Hanna Instruments HI 904 User Manual

4.5 (2)

QUICK START GUIDE

HI 904

KARL FISCHER

COULOMETRIC TITRATOR

Revision 1.0

W W W.H A N N A I N S T .C O M

1

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.

2

 

QUICK START GUIDE

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

3

QUICK START GUIDE

4

QUICK START GUIDE

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.

5

QUICK START GUIDE

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.

6

Hanna Instruments HI 904 User Manual

QUICK START GUIDE

TITRATOR CONNECTIONS

Front View

Rear View

7

QUICK START GUIDE

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.

8

QUICK START GUIDE

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.

9

QUICK START GUIDE

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.

10

QUICK START GUIDE

Fill Titration Vessel with Reagent

The titration vessel must be filled with reagent up to the MIN marker (about 75 mL):

Lower the reagent tube below the liquid level inside the reagent bottle.

From the Idle screen, press .

Push and hold the FILL button located on the top of the air pump.

Wait until the vessel is filled up to the MIN marker with solvent.

Stop the air pump by pressing and then confirm the approximate amount of reagent in the vessel.

Raise the reagent tube above the liquid in the reagent bottle.

Prepare the Reagent for Samples

Before beginning a titration, residual moisture inside the titration vessel and reagent must be reacted:

From the Idle screen, press . The titrator will enter Pre-Titration mode, start the magnetic stirrer, and begin dosing in the titration vessel.

Once all residual moisture has been reacted (endpoint potential is reached), the titrator will enter Drift Analysis mode (assuming Automatic Drift Entry is selected). The titrator calculates the rate of atmospheric moisture seeping into the titration beaker for the next minute and displays the result in the lower right corner of the display.

If the Drift Rate is stable and the endpoint potential is maintained, the titrator will enter Standby mode. The titrator continues to maintain the endpoint potential and update the background drift rate.

Note: New (or cleaned) detector electrodes have low electrical resistance due to a lack of platinum-iodine complexes on the electrode surface. This may cause initial mV readings to be low and prevent proper pre-titration of the reagent. The endpoint value (100 mV by default) should be 200-250 mV below the mV value of “wet” reagent for proper pre-titration to occur. If necessary, adjust the endpoint and/or imposed current (in Method Options) to facilitate proper pre-titration. The platinum-iodine complex should form after several titrations and raise the mV readings.

Preparing and Introducing the Sample

Sample Mass Preparation

Measuring the sample size by mass using an analytical balance will give the most reproducible results.

11

QUICK START GUIDE

Liquid Samples:

Samples with low viscosity will be added using a syringe with needle (injection through the septum).

Weigh the syringe before and after injection in order to increase precision (back-weighing technique).

Sample Volume Preparation

Liquid samples with low viscosity can be added by volume.

Samples should be added using a precision syringe and needle.

Performing a Titration

From the main screen press for analyzing a sample. You will be prompted to enter the analyte size. Add a prepared sample according to a preparation method

outlined above. Enter the analyte size and press . The titrator will start the analysis according to the selected method.

At the end of the titration, the message “Titration Completed” will appear on the titration status, together with the final concentration of the moisture in the sample, the end point volume, and other relevant information. The titrator re-enters Standby mode (if active) in the background.

12

QUICK START GUIDE

Understanding the Displayed Information

During a titration, the following screen is displayed:

Viewing Graph During Titration

Press to display the real time titration graph.

The curve displayed is a plot of Electrode Potential vs. Titrated Water.

A dashed horizontal line represents the user selected end point potential.

Titration Termination

The titration is terminated when the conditions of the Termination Criteria have been met. The default Termination Criterion is a mV value, in which the titration is terminated after the mV value remains below the end point potential for the selected stability time.

When the titration has ended, the titrator will display the final concentration of the moisture together with the basic titration information.

To view the custom report or titration graph, press . To view statistics of multiple analyses, press .

When done, press to return to standby mode (if active).

Results

The results obtained from titration are stored in a report file that can be displayed, transferred to a USB storage device or a PC, or printed.

Viewing the last titration data

Press (while no titration is being performed).

The Data Parameters screen will be displayed.

From the Data Parameters screen highlight the

Review Last Titration Report option and press .

13

QUICK START GUIDE

The Review Result screen will be displayed.

Use the and keys to display information related to the last titration performed. See titration report on page 15.

Printing the titration report

Connect a DOS / Windows compatible printer directly to the DB 25 connector (parallel port) located on the back of the titrator.

Note: To connect the printer, please turn off the titrator and the printer.

Printing out the report:

From the Review Report screen, press .

During the information transfer to the printer, the message “Printing” will be displayed on the screen.

Press to return to the Data Parameters screen.

Press again to return to the main screen.

Saving the data on a USB storage device

This feature allows saving the results of titrations or drift logging sessions on a USB storage device.

