Jenway 3540 User Manual

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Model 3540
Combined pH & Conductivity Meter
Operating Manual
Safety
This is important information; please read carefully before installing or using this instrument.
1. The Model 3540 pH/Conductivity meter is only for operation by
personnel who are trained
and
aware of the principles and applications involved in making electrochemical measurements. For
further help and advice please contact your local distributor, e-mail sales@jenway.com
or visit
www.jenway.com
2. The Model 3540 pH/Conductivity meter is a sensitive electronic measuring instrument designed
for use in a laboratory environment. Careful adherence to the installation instructions must be
observed. If in doubt contact a relevant and competent authority for advice before proceeding.
3. In addition to observing the instructions detailed in the Operating Manual and Service Manual for
this instrument all installation, operating and service personnel must be aware of, and employ, a
safe system of work.
4. Voltage levels hazardous to life are present in this instrument, for personal safety only trained
engineers aware of the risk and avoidance of electric shock should remove protective covers from
the instrument.
5. This instrument is designed for minimal maintenance, which must be carried out carefully following
the
procedures detailed in this manual
. All safety instructions in these procedures as well as
those defined locally for the area or environment where the work is being carried out must be
observed.
6. 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 any warranty and incur additional charges for repair.
7. Reference should always be made to the
Health and Safety Data
for any chemicals or reagents
used. All available information, advice and warnings on the handling, storage, use and disposal of
such must be carefully observed. When not available this data must be requested from the
supplier before proceeding in any way.
8. It is important that good laboratory practice is observed when handling samples, chemicals,
reagents and ancillary equipment in order to carry out measurement and analysis with this
instrument. Suitable safety and personal protective equipment must be used at all times.
9. If it is suspected that safety protection has been impaired in any way, the instrument must be
made inoperative and secured against any intended operation. The fault condition must be
reported to the appropriate servicing authority. In all such reports the model number and serial
number of the instrument must be quoted.
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Summary of Contents

Page 1

Model 3540 Combined pH & Conductivity Meter Operating Manual Safety This is important information; please read carefully before installing or

Page 2 - Contents:

11. The temperature coefficient is very dependent on the solution being measured and its concentration level. The effect of temperature change on con

Page 3

Section 2 Getting Started 2.1 Unpacking Remove the 3540 from the packaging and ensure the following items are included: 1. Model 3540 pH/Conducti

Page 4

2.22 Electrode Holder Assembly The electrode holder requires minimal assembly (refer to the diagram below). 4123Decide on which side of the instrum

Page 5

2.2.3 Power Supply, probes and accessory connection Rear Panel showing Input and Output Connectors 1. Ref Socket 2mm-pin type socket. Connecti

Page 6

Section 2.24 Installation Verification 1. Connect the power supply, conductivity cell and ATC probe to the rear panel, as described in the previous

Page 7

Section 3 Set Up - General 3.00 General Set Up The general set up options include instrument wide functions that are relevant for both pH and condu

Page 10

3.10 Instrument Set Up The Instrument Set Up menu contains options for selecting the operating language and adjusting the brightness of the display t

Page 11 - Typical Items supplied

To change the brightness of the display press the down arrow to highlight the LCD Brightness (%) option in the Instrument Set Up screen, then press th

Page 12

Contents: Section 1 Introduction Instrument description 1.1 Display & controls 1.2 Outputs 1.3 Electrode Selection

Page 13

3.20 GLP Set Up The GLP Set Up menu contains options for entering a User ID (4-digit code), a Batch ID (3-digit code) and the Security Code options.

Page 14 - Installation Verification

To change or set a Batch ID, press the down arrow to highlight the Batch ID option in the GLP Set Up screen, then press the Enter key. The highlight w

Page 15 - General Set Up Screen

The following sub-menu is displayed. Security Set Up sub-menu 3.23 Data Entry Security To enable or disable data entry security (as described above

Page 16

3.30 Data Logging Set Up The data logging set up menu enables all the functions of the data logger to be set, including the event trigger, logging pe

Page 17

To change the data logging trigger press the down arrow to highlight Data Log Event in the Data Logging Set Up screen, then press the Enter key. The h

Page 18 - Instrument Set Up screen

To change the data log interval from the default value or to set a new interval press the down arrow to highlight Data Log Interval in the Data Loggin

