jenway 3520 Manuale utente

Marca: jenway

Modello: 3520

Categoria: Misurazione, test

Tipo: Manuale utente

Instruction Manual

352 050/REV B/01-17

pH/mV Temperature Meter

Model 3520

Safety

Please read this information carefully prior to installing or using this equipment.

1. The unit described in this manual is designed be operated only by trained personnel. Any

adjustments, maintenance and repair must be carried out as defined in this manual, by a

person qualified to be aware of the hazards involved.

2. It is essential that both operating and service personnel employ a safe system of work, in

addition to the detailed instructions specified in this manual.

3. Other than for those items defined in the maintenance procedures herein there are no

user serviceable items in this instrument. Removal of covers and attempted adjustment or

service by unqualified personnel will invalidate the warranty and may incur additional

charges for repair.

4. References should always be made to the Health and Safety data supplied with any

chemicals used. Generally accepted laboratory procedures for safe handling of chemicals

should be employed.

5. If it is suspected that safety protection has been impaired in any way, the unit must be

made inoperative and secured against any intended operation. The fault condition should

immediately be reported to the appropriate servicing authority.

Merci de lire attentivement ces informations avant d'installer ou d'utiliser cet appareil.

1. L'appareil décrit dans ce manuel est conçu pour être utilisé uniquement par des

personnes formées. Tout réglage, maintenance ou réparation doit être effectué comme

décrit dans ce manuel, par une personne qualifiée consciente des risques encourus.

2. Il est essentiel que les personnes utilisant et intervenant sur cet appareil respectent les

règles de sécurité de travail, en plus des instructions détaillées précisées dans ce

manuel.

3. En-dehors des éléments décrits dans les procédures de maintenance ci-incluses, cet

appareil ne contient aucun élément réparable par l'utilisateur. L'enlèvement des capots et

les tentatives de réglage ou de réparation par des personnes non qualifiées invalide toute

garantie et entraîne un risque de frais de réparation supplémentaires.

4. Toujours se référer aux fiches techniques de santé et de sécurité accompagnant tout

produit chimique utilisé. Respecter les procédures de laboratoire généralement

acceptées pour la manipulation en toute sécurité des produits chimiques.

5. Si l'utilisateur suspecte qu'un problème quelconque puisse mettre en cause la sécurité,

l’appareil doit être rendu inopérant en empêchant son utilisation. Communiquer la

défaillance constatée au service de maintenance compétent.

Bitte lesen Sie diese Hinweise vor Installation oder Gebrauch dieser Ausrüstung sorgfältig

durch.

1. Das in diesem Handbuch beschriebene Gerät darf nur von geschultem Personal bedient

werden. Alle Anpassungen, Wartungsarbeiten und Reparaturen müssen entsprechend

der Vorgaben in diesem Handbuch und von einer kompetenten Person, die mit den damit

verbundenen Gefahren vertraut ist, durchgeführt werden.

2. Es ist wichtig, dass sowohl das Bedienungs- als auch das Service-Personal zusätzlich zu

den detaillierten Anweisungen in diesem Handbuch ein sicheres Arbeitssystem

einsetzen.

3. Mit Ausnahme der Teile, deren Wartungsverfahren in diesem Handbuch beschrieben

sind, enthält dieses Gerät keine weiteren Teile, die vom Benutzer gewartet werden

können. Das Entfernen von Abdeckungen und Versuche von hierfür unqualifiziertem

Personal, Anpassungen oder Wartungsarbeiten durchzuführen, haben zur Folge, dass

die Garantie verfällt und können zusätzliche Reparaturkosten auslösen.

4. Es ist jederzeit auf die sicherheitsrelevanten Daten sämtlicher verwendeter Chemikalien

Bezug zu nehmen. Allgemein anerkannte Labormethoden zum sicheren Umgang mit

Chemikalien sollten eingesetzt werden.