Insert the USB storage device into the USB socket.

From the Idle screen, press . The General Options screen will be displayed.

Highlight the Save Files to USB Storage Device option using the and keys.

Press . The List of Files on Titrator screen will be displayed.

Use the or keys to select the file type: “report files”.

Press to transfer all available reports to USB storage device, or highlight the name of the report file to be transferred and press .

14

QUICK START GUIDE

Transferring a report file will automatically transfer the corresponding log file and titration graph BMP file (if applicable).

Press , to return to the General Options screen.

Press again, to return to the Idle screen.

Titration report

While scrolling with the and keys, the fields below can be seen on the titrator

display or printed. The same information is available on the saved report file (KF_00003.rpt in this example, with all report fields selected).

HI904 - Titration Report

Method

Name:

Moisture

in

Chloroform

Time

&

Date:

15:15

Jul 28,

2013

Titration

ID:

 

 

KF_00003

Company

Name:

Hanna

Instruments

Operator

Name:

 

KF

Technician

Electrode

Name:

 

 

Probe 1

Field

1:

 

 

 

Any

text

Field

2:

 

 

 

Any

text

Field

3:

 

 

 

Any

text

Titrator

Software Version:

 

 

 

v1.00

Base Board

Software

Version:

 

 

 

v3.00

Titrator

Serial Number:

 

 

04132903

Analog

Board

 

Serial

Number:

 

 

33121212

Analog

Calibration

Date:

Jul 18, 2013

 

 

 

 

 

Method

Parameters

 

 

 

Name:

 

 

 

 

 

Moisture

in

Chloroform

Method

Revision:

 

 

 

 

 

 

1.0

Type:

 

 

 

 

 

 

KF

Coulometric

Pre-Analysis Stir Time:

 

 

 

5

Sec

Stirring

Speed:

 

 

 

 

900

RPM

Stirbar

Type:

 

 

 

 

 

 

Medium

Drift

Entry:

 

 

 

 

 

Automatic

Reagent:

 

 

 

 

 

General

Purpose

Sample

Parameters:

 

 

 

 

 

 

 

Sample

Determ.:

 

 

 

 

 

Normal

Sample

Name:

 

 

 

Chloroform

Sample

Type:

 

 

 

 

 

Mass

Sample

Size:

 

 

 

 

2.8101 g

Control

Parameters:

 

 

 

 

 

 

Titration

Speed:

 

 

 

 

Auto

Standby

 

Mode:

 

 

 

 

Enabled

Standby

Duration:

 

72:00

[hh:mm]

Imposed

Current:

 

 

 

 

 

2 A

End

Point

Value:

 

 

 

100.0

mV

Generator

Current

Mode:

 

 

 

Auto

Signal

Averaging:

 

 

2

Readings

Termination

 

Parameters:

 

 

 

 

 

Maximum

Duration:

 

 

 

1200

sec

Maximum

Titrated

Water:

 

 

10.0

mg

Term. Criterion:

Relative

Drift

Relative

 

Drift:

 

 

3.0

µg/min

Result

Unit:

 

 

 

 

 

 

 

 

ppm

15

QUICK START GUIDE

Nr

Titr

Water[µg] mV

 

Time

 

0

 

 

0.0

385.7

 

00:00:00

1

 

 

0.0

385.7

 

00:00:01

2

 

 

1.5

385.8

 

00:00:02

3

 

 

3.0

385.7

 

00:00:04

4

 

 

4.5

385.4

 

00:00:05

5

 

 

6.0

385.5

 

00:00:06

6

 

 

7.5

385.8

 

00:00:07

7

 

 

8.9

385.3

 

00:00:08

8

 

 

11.2

385.3

 

00:00:09

9

 

 

13.4

386.0

 

00:00:10

10

 

 

15.7

386.8

 

00:00:11

27

 

 

62.8

385.0

 

00:00:29

28

 

 

65.8

384.7

 

00:00:30

29

 

 

68.7

383.7

 

00:00:31

30

 

 

71.6

383.9

 

00:00:32

31

 

 

74.6

385.3

 

00:00:33

32

 

 

77.5

384.8

 

00:00:34

33

 

 

80.5

384.3

 

00:00:35

34

 

 

83.4

383.5

 

00:00:36

35

 

 

86.3

382.9

 

00:00:37

36

 

 

89.3

382.2

 

00:00:38

37

 

 

92.2

381.0

 

00:00:39

38

 

 

95.1

380.1

 

00:00:40

39

 

 

98.1

380.1

 

00:00:41

40

 

 

101.0

379.4

 

00:00:42

41

 

 

104.0

377.8

 

00:00:43

42

 

 

106.9

376.1

 

00:00:44

66

 

 

140.8

101.0

 

00:01:09

67

 

 

141.2

94.1

 

00:01:10

68

 

 

