to connect

the TCD-to-FID jumper tube to the FID 1/4- to 1/8-inch

adapter.

TCD vent tube

1/8-inch stainless tubing nut

1/8-inch stainless back ferrule

1/8-inch stainless front ferrule

TCD-to-FID jumper tube

1/4-inch Vespel ferrule

1/4-inch stainless tubing nut

FID 1/4- to 1/8-inch

column adapter

1/8-inch brass front ferrule

1/8-inch brass back ferrule

1/8-inch brass tubing nut

TCD column or make up FID column or column

gas adapter fitting adapter fitting

Installation Guide: TCD-to-FID Series Connection 9

4Restore gas supplies and, following leak test procedures

described in the Maintenance and Troubleshooting manual,

check for leaks, particularly at all new connections.

Notices

No part of this manual may be reproduced in

any form or by any means (including electronic

storage and retrieval or translation into a

foreign language) without prior agreement and

written consent from Agilent Technologies,

Inc. as governed by United States and

international copyright laws.

Manual Part Number

G4319-90000

Edition

First edition, July 2003

Printed in China

Agilent Technologies, Inc.

412 Ying Lun Road

Waigaoqiao Free Trade Zone

Shanghai, 200131 P. R. China

Safety Notices

CAUTION

A CAUTION notice denotes a hazard.

It calls attention to an operating

procedure, practice, or the like that,

if not correctly performed or adhered

to, could result in damage to the

product or loss of important data.

Do not proceed beyond a CAUTION

notice until the indicated conditions

are fully understood and met.

WARNING

A WARNING notice denotes a

hazard. It calls attention to an

operating procedure, practice, or

the like that, if not correctly

performed or adhered to, could

result in personal injury or death.

Do not proceed beyond a WARNING

notice until the indicated

conditions are fully understood and

met.

Agilent Technologies

G4319-90000

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