OPERATING MANUAL

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332
0

pH/Cond 3320
METER FOR 2 SENSORS (PH/ORP/COND)
 pH/Cond 3320

For the most recent version of the manual, please visit

www.WTW.com.

Copyright © 2018 Xylem Analytics Germany GmbH

Printed in Germany..

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pH/Cond 3320 Contents

pH/Cond 3320 - Contents

1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1 pH/Cond 3320 meter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1 Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1.1 Safety information in the operating manual . . . . . 9
2.1.2 Safety signs on the meter . . . . . . . . . . . . . . . . . . 9
2.1.3 Further documents providing safety information . 9
2.2 Safe operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2.2 Requirements for safe operation . . . . . . . . . . . . 10
2.2.3 Unauthorized use . . . . . . . . . . . . . . . . . . . . . . . . 10

3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1 Scope of delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 Power supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3.1 Inserting the batteries. . . . . . . . . . . . . . . . . . . . . 12

4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 General operating principles . . . . . . . . . . . . . . . . . . . . . . 13
4.1.1 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1.3 Status information (meter) . . . . . . . . . . . . . . . . . 14
4.1.4 Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2 Switching on the meter . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3 Switching off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.4 Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.4.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . 16
4.4.2 Measured value display . . . . . . . . . . . . . . . . . . . 17
4.4.3 Menus and dialogs . . . . . . . . . . . . . . . . . . . . . . . 17
4.4.4 Elements in menus and dialogs . . . . . . . . . . . . . 17
4.4.5 Navigation example 1:Setting the language. . . . 18
4.4.6 Example 2 on navigation: Setting the date
and time ............................ 20
4.5 Channel display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.5.1 Display of several sensors in the measuring
mode ............................ 22

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Contents pH/Cond 3320

5 pH value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1.1 Measuring the pH value . . . . . . . . . . . . . . . . . . . 23
5.1.2 Measuring the temperature. . . . . . . . . . . . . . . . . 24
5.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.2.1 Why calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.2.2 When do you have to calibrate? . . . . . . . . . . . . . 25
5.2.3 Automatic calibration (AutoCal) . . . . . . . . . . . . . 25
5.2.4 Manual calibration (ConCal) . . . . . . . . . . . . . . . . 28
5.2.5 Calibration points . . . . . . . . . . . . . . . . . . . . . . . . 31
5.2.6 Calibration data. . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.2.7 Continuous measurement control (CMC
function) ............................. 35

6 ORP voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.1.1 Measuring the ORP . . . . . . . . . . . . . . . . . . . . . . 36
6.1.2 Measuring the temperature. . . . . . . . . . . . . . . . . 37
6.2 ORP calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

7 Ion concentration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7.1.1 Measuring the ion concentration . . . . . . . . . . . . 38
7.1.2 Measuring the temperature. . . . . . . . . . . . . . . . . 39
7.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
7.2.1 Why calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . 40
7.2.2 When to calibrate? . . . . . . . . . . . . . . . . . . . . . . . 40
7.2.3 Calibration (ISE Cal) . . . . . . . . . . . . . . . . . . . . . . 40
7.2.4 Calibration standards . . . . . . . . . . . . . . . . . . . . . 43
7.2.5 Calibration data. . . . . . . . . . . . . . . . . . . . . . . . . . 43

8 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
8.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
8.1.1 Measuring the conductivity . . . . . . . . . . . . . . . . . 45
8.1.2 Measuring the temperature. . . . . . . . . . . . . . . . . 46
8.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
8.2.1 Why calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . 47
8.2.2 When to calibrate? . . . . . . . . . . . . . . . . . . . . . . . 47
8.2.3 Determining the cell constant (calibration in
control standard) ...................... 47
8.2.4 Calibration data. . . . . . . . . . . . . . . . . . . . . . . . . . 48

9 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
9.1 Measurement settings . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
9.1.1 Settings for pH measurements . . . . . . . . . . . . . . 50
9.1.2 Buffer sets for calibration . . . . . . . . . . . . . . . . . . 51

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pH/Cond 3320 Contents

9.1.3 Calibration interval . . . . . . . . . . . . . . . . . . . . . . . 53

9.1.4 Settings for ORP measurements . . . . . . . . . . . . 54
9.1.5 Settings for ISE measurements . . . . . . . . . . . . . 55
9.1.6 Settings for conductivity measuring cells . . . . . . 57
9.1.7 Calibration interval . . . . . . . . . . . . . . . . . . . . . . . 59
9.1.8 Temperature compensation . . . . . . . . . . . . . . . . 59
9.1.9 Setting the TDS factor . . . . . . . . . . . . . . . . . . . . 60
9.2 Sensor-independent settings . . . . . . . . . . . . . . . . . . . . . 61
9.2.1 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
9.2.2 Data storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
9.2.3 Automatic Stability control . . . . . . . . . . . . . . . . . 62
9.3 Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
9.3.1 Resetting the measurement settings. . . . . . . . . 63
9.3.2 Resetting the system settings . . . . . . . . . . . . . . 64

10 Data memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
10.1 Manual storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
10.2 Automatic data storage at intervals .............. 67
10.3 Measurement data memory . . . . . . . . . . . . . . . . . . . . . . 69
10.3.1 Editing the measurement data memory . . . . . . . 69
10.3.2 Erasing the measurement data memory . . . . . . 71
10.3.3 Measurement dataset . . . . . . . . . . . . . . . . . . . . 71
10.3.4 Memory locations . . . . . . . . . . . . . . . . . . . . . . . . 71

