Hanna Instruments HI 901 User Manual

INSTRUCTION MANUAL

HI 901 / HI 902

AUTOMATIC TITRATOR

NaOH

0.1 M

)

(

d n

TABLE OF CONTENTS

Chapter 1. INTRODUCTION

Chapter 2. SETUP

Chapter 3. USER INTERFACE

Chapter 4. GENERAL OPTIONS

Chapter 5. METHODS

Chapter 6. TITRATION MODE

Chapter 7. pH & mV MODE

Chapter 8. AUXILIARY FUNCTIONS

Chapter 9. MAINTENANCE, PERIPHERALS

Appendix 1. TECHNICAL SPECIFICATIONS

Appendix 2. BACK TITRATION (HI 902 only)

Appendix 3. MULTIPLE EQUIVALENCE POINTS (HI 902 only)

Appendix 4. ACCESSORIES

Dear customer,

Thank you for choosing a Hanna Instruments Product. This instruction manual has been written for the HI 901 / HI 902 Titrator products. 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.

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.

INTRODUCTION

1 INTRODUCTION

HI 901 and HI 902 are automatic titrators with high accuracy, great flexibility and repeatability.

The titrators are designed to perform a variety of potentiometric titrations, allowing the user to obtain both good results and high speed analysis.

The main attributes of these titrators are:

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

High accuracy Precise dosing system (under 0.1% accuracy).

Precise mV and pH measurements (± 0.1 mV and ± 0.001 pH accuracy). Interpolated end point volume.

Repeatability Powerful built-in algorithms for equivalence point detection (first derivative and second

derivative detection algorithms, filtered derivatives option, settable range for equivalence point detection). Fixed end point mV or pH.

Quick results Standard titration methods.

Pre-titration dosing feature. Dynamic / Linear dosing feature.

Complete report The results are displayed directly in the selected units.

Titration graph can be displayed on line and saved. User customized reports can be printed, saved on floppy disk or transferred to PC via RS232 interface. The sample information and data stamp are included in the report.

Direct measurements The titrator can also be used for precise mV, pH and temperature measurements.

Report of data logging is available for direct measurements.

GLP features Up to 5 standardization points for the pH electrode.

Reminders for titrant age and standardization expiration. Fields for specific annotations.

Large graphical display 7.5 B/W graphical display with backlight.

Easy to view text and graphs. Lots of information on each screen.

Self diagnosis and Integrated help is available. integrated help Self diagnosis features for peripheral devices including pump, valve, burette, stirrer.

Error management with warning and error messages. Predefined troubleshooting titration methods.

This manual provides information regarding installation and functionality of the titrator, pointing out hints and refined operation suggestions.

Before beginning to work with the titrator it is recommended to become familiar with its various features.

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 Front View ...................................................

2.3.2 Titrator Rear View

........................................................

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

2.3.4 Titrator Assembly ...................................................

2.3.4.1 Assembling Stirrer Stand and Support ....................................................... 2 - 6

2.3.4.2 Attaching Stirrer ..........................................

2.3.4.3 Connecting the Pump ........................................................................... 2 - 8

2.3.4.4 Attaching Burette Blank Support ....................

2.3.4.5 Attaching the Burette ......................................

2.3.4.6 Electrical Connections ......................................

2.3.5 Connection to Earth ....................................

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2.3.6 Floppy Disk Drive ...................................................

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2-6

2-9

2-10

2-11

2-1

SETUP

2-2

2 SETUP

2.1 Unpacking

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

ITEM QUANTITY

1 Titrator............................................................................... 1

SETUP

2 Pump Assembly.............................

3 Burette Assembly................................................................. 1

 Burette (with 25 mL syringe)  Aspiration Tube with Fitting and Protection Tube  Dispensing Tube with Normal Dispensing Tip, Fitting,

Protection Tube and Tube Guide

 Tube Locks  Tool for Valve Fitting and Burette Cap Removal  Light Spectrum Protection Screen

4 Stirrer Support, Stand, Collar and Positioning Screw................ 1

5 Burette Blank Support.......................................................... 1

6 Pump and Burette Locking Screws with Plastic Head................ 2

9 Temperature Sensor.............................................................. 1

10 Shorting Cap....................................................................... 1

11 Power Cable........................................................................ 1

12 RS232 Cable....................................................................... 1

13 Instruction Manual Binder...................................................... 1

14 Start-up Disk (FDD with Titrator Installation Kit)..................... 1

...

