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

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

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

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

Pneumatics chassis cover

Top cover

(discard)

Electronics cover

(discard)

Right side panel

RFI cover

Upper back cover

Installing Flame Photometric Detectors

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

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

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

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

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

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