11 Transmitting data (USB interface). . . . . . . . . . . . . . . . 72

11.1 Options for data transmission . . . . . . . . . . . . . . . . . . . . . 72
11.2 Connecting a PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
11.3 MultiLab Importer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

12 Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . 74

12.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
12.1.1 General maintenance activities . . . . . . . . . . . . . 74
12.1.2 Replacing the batteries . . . . . . . . . . . . . . . . . . . 74
12.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
12.3 Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
12.4 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
12.4.1 ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
12.4.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

13 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
13.1 pH/ORP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
13.2 ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
13.3 Conductivity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
13.4 General information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

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Contents pH/Cond 3320

14 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
14.1 Measuring ranges, resolution, accuracy . . . . . . . . . . . . . 82
14.1.1 pH/ORP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
14.1.2 ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
14.1.3 Cond . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
14.2 General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

15 Firmware update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

16 Glossary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

17 Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

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pH/Cond 3320 Overview

1 Overview
1.1 pH/Cond 3320 meter
The pH/Cond 3320 meter enables you to perform measurements (pH, U, ISE,
conductivity) quickly and reliably.
The pH/Cond 3320 provides the maximum degree of operating comfort, reli-
ability and measuring certainty for all applications.

332
0

1 Keypad
2 Display
3 Connectors

1.2 Sensors
A measuring system ready to measure consists of the pH/Cond 3320 meter
and a suitable sensor.

Suitable sensors are pH electrodes, ion selective electrodes, ORP electrodes

and conductivity measuring cells.
Suitable sensors are pH electrodes, ion selective electrodes (ISE) and ORP
electrodes.

Information on available sensors is given on the Internet and in the

WTW catalog, "Laboratory and field instrumentation".

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Overview pH/Cond 3320

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pH/Cond 3320 Safety

2 Safety
2.1 Safety information

2.1.1 Safety information in the operating manual

This operating manual provides important information on the safe operation of

the meter. Read this operating manual thoroughly and make yourself familiar
with the meter before putting it into operation or working with it. The operating
manual must be kept in the vicinity of the meter so you can always find the infor-
mation you need.
Important safety instructions are highlighted in this operating manual. They are
indicated by the warning symbol (triangle) in the left column. The signal word
(e.g. "CAUTION") indicates the level of danger:

WARNING
indicates a possibly dangerous situation that can lead to seri-
ous (irreversible) injury or death if the safety instruction is not
followed.

CAUTION
indicates a possibly dangerous situation that can lead to
slight (reversible) injury if the safety instruction is not fol-
lowed.

NOTE
indicates a possibly dangerous situation where goods might be damaged
if the actions mentioned are not taken.

2.1.2 Safety signs on the meter

Note all labels, information signs and safety symbols on the meter and in the
battery compartment. A warning symbol (triangle) without text refers to safety
information in this operating manual.

2.1.3 Further documents providing safety information

The following documents provide additional information, which you should

observe for your safety when working with the measuring system:
• Operating manuals of sensors and other accessories
• Safety datasheets of calibration or maintenance accessories (such as buffer
solutions, electrolyte solutions, etc.)

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Safety pH/Cond 3320

2.2 Safe operation

2.2.1 Authorized use

This meter is authorized exclusively for pH, ISE, ORP and conductivity
measurements in a field and laboratory environment.
This meter is authorized exclusively for pH, ISE and ORP measurements in a
field and laboratory environment.

Only the operation and running of the meter according to the instructions and
technical specifications given in this operating manual is authorized (see
section 14 TECHNICAL DATA, page 82).
Any other use is considered unauthorized.

2.2.2 Requirements for safe operation

Note the following points for safe operation:

• The meter may only be operated according to the authorized use specified
above.
• The meter may only be supplied with power by the energy sources
mentioned in this operating manual.
• The meter may only be operated under the environmental conditions
mentioned in this operating manual.
• The meter may only be opened if this is explicitly described in this operating
manual (example: Inserting the batteries).

2.2.3 Unauthorized use

The meter must not be put into operation if:

• it is visibly damaged (e.g. after being transported)
• it was stored under adverse conditions for a lengthy period of time (storing
conditions, see section 14 TECHNICAL DATA, page 82).

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pH/Cond 3320 Commissioning

3 Commissioning
3.1 Scope of delivery
 MeterpH/Cond 3320
 4 batteries 1.5 V Mignon type AA
 Short instructions
 CD-ROM with
– USB drivers
– detailed operating manual
– Software MultiLab Importer

3.2 Power supply

The pH/Cond 3320 is supplied with power in the following ways:
 Battery operation (4 x alkaline manganese batteries, type AA)
 USB operation via a connected USB-B cable

3.3 Initial commissioning

Perform the following activities:
 Insert the supplied batteries
 Switch on the meter
(see section 4.2 SWITCHING ON THE METER, page 15)
 Set the date and time
(see section 4.4.6 EXAMPLE 2 ON NAVIGATION: SETTING THE DATE AND TIME,
page 20)

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Commissioning pH/Cond 3320

3.3.1 Inserting the batteries

1 Screws
2 Battery compartment

CAUTION
Make sure that the poles of the batteries are positioned cor-
rectly.
The ± signs on the batteries must correspond to the ± signs in
the battery compartment.