Page 19

3.35 Prompt Before Deleting Data stored in memory can be deleted by use of the clear [CLR] key on the keypad. If this option is enabled it allows the

Page 20 - GLP Set Up screen

To change the clear key function, press the down arrow to highlight ‘Clr Key’ in the Data Logging Set Up screen, then press the Enter key. The hig

Page 21

3.38 Print Channel This enables the print data to be configured so that just conductivity, just pH or conductivity and pH results are printed, reducin

Page 22 - Security Set Up sub-menu

3.43 Time Setting To adjust the time (see warning in paragraph 3.40) Press the down arrow to highlight the Time option in the Clock Set Up screen. Th

Page 23 - Data Logging Set Up screen

Section 9 Accessories and Spares Optional accessories 9.1 Spares 9.2 Section 10 Specification & Data Technical s

Page 24

Section 4 Conductivity Set Up 4.00 General Set Up The conductivity set up options include settings for all the functions that are relevant for the

Page 27 - Printer Set Up screen

4.10 Conductivity Calibration Set Up The conductivity calibration set up menu contains options for setting the Cell Constant (K factor), the EC ratio

Page 28 -

4.12 EC Ratio Setting The EC ratio is the factor that calculates the TDS value from the conductivity measurement. There are a number of different int

Page 29

Should you require to change the temperature co-efficient press the down arrow key to highlight Temperature Co-efficient (%) in the Conductivity Calib

Page 30 - Conductivity Set Up screen

4.16 Calibration Standard Set up A sub-menu for the selection of calibration standards, including the manual or automatic recognition of from one to

Page 31

Press the down arrow in the Conductivity Calibration Set Up sub menu to highlight the Cal 1 (2 or 3) Buffer(mS) option. Press the Enter key to move th

Page 32

To select the sub-menu for setting the Calibration Reminder options press the up or down arrow key to highlight Calibration Reminder Set up… in the Co

Page 33

Cal Reminder Audible Alarm When the cal reminder interval has elapsed a visual warning is displayed in place of the relevant reading, to enhance this

Page 34

Section 1 Introduction 1.1 Instrument Description The model 3540 pH/conductivity meter is a dual channel, dual readout instrument that displays bot

Page 35

To enable the alarms and set the relevant high and low alarm levels press the down arrow key in the Conductivity Set Up menu to highlight Alarms Set U

Page 36

4.23 Alarm Point Settings… A sub-menu for setting the high and low alarm points for each mode can be accessed by pressing the down arrow in the Alarm

Page 37

icon will then be displayed and an optional audible alarm can be enabled. The period over which the instrument looks for stability can be adjusted for

Page 38

4.33 Endpoint Stability (Sec) The endpoint algorithm looks for a reading that is stable, within a certain window of variation, over a set period of

Page 39

Escape key to return to other menu levels or continue with setting the Manual Temperature Compensation value as follows. 4.42 Manual Temperature (oC

Page 40 - Alarms Set Up Menu

Section 5 pH Set up 5.00 The pH set up options include settings for resolution, calibration values and number of buffers as well as alarm settings

Page 43 - Temperature Set Up menu

5.10 pH Resolution The pH display can be set to have a resolution of 0.1pH, 0.01pH or 0.001pH depending on your application and regulatory/reporting r

Page 44

5.30 Calibration Set Up A separate sub-menu is available for entering and setting calibration data. To access this sub-menu press the down arrow key

Page 45

1.2 Display and Controls The model 3540 has a back lit 1/8 VGA dot matrix LCD. In normal measurement mode the left-hand side displays the conductivi

Page 46

Selecting the Manual option enables alternative buffers to be used by entering their respective values as the Manual Cal 1 to 3 Buffers in this sub-me

Page 47

right or left arrow keys can be used to move the highlight to the other digits which in turn can be set, with the up or down arrow keys, to the desire

Page 48

calibration reminder interval can be set from 1 hour to 999 hours and can only be cleared by carrying out a new calibration. To set the calibration re

Page 49

An output from the rear panel sockets is also available to switch external audio/visual alarms or for simple control/telemetry functions via external

Page 50

when it is highlighted on the display. Then use the ESC key to return to other menu levels, the main measurement screen or continue with the alarms s

Page 51 - Calibration Reminder menu

the Enter key to accept this value. Use the up or down arrow key to adjust other alarm settings as required or press the ESC key to escape to other me