5. Besteht der Verdacht, dass die Sicherheitsvorrichtungen in irgendeiner Weise beschädigt

wurden, muss das Gerät außer Betrieb genommen und gegen weiteren Gebrauch

gesichert werden. Die Störung sollte der zuständigen Serviceeinrichtung unverzüglich

gemeldet werden.

Leggere attentamente queste istruzioni prima di installare o utilizzare il dispositivo.

1. L'unità descritta nel presente manuale è stata realizzata per essere utilizzata solo da

personale che ha ricevuto l'apposita formazione. Qualsiasi operazione di regolazione,

manutenzione e riparazione deve essere effettuata sulla base di quanto indicato nel

presente manuale da personale qualificato consapevole dei rischi connessi.

2. È fondamentale che il personale operativo e il personale addetto alla manutenzione

utilizzino un sistema di lavoro sicuro, oltre a seguire le istruzioni specificate nel presente

manuale.

3. Oltre a quelli indicati nelle procedure di manutenzione, all'interno di questo dispositivo

non sono presenti altri elementi sui quali è possibile effettuare interventi. La rimozione

delle protezioni e qualsiasi tentativo di regolazione o di manutenzione posto in essere da

personale non qualificato invaliderà la garanzia. In questi casi, sarà necessario pagare un

importo per le riparazioni effettuate.

4. È sempre necessario fare riferimento ai dati sulla salute e sulla sicurezza forniti con le

sostanze chimiche utilizzate. Adottare le procedure di laboratorio generalmente accettate

per la gestione delle sostanze chimiche.

5. Nel caso in cui si sospetti che la salute possa essere pregiudicata in qualsiasi modo,

disattivare l'unità per renderla inutilizzabile. Qualsiasi condizione di errore deve essere

immediatamente segnalata al responsabile per la manutenzione.

Lea esta información atentamente antes de instalar o utilizar este equipo.

1. La unidad descrita en este manual está diseñada para que solamente la utilice personal

con formación. Cualquier operación de ajuste, mantenimiento y reparación debe llevarse

a cabo del modo indicado en este manual y debe realizarla una persona cualificada que

sea consciente de los peligros que implica.

2. Es fundamental que tanto los operarios como el personal de servicio utilicen un sistema

de trabajo seguro, así como las instrucciones detalladas que se especifican en este

manual.

3. Cualquier elemento que no se encuentre entre los definidos en los procedimientos de

mantenimiento aquí descritos no podrá utilizarse en este instrumento. La extracción de

las tapas y los intentos de ajuste o reparación por parte de personal no cualificado

invalidarán la garantía y pueden incurrir en cargos adicionales por reparación.

4. Siempre deberían consultarse los datos sobre Salud y Seguridad que se suministran con

cualquier producto químico que se utilice. Es necesario llevar a cabo los procedimientos

de laboratorio de aceptación generalizada para la manipulación segura de productos

químicos.

5. Si existe la sospecha de que las medidas protectoras de seguridad han quedado

dañadas en cualquier modo, la unidad debe inutilizarse y protegerse contra toda

operación que se intente llevar a cabo. El estado de fallo debe comunicarse

inmediatamente a la autoridad de servicio de mantenimiento y reparación pertinente.

Model 3520 pH/mV/Temperature Meter

Operating Manual

Contents

Section 1 Introduction

Instrument Description 1.1

Instrument Specification 1.2

Section 2 Installation

Unpacking 2.1

Installation 2.2

Displays/Controls 2.3

Inputs/Outputs 2.4

Section 3 Operation

Theory of pH measurement 3.1

pH Measurement 3.2

Preparation of Buffer Solution 3.3

Solution Temperature Values 3.4

Good Practice Guidelines 3.5

Set-Up Parameters 3.6

pH Calibration 3.7

Error Codes 3.8

mV Mode 3.9

Performing Measurements 3.10

Status Page 3.11

Results Storage and Display 3.12

GLP Functions 3.13

Section 4 Maintenance

General 4.1

Cleaning/Re-conditioning of Glass Electrodes 4.2

Section 5 Optional Accessories

Optional Accessories 5.1

Spares 5.2

Section 6 Interfacing

Analogue 6.1

RS232 6.2

Keypad Emulation 6.3

Printing 6.4

Section 7 Troubleshooting

Troubleshooting 7.1

Functional Checks 7.2

Reset Procedure 7.3

EC Declaration of Conformity

Section 1

Introduction

1.1 Instrument Description

The Model 3520 is a fully specified laboratory pH/mV/Temperature meter that includes full support

