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Flame Ionization Detector on a 6820 GC,
Accessory G4312A
Installation Guide
This installation guide provides procedures for installing a
Flame Ionization Detector (FID) on an Agilent 6820 Gas
Chromatograph (GC). Before following these procedures, refer
to safety information at the end of this document.
Parts list
Description
Quantity
T-20 Torx screw M4
1
1/8-inch front ferrule brass
3
1/8-inch back ferrule brass
3
Nut 1/8-inch brass tubing
3
Cable tie 100 × 3 mm
4
Nut warmer cup assembly
4
Nut warmer insulation (19234-60715)
3
Nut warmer insulation (G1176-01006)
1
Micro switch cable assembly
1
FID sticker - English
1
FID sticker - Chinese
1
FID body
1
FID interface board
1
FID ship kit
1
Agilent Technologies
Tools
• Electrostatic protection such as a grounded wrist strap
• T-20 Torx screwdriver
• Diagonal cutter
• 7/16-inch wrench
Configuration considerations
To achieve a standard factory configuration, it may be
necessary to move an already existing detector. For a
two-detector configuration, factory placement rules are as
follows:
• A thermal conductivity detector (TCD), if present, is always
placed in the front location.
• An FID, if present, is always placed in the back location.
Steps
1 Preparing the GC
2 Positioning and Securing the Detector
3 Connecting the Detector
4 Installing the Flow Control Module
5 Installing the Ignitor Extension Cable
6 Installing the Insulation Cup
7 Restoring the GC to Operating Condition
2
Installation Guide: Flame Ionization Detector (FID)
Preparing the GC
WA R N I N G
Hazardous voltages are present in the mainframe when the GC is
connected to electrical power. Avoid potentially dangerous shock
hazards by disconnecting the power cord before removing the side
panels.
1 Switch off electrical power to the GC and disconnect the
power cord. Allow time for the oven and heated zones to cool.
Then switch off supply gases at their sources.
2 Remove column(s) and any associated hardware from inside
the column oven.
3 Lift 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.
4 Remove two screws along the lower edge of the left side (flow
control) panel. Slide the panel slightly to the rear and lift it
off.
CAUTION
Electronic components can be damaged by static electricity; use a
properly grounded static control wrist strap when removing the
electronics panel.
5 In 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.
6 Remove 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.
Installation Guide: Flame Ionization Detector (FID)
3
7 Finally, remove the rear top cover by removing four screws,
two at each end.
8 At this time, if necessary to achieve a standard factory
configuration, completely remove an existing detector and
reinstall it into its required location. If an existing detector is
being completely replaced by this new detector, carefully
store the old detector assembly and all associated parts in a
safe place for possible future use.
Positioning and Securing the Detector
CAUTION
It is neither necessary nor advisable to separate a detector from its
flow control module, as doing so may cause leaks. Although handling
the detector and connected flow module as a unit is awkward, it can be
managed.
1 If necessary, remove the round metal cutout on the oven top
from the detector position to be used. Cut the metal circle
with diagonal cutters so its nibs are connected to the piece
removed. Discard the cutout.
CAUTION
4
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.
Installation Guide: Flame Ionization Detector (FID)
2 If necessary, lift out the die-cut insulation plug from the
detector position to be used.
CAUTION
Be careful to remove only insulation within the scribed circle.
3 Carefully remove the scribed circle of insulation from the
oven top to create an opening into the oven.
Method 1: Use a sharp knife to cut out insulation using the
scribed circle as a guide.
Method 2: Pierce the insulation with a screwdriver. Rotate
the screwdriver around the edge of the scribed circle to
remove excess insulation. Remove any pieces of insulation
which fall inside the oven.
Installation Guide: Flame Ionization Detector (FID)
5
4 While positioning the detector into the cavity, use both
supplied insulation and removed oven 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.
5 Partially tighten the four pallet screws with a T-20 Torx
screwdriver, then tighten them evenly.
Captive screws (4)
Pallet
(Flow module
not shown)
6
Installation Guide: Flame Ionization Detector (FID)
Connecting the Detector
CAUTION
Printed circuit board components can be damaged by static electricity;
use a properly grounded static control wrist strap when handling the
detector board.
1 Remove the PC board from its antistatic bag and slide it fully
into the slot and main circuit board connector associated
with the installed detector. Tighten the screw on the PC
board bracket with a T-20 Torx screwdriver to secure the
board.
Insert into
main board
Tighten screw
Installation Guide: Flame Ionization Detector (FID)
7
2 Attach the signal cable and ignition wire to the PC board.
Ignitor cable
Signal cable
8
Installation Guide: Flame Ionization Detector (FID)
3 Connect the heater/sensor plug to the square receptacle
closest to the installed detector ("FD" for front detector, or
"BD" for back detector).
Heater/Sensor plug
Heater and sensor receptacle
("BD", back detector)
Heater and sensor receptacle
("FD", front detector)
(Flow module not shown)
Installing the Flow Control Module
This section describes installation of the detector flow control
module.