141.2

91.2

 

00:01:12

69

 

 

141.2

89.9

 

00:01:13

70

 

 

141.2

88.8

 

00:01:14

71

 

 

141.2

88.1

 

00:01:15

72

 

 

141.2

87.7

 

00:01:16

73

 

 

141.2

87.9

 

00:01:17

93

 

 

141.2

89.5

 

00:01:38

94

 

 

141.2

89.3

 

00:01:39

95

 

 

141.2

89.0

 

00:01:40

96

 

 

141.2

88.9

 

00:01:41

97

 

 

141.2

89.1

 

00:01:42

98

 

 

141.2

88.8

 

00:01:43

99

 

 

141.2

88.8

 

00:01:44

100

 

 

141.2

88.9

 

00:01:45

101

 

 

141.2

88.8

 

00:01:46

102

 

 

141.2

88.8

 

00:01:47

 

 

 

Titration Results

 

 

Method

Name:

Moisture

in Chloroform

Time

&

Date:

14:35

Jul

26, 2013

Sample

Size:

 

 

2.3140 g

Drift

Value:

 

0.3 µg/min

Titrated Water:

 

141.21

µg

Result:

 

 

 

 

60.7

ppm

Titration

Duration:

 

02:37

[mm:ss]

Generator

Electrode

Type:

 

HI900511

Titration

went to

Completion

 

 

Operator Name:

 

 

Any text

Analyst Signature: _____________________

904 QS 08/13

16

INSTRUCTION MANUAL

HI 904

KARL FISCHER

COULOMETRIC TITRATOR

Revision 1.00

www.hannainst.com

1

Dear customer,

Congratulations on choosing a Hanna Instruments product.

Please read this instruction manual carefully before using the instrument. This manual will provide you with the necessary information for the correct use of the instrument.

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.

2

 

TABLE OF CONTENTS

Chapter 1.

INTRODUCTION

Chapter 2.

SETUP

Chapter 3.

USER INTERFACE

Chapter 4.

GENERAL OPTIONS

Chapter 5.

METHODS

Chapter 6.

TITRATION

Chapter 7.

AUXILIARY FUNCTIONS

Chapter 8.

MAINTENANCE, PERIPHERALS

Chapter 9.

OPTIMIZATION

Appendix 1.

TECHNICAL SPECIFICATIONS

Appendix 2.

RECOMMENDED REAGENTS

Appendix 3.

TITRATOR COMPONENTS

3

4

INTRODUCTION

1INTRODUCTION

The HI 904 is an automatic coulometric Karl Fischer titrator with high accuracy, great flexibility and repeatability.

The titrator is designed to perform titrations for a variety of applications. The main attributes of this titrator are:

Flexibility

Support up to 100 titration methods (standard and user defined).

High accuracy

Precise pulsing coulometric generator.

 

Precise mV measurement and current ( A) control.

Repeatability

Powerful built-in algorithms for termination criteria based on fixed mV endpoint or

 

absolute/relative drift.

Quick results

Pre-defined titration methods.

 

Variable titration speed for improved accuracy.

 

Balance interface for automatic weighing.

Complete report

Results are displayed directly in the selected units along with the titration information.

 

Titration graph can be displayed on the LCD and saved as a bitmap.

 

Customizable titration reports and drift analysis reports can be printed, saved on a USB

 

storage device or transferred to a PC via the USB interface.

Result history

Averaging and statistical data available for sample analysis.

GLP features

Exchange Reagent reminder.

 

Fields for specific annotations.

Conditioning phase

Automatic pre-titration for drying the reagent and titration vessel.

 

Drift analysis-adjusted titration results for improved accuracy.

Sealed solvent

Allows full operation in a completely sealed system, minimizing water vapor entry.

system

 

Self diagnosis and

Integrated help screens are available.

integrated help

Self diagnosis features for peripheral devices including air pump and stirrer.

 

Error management with warning and error messages.

Large graphical display

5.7” (320 x 240 pixels) graphical color display with backlight.

 

Easy to view text and graphs.

 

User friendly interface.

This manual provides information regarding installation and functionality of the titrator and refined operation suggestions.

Before using the titrator, it is recommended you become familiar with its various features and functionality.

1-1

INTRODUCTION

1-2

SETUP

Chapter 2. Contents

2

SETUP ...................................................................................................

2 - 3

2.1

Unpacking .............................................................................................

2 - 3

2.2

Safety Measures .....................................................................................

2 - 4

2.3

Installation ...........................................................................................

2 - 5

2.3.1

Titrator Top View........................................................................................

2

-

5

2.3.2

Titrator Rear View ......................................................................................

2

-

6

2.3.3

Titrator Left-side View .................................................................................

2

-

6

2.3.4

Titrator Assembly .......................................................................................