for good laboratory practices (GLP). The meter supports 1, 2 or 3 point pH calibration on either

manually entered pH buffers or automatically temperature compensated buffers to DIN, JIS and

NIST standards. Powerful data logging capabilities are included with the ability to store up to 500

readings either manually, at timed intervals or on alarm events.

1.2 Instrument Specification

pH (1, 2 or 3 point cal)

Range: -2.000 to 20.000pH

Resolution: 0.001 / 0.01 / 0.1pH

Accuracy: ±0.003pH

mV (Absolute or Relative)

Range: -1999 to +1999mV

Resolution: 0.1mV

Accuracy: ±0.2mV

Input Impedance: >1012ohms

Temperature Measuring

Ranges: -10 to +105°C / 14 to 221°F

Resolution: 0.1°C / 1°F

Accuracy: ±0.5°C / ±1°F

ATC Range: 0 to 100°C / 32 to 212°F

Manual Temp. Compensation: 0 to 100°C / 32 to 212°F

Auto Buffer Selection: Jenway (2.00, 4.00, 7.00, 9.20 and 10.00)

DIN (3.06, 4.65, 6.79, 9.23, 12.75)

NIST (1.68, 4.01, 6.87, 9.18, 12.45)

JIS (1.68, 4.01, 6.87, 9.18, 12.45) or manually entered buffers

Calibration: User selectable 1, 2 or 3 point

Outputs: Analogue 1mV per 0.01pH

RS232 serial and IrDA printer interface

Alarm - open collector

Clock: 24 hours, hrs/min/sec or day of month/month/year, leap year

corrected (European and American formats)

GLP: Calibration reminder interval (1-999 hours)

Alarm outputs (open collector and audible)

Security code protected user data

Display: Back lit 1/8 VGA monochrome LCD

Languages:English, French, German, Italian, Spanish, Portuguese

Power: Power Supply 9Vac

Size: 275(l)x240(w)x150(d)mm

Weight: 850g

352 050/REV A/03-03

Section 2

Installation

2.1 Unpacking

Remove the Model 3520 from the packaging and ensure the following items are included:

1. Model 3520 pH/mV/Temperature Meter

2. Glass bodied combination pH electrode (924 005)

3. ATC probe (027 500)

4. Electrode holder (903 300)

5. 4, 7 and 10pH buffer sachets

6. BNC shorting plug (009 146)

7. Power Supply (as specified at time of ordering the product)

8. Condensed operating instructions (352 051)

9. Operating Manual (352 050)

Any shortages or damage should be reported immediately to the manufacturer or your local

distributor.

2.2 Installation

The Model 3520 is supplied ready to use. Connect the ATC (if required) and the pH electrode to the

rear panel Temp and pH sockets.

The unit should be placed on a clean flat surface which is free from drafts and vibrations. The units

are designed for operation on 120V to 240V AC input at 50 to 60Hz.

Connect the power supply unit to the power inlet socket on the rear panel of the instrument and

connect to the mains socket. Turn the power on at the mains and switch the instrument on using

the power switch on the front of the instrument.

Do not position the product so that it is difficult to disconnect from the mains supply using the

mains plug.

The mains outlet socket used should be located close to the equipment and readily identifiable

and accessible to users.

Fig. 2.2.1 Electrode Holder Assembly

The electrode stand requires minimal assembly (refer to the diagram below).

352 050/REV A/03-03

2.3 Display

Fig. 2.3.1 – Display

1. Primary display – 4½ digit. Provides direct readout in pH and millivolts of samples and

standards.