CAUTION
It is neither necessary nor advisable to separate a detector from its
flow control module, as doing so may cause leaks. Although handling
the detector and connected flow module as a unit is awkward, it can be
managed.
Installation Guide: Flame Ionization Detector (FID)
9
1 Determine the correct location for the detector flow control
module:
• Detector in the front position– use the upper detector
flow control module location.
• Detector in the back position– use the lower detector
flow control module location.
CAUTION
Handle the module carefully to avoid damaging its components and/or
connected tubing.
2 Remove the existing detector label plate sticker from the
module location to be used and install the new one provided.
3 Route hydrogen and air tubing between the flow module and
detector alongside existing tubing and wiring located behind
the oven top and through either slot to the detector. Avoid
making sharp bends in the tubing.
4 At the same time, route the open-ended air vent tube from
the flow module towards the rear of the GC along the inside
of the flow control portion (left side) of the instrument. The
tube should be routed to be as straight as possible.
5 Verify that the three valves on the flow module are in their
respective midway positions (rotated fully clockwise to a
stop, then rotated two to three turns counterclockwise) and
then slide the module onto two studs provided at the rear of
the flow panel.
10
Installation Guide: Flame Ionization Detector (FID)
6 Secure the module with a 1-3/4-inch screw. The screw passes
through a hole at the center of the rear of the flow module.
General representation
7 Refer to your 6820 Getting Started or Service manual both
for factory standard plumbing configurations and for proper
swage techniques to connect hydrogen and air supply gases
to the installed detector flow module.
Installing the Ignitor Extension Cable
Installing ignitor wiring for this new FID depends upon whether
this FID is the first FID installed on the GC, or if this FID is
being installed as a replacement or as a second FID:
• If this is the first FID installed on the GC, continue with the
following procedure to install the ignitor extension cable.
Installation Guide: Flame Ionization Detector (FID)
11
• If this is a replacement FID, or is a second FID, then the
ignitor extension cable should be already installed. Go to
step 3 in the following procedure.
1 Route the 4-wire (two red and two white) ignitor extension
cable assembly along existing wiring and tubing located
behind the oven top:
• Note that the flat, single connector is routed to the
electronics (right) side of the GC while the end with four
separate "push-on" connectors is routed to the flow
control (left) side.
• Route the end with the flat, single connector to be located
below the previously-installed FID printed circuit board.
Route the end with the four separate "push-on" connectors
to be located at the rear of the previously-installed flow
control module.
2 Connect the flat, single connector on the ignitor extension
cable to its mating connector found on a "ribbon" cable
leading to the keyboard assembly.
12
Installation Guide: Flame Ionization Detector (FID)
• The two connectors must be joined in the proper
orientation for correct ignitor operation; align the small
triangle found on the FID ignitor extension cable
connector with the number 1 found on the ribbon cable
connector, then push the two connectors fully together.
3 In the flow control (left side) portion of the GC, note labeling
and wire colors for the four separate "push-on" connectors
located near the detector flow control modules:
• If the previously-installed flow module is in the upper
detector position, select the red pair of wires (labeled
"FRONT") and push each connector onto an electrical
terminal at the back of the flow module (no polarity).
Installation Guide: Flame Ionization Detector (FID)
13
• If the previously-installed flow module is in the lower
detector position, select the white pair of wires (labeled
"BACK") and push each connector onto an electrical
terminal at the back of the flow module (no polarity).
In either case, there is no polarity concer; either connector
may be used on either terminal.
4 Use cable ties to secure the cable and previously-installed
FID tubing to existing wiring and tubing running behind the
oven top.
Installing the Insulation Cup
1 Install insulation into the cup.
2 Push the wire spring lever at the bottom of the cup to the
right to uncover the hole.
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Installation Guide: Flame Ionization Detector (FID)
3 From inside the oven, place the cup over the detector fitting
so its top edge touches the top of the oven.
4 Release the spring while making certain it fits into the groove
in the detector fitting.
Restoring the GC to Operating Condition
1 Restore gas supplies and check for leaks, particularly at all
new connections. Follow the leak test procedures described
in your 6820 Maintenance and Troubleshooting manual.
2 Reinstall GC covers and panels.
3 Restore GC electrical power.
4 Switch off electrical power, then switch it on again to ensure
the new configuration is properly retained in GC memory.
Installation Guide: Flame Ionization Detector (FID)
15
5 Press [ 前检测 ] or [ 后检测 ] ( [Front Det] or [Back Det] ,
respectively). If the detector has been properly installed, you
will see the following display:
前检测器 (FID)
温度
39
关
FRONT DET (FID)
Temp
39
Off
输出
Output
0.0
0.0
6 Verify detector operation by following the checkout
procedure described in your Getting Started manual.
16
Installation Guide: Flame Ionization Detector (FID)
Installation Guide: Flame Ionization Detector (FID)
17
Agilent Technologies
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
G4312-90000
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.
WA R N I N G
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.
G4312-90000
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