Agilent Technologies G4319A User manual

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
© Agilent Technologies, Inc. 2003
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