2. Mode annunciators – shows selected measurement mode; pH, mV (Absolute and Relative).

3. Secondary display – 3½ digit display. Provides direct readout of automatic or manual

temperature.

4. Mode annunciators – indicates temperature in °C or °F and whether the measurements are

manually temperature compensated (MAN symbol).

5. Endpoint symbol – this symbol is displayed when an endpoint has been detected.

6. Mode tags – Each mode tag is highlighted when selected; SETUP, MODE (pH or mV),

STATUS or RESULTS. If a double headed arrow symbol is present this indicates that the

mode can be changed to an alternative option (pH/mV).

7. Real time clock - will display either date or time.

8. The following symbols will appear along the display:

Padlock - Set up parameters security locked

Notepad symbol - data logging to internal memory

IrDA status

Alarm indication - an Up arrow refers to Hi alarm / a Down arrow refers to Low alarm

352 050/REV A/03-03

2.4 Keypad

2.4.1 Keypad

1. ESC used to switch the instrument on and to place into standby mode (only if power

supply lead remains connected to the instrument). Also used to escape/exit a

mode.

2. CAL / CLR used to select and perform a calibration sequence. This key is also used to clear

readings from Memory. Used to select Abs/Rel mV in mV mode.

3. Print key used to initiate a print.

4. Up Arrow used for adjustment during set up, to scroll results and to toggle between mV and

pH modes.

Down Arrow used for adjustment during set up, to scroll results and to toggle between mV and

pH modes.

Left Arrow used for adjustment during set up and to move between mode tags.

Right Arrow used for adjustment during set up and to move between mode tags.

STO used to accept an entered value in set-up mode and to instigate a stored reading.

This key can also be used as a CAL key during calibration.

352 050/REV A/03-03

2.5 Inputs/Outputs

Fig. 2.5.1 – Rear panel layout

1. Ref Socket 2mm pin socket. Connection socket for separate reference electrode. When

performing measurements with some pH and ion selective electrodes a separate

reference electrode is needed.

2. pH Socket BNC type socket which allows combination pH or redox electrodes to be used.

3. Temp Socket 8 pin mini-DIN socket. This allows the optional Automatic Temperature

Compensation (ATC) probe to be connected.

4. Alarm Output 2 x 4mm sockets. Open collector alarm outputs.

Red for Hi / Black for Low.

5. Printer Socket 9 way socket for RS232 and IrDA connection.

6.Power In

AC 9V I/P socket. 2.1 x 5.5mm socket allowing the power supply to be connected

to the instrument.

7. Analog Out 2x4mm sockets. Analogue output (buffered electrode potential).

352 050/REV A/03-03

Section 3

Operation

3.1 Theory of pH Measurement

pH is a unit of measurement which defines the degree of acidity or alkalinity of a solution. It is

measured on a scale of 0 to 14. The pH value quantifies the degree of hydrogen ion activity of an

acid or a base.

The internationally accepted symbol, pH, is derived from “p”, the mathematical symbol of the

negative logarithm and “H”, the chemical symbol for Hydrogen. The pH value is the negative

logarithm of Hydrogen ion activity as shown in the mathematical relationship pH= -log[H+].

The pH value of a substance is directly related to the ratio of the Hydrogen ion [H+] and the Hydroxyl

ion [OH-] concentrations. If the concentration of H+ is greater than OH-, the material is acidic and

has a pH value of less than 7. Conversely, if the concentration of OH- is greater than H+ the material

is basic, with a pH value greater than 7. If the concentrations of H+and OH- are equal the material is

neutral with a pH value of 7.

It can, therefore, be seen that pH is a measurement of both acidity and alkalinity, even though by

definition it is a selective measurement of hydrogen ion activity. The logarithmic relationship

between hydrogen ion concentration and the pH unit means that a change of one pH unit

represents a ten-fold change in hydrogen ion concentration.

