Hanna Instruments HI 904 Guía

QUICK START GUIDE

HI 904

KARL FISCHER

COULOMETRIC TITRATOR

Revision 1.0

www.hannainst.com

QUICK START GUIDE

Dear customer,

Congratulations on choosing a Hanna Instruments Product.

This guide has been written for the HI 904 Karl Fischer Coulometric Titrator.

Please read this Quick Start Guide carefully before using the instrument. This guide will

provide you with the necessary information for the correct use of the instrument.

The purpose of this guide is to present a quick overview of setting up and using the

instrument.

For detailed information illustrating the extensive capabilities of your titrator, please refer to

the Instruction Manual.

Hanna Instruments

All rights are reserved. Reproduction in whole or in part is prohibited without the written consent of the copyright

owner, Hanna Instruments Inc., 584 Park East Drive, Woonsocket, Rhode Island, 02895, USA.

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Contents

INTRODUCTION ..........................................................................................................5

SAFETY MEASURES.....................................................................................................6

TITRATOR CONNECTIONS .........................................................................................7

USER INTERFACE .........................................................................................................8

HOW TO SELECT YOUR LANGUAGE ............................................................................9

HOW TO USE THE CONTEXTUAL HELP .......................................................................9

METHODS ....................................................................................................................9

BEFORE PERFORMING THE FIRST TITRATION........................................................10

HOW TO PERFORM THE FIRST TITRATION ..............................................................10

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INTRODUCTION

The HI 904 Karl Fischer Coulometric titrator is extremely flexible, capable of performing a

wide variety of highly accurate and precise water content titration methods.

The HI 904 finds a titration endpoint using a polarized electrode and an advanced detection

algorithm. A constant flow of current is maintained between the two platinum pins of the

titrator’s electrode. When the solution in the titration vessel contains water, a relatively

large voltage is required to maintain the flow of current between the pins. As the titration

proceeds, the water in the sample is consumed by the iodine that is generated electrolytically

within the vessel. At the end point, all of the water has been reacted and the cell contains

excess iodine. The presence of excess iodine within the titration cell results in a reduction

in the amount of voltage required to maintain the constant current between the pins of the

electrode. The endpoint detection algorithm incorporated in the HI 904 analyzes both the

electrode response to individual additions of iodine and the shape of the entire titration

curve in order to determine the endpoint of the titration.

Titration reports and methods can be transferred to a PC via a USB interface, saved to a USB

flash drive or printed directly from the titrator. An external monitor and keyboard can be

attached for added convenience.

How can I find certain information?

1. This Quick Start Guide will help the user learn how to operate the titrator within

a short period of time. The first analysis will be performed with the aid of the

factory stored methods.

2. The Instruction Manual provides a complete description of the operating principles

(user interface, general options, methods, titration mode, maintenance, etc.).

3. The contextual Help screens contain detailed explanations about what kind of data

can be set or viewed in every displayed screen.

4. The Titration Theory booklet outlines the basic concepts of titration.

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SAFETY MEASURES

The following safety measures must be followed:

1. Never connect or disconnect the pump assemblies with the titrator turned on.

2. Always check that the reagent and waste bottles, as well as the titration vessel are properly

assembled.

3. Always wipe up spills and splashes immediately.

4. Avoid the following environmental working conditions:

•Severe vibrations

•Direct sunlight

•Atmospheric relative humidity above 80% non-condensing

•Environment temperatures below 10°C and above 40°C.

•Near heating or cooling sources

•Explosion hazards

5. Have the titrator serviced by qualified service personnel only.

6. Avoid inhalation of reagent vapors. Avoid contact with chemicals.

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TITRATOR CONNECTIONS

Front View

Rear View

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USER INTERFACE

Keypad

The titrators have their own keypad with 29 keys grouped in four categories, as follows:

Display

The titrators have a 5.7” graphical backlit color display. The

Standby Mode

screen

is shown

below

with short explanations.

The user interface contains several screens. In each screen, many information fields are

present at the same time. The information is displayed in an easy-to-read manner, using

different size fonts.

Virtual option keys describe the function performed when the corresponding soft key is pressed.

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HOW TO SELECT YOUR LANGUAGE

To change the language, press from the main

screen. Highlight the

Language

option and then

press . Using the and keys select the

language from the options listed in the

Set Language

screen and press .

Restart the titrator in order to apply the new language

setting.

HOW TO USE THE CONTEXTUAL HELP

Any information about the titrator can be easily accessed by pressing . The contextual

help can be accesed at any time and it provides useful information about the current screen.

METHODS

The HI 904 Karl Fischer titrator can store up to 100 methods: these include up to 90

standard methods.

Standard Methods

Each titrator is supplied with a customized package of standard methods. Standard method

packs are developed at Hanna Instruments laboratories to meet analysis requirements of

specific industries.

User-Defined Methods

User-defined methods allow the user to create and save their own methods. Each new

method is typically based on an existing method which is altered to suit a specific application.

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BEFORE PERFORMING THE FIRST TITRATION

Setup the Titrator

•Make sure that all of the titrator assemblies are properly installed (see Instruction

Manual,

Setup

section).

•Make sure that the vessel system is properly sealed against atmospheric moisture

(the fittings and tubes are correctly mounted).

•The desiccant had been properly dried.

Obtaining the Reagents

•The reagents have to be suitable to the analysis requirements (see Instruction Manual,

Appendix 2

for list of preferred reagents).

HOW TO PERFORM THE FIRST TITRATION

Method Selection

For this analysis we will use the HI 9301EN Moisture in Solvent

To select this method:

•Press from the

Idle

screen. Use the and keys to highlight the

HI 9301EN Moisture in Solvent method.

•Press .

After accomplishing these operations, the method’s name will be displayed on the top line of

the

Idle

screen.

Setup Titration Report

Users can select the information that is stored for each titration that is performed.

To obtain proper information at the end of the titration, perform the following operations:

• From the main screen, press and the

Data Parameters

screen will be

displayed.

•Highlight the

Setup Titration Report

option and press .

•Mark the fields to be included with the “*” symbol using the and keys and

press to toggle the selection.

•Press and then press to return to the main screen.

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