You can operate the meter either with normal batteries or with
rechargeable batteries (Ni-MH). In order to charge the batteries, an
external charging device is required.

1. Place four batteries (type Mignon AA) in the battery compartment.

2. Close the battery compartment.
3. Set the date and time
(see section 4.4.6 EXAMPLE 2 ON NAVIGATION: SETTING THE DATE AND TIME,
page 20).

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pH/Cond 3320 Operation

4 Operation
4.1 General operating principles

4.1.1 Keypad

In this operating manual, keys are indicated by brackets <..> .

The key symbol (e.g. <ENTER>) generally indicates a short keystroke (under
2 sec) in this operating manual. A long keystroke (approx. 2 sec) is indicated
by the underscore behind the key symbol (e.g. <ENTER _ >).

<F1>: Softkeys providing situation dependent functions, e.g.:

F1
<F1 _
>: <F2>/[USB output]:
<F2>: Outputs data to the USB interface
F2
<F2 _
>: <F2 _ >/[USB output]:
Configures the automatic data output to the USB inter-
face
<On/Off>: Switches the meter on or off

<M>: Selects the measured parameter / Quits the settings

<CAL>: Calls up the calibration procedure

<CAL_ >: Displays the calibration data
<STO>: Saves a measured value manually
<STO_ >:
STO
Opens the menu for the automatic save function
<RCL>: Displays the manually stored measured values
<RCL_ >:
RCL
Displays the automatically stored measured values

Menu control, navigation

<>< >: Increments, decrements values
< _>< _>: Increments, decrements values continuously

<ENTER>: Opens the menu for measurement settings / confirms

<ENTER _
>: entries
Opens the menu for system settings

AR <AR> Freezes the measured value (HOLD function)

Switches the AutoRead measurement on or off

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Operation pH/Cond 3320

4.1.2 Display

4
3 5

pH
2
6.093
25.0 °C 6
1 AutoCal TEC 7
HOLD AR 8
15.02.2014
14:15
USB output 9

1 Status information (sensor)

2 Measured value (with unit)
3 Measured parameter
4 Continuous measurement control (CMC function)
5 Channel display: Plug position of the sensor
6 Sensor symbol (calibration evaluation, calibration interval)
7 Measured temperature (with unit)
8 Status information (meter)
9 Softkeys and date + time

4.1.3 Status information (meter)

AR Stability control (AutoRead) is active

HOLD Measured value is frozen (<AR> key)
Batteries are almost empty

Data are automatically output to the USB-B interface at

intervals

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pH/Cond 3320 Operation

4.1.4 Connectors

5 1 2 4 3
1 pH/ISE electrode
2 Temperature sensor
3 Conductivity measuring cell
4 Mini USB-B interface
5 Service interface

CAUTION
Only connect sensors to the meter that cannot return any volt-
ages or currents that are not allowed (> SELV and > current
circuit with current limiting).
Almost all customary sensors fulfill these conditions.

4.2 Switching on the meter

1. Switch the meter on with <On/Off>.

The meter performs a self-test.
The display shows the manufacturer's logo while the self-test is being
performed.
The measured value display appears.

pH
6.949
25.0 °C

15.02.2014
Menu 14:15

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Operation pH/Cond 3320

4.3 Switching off

1. Switch the printer off with <On/Off>.

Automatic shut-off The instrument has an automatic shut-off function in order to save the batteries
function (see section 9.2.1 SYSTEM, page 61). The automatic shut-off function switches
off the meter if no key is pressed for an adjustable period.
The automatic shut-off function is not active
 if the communication cable is connected
 if the Automatic data storage function is active, or with automatic data trans-
mission

Display illumination The meter automatically switches off the display illumination if no key is
pressed for 30 seconds. The illumination is switched on with the next keystroke
again.
You can also generally switch the display illumination on or off (see section
9.2.1 SYSTEM, page 61).

4.4 Navigation
The principles of navigation in menus and dialogs are explained in the following
sections.

4.4.1 Operating modes

The instrument has the following operating modes:

Operating Explanation
mode
Measuring The measurement data of the connected sensor are shown
in the measured value display
Calibration The course of a calibration with calibration information, func-
tions and settings is displayed
Storing in The meter stores measuring data automatically or manually
memory
Transmit- The meter transmits measuring data and calibration records
ting data to a USB-B interface automatically or manually.
Setting The system menu or a sensor menu with submenus, set-
tings and functions is displayed

Only those displays and functions are available in the active operating mode
that are currently being required.

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pH/Cond 3320 Operation

4.4.2 Measured value display

In the measured value display, open the setting menus with <ENTER>. The
current functions of the softkeys are shown on the display.
 Use <ENTER> (short pressure) to open the menu for calibration and mea-
surement settings for the displayed measured parameter.
 Use <ENTER _
> (long keystroke (approx. 2 s) to open the Storage & config
menu with the sensor-independent settings.

Use the keys of the keypad to carry out further functions such as storage or cali-
bration (see section 4.1.1 KEYPAD, page 13). These functions are not available
in other operating situations.

4.4.3 Menus and dialogs

The menus for settings and dialogs in procedures contain further subelements.
 To select a subelement, use the <>< > keys. The current selection is dis-
played with a frame.
 To make further settings, switch to the next higher menu level with
<F1>[Back].
 Use <M> to return to the measured value display.