3.2 pH Measurement

pH can be measured by using either pH papers/indicators or a pH meter, dependent on the level of

accuracy required. pH papers or indicators change colour as the pH level varies. These can be

used as a guide to the pH level, but can be limited in accuracy and difficult to interpret correctly in

murky or coloured samples.

For greater accuracy the use of a high impedance pH meter is recommended, together with a pH

measuring electrode and reference electrode.

Each component part of the measurement system can be described as follows:

a) the pH meter – is a high impedance amplifier used to accurately measure the minute electrode

voltages produced. The pH meter will display the results directly in pH units on either an analogue

or digital display. Voltages can also be read for special applications, ORP (Oxidation-Reduction

Potential) measurements or with Ion Selective Electrodes.

b) the pH electrode – is a hydrogen ion sensitive glass bulb, with a millivolt output that varies with

the changes in the relative hydrogen ion concentration inside and outside of the bulb. The pH

electrode has very high internal resistance, making the voltage change with pH difficult to measure.

The input impedance of the pH meter and leakage resistances are therefore important factors.

c) the reference electrode – these cells consist of an internal element, usually a silver/silver

chloride wire, electrolyte (KCl) and a liquid junction. The liquid junction provides a leak path for the

internal electrolyte to “weep” into the sample chamber and provide an electrical contact with the

liquid to be measured. If the liquid junction is inefficient then measurement will be inaccurate. It is

common for the reference electrode to be incorporated into the pH electrode. It is then called a

combination electrode. The Model 3520 is supplied with a combination electrode.

352 050/REV A/03-03

The voltage developed by each individual pH electrode in the presence of a known hydrogen ion

concentration is theoretically predictable, but in practise deviations from the theoretical value can be

expected. These deviations will change slowly during the life of an electrode. It is therefore essential

to routinely calibrate the system using solutions with a known and constant pH value. These

solutions are called buffers.

3.3 Preparation of Buffer Solutions

Care must be taken in the preparation of all buffer solutions. The correct quantity of distilled or

deionised water should be used when preparing the solutions. For accurate and repeatable results

it is essential to follow the manufacturers instructions carefully.

3.4 Solution Temperature Values

The value of all buffer solutions varies with solution temperature. For accurate calibration of

electrodes using buffer solutions, it is necessary to measure the temperature of the buffer solution

being used. The unit should then be calibrated to the corrected pH value. Manufacturers of buffer

powders and solutions will provide a table of values at varying temperatures for their buffers.

Note: Buffer solutions will contaminate with exposure to air and should be stored in airtight

containers when not in use. Used solution should be discarded and not returned to the container as

this will cause contamination.

For best results fresh solutions should be prepared prior to calibration.

352 050/REV A/03-03

3.5 Good Practice Guidelines

The types of electrodes are many and various. For the majority of tests carried out on aqueous

solutions, with a reasonable ionic strength; at ambient temperatures and with limited use in strongly

acidic or alkaline solutions, the standard glass or epoxy bodied combination electrode is ideal.

For other applications a more suitable pH/reference electrode pair may be required; details or

advice supplied on request.

The following general guidelines indicate the care and maintenance required for the three main

groups of electrodes (Combination, Reference and pH). For more detailed advice on specific

electrodes contact the electrode manufacturer.

1) After use Rinse thoroughly with deionised water

Short term storage Immerse in pH 4 buffer (all types)

Long term storage Fit wetting cap filled with 3M KCl adjusted to pH 4.

2) Electrodes should be stored a) away from direct sunlight

b) in a vertical position

c) within their specified temperature range

3) Always ensure the electrode is used within its specified temperature range. Degradation of

electrodes used above their specified temperature is rapid and irreversible.

4) Ensure the level of fill solution is above the internal elements in the electrode and that this

level remains above the sample in use.

5) DO NOT touch the sensitive glass pH membrane or reference junction during use. Excess

droplets of solution may be removed by gently blotting with filter paper or tissue. DO NOT rub

the electrode as this may induce an electrostatic charge.