2

-

7

2.3.4.1 Connecting the Air Pump ..............................................................................

2

-

7

2.3.4.2 Connecting the Reagent Adapter Holder ........................................................

2

-

8

2.3.4.3

Titration Vessel ............................................................................................

2

-

9

 

2.3.4.3.1 Titration Vessel Components ....................................................................

2 - 1 0

2.3.4.4

Electrical Connections ...................................................................................

2 - 1 2

2.3.5

Reagent, Waste Bottle Assembly ..................................................................

2 - 1 3

2.3.6

Reagent Exchange Adapter ..........................................................................

2 - 1 4

2-1

SETUP

2-2

SETUP

2SETUP

2.1Unpacking

The titrator and the accessories are shipped in a single box containing:

 

 

ITEM

QUANTITY

1

Titrator ...................................................................

1 pc.

2

Air Pump Assembly .................................................

1 pc.

3

Titration Vessel Assembly .........................................

1 pc.

 

Glass Vessel

 

 

Accessory Port Stopper

 

 

Sample Port Cap and Septum

 

 

Stir Bar

 

 

Desiccant

 

 

Desiccant Cartridge

 

 

Fittings, O-rings

 

4

Vessel Support with Adapter .....................................

1 pc.

5

Pump Locking Screw with Plastic Head ......................

2 pcs.

6

Reagent Bottle Assembly ..........................................

1 pc.

Bottle Cap

Desiccant

Desiccant Cartridge

Fittings, O-rings

Tubes (Silicone and PTFE Tubing)

7

Waste Bottle Assembly .............................................

1 pc.

 

Waste Bottle

 

 

Bottle Cap

 

 

Desiccant

 

 

Desiccant Cartridge

 

 

Fittings, O-rings

 

 

Tubes (Silicone and PTFE Tubing)

 

8

Calibration Key ........................................................

1 pc.

9

Karl Fischer Dual Platinum Pin Detector Electrode .......

1 pc.

10

Reagent Exchange Adapter .......................................

1 pc.

11

Accessory Holder Assembly ......................................

1 pc.

12

Joint grease.............................................................

1 pc.

13

Karl Fischer Generator Electrode................................

1 pc.

 

• Removeable Generator Electrode Cable

 

 

 

 

 

2-3

SETUP

14

Power Adapter ........................................................

1 pc.

15

USB Cable ...............................................................

1 pc.

16

Instruction Manual Binder .........................................

1 pc.

17

USB Storage Device .................................................

1 pc.

18

HI 900 PC Application (Install Kit on USB Stick) ........

1 pc.

19

Quality Certificate ....................................................

1 pc.

See Appendix 3 section A 3 Titrator components for pictures.

If any of the items are missing or damaged, please contact your sales representative.

Note: Save all packing materials until you are sure that the instrument functions correctly. Any damaged or defective items must be returned in their original packing materials together with the supplied accessories.

2.2Safety Measures

The following safety measures must be followed:

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

2.Always check that the reagent and waste bottles and 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

Explosion hazards

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

2-4

SETUP

2.3Installation

2.3.1Titrator Top View

2-5

SETUP

2.3.2Titrator Rear View

2.3.3Titrator Left-side View

2-6

SETUP

2.3.4Titrator Assembly

Note: Assembly operations must be completed before connecting the titrator to the power supply!

2.3.4.1Connecting the Air Pump

The diaphragm air pump system is designed to work with the specially designed bottle top assemblies. It allows the reagent in the titration vessel to be removed and/or replaced with minimal exposure of the interior of the vessel to ambient moisture from atmospheric humidity. Connect the air pump with the following steps (see Figure 1):

(1)Retrieve the air pump cable (PUMP 1) from inside the left bay. Connect the cable to the air pump as shown in Figure 1. The air pump connector is located on the left side of the motor.

(2)Lower the pump into the titrator, then slide it towards the front of the titrator chassis until it is firmly latched.

(3)Secure the pump with the locking screw.

Figure 1.

2-7

SETUP

2.3.4.2 Connecting the Reagent Adapter Holder

The Reagent Adapter Holder is a convenient dock for the Reagent Exchange Adapter when it is not in use. The holder consists of a base that fastens to the titrator pump bay and a removable standard-taper glass tube. The glass tube holds the Reagent Exchange Adapter and will catch possible drips from the reagent/waste tubes. It is easily removable for cleaning purposes. Install the Reagent Adapter Holder with the following steps (see Figure 2.):

(1)Lower the Reagent Adapter Holder base into the right bay, then slide it towards the front of the titrator chassis until it is firmly latched.

(2)Secure the base with the locking screw.

(3)Insert the glass tube into the hole in the base. If the tube does not slide easily into the holder, apply a small amount of glass joint grease (included) to the outside of the tube for lubrication.

Figure 2

Note: To set up the Reagent Exchange Adapter, see Section 2.3.6.

2-8

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