Agilent Technologies G2334A User manual

Installation Guide
Flame Photometric Detectors on 6890 GC
Accessories HP G2333A and G2334A

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 G1535-90327
First Edition, MAY 2000
Second Edition, AUG 2001
Replaces Part No. G1535-90300, Installation
Guide for Single and Dual Flame
Photometric Detectors, Part No. G1535-
90307, Update to above guide.
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)

Installing Flame Photometric Detectors
1
Installing Flame Photometric Detectors
Accessories G2333A and G2334A
Parts Provided
Description Part Number Qty
Electronics cover, FPD G1535-80540 1
Electronics cover pan G1535-00120 1
Top cover, FPD 1
Single wavelength FPD G1535-80550
or Dual wavelength FPD G1535-80560
Flame photometric detector assembly 1
Single wavelength FPD G1535-60550
or Dual wavelength FPD G1535-60560
Actuator solenoid bracket G1580-00070 1
Auxiliary zone/valve box harness G1530-60660 1
Torx screw, M4 x 12, T20 0515-2496 7
ROM set G1530-60700* 1
Wrist strap 9300-1408 1
Label, Hot warning 1
* This part number is for ROM version A.03.01. Future releases will
have different part numbers.

Installing Flame Photometric Detectors
2
Tools Required
• T-20 Torx screwdriver
• Open end wrenches
•Knife
• Electric drill with 1/8 inch bit (early 6890s only)
• Chip removal tool (Amp 821903-1 or equivalent)
Turn the power off
WARNING Hazardous voltages are present in the instrument whenever the power cord
is connected. Avoid a potentially dangerous shock hazard by disconnecting
the power cord before working on the instrument.
1. Set the main power line switch in the lower left corner of the front panel
to the off position. The pushbutton should be "out".
2. Disconnect the power cable from its receptacle.
3. Allow time for the oven and heated zones to cool.
4. When the heated zones are cool, turn off all gas supplies.
Clean out the oven
Remove columns and hardware associated with both detectors to clear the
way for the flame photometric detector.
Remove the right side panel
Caution This operation exposes static-sensitive parts. Do not touch any of the parts
inside the right side panel until specifically instructed to do so.
1. Loosen the two captive screws securing the gray plastic right side panel
along the top edge.
2. Slide the panel toward the rear of the instrument to disengage the hook
at the top, tilt the panel outward, and lift.

Installing Flame Photometric Detectors
3
Pneumatics chassis cover
Top cover
(discard)
Electronics cover
(discard)
Right side panel
RFI cover
Upper back cover

Installing Flame Photometric Detectors
4
Remove the electronics cover
Two spring clips hold this—the front one is visible in the drawing. Reach
under the cover, release the clips, and lift the cover. Discard the cover.
Remove the top cover
Raise the gray plastic top cover (with the holes and ventilation slots) to the
vertical position. Examine the hinge in the right rear corner.
•Early 6890 models. The hinge is a metal bracket attached to the oven
top. Pull the clip at its top toward you to release the hinge pin. Push the
pin to the left to release the cover. Raise the right side of the cover and
remove it. Discard the cover.
The hinge is held to the oven top by two rivets and to the bracket behind
it by one rivet. Use a 1/8-in. bit in an electric drill to remove the three
rivets. Discard the hinge.
Caution Be careful not to drill too deep. You only want to remove the rivet heads.
•Current 6890 models. Raise the right side of the cover and remove it.
Discard the cover.
Remove the pneumatics chassis cover
This is the gray plastic cover across the top rear of the GC. It is held by
spring clips on the left and right ends. Lift up on each end to release the
clips and remove the cover.
Remove the RFI cover
The RFI cover is secured by one screw at the front left corner. Remove the
screw, slide the plate to the right to disengage the tabs, and lift it off.
Remove the upper back cover
Remove the upper (3 screws) metal back cover of the instrument. Do not
remove the lower back cover.

Overview
5
Overview
Single wavelength FPD
One or two single wavelength FPDs can be installed. If only one is installed,
it is usually most convenient to place it in the back location because of its
size. However, there is no reason—other than convenience—why it cannot be
installed in the front position.
Each single wavelength FPD has a printed circuit board that mounts in a slot
on the right side of the GC. A detector in the front location must connect to a
board in the front slot; similarly, the board for a back detector must be in the
back slot.
The signal, high voltage, and ignitor cables from the detector connect to its
printed circuit board. The heater/sensor cables—two per detector, one short
and one long—plug into connectors on the right side of the GC. Details
appear later in this document.
The pneumatics module mounts in the pneumatics chassis at the top rear of
the GC. There are specific module locations for the front and back detector
locations, which appear later in this document.
Dual wavelength FPD
This detector has one burner assembly and two photomultiplier tube (PMT)
assemblies. It must be mounted in the back location. It uses two printed
circuit boards, one in each slot. The one in the back slot is the master; the
ignitor cable must connect to this board. It doesn’t matter which board
serves which PMT, but the high voltage and signal cables for a given PMT
must go to the same board. The heater/sensor cables go to the positions for a
back detector. Again, details appear later.
The pneumatics module goes in the back detector position.