4.4.4 Elements in menus and dialogs

 Submenus
The name of the submenu is displayed at the upper edge of the frame. Sub-
menus are opened by confirming with <ENTER>. Example:

System
General
Interface
Clock
Service information
Reset

15.02.2014
Back
14:15

 Settings
Settings are indicated by a colon. The current setting is displayed on the
right-hand side. The setting mode is opened with <ENTER>. Subsequently,
the setting can be changed with <>< > and <ENTER>. Example:

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Operation pH/Cond 3320

General
Language: Deutsch
Beep: Off
Illumination: On
Contrast: 50 %
Switchoff time: 1h
Temperature unit: °C
Stability control: On

15.02.2014
Back
14:15

 Functions
Functions are designated by the name of the function. They are immediately
carried out by confirming with <ENTER>.
Example: Display the Calibration record function.

pH
Calibration record
Calibration data storage
Buffer: TEC
One point calibration: Yes
Calibration interval: 7d
Unit for slope: mV/pH

i 2.00 4.01 7.00 10.01 (25 °C)

15.02.2014
Back
14:15

 Messages
Information is marked by the i symbol. It cannot be selected. Example:

pH
Calibration record
Calibration data storage
Buffer: TEC
One point calibration: Yes
Calibration interval: 7d
Unit for slope: mV/pH

i 2.00 4.01 7.00 10.01 (25 °C)

15.02.2014
Back
14:15

4.4.5 Navigation example 1:Setting the language

1. Press the <On/Off> key.

The measured value display appears.
The instrument is in the measuring mode.

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pH/Cond 3320 Operation

pH
6.949
25.0 °C

15.02.2014
Menu
14:15

2. Open the Storage & config menu with <ENTER _ >.

The instrument is in the setting mode.

Storage & config

System
Data storage

15.02.2014
Back
14:15

3. Select the System submenu with <>< >.

The current selection is displayed with a frame.
4. Open the System submenu with <ENTER>.

System
General
Interface
Clock
Service information
Reset

Back 15.02.2014
14:15

5. Select the General submenu with <>< >.

The current selection is displayed with a frame.
6. Open the General submenu with <ENTER>.

ba77054e03 03/2018 19
Operation pH/Cond 3320

General
Language: Deutsch
Beep: Off
Illumination: On
Contrast: 50 %
Switchoff time: 1h
Temperature unit: °C
Stability control: On

15.02.2014
Back
14:15

7. Open the setting mode for the Language with <ENTER>.

General
Language: Deutsch
Beep: Off
Illumination: On
Contrast: 50 %
Switchoff time: 1h
Temperature unit: °C
Stability control: On

15.02.2014
Back
14:15

8. Select the required language with <>< >.

9. Confirm the setting with <ENTER>.
The meter switches to the measuring mode.
The selected language is active.

4.4.6 Example 2 on navigation: Setting the date and time

The meter has a clock with a date function. The date and time are shown in the
measured value display.
When storing measured values and calibrating, the current date and time are
automatically stored as well.
The correct setting of the date and time and date format is important for the fol-
lowing functions and displays:
 Current date and time
 Calibration date
 Identification of stored measured values.

Therefore, check the time at regular intervals.

After a fall of the supply voltage (empty batteries), the date and time
are reset.

20 ba77054e03 03/2018
pH/Cond 3320 Operation

The date format can be switched from the display of day, month, year
(dd.mm.yyyy) to the display of month, day, year (mm/dd/yyyy or mm.dd.yyyy).

1. In the measured value display:

Open the Storage & config menu with <ENTER _ >.
The instrument is in the setting mode.
2. Select and confirm the System / Clock menu with <>< > and
<ENTER>.
The setting menu for the date and time opens up.
3. Select and confirm the Time menu with <>< > and <ENTER>.
The hours are highlighted.

Clock
Date format: dd.mm.yyyy
Date: 15.02.2014
Time: 14:15:25

15.02.2014
Back
14:15

4. Change and confirm the setting with <>< > and <ENTER>.
The minutes are highlighted.
5. Change and confirm the setting with <>< > and <ENTER>.
The seconds are highlighted.
6. Change and confirm the setting with <>< > and <ENTER>.
The time is set.
7. If necessary, set the Date and Date format. The setting is made similarly
to that of the time.
8. To make further settings, switch to the next higher menu level with
[Back]<F1>.
or
Switch to the measured value display with <M>.
The instrument is in the measuring mode.

ba77054e03 03/2018 21
Operation pH/Cond 3320

4.5 Channel display

The pH/Cond 3320 manages the connected sensors and displays which
sensor is plugged to which connection.

Channel display
Display of the plug position
pH for the respective parameter
The filled bar indicates for
6.949 each connected sensor to
which plug position of the
24.8 °C meter it is connected.

15.02.2014
14:15 USB output

4.5.1 Display of several sensors in the measuring mode

The measured values of the connected sensors can be displayed in the follow-
ing ways:
 Clear display of all connected sensors
 Detailed display of one sensor

With the softkey you can very easily switch between the two display types. The
suitable softkey is displayed depending on the operating situation.

pH 6.966 pH
25.0 °C 6.966
ϰ 0.470 1/cm 25.0 °C
25.0 °C

15.02.2014 15.02.2014
USB output USB output
14:15 14:15

22 ba77054e03 03/2018
pH/Cond 3320 pH value

5 pH value
5.1 Measuring

5.1.1 Measuring the pH value

NOTE
When connecting an grounded PC/printer, measurements cannot be
performed in grounded media as the values would be incorrect.
The USB interface is not galvanically isolated.