.................................. 1

15 HI 900 PC Application (FDD with Installation Kit).................... 1

16 Quality Certificate................................................................ 1

See Appendix 4 section A 4.3 Titrator components for pictures.

If any of the items is 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.

2-3

SETUP

2.2 Safety Measures

The following safety measures must be followed:

1. Always ensure that the power-supply cable is connected to a grounded main power plug.

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

3. Verify that the burette and the attached tubing are as described in this manual (see 9.1 Burette Maintenance section for more details).

4. Always check that the titrant bottle and the titration beaker are firmly sitting on a flat surface.

5. Always wipe up spills and splashes immediately.

6. Avoid the following environmental working conditions:

 Severe vibrations

 Direct sunlight

 Atmospheric relative humidity above 95% non-condensing

 Environment temperatures below 10°C and above 40°C and a normal humidity range

 Explosion hazards

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

2-4

2.3 Installation

2.3.1 Titrator Front View

NaOH

0.1 M

SETUP

2.3.2 Titrator Rear View

Positioning collar

for stirrer adjustment

Locking screws

input

2-5

SETUP

2.3.3 Titrator Left-side View

2.3.4 Titrator Assembly

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

voltage!

2.3.4.1 Assembling Stirrer Stand and Support

Follow these steps to assemble the stirrer:

 Remove the screws (2) from the titrator chassis (1).  Attach the stirrer stand (3)

stand close to the wall of the chassis.  Tighten the stirrer stand (3) using the previously removed screws (2).  Screw the stirrer support (4) in the stirrer stand (3).

to the titrator chassis. Make sure

to position the stirrer

2-6

2.3.4.2 Attaching Stirrer

To attach the stirrer to titrator, follow these steps:

 Attach the propeller (2) to the stirrer (1) by pressing it onto the stirrer shaft.  Insert the pH electrode (3) and temperature sensor (4) into the dedicated holes on

the stirrer. Push them in until they are tightened in a stable position.

SETUP



Slide the stirrer on the stirrer support and set the height by

located on the positioning collar (5).

tightening the

screw

2-7

SETUP

2.3.4.3 Connecting the Pump

To connect the pump, follow these steps:

 Retrieve the pump cable from inside the bay. The pump 1 connector is located in

left side bay. 

Connect the cable to the pump as shown in the figure below. The pump connector is

located in the lower part of the pump, near the motor.

the

 Insert the pump (2) into the dedicated bay. Lower the pump until it reaches the

lowest position, then slide it towards the front of the titrator chassis (1) until it is

firmly latched.  Secure the pump with the loking screw (3).

2-8

SETUP

HI 902 only:

Follow the previous steps (2.3.4.3) to connect and attach the second pump.

2.3.4.4 Attaching Burette Blank Support (HI 901 only)

The burette blank support installation procedure is as follows:

 Insert burette blank support (4) in the dedicated bay - on the right side (see the

previous picture). Lower the burette blank support until it reaches the lowest position, then push it toward the front of the titrator chassis (1) until it is firmly latched.

 Secure the burette blank support with the locking screw (5).

2.3.4.5 Attaching Burette

Make sure that the mark from the valve actuating cap and from the burette body are aligned as shown in the figure below.

Take care to have a correct coupling between the pump plunger (2) and the syringe piston (1) and also when sliding the burette onto its support, consider the alignment between the valve actuating cap and the valve positioning wheel, as shown in the figure below.

2-9

SETUP

2.3.4.6 Electrical Connections



Connect the pH electrode to the BNC connector (5).

 Connect the tempera

 Connect the stirrer to the MINI-DIN connector (7).

 Connect the power-supply cable to the power supply connector (2).

ture sensor to the RCA connector (6).