Overview
6
A typical installation
The figure shows the parts for a single wavelength FPD mounted in the back
location. For the front location, the pneumatics module goes in the slot to
the right of the one shown and the detector and board are moved to the front
location and slot.
Figure 1. Installing a single wavelength FPD
Flame photometric detector
Hot Warning label
Pneumatics
module
Actuator solenoid
bracket and wiring
harness
Printed circuit board

Remove or relocate an existing detector
7
Remove or relocate an existing detector
Caution It is not necessary and not advisable to separate detectors from their
pneumatics modules. Doing so can create leaks. Although handling the
detector and pneumatics module as a unit is awkward, it can be managed.
1. Select the location—front or back—where the FPD will be installed. If
possible, it should be installed in the back position. If a detector is
presently mounted in the selected location, remove it and its
pneumatics module. See the manual for the existing detector for details.
Caution This procedure requires precautions against electrostatic discharge. Use the
grounded wrist strap (part no. 9300-1408) and connect it to a bare metal
surface of the GC. Failure to heed this caution may result in damage to the
instrument or to the detector electronics.
2. Pneumatics modules are held by a single screw from the front. Remove
the screw and slide the module, the detector, and other attachments out
the back of the chassis.
3. If the existing detector is to be installed in the other detector location,
see its manual for details.
Install the Hot Warning label
Install the warning label above the oven door, as shown in Figure 1. Align it
with the left edge of the large hole and the rear edge of the blue bar.

Prepare the detector location
8
Prepare the detector location
If the detector location has not been used before
1. The detector location may be covered by a metal knockout plate. Either
cut the webs that hold it or use a screwdriver in the center slot to bend
it back and forth until the webs break. Discard the plate.
2. There are two layers of insulation on top of the oven. Use a sharp knife
to cut through the top layer—the soft one—using the hole in the metal as
a template. Remove the soft insulation to expose the hard insulation.
3. There is a precut hole in the hard insulation that is filled with a plug.
Push the plug out into the oven and discard it.
If the location has been used before
1. Remove any insulation left over from a previous detector. Check that
the hole in the soft insulation conforms to the hole in the metal top
plate.
2. If the precut hole in the hard insulation is still plugged, push the plug
out and discard it.
Knockout plate, discard
Outside oven shell
Soft insulation
Hard insulation
Inside oven shell
Plug, discard

Install the pneumatics module
9
Install the pneumatics module
This section describes installation of the current version of the pneumatics
module. For information on the earlier version, see the Appendix.
Caution It is not necessary and not advisable to separate detectors from their
pneumatics modules. Doing so can create leaks. Although handling the
detector and pneumatics module as a unit is awkward, it can be managed.
1. Locate the correct slot for the pneumatics module.
•If the detector is to be mounted in the front location, use the second
slot from the left (as viewed from the back of the GC).
•If the detector is to be mounted in the back location, use the third
slot from the left (as viewed from the back of the GC). Note that a
dual wavelength detector must be mounted in the back location.
Caution Hold the manifold by its support bracket to avoid damaging the components.
2. Slip the ID tag on the manifold through the slot in the mounting bracket,
then align the bracket holes over the gas fittings. Secure the bracket
with three 7/16 inch hex nuts. See Figure 2.
Figure 2. Bracket mounted on the manifold
Mounting bracket
Gang fitting installs here
Ribbon cable
7/16 inch hex nuts
Label ID tag
through slot

Install the pneumatics module
10
3. Peel the blank label from its backing and paste it on the mounting
bracket over the screw heads. See Figure 3.
4. Shape the tubing from the gang fitting so that it bends up and back from
the block as shown in Figure 4.
5. Route the ribbon cable behind the manifold assembly as shown in
Figure 3. Then, slide the manifold and bracket assembly into the slot
until the bracket seats flush against the end of the rails. See Figure 4.
Figure 3. Routing the ribbon cable
Figure 4. Manifold, after installation
Back of manifold Manifold installed, cable to left
Route tubing
on this path
Check for
interference
Bracket flush
with rails
Attach gang
fitting

Install the pneumatics module
11
6. Route the gas tubing:
•Detector in the back position. Route the tubing behind the
manifold, over the top of the chassis, and through the slots as
shown in Figure 4.
•Detector in the front position. Route the tubing behind the
manifold and over the top of the chassis. Run it directly to the
detector; do not run it through the slots.
7. Connect the ribbon cable to the mating connector on the pneumatics
board. Arrange the cable to keep it away from the valves and keep it
from being pinched against the manifold.
For the back detector, you may want to loosen the manifold and slide it
out of the carrier a few centimeters to connect the cable to the
pneumatics board. Then reinstall the manifold.
8. Secure the manifold in place using the Torx T-20 mounting screw on the
front of the pneumatics chassis.
9. Using a pair of needle-nosed pliers, remove the appropriate top rear
panel detector cutout for the FPD. Also remove any cutouts needed to
access other manifolds or accessories installed in the GC. See Figure 5.
Figure 5. Top rear panel cutouts
10. Place the new top rear panel on its left-most mounting screw. Use the
screw as a hinge and angle the panel while sliding each manifold ID tag
Front detector
Auxiliary
Left-most screw slot
Back detector
Insert tip of
pliers here
Back inlet
Front inlet

Install the pneumatics module
12
through its cutout in the panel, working from left to right. When all the
tags are through the panel, finish installing the panel on the GC.
11. Install the RFI cover, the pneumatics cover, and the detector top cover.
12. Connect the source gas lines to the manifold.
13. Restore gas pressures and leak check all fittings.