To ensure the high measurement accuracy of the measuring sys-

tem, always measure with a calibrated electrode (see section 5.2
CALIBRATION, page 25).

1. Connect the pH electrode to the meter.

2. If necessary, select the measured parameter with <M>.
3. When measuring without temperature sensor:
– Temper the test sample, or measure the current temperature.
– Enter the temperature value in the menu.
4. Immerse the pH electrode in the test sample.
The measured value is checked for stability (automatic stability control).
The display of the measured parameter flashes.
5. Wait for a stable measured value.
The display of the measured parameter no longer flashes.

pH
6.949
24.8 °C

15.02.2014
Menu 14:15

Stability control The stability control function (AutoRead) continually checks the stability of the
(AutoRead ) measurement signal. The stability has a considerable impact on the reproduc-
ibility of measured values (see section 9.2.3 AUTOMATIC STABILITY CONTROL,
page 62).
Criteria for a stable The Stability control function checks whether the measured values are stable
measured value

ba77054e03 03/2018 23
pH value pH/Cond 3320

within the monitored time interval.

Measured Time interval Stability in the time interval

parameter
pH value 15 seconds Δ : better than 0.01 pH

Temperature 15 seconds Δ : better than 0.5 °C

The minimum duration until a measured value is assessed as stable is the

monitored time interval. The actual duration is mostly longer.
Freezes the mea- With the HOLD function, you can freeze the current measured value. The dis-
sured value (HOLD played measured value stops changing until you switch the HOLD function off.
function)
1. Freeze the measured value with <AR>.
The [HOLD] status indicator is displayed.
2. Release the frozen measured value again with <AR>.
The HOLD function is switched off.
The [HOLD] status display disappears.

5.1.2 Measuring the temperature

For reproducible pH measurements, it is essential to measure the temperature

of the test sample.
You have the following options to measure the temperature:
 Automatic measurement of the temperature with the temperature sensor
(NTC30 or Pt1000) integrated in the sensor.
 Manual determination and input of the temperature.

The measuring instrument recognizes whether a suitable sensor is connected

and automatically switches on the temperature measurement.
The display of the temperature indicates the active temperature measuring
mode:

Tempera- Resolution of the

ture sensor temp. display Temp. measurement

yes 0.1 °C Automatic with temperature sensor

- 1 °C Manual

If you wish to measure (or calibrate) without temperature sensor, proceed as

follows:

1. Measure the current temperature of the test sample.

2. In the <ENTER>/pH/Man. temperature menu, set the temperature value
with <>< >.

24 ba77054e03 03/2018
pH/Cond 3320 pH value

5.2 Calibration

5.2.1 Why calibrate?

pH electrodes age. This changes the zero point (asymmetry) and slope of the
pH electrode. As a result, an inexact measured value is displayed. Calibration
determines and stores the current values of the zero point and slope of the
electrode.
Thus, you should calibrate at regular intervals.

5.2.2 When do you have to calibrate?

 After connecting a sensor

 Routinely within the framework of the company quality assurance
 When the calibration interval has expired

5.2.3 Automatic calibration (AutoCal)

Make sure that in the sensor menu, Buffer menu, the buffer set is correctly
selected (see 9.1.1 SETTINGS FOR PH MEASUREMENTS, PAGE 50).
Use any one to five buffer solutions of the selected buffer set in ascending or
descending order.
Below, calibration with Technical buffers (TEC) is described. When other buffer
sets are used, other nominal buffer values are displayed. Apart from that, the
procedure is identical.

If single-point calibration was set in the menu, the calibration proce-

dure is automatically finished with the measurement of buffer solu-
tion 1 and the calibration record is displayed.

1. Connect the pH electrode to the meter.

2. When measuring without temperature sensor:
– Temper the buffer solution, or measure the current temperature.
– Enter the temperature value in the menu.
3. In the measured value display, select the measured parameter pH or mV
with <M>.
4. Start the calibration with <CAL>.
The calibration display for the first buffer appears (voltage display).

ba77054e03 03/2018 25
pH value pH/Cond 3320

pH Buffer 1
-180.0 mV

24.8 °C
AutoCal TEC

15.02.2014
14:15

5. Thoroughly rinse the electrode with deionized water.

6. Immerse the electrode in the first buffer solution.
7. When measuring without temperature sensor:
– Temper the buffer solution, or measure the current temperature.
– Enter the temperature value in the menu.
8. Start the measurement with <ENTER>.
The measured value is checked for stability (stability control). The [AR]
status indicator is displayed. A progress bar is displayed and the display
of the measured parameter flashes.

pH Buffer 10.011
-180.0 mV

24.8 °C
AutoCal TEC
AR

15.02.2014
14:15

9. Wait for the end of the measurement with stability control or accept the
calibration value with <ENTER>.
The calibration display for the next buffer appears (voltage display).
10. If necessary, finish the calibration procedure as a single-point calibration
with <M>.
The calibration record is displayed.

For single-point calibration, the instrument uses the Nernst slope

(-59.2 mV/pH at 25 °C) and determines the zero point of the elec-
trode.

Continuing with two-

11. Thoroughly rinse the electrode with deionized water.
point calibration
12. Immerse the electrode in the second buffer solution.