6) Ensure no air bubbles are trapped at the bottom of the electrode. Removal of air bubbles is

possible by holding the electrode vertically and gently tapping the electrode body. Larger

bubbles may be removed by shaking the electrode in a downward direction.

7) During use ensure the electrode is rinsed in deionised water between each measurement to

eliminate risk of contamination of solutions.

8) Ensure that the side port/inlet if present is uncovered, especially during a long run of tests.

9) For samples such as blood, serum or any measurements of Tris buffer solutions the junction

may become badly clogged. For these measurements it is recommended that the Tris buffer

electrode is used (924 030).

10) For applications associated with the measurement of food extracts, it is recommended that

the Food electrode is used (924 051). This will reduce the risk of blockage from fat proteins,

will be easy to clean and is perfect for measurements in agar media. This electrode is also

recommended for measurements where deposits on the electrodes are likely. The flat

surface is easy to clean and robust.

11) For low ionic strength applications the Environmental electrode (924 050) is recommended.

352 050/REV A/03-03

3.6 Set Up Parameters

The following section details the set-up modes available to the user on the main set up menu

screen:

Exit allows the user to exit this menu.

pH Resolution allows the user to select the preferred resolution for the samples under test.

Use the Up/Down arrows on the keypad to scroll between 0.001pH, 0.01pH

and 0.1pH.

mV Resolution allows the user to select the preferred resolution. Use the Up/Down arrows

on the keypad to scroll between 0.1mV and 1mV.

Language enables the selection of the appropriate language – English, French,

German, Italian, Spanish or Portuguese. Use the Up/Down keys to scroll

through the language options.

LCD Brightness (%) enter the value using the keypad. Press the STO key to accept the value.

3.6.1 Instrument Setup

This option will allow the following parameters to be set:

352 050/REV A/03-03

3.6.3 Calibration Set up …

3.6.2 Temperature Setup...

Select the Temperature Setup sub menu by highlighting the option and pressing the STO key. The

following menu will be shown:

Exit enables the user to exit the Setup menu and return to the main set up

screen.

Cal Buffers Used allows selection of 1, 2 or 3 point calibration.

Cal Buffer Set allows selection to be made from the choice of buffer types available:

Auto-Buffer (Jenway), Manual Entry, Auto-Buffer (JIS), Auto-Buffer (NIST) or

Auto-Buffer (DIN).

Manual Cal 1 allows Cal 1 manual buffer value to be set using the Up/Down keys. The

Left/Right arrow keys allow forward and backward movement along the

row of digits. Press the STO key to accept the value.

Manual Cal 2 allows Cal 2 manual buffer value to be set using the Up/Down keys. The

Left/Right arrow keys allow forward and backward movement along the

row of digits. Press the STO key to accept the value.

Manual Cal 3 allows Cal 3 manual buffer value to be set using the Up/Down keys. The

Left/Right arrow keys allow forward and backward movement along the

row of digits. Press the STO key to accept the value.

This option allows the following parameters to be set:

Temp units allows selection of the preferred unit of measurement (either °C or °F) using

the Up/Down keys which toggle between the two units.

Manual temperature allows the manual temperature value to be set. Press the STO key to

accept the value.

352 050/REV A/03-03

3.6.5 G.L.P Setup …

Exit enables the user to exit the Setup menu and return to the main

set up screen.

Cal Reminder can be enabled or disabled by using the Up/Down keys which toggle

between the two settings.

Cal Reminder Interval can be set within the limits of 001 to 999 hours by using the Up/Down

keys.The Left/Right arrow keys allow forward and backward

movement along the row of digits. Press the STO key to accept the

value.

Cal Reminder Audible Alarm can be enabled or disabled by using the Up/Down keys which toggle

between the two settings.

User ID up to a 4 digit code can be set using the Up/Down keys. The Left/

Right arrow keys allow forward and backward movement along the

row of digits. Press the STO key to accept the value

3.6.4 Alarms Setup...

Exit enables the user to exit the Setup menu and return to the main

set up screen.

