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