26 ba77054e03 03/2018
pH/Cond 3320 pH value

13. When measuring without temperature sensor:

– Temper the buffer solution, or measure the current temperature.
– Enter the temperature value in the menu.
14. Start the measurement with <ENTER>.
The measured value is checked for stability (stability control). The [AR]
status indicator is displayed. A progress bar is displayed and the display
of the measured parameter flashes.

pH Buffer 7.000
0.0 mV

24.8 °C
AutoCal TEC
AR
15.02.2014
14:15

15. Wait for the measurement with stability control to be completed or termi-
nate the stability control and take over the calibration value with
<ENTER>.
The calibration display for the next buffer appears (voltage display).
16. If necessary, finish the calibration procedure as a two-point calibration
with <M>.
The calibration record is displayed.

Continuing with
17. Thoroughly rinse the electrode with deionized water.
three- to five-point
calibration 18. Immerse the electrode in the next buffer solution.
19. When measuring without temperature sensor:
– Temper the buffer solution, or measure the current temperature.
– Enter the temperature value in the menu.
20. Start the measurement with <ENTER>.
The measured value is checked for stability (stability control). The [AR]
status indicator is displayed. A progress bar is displayed and the display
of the measured parameter flashes.

ba77054e03 03/2018 27
pH value pH/Cond 3320

pH Buffer 4.010
180.0 mV

24.8 °C
AutoCal TEC
AR

15.02.2014
14:15

21. Wait for the measurement with stability control to be completed or termi-
nate the stability control and take over the calibration value with
<ENTER>.
The calibration display for the next buffer appears (voltage display).
22. If necessary, use <M> to finish calibration or
Continue calibrating using the next buffer with <ENTER>.

Calibration is automatically completed after the last buffer of a buf-

fer set has been measured. Then the calibration record is dis-
played.
The calibration line is determined by linear regression.

5.2.4 Manual calibration (ConCal)

Make sure that in the sensor menu, Buffer menu, the ConCal buffer set is
correctly selected (see section 9.1.1 SETTINGS FOR PH MEASUREMENTS, page
50).
Use any one to five buffer solutions in ascending or descending order.

If single-point calibration was set in the menu, the calibration proce-

dure is automatically finished with the measurement of buffer solu-
tion 1 and the calibration record is displayed.

1. Connect the pH electrode to the meter.

The pH measuring window is displayed.
2. When measuring without temperature sensor:
– Temper the buffer solution, or measure the current temperature.
– Enter the temperature value in the menu.
3. In the measured value display, select the measured parameter pH or mV
with <M>.
4. Start the calibration with <CAL>.
The calibration display appears (voltage display).

28 ba77054e03 03/2018
pH/Cond 3320 pH value

pH Buffer 1
0.0 mV

24.8 °C
ConCal

15.02.2014
14:15

5. Thoroughly rinse the electrode with deionized water.

6. Immerse the electrode in the first buffer solution.
7. When measuring without temperature sensor:
– Temper the buffer solution, or measure the current temperature.
– Enter the temperature value in the menu.
8. Start the measurement with <ENTER>.
The measured value is checked for stability (stability control). The [AR]
status indicator is displayed. A progress bar is displayed and the display
of the measured parameter flashes.

pH Buffer 7.000
0.0 mV

24.8 °C
ConCal
AR

15.02.2014
14:15

9. Wait for the end of the measurement with stability control or accept the
calibration value with <ENTER>.
The calibration display for the setting of the nominal buffer value appears.

pH Buffer 1
7.000 


24.8 °C
ConCal

15.02.2014
14:15

10. Set the nominal buffer value for the measured temperature with
< >< >.

ba77054e03 03/2018 29
pH value pH/Cond 3320

11. Accept the set calibration value with <ENTER>.

The calibration display for the next buffer appears (voltage display).
12. If necessary, finish the calibration procedure as a single-point calibration
with <M>.
The calibration record is displayed.

For single-point calibration, the instrument uses the Nernst slope

(-59.2 mV/pH at 25 °C) and determines the zero point of the elec-
trode.

Continuing with two-

13. Thoroughly rinse the electrode with deionized water.
point calibration
14. Immerse the electrode in the second buffer solution.
15. When measuring without temperature sensor:
– Temper the buffer solution, or measure the current temperature.
– Enter the temperature value in the menu.
16. Start the measurement with <ENTER>.
The measured value is checked for stability (stability control). The [AR]
status indicator is displayed. A progress bar is displayed and the display
of the measured parameter flashes.
17. Wait for the measurement with stability control to be completed or termi-
nate the stability control and take over the calibration value with
<ENTER>.
The calibration display for the setting of the nominal buffer value appears.

pH Buffer 2
4.035 


24.8 °C
ConCal

15.02.2014
14:15

18. Set the nominal buffer value for the measured temperature with
< >< >.
19. Accept the set calibration value with <ENTER>.
The calibration display for the next buffer appears (voltage display).
20. Finish the calibration procedure as a two-point calibration with <M>.
The calibration record is displayed.