Install the detector
13
Install the detector
1. Place the detector in the selected location—dual wavelength must go in
the back location—with the column fitting extending through the
insulation into the oven. The PMT housing(s) will be parallel to the front
of the GC.
2. The detector is held to the oven top by four screws, one at each corner.
Insert the two screws on the right first but do not tighten them.
3. Install the two screws on the left side through the sheet metal cover—
which is only present on the single wavelength FPD—and the detector
base. Press the cover against the detector and tighten the screws.
4. Now tighten the screws on the right side.
5. Bend the gas lines from the pneumatics module downward to one of the
T-slots in the bracket on top of the oven. Pass the lines through the slot.
Form excess length into an S-curve on top of the oven.
Cables removed
for clarity
Sheet metal cover
Left side screws
(one hidden)
Right side screws

Install the detector board(s)
14
Install the detector board(s)
There are two locations just behind the keyboard on the right side of the
instrument for the detector printed circuit boards.
Caution This procedure requires precautions against electrostatic discharge. Use the
grounded wrist strap (part no. 9300-1408) and connect it to a bare metal
surface of the GC. Failure to heed this caution may result in damage to the
instrument or to the printed circuit board.
1. Insert the board in the correct guide for the location used.
•For a single wavelength detector, the board goes in the slot for the
detector position used.
•For a dual wavelength detector, boards go in both slots. The board
in the back slot becomes the master board, providing high voltage
and signal processing for one PMT assembly and ignitor power for
the detector burner assembly. It controls the other board.
The board in the front slot provides high voltage and signal processing
for the other PMT assembly.
2. Press the board firmly into place so that the connector on the board
engages the matching connector on the GC main circuit board.
3. Secure the board with the captive screw in the bracket on its rear side.
Connector, bracket
on other side
Guide for front detector board
Guide for back detector board

Connect the cables to the detector board
15
Connect the cables to the detector board
There is a metal clip on the side of the PMT housing support. Collect the
cables and route them through this clip.
Detector board connector locations
Caution With a dual wavelength FPD, it does not matter which of the two circuit
boards is used for which PMT. However, the high voltage and signal cables
from each PMT must go to the same board. Do not "cross-wire".
High voltage cable
This is a black cable with a brass connector on the end. Press it down over
the high voltage connector on the board until it "clicks" into place.
Signal cable
This is a black cable with a BNC connector on the end. Press it onto the
signal connector on the board and turn the knurled ring to lock it in place.
High voltage connector
Signal connector
Ignitor connector
Plugs into main board

Connect the cables to the detector board
16
Ignitor cable
This gray cable ends in a 2-pin flat connector. Press it into the ignitor
connector on the board until it locks into place. There is only one way that it
can be connected.
If you are installing a dual wavelength detector, there will be only one
ignitor cable. Connect it to the board in the back detector slot.
Heater/sensor cables
There are two heater/sensor cables for each detector tower; one for the
burner block and one for the transfer line. Both cables have woven glass
sleeves, but one is much longer than the other.
Short heater/sensor cable
Plug the short heater/sensor cable into the appropriate connector on the
right side of the GC, as shown in the figure. There is only one way that the
connectors will go together.
Connector for back detector
Connector for front detector

Connect the cables to the detector board
17
Long heater/sensor cable
1. Examine the main board on the right side of the instrument. Locate the
2 x 8 connector indicated by the arrow.
2. If this connector has a wiring harness and bracket attached to it, skip to
step 6. If nothing is attached to the connector, continue with step 3.
Connector
Actuator solenoid bracket
Wiring harness
Connector on main board

Connect the cables to the detector board
18
3. Attach the wiring harness to the bracket as shown. The connectors are
labeled and push into the bracket from the bottom.
4. Attach the bracket to the GC frame with two screws.
5. Plug the connector on the wiring harness into the 2 x 8 connector on the
main board.
6. Pass the long heater/sensor cable under the printed circuit board and
guide and plug it into an auxiliary connector on the bracket.
•Single wavelength detector in the front location. Plug the long cable
into the A1 connector.
•Single wavelength detector in the back position. Plug the long cable
into the A2 connector.
•Dual wavelength detector which must be in the back location. Plug
the long cable into the A2 connector.
2 x 8 connector
A1 connector
A2 connector
Tighten two screws
Plug into 2 x 8 connector