Page 52

5.46 Endpoint Audible Alarm To complement and re-enforce the display of the endpoint icon an audible alarm can be enabled to indicate a reading reach

Page 53

5.48 pH ATC/MTC Set Up Temperature measurement and compensation processes are carried out automatically during measurement procedures. However adjust

Page 54 - Setting the pH High Alarm

Section 6 Calibration 6.10 pH Calibration Up to three calibration points may be used during a pH calibration procedure. Auto-buffers may be selected

Page 55

The prompts in the preceding display request the first point of a three point calibration (1 / 3) indicating that the current buffer is 7.015 at 21.6o

Page 56

The Enter key confirms selections as they are made in the set up menus. With the measurement screen displayed it acts as the Store [STO] key and store

Page 57

The display now changes to request the third buffer (3 / 3), rinse the electrode with de-ionised water and blot up any excess with clean, soft tissue,

Page 58

6.20 Conductivity Calibration There are three methods for calibrating the conductivity channel. The simplest is by setting the cell constant (K factor

Page 59

careful re-calibration against precision standards a new cell constant can be determined after a period of use. To calibrate against a known cell co

Page 60

Details and prompts are shown in the Icon bar throughout the calibration procedure. The following display shows the first point in a three point calib

Page 61

If a two-point calibration has been selected then the main measurement screen is returned at this point. The display now changes to request the third

Page 62

Section 7 Measurements 7.1 pH and Conductivity Measurement Following successful calibration of one or both channels, measurement is simply carried

Page 63

7.20 mV Measurement The mV measurement mode can be used for Redox (ORP) measurement as well as probe diagnostics. The mV mode can be accessed by pre

Page 64

An example screen of stored results To review stored results use the right or left arrow key to highlight the Results tab. See section 3.3 for detai

Page 65

An example screen of stored results To review stored results use the right or left arrow key to highlight the Results tab. See section 3.3 for detai

Page 66

Maintenance & Troubleshooting 8.1 General The Model 3540 is designed to give optimum performance with minimum maintenance. It is only necessar

Page 67

1.5 Good Practice Guidelines – pH 1. Selection of the correct electrode for your application is the most important factor in achieving good perform

Page 68

8.3 Troubleshooting - pH Fault Possible Cause Action No display Check power supply Check that correct 9V ac power supply is connecte

Page 69

8.4 Troubleshooting - Conductivity Fault Possible Cause Action No display Check power supply Check that correct 9V ac power supply i

Page 70

8.60 Functional Check – Conductivity A simple but effective method for checking the conductivity channel can be made with two 10K ohm resistors. One

Page 71

conductivity reading should be between 180 and 220µS depending on the last calibration or cell constant setting – if in doubt set the cell constant to

Page 72 - Resistors in

Section 9 Optional Accessories 9.1 Accessories The following items are available as optional accessories: 060 406 Dust cover 037 701 IrDA/Serial

Page 73 - 10K ohm resistor

Miscellaneous 025 160 3M KCl electrode fill solution (100ml) 025 161 Electrode cleaning solution (500ml) Conductivity Calibration Standards 025 1

Page 74

Section 10 Specification & Data 10.1

Page 75

10.2 Analogue Output The Model 3540 is provided with 2 x 4mm sockets, marked as Analog O/P on the rear panel. The level is proportional to the displa

Page 76

Setting of these options is detailed in Section 3.37 and 3.38 The Model 3540 supports both hardware (CTS/RTS) flow control and software XON/XOFF fl

Page 77

Most recent calibration information Eo value Slope efficiency Buffer type This will also be followed by result data dependent on the mode selected. T

Page 78

13. Storage conditions can have a greater impact on electrode performance and operational life than sample type. Store only as directed in the instr

Page 79

Addendum pH Auto-Buffer & Conductivity Auto-Standard Sets Ad.1 Jenway Auto-Buffer Set Temperature 0oC 10oC 20oC 25oC 30oC 40oC 50oC 60oC

Page 80

EC Declaration of Conformity JENWAY Model 3540 pH/Conductivity Meter complies with the following European Standards: EN 50081-1:1992 electromagneti

Page 81

1.6 Good Practice Guidelines – Conductivity 1. After using the conductivity probe ensure it is rinsed thoroughly, or cleaned then rinsed if used in

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