30 ba77054e03 03/2018
pH/Cond 3320 pH value

Continuing with
21. Thoroughly rinse the electrode with deionized water.
three- to five-point
calibration 22. Immerse the electrode in the next buffer solution.
23. When measuring without temperature sensor:
– Temper the buffer solution, or measure the current temperature.
– Enter the temperature value in the menu.
24. Start the measurement with <ENTER>.
The measured value is checked for stability (stability control). The [AR]
status indicator is displayed. A progress bar is displayed and the display
of the measured parameter flashes.
25. Wait for the measurement with stability control to be completed or termi-
nate the stability control and take over the calibration value with
<ENTER>.
The calibration display for the setting of the nominal buffer value appears.

pH Buffer 3
9.958 


24.8 °C
ConCal

15.02.2014
14:15

26. Set the nominal buffer value for the measured temperature with
< >< >.
27. Accept the set calibration value with <ENTER>.
The calibration display for the next buffer appears (voltage display).
28. Use <M> to finish calibration or
Continue calibrating using the next buffer with <ENTER>.

After the fifth buffer has been measured the calibration is automat-
ically finished. Then the calibration record is displayed.
The calibration line is determined by linear regression.

5.2.5 Calibration points

Calibration can be performed using one to five buffer solutions in any order
(single-point to five-point calibration). The meter determines the following
values and calculates the calibration line as follows:

ba77054e03 03/2018 31
pH value pH/Cond 3320

Determined Displayed calibration data

values
1-point Asy  Zero point = Asy
 Slope = Nernst slope
(-59.2 mV/pH at 25 °C)
2-point Asy  Zero point = Asy
Slp.  Slope = Slp.
3-point to Asy  Zero point = Asy
5-point Slp.  Slope = Slp.
The calibration line is calculated by lin-
ear regression.

You can display the slope in the units, mV/pH or % (see section
9.1.1 SETTINGS FOR PH MEASUREMENTS, page 50).

5.2.6 Calibration data

The calibration record is automatically transmitted to the interface

after calibrating.

Displays the calibra- The calibration record of the last calibration is to be found under the menu item,
tion data <ENTER> / Calibration / Calibration record. To open it, press the <CAL _ > key
in the measured value display.
Subsequently, you can transmit the displayed calibration data to the interface,
e.g. to a PC, with the <F2>/[USB output] key.
Displaying the cali- The calibration records of the last calibrations are to be found in the menu,
bration data memory <ENTER> / Calibration / Calibration data storage.

32 ba77054e03 03/2018
pH/Cond 3320 pH value

Menu item Setting/ Explanation

function
Calibration / Calibra- - Displays the calibration record.
tion data storage /
Display Further options:
 Scroll through the calibration
records with <>< >.
 Output the displayed calibra-
tion record to the interface with
<F2>/[USB output].
 Quit the display with <F1>/
[Back] or <ENTER>.
 Switch directly to the mea-
sured value display with <M>.
Calibration / Calibra- - Outputs the calibration records to
tion data storage / the interface.
Output to USB

Calibration evalua- After calibrating, the meter automatically evaluates the calibration. The zero
tion point and slope are evaluated separately. The worse evaluation of both is taken
into account. The evaluation appears on the display and in the calibration
record.

Display Calibration Zero point Slope [mV/

record [mV] pH]
+++ -15 ... +15 -60.5 ... -58.0

++ -20 ... <-15 >-58.0 ... -57.0

or
>+15 ... +20

+ -25 ... <-20 -61.0 ... <-60.5

or or
>+20 ... +25 >-57.0 ... -56.0

- -30 ... <-25 -62.0 ... <-61.0

or or
>+25 ... +30 >-56.0 ... -50.0

Clean the electrode according to the elec-

trode operating manual
Error Error <-30 oder <-62.0 oder
>+30 >-50.0

Error elimination (see section 13 WHAT TO

DO IF...,page 77)

ba77054e03 03/2018 33
pH value pH/Cond 3320

Calibration record
pH/Cond 3320
(example) Ser. no. 11292113

CALIBRATIONpH
15.02.2014 15:55

AutoCal TEC
Buffer 1 4.01
Buffer 2 7.00
Buffer 3 10.01
Voltage 1 184.0 mV
Voltage 2 3.0 mV
Voltage 3 -177.0 mV
Temperature 1 24.0 °C
Temperature 2 24.0 °C
Temperature 3 24.0 °C
Slope -60.2 mV/pH
Asymmetry 4.0 mV
Sensor +++

etc...

34 ba77054e03 03/2018
pH/Cond 3320 pH value

5.2.7 Continuous measurement control (CMC function)

The Continuous Measurement Control (CMC function) facilitates to evaluate

the current measured value instantly and definitely.
After each successful calibration the scale of the pH measuring range is
displayed in the measured value display. Here you can very clearly see
whether or not the current measured value is in the calibrated part of the
measuring range.
The following information is displayed:

1
2
pH 0 14

6.093
3
4
25.0 °C

15.02.2014
USB output
14:15

1 Measuring range for which a valid calibration is available (white).

Measured values in this range are suitable for documentation.
2 Measuring range for which no valid calibration is available (shaded).
Measured values in this range are not suitable for documentation. If
necessary, calibrate the meter with buffers covering this measuring
range.
If the current measured value is outside the calibrated range, this
area is shaded stronger.
If a measured value is outside the measuring range pH 0 - 14, over-
flow arrows are displayed at the left or right edge of the measuring
range.
3 Currently measured pH value (needle)
4 Marking lines for all nominal buffer values used with the last valid cali-
bration

The limits of the calibrated range are determined by the buffers used for cali-
bration:

Lower limit: Buffer with lowest pH value - 2 pH units

Upper limit: Buffer with highest pH value + 2 pH units

ba77054e03 03/2018 35
ORP voltage pH/Cond 3320

6 ORP voltage
6.1 Measuring

6.1.1 Measuring the ORP

NOTE
When connecting an grounded PC/printer, measurements cannot be
performed in grounded media as the values would be incorrect.
The USB interface is not galvanically isolated.