Nr Function Type of Connector

1 Power switch

2 Power supply (115, 230 VAC, 50-60 Hz) IEC Power line connector

3 Earth connector 5 mm screw

4 Reference electrode Ø 4 mm banana socket

5 Connection for pH or ORP indicating half-cell BNC socket

or combination electrodes (pH/mV)

6 Temperature sensor RCA socket

7 Stirrer 4-pin mini DIN

8 Connector for expansion device 8-pin DIN socket

9 External PC keyboard 6-pin mini-DIN (Standard PS2)

10 External display Standard VGA display 15-pin socket

11 RS232 interface Standard DB 9 pin socket

12 Printer standard DB 25pin socket

2-10

SETUP

2.3.5 Connection to Earth

It is important that the titrator has a good connection to Earth. The titrator is properly grounded through the power cord and for added confidence the unit can be connected to Earth using the optional 5 mm screw and the nut connection located on the rear panel of titrator.

Connect to Earth (optional)

2.3.6 Floppy Disk Drive

Report files, new created (user) methods, standard methods can be transferred to and from the titrator using a standard 3.5 floppy disk.

2-11

SETUP

2-12

USER INTERFACE

Chapter 3. Contents

3 USER INTERFACE .................................................................................. 3-3

3.1 Start Up

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3-3

3.2 Description ............................................................................................ 3-4

3.2.1 Keypad

3.2.1.1 Function Keys ..................................................................................... 3 - 4

3.2.1.2 Option Keys ...................................................

3.2.1.3 Arrow Keys .........................................

3.2.1.4 Numeric Keys .........................................................

3.2.1.5 Enter Key ........................................................

3.2.2 Display ...........................................................

3.2.3 The Main Screen ..........................................

3.3 Menu Navigation .......................................

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3.3.1 Selecting an Option ................................................................................... 3 - 7

3.3.2 Selecting a Menu Item ............................................................................... 3 - 7

3.3.3 Entering Text ....................

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3.3.4 Saving Modifications .................................................................................. 3 - 8

3-1

USER INTERFACE

3-2

USER INTERFACE

3 USER INTERFACE

3.1 Start Up

Once the instrument is assembled and installed, please follow these steps to start up the titrator:

 Connect the instrument to a main power plug with ground wire. Make sure that the

voltage of the main power and the one specified on the titrator are the same.

 Turn on the titrator from the power switch located on the back of the instrument.

 Wait until the titrator finishes the initialization process.

Note:

 Press

All the performed initialization processes must be successfully completed. If one of them is terminated by a Failed message, restart the titrator from the power switch. If the problem persists, contact your dealer.

when prompted or wait a few seconds for titrator to start.

3-3

USER INTERFACE

3.2 Description

This chapter describes the basic principles of navigating through the user interface, selecting fields and entering values from the keypad.

3.2.1 Keypad

The titrators keypad is grouped into four categories, as follows:

3.2.1.1 Function Keys

If one of these keys is pressed, the associated function is immediately performed. The

and keys are active only in specific screens:

Displays contextual Help

Turns the stirrer ON and OFF

Gives access to results menu

Reserved

Starts or stops a titration or data logging (when the titrator is in pH or mV mode)

3.2.1.2 Option Keys

These keys are assigned to the virtual-keys on the display. The significance of each option key depends on the menu displayed on the screen.

The function related to an underlined virtual-key can also be activated by pressing .

3-4

3.2.1.3 Arrow Keys

These keys have the following functions:

 Move the on-screen cursor.  Increase and decrease the stirrer speed and other settings.  In the alphanumeric screen, to select a letter or to navigate through menu options.

3.2.1.4 Numeric Keys

Keys to - Used for numeric entries.

- Toggles between positive and negative values.

- Decimal point.

- Initiates entry of exponent for scientific notation.

3.2.1.5 Enter Key

USER INTERFACE

Both

, keys perform the same functions:

 Accepts alphanumeric data entry.  Executes the default (underlined) virtual option key.

3.2.2 Display

The titrator has a large graphical display with built-in backlight. explanations is presented below.

Time and date

Temperature

compensation

status

The main screen with short

End point volume

Temperature

reading

Virtual option keys

3-5

USER INTERFACE

The user interface contains several screens. For each titrator function, one or more screens are used.

Warnings and other critical information are displayed in reversed font.

