Agilent Technologies 8453 Manual de usuario

Multicell Transport for

Agilent 8453 UV-visible

Spectrophotometer

Operator’s Manual

Agilent Technologies Deutschland GmbH

Hewlett-Packard-Strasse 8

76337 Waldbronn

Germany

Copyright Agilent

Technologies 2000

Reproduction, adaption,

or translation without

prior written permission

is prohibited, except as

allowed under the

Part No. G1120-90001

Edition 02/00

Printed in Germany

Warranty

The information

contained in this

document is subject to

change without notice.

Agilent Technologies

makes no warranty of

any kind with regard to

this material,

including, but not

limited to, the implied

warranties or

merchantability and

fitness for a particular

purpose.

Agilent Technologies

shall not be liable for

errors contained herein

or for incidental or

consequential damages

in connection with the

furnishing, performance,

or use of this material.

WARNING

For details of safety,

see Safety Information

on page 48.

Warning Symbols Used

In This Book

The apparatus is marked

with this symbol when

the user should refer to

the instruction manual

in order to protect the

apparatus against

damage.

Operator’s Manual

Multicell Transport for Agilent 8453 UV-visible

Spectrophotometer

In This Book

This handbook contains specifications of the eight-position multicell

transport (order number G1120A) and describes how install this accessory in

an Agilent 8453 UV-visible spectrophotometer. This handbook also includes

operating guidelines for checking out and using the multicell transport. For

details of how to operate the multicell transport through the Agilent

ChemStation, refer to the help system.

For service personnel there is additional information on maintenance,

adjustments, troubleshooting and repair. Part numbers are given for

replacement and exchange parts with an exploded view for better

identification of the individual part.

The eight-position multicell transport is not compatible with older Hewlett-

Packard spectrophotometers such as the HP 8450, HP 8451 and HP 8452A.

To control the multicell transport through the Agilent ChemStation, the

software must be revision A.05.xx or higher.

• Chapter 1 “Description and Specifications” gives you specifications of the

multicell transport.

•Chapter 2 “Installing and Operating Your Multicell Transport”describes

how to install the multicell transport in your spectrophotometer and how

to do an an operational checkout.

•Chapter 3 “Diagnostics and Troubleshooting”for some hints about

cleaning the multicell transport and for troubleshooting.

•Chapter 4 “Maintenance and Repair”describes simple maintenance tasks,

repair procedures, and the adjustments that are necessary after you have

made a repair.

•Chapter 5 “Parts and Supplies”helps you to locate parts and find out their

part numbers.

Contents

1 Description and Specifications

An overview of the multicell transport accessory and its

specifications 7

Description 8

Specifications 10

2 Installing and Operating Your Multicell Transport

How to install, operate, and do an operational checkout 11

Site Requirements for Your Multicell Transport 13

Unpacking Your Multicell Transport 14

Installing Your Multicell Transport 15

Installing the Stirring Module 18

Installing the Filter Kit 20

Operating Your Multicell Transport 23

Removing the Multicell Transport from the

Spectrophotometer 25

To Remove the Cell Holder 26

3 Diagnostics and Troubleshooting

Descriptions of error messages, general troubleshooting hints,

and how to check the electronics 27

Error Messages 28

General Troubleshooting Hints 29

Checking the Electronics 31

Contents

4 Maintenance and Repair

Simple maintenance tasks, repair procedures, and adjust-

ments that are necessary after you have made a repair 33

Simple Maintenance 35

Replacing the Plastic Cover 36

Adjusting the Belt Tension 38

5 Parts and Supplies

Figures and tables to help you identify part numbers of the

multicell transport and related supplies 39

1Description and

Specifications

An overview of the multicell transport accessory

and its specifications

Description and Specifications

Description

The eight-position multicell transport (order number G1120A) is an

accessory for the Agilent 8453 UV-visible spectrophotometer. It is a

multiple-sample holder with multiple-position capability, see Figure 1. The

multicell transport cell holder holds eight cells in a rack which can be held at

a constant temperature with water circulated from a thermostatic bath

(provided by the user and not supplied by Agilent Technologies).

Figure 1 The Eight-position Multicell Transport

The holder is attached to the multicell transport base which contains a

stepper motor to move the designated cell into the optical path. A

water-driven magnetic stirrer can be fitted under the holder in one of two

positions—either under the cell in the optical path or under the cell to the left

of the cell in the optical path.

The multicell transport can be controlled by any Agilent Technologies

UV-visible operating software, having revision A.05.xx or higher, through the

accessory interface of the spectrophotometer.

NOTE The eight-position multicell transport can not be controlled by Agilent

Technologies UV-visible operating software with revision A.02.05 or lower.

Cell Holder

Tubing Clamp

Stirring module with

cell-stirring water-supply

(optional)

Connection for

water bath

Description and Specifications

Description

Cell Stirring Module

The cell stirring module is mounted in the multicell transport base to provide

magnetic-induction stirring in the cell at or adjacent to the measurement

position. The cell stirring module contains a plastic-cased magnetic impeller

that may be driven by pressurized water. When a magnetic stirring bar (part

number 9301-1161) has been inserted in a solvent-filled, standard 1 cm

cuvette the stirring bar rotates in tandem with the impeller magnet to

produce solution stirring.

Cell Holder

The cell holder has a capacity for eight cells. The outside dimensions of

individual cells must be 12.5 ×12.5 mm and the height from base of the cell to

the sample area 15 mm.

During an analysis, the position of individual cells is maintained by a flat

spring inside each of the cell compartments. The spring alone fixes the cell.

No additional fixing mechanism is needed, see Figure 1.

Optical Filter Kit

An optional optical filter kit (part number G1120-68707) may be used with the

cell holder to modify the incident light at the sample during a measurement in

case of highly photosensitive samples.

Description and Specifications

Specifications

The multicell transport generally operates under the same environmental

conditions as those specified in the Reference Handbook for the Agilent 8453

spectrophotometer. A maximum water pressure of approximately 3.5 bar

(50 psi) can be supplied to the thermostatted cell holder and to the

water-driven stirrer.

Table 1 Multicell Transport Performance Specifications

Item Specification Comment

Time to move between adjacent cell

positions

< 1 second

Position repeatability ± 0.1 mm Linear position error in moving to

a cell position within 1 hour

Step resolution 0.060 mm

Temperature range for thermostatting

(cell holder only)

5–90 °C

Temperature difference between any

two cell positions

0.3 °C With a water bath at 37 °C

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