Alarm Outputs can be enabled or disabled by using the Up/Down keys which toggle

between the two settings.

Audible Alarm Warning can be enabled or disabled by using the Up/Down keys which toggle

between the two settings.

pH Alarm High allows the user to set the high alarm limit up to 20.000 pH.

pH Alarm Low allows the user to set the low alarm limit down to -2.000 pH.

mV Alarm High allows the user to set the high alarm limit up to +1999.9mV.

mV Alarm Low allows the user to set the low alarm limit -1999.9 mV.

3.6.7 Data Logging Set up …

Exit enables the user to exit the Set Up menu and return to the main

set up screen.

Data Log Event can be enabled or disabled by using the Up/Down keys which toggle

between the two settings.

Data Log To allows the data to be sent to Memory or to the external Printer.

Selection is made via the Up/Down keys which toggle between the

two settings.

Batch ID up to a 3 digit code can be set by using the Up/Down keys.The Left/

Right arrow keys allow forward and backward movement along the

row of digits. Press the STO key to accept the value.

3.6.6.Security Setup …

Select the Security Setup sub menu buy highlighting the option and pressing the STO key. The

following menu will be shown:

Exit enables the user to exit the Set Up menu and return to the previous

set up screen.

Data Entry Security can be enabled or disabled by using the Up/Down keys which toggle

between the two settings.

Security Code up to a 3 digit code can be set by using the Up/Down keys.The Left/

Right arrow keys allow forward and backward movement along the

row of digits. Press the STO key to accept the value.

352 050/REV A/03-0312

3.6.8 Printer Setup …

Select the Printer Setup sub menu buy highlighting the option and pressing the STO key. The

following menu will be shown:

Data Log Interval can be set between 00:00:01 and 23:59:59.

Memory Full gives the user to select the Stop (cease storing results and not to

overwrite existing stored information) or Overwrite (overwrite existing

results) options when the memory is full. Selection is made via the

Up/Down keys which toggle between the two settings.

Prompt Before Deleting can be enabled or disabled by using the Up/Down keys which toggle

between the two settings.

Clr Key toggles between Deletes Results Before, Deletes All Results and

Deletes Results Since. Selection is made via the Up/Down keys

which toggle between the four settings.

Exit enables the user to exit the Setup menu and return to the main

instrument display.

Printer Interface toggles between Infrared and Serial. Selection of the preferred option

can be made using the Up/Down keys which toggle between the two

settings.

Serial Printer Baudrate toggles between 9600 and 1200. Selection of the preferred option can

be made using the Up/Down keys which toggle between the two

settings. (Refer Section 6.2).

352 050/REV A/03-03

3.6.9 Endpoint Detection Set up …

3.6.10 Clock Set up …

Select the Clock Setup sub menu buy highlighting the option and pressing the STO key. The

following screens will be shown:

Exit enables the user to exit the Set Up menu and return to the main

instrument display.

Endpoint detection can be enabled or disabled by using the Up/Down keys which toggle

between the two settings.

Endpoint Audible Alarm can be enabled or disabled by using the Up/Down keys which toggle

between the two settings.

Endpoint Stability (Sec) can be set within the limits of 001 to 999 seconds.

Exit enables the user to exit the Setup menu and return to the main

instrument display.

Display toggles between Time and Date. Selection of the preferred option

can be made using the Up/Down keys which toggle between the two

settings.

Date Format toggles between European (DD/MM/YY) and American (MM/DD/YY)

formats. Selection of the preferred option can be made using the Up/

Down keys which toggle between the two settings.

Time allows time to be set (hrs/min/sec) using the Up/Down

keys. The Left/Right arrow keys allow forward and backward

movement along the row of digits. Press the STO key to accept the

setting.

Date allows date to be set (in previously selected format – European or

American) using the Up/Down keys. The Left/Right arrow keys allow

forward and backward movement along the row of digits. Press the

STO key to accept the setting.

352 050/REV A/03-0314

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