3.2.3 The Main Screen

After start up and initialization, the first screen displayed is the main screen. The main screen fields describe:

Method name: Displays the name of the selected method Time and date: Displays the current date and time Temperature reading: Displays the measured temperature

ATC: Indicates automatic temperature compensation Manual: Indicates manual temperature compensation

Manual: Indicates manual temperature compensation as the temperature

probe is not connected

Stirrer information:

End point volume: Displays the volume delivered to reach the titration end point. When

Titration result: Displays the titration result mV or pH reading: Displays the current readings. The sample reading will be: mV

mV: Indicates actual potential reading rel mV: Indicates relative potential reading pH: Indicates actual pH value

Titration status: Displays the status of the selected titration. When no titration was

Reminders: Indicates when a task needs to be performed and displays error

Pump 1 Active: Displays the current active pump

Actual / Set stirrer speed is displayed in RPM. When stirrer is off, the stirrer information is not displayed

no titration has been performed, the displayed volume is 0.000 mL

or pH respectively

performed, No results is displayed

or warning messages

3-6

3.3 Menu navigation

USER INTERFACE

3.3.1 Selecting an Option

To select an option, simply press the option key below the virtual option key. For example, to access the Method

Options screen press

3.3.2 Selecting a Menu Item

To select an item from the menu screen use the arrow

keys and to move the cursor. When the menu is larger than the display, a scroll bar is active on the right side. The and keys can be used to scroll through the pages. To activate the selected menu item, press or .

3.3.3 Entering Text

To enter text in an alphanumeric input box, first erase the previous text by using . To enter a letter, highlight it using the arrow keys then press . Use the same procedure to enter the whole name. For editing, use the and keys.

When editing is complete, press .

The method name will be updated and displayed in the name field of the View/Modify Method screen. When all the desired parameters have been set, press

3-7

USER INTERFACE

3.3.4 Saving Modifications

The Saving Method screen allows the user to save the modifications. To exit from Saving Method screen

without saving, press

Saving Method option and then press . To save the modifications highlight the Save Method option and then press .

After the method name is changed, it appears in the method name field.

Note: To access the contextual help menu, press at any time. Help is related to the

displayed screen. Press or press again to return to the previous screen.

or highlight the Exit Without

3-8

Chapter 4. Contents

GENERAL OPTIONS

4 GENERAL OPTIONS ...................................................

4.1 Active Pump .................................................

4.2 Temperature .........................................................................................4-4

4.2.1 Temperature Source ..................................................................................4 - 5

4.2.2 Manual Temperature Setting .............................................

4.2.3 Temperature Units ................................................

4.3 Date and Time Setting ........................................

4.4 Display Settings ..................................................

4.5 Beeper ............................................................................

4.6 Stirrer .................................................................................................... 4-8

4.7 Language .........................................................................

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4.8 Daily Standardization Rem

4.9 Periodic Standardization Remin

4.10 Total Volume Alert .......................................

4.11 Titrant Age Reminder ...........................................

4.12 Save Files to Diskette .....................................

4.13 Restore Files from Diskette ...................................................

4.14 Serial Link with PC ...............................................................

4.15 Reset to Default Settings ...............................

4.16 Update Software ................................................................................... 4-14

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4-1

GENERAL OPTIONS

4-2

GENERAL OPTIONS

4 GENERAL OPTIONS

The General Options screen gives access to options that are not directly related to the titration process or pH / mV measurement. To access this screen, press from the main screen. The available menus are described below:

4.1 Active Pump

The HI 901 and HI 902 titrators can be equipped with one or two dosing systems (pump & burette). Only one pump can be active at a time. This option allows the user to set active either pump 1 or pump 2. Any further operations that involve the pump are referring to the active one.

Highlight the Active Pump option and then press . The Active Pump screen is displayed.

If there are two pumps connected to the titrator: use the arrow keys to select the active pump as follows:

4-3

GENERAL OPTIONS

 Highlight the pump to be activated.

 Press and the highlighted pump is set as temporarily active (for the duration

of the current running session). After the titrator is restarted, the active pump will

be reset to the one set as default.

 Press

session and all following running sessions.

If only one pump is connected to titrator, the Active Pump screen will be as follows:

and the highlighted pump is set as active immediately in the current

4.2 Temperature

The Temperature Menu screen allows selection of temperature source and other options related to temperature.

4-4

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