Jenway 4520 Instruction Manual

Model 4520

Conductivity/TDS Meter

Operating Manual

452 050/REV A/03-03

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

1. The unit described in this manual is designed to 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. 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.

4. 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.

452 050/REV A/03-03

Conductivity/TDS 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 2.3 Controls 2.4 Inputs/Outputs 2.5

Section 3 Operation

Good Practice Guidelines 3.1 Set Up Parameters 3.2 Preparation of Conductivity Standards 3.3 Calibration with Known Cell Constant 3.4 Calibration with Standard Solution 3.5 Sample Measurement 3.6

Model 4520

Section 4 Maintenance

General 4.1

Section 5 Optional Accessories

Optional Accessories 5.1

Section 6 Interfacing

Analogue 6.1 RS232 6.2 Keypad Emulation 6.3 Printing 6.4 Alarm Outputs 6.5

Section 7 Troubleshooting

Troubleshooting 7.1

EC Declaration of Conformity

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Section 1

Introduction

1.1 Instrument Description

A fully specified laboratory Conductivity/Resistivity/TDS/Salinity/Temperature meter that includes full support for good laboratory practices (GLP). The meter supports 1, 2 or 3 point conductivity calibration. Powerful data logging capabilities are included with the ability to store up to 500 readings either manually, at timed intervals or alarmed events.

1.2 Instrument Specifications

Conductivity

Ranges 0 to 19.99µS / 0 to 199.9µS / 0 to 1999µS /

0 to 19.99mS / 0 to 199.9mS / 0 to 1999mS / 0 to 19.99S*

Resolution 0.01µS / 0.1µS / 1µS / 0.01mS / 0.1mS / 1mS / 0.01S*

*only with cell constant >5

Accuracy ±0.5%±2 digits

TDS

Ranges 0 to 19.99mg/l / 0 to 199.9mg/l / 0 to 1999mg/l /

0 to 19.99g/l / 0 to 199.9g/l / 0 to 1999g/l

Resolution 0.01mg/l / 0.1mg/l / 1mg/l / 0.01g/l / 0.1g/l / 1g/l*

*only with cell constant >5

Accuracy ±0.5%±2 digits

Temperature

Range -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. Comp. Range 0 to 100°C (32 to 212°F) 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 Display 3½ digit LCD Power 9V power supply Size 210x250x55mm Weight 850g

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Section 2

Installation

2.1 Unpacking

Remove the Model 4520 from the packaging and ensure the following items are included:

1. Model 4520 Conductivity/TDSMeter

2. Glass bodied conductivity cell with ATC K=1 (027 013)

3. Electrode holder

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

5. Condensed operating instructions (452 051)

6. Operating Manual (452 050) The electrode stand requires minimal assembly (refer to the diagram below). Any shortages or damage should be reported immediately to the manufacturer or your local

distributor.

2.2 Installation

The Model 4520 is supplied ready to use. Connect the conductivity cell to the rear panel DIN socket. The electrode stand requires minimal assembly (refer to the diagram below).

Fig. 2.2.1 Electrode Holder Assembly

452 050/REV A/03-03

2.3 Displays

1. Primary display – 4½ digit. Provides direct readout in Conductivity and TDS of samples and standards.

2. Mode annunciators – shows selected measurement mode; Conductivity or TDS.

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, 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

452 050/REV A/03-03

2.4 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.

3. Print key used to initiate a print.

4. Up Arrow used for adjustment during set up, to scroll results and to toggle between Conductivity (µS or mS) and TDS (mg/l or g/l) modes.

5. Down Arrow used for adjustment during set up, to scroll results and to toggle between Conductivity µS or mS) and TDS (mg/l or g/l) modes.

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

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

8. 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.

452 050/REV A/03-03

2.5 Inputs/Outputs

2.5.1 Rear panel layout

1. Conductivity Socket 7 pin DIN socket which allows the conductivity cell to be connected.

2. Alarm Out 2 x 4mm sockets. Open collector alarm output.

3. Output Socket 9 way connection for RS232.

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

connected to the instrument.

5. Analog Out 2 x 4mm sockets. Analogue output (buffered electrode potential).

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Section 3

Operation

3.1 Good Practice Guidelines

1. For greatest accuracy ensure no particulate matter is suspended in the solution under test. If

necessary, filter or allow the particles to settle prior to use. Do not allow the cell to come into contact with any sediment which may be present.

2. Ensure no air bubbles are trapped in the cell area between the plates.

3. Ensure the cell plates are completely immersed in the solution under test.

4. Thoroughly rinse the cell plates in deionised water after use, and for short term storage

immerse the cell in deionised water. Although it is not essential to store the conductivity cell with the plates in a wetted condition, if they are allowed to dry out completely, initial stability on re-use may be impaired until the cell plates become re-wetted.

5. Do not attempt to clean the cell plates as this will remove the black platinization and alter the

calibration and accuracy of the probe. If the cell plates become worn or damaged the plates should be re-platinised and the cell constant recalculated.

6. Ensure no salt deposits or particulate matter are allowed to build up around the cell plates or

on the probe body as this may produce a conductivity path lower than that through the solution. It is recommended that such deposits be removed by soaking the cell in deionised water. No attempt should be made to wipe off these deposits as this may cause damage to the cell plates.

7. Ensure the correct reference temperature is selected for the operating procedures being

used.

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