1. Connect the ORP electrode to the meter.

2. If necessary, select the U (mV) display with <M>.
3. When measuring without temperature sensor:
– Temper the test sample, or measure the current temperature.
– Enter the temperature value in the menu.
4. Rinse the ORP electrode and immerse it in the test sample.
The measured value is checked for stability (automatic stability control).
The display of the measured parameter flashes.
5. Wait for a stable measured value.
The display of the measured parameter no longer flashes.

U
157.0 mV
24.8 °C

15.02.2014
Menu 14:15

Stability control The stability control function (AutoRead) continually checks the stability of the
(AutoRead ) measurement signal. The stability has a considerable impact on the reproduc-
ibility of measured values (see section 9.2.3 AUTOMATIC STABILITY CONTROL,
page 62).
Criteria for a stable The Stability control function checks whether the measured values are stable
measured value within the monitored time interval.

Measured Time interval Stability in the time interval

parameter
ORP 15 seconds Δ : better than 0.3 mV

Temperature 15 seconds Δ : better than 0.5 °C

The minimum duration until a measured value is assessed as stable is the

monitored time interval. The actual duration is mostly longer.

36 ba77054e03 03/2018
pH/Cond 3320 ORP voltage

Freezes the mea- With the HOLD function, you can freeze the current measured value. The dis-
sured value (HOLD played measured value stops changing until you switch the HOLD function off.
function)
1. Freeze the measured value with <AR>.
The [HOLD] status indicator is displayed.
2. Release the frozen measured value again with <AR> or <M>.
The HOLD function is switched off.
The [HOLD] status display disappears.

6.1.2 Measuring the temperature

For reproducible ORP measurements, it is essential to measure the tempera-

ture of the test sample.
You have the following options to measure the temperature:
 Automatic measurement of the temperature by the temperature sensor
(NTC30 or Pt1000) integrated in electrode.
 Manual determination and input of the temperature.

The measuring instrument recognizes whether a suitable sensor is connected

and automatically switches on the temperature measurement.
The display of the temperature indicates the active temperature measuring
mode:

Temperature Resolution of the

sensor temp. display Temp. measurement

yes 0.1 °C Automatic with temperature sensor

- 1 °C Manual

If you wish to measure without temperature sensor, proceed as follows:

1. Measure the current temperature of the test sample.

2. Set the temperature value with <>< >.
or
In the <ENTER>/U/Man. temperature menu, set the temperature value
with <>< >.

6.2 ORP calibration

ORP electrodes are not calibrated. You can, however, check ORP
electrodes by measuring the ORP of a test solution and comparing
the value with the nominal value.

ba77054e03 03/2018 37
Ion concentration pH/Cond 3320

7 Ion concentration
7.1 Measuring

7.1.1 Measuring the ion concentration

NOTE
When connecting an grounded PC/printer, measurements cannot be
performed in grounded media as the values would be incorrect.
The USB interface is not galvanically isolated.

Incorrect calibration of ion sensitive electrodes will result in incor-

rect measured values. Calibrate regularly before measuring.

For precise ISE measurements the temperature difference

between measurement and calibration should not be greater that
2 K. Therefore, adjust the temperature of the standard and
measuring solutions accordingly. If the temperature difference is
greater the [TempErr] warning appears in the measured value
display.

1. Connect the ISE electrode to the meter.

The pH/U/ISE measuring window is displayed.
2. If necessary, select the ISE display (unit, mg/l) with <M>.
3. When measuring without temperature sensor:
– Temper the test sample, or measure the current temperature.
4. Calibrate or check the meter with the electrode.

While no valid calibration is available, e.g. in the delivery condition,

"Error" appears in the measured value display.

5. Immerse the electrode in the test sample.

ISE
0.157 mg/l
25.0 °C
Ag

15.02.2014
Menu 12:12

Stability control The stability control function (AutoRead) continually checks the stability of the
(AutoRead ) measurement signal. The stability has a considerable impact on the reproduc-
ibility of measured values (see section 9.2.3 AUTOMATIC STABILITY CONTROL,

38 ba77054e03 03/2018
pH/Cond 3320 Ion concentration

page 62).
Criteria The AutoRead criteria affect the reproducibility of the measured values. The
following criteria can be adjusted:
 high: highest reproducibility
 medium: medium reproducibility
 low: lowest reproducibility

Increasing reproducibility also causes the response time to

increase until a measured value is evaluated as stable.

Freezes the mea- With the HOLD function, you can freeze the current measured value. The dis-
sured value (HOLD played measured value stops changing until you switch the HOLD function off.
function)
1. Freeze the measured value with <AR>.
The [HOLD] status indicator is displayed.
2. Release the frozen measured value again with <AR>.
The HOLD function is switched off.
The [HOLD] status display disappears.

7.1.2 Measuring the temperature

For reproducible ion-selective measurements, it is essential to measure the

temperature of the test sample.
You have the following options to measure the temperature:
 Measurement by an external temperature sensor.
 Manual determination and input of the temperature.

The measuring instrument recognizes whether a suitable sensor is connected

and automatically switches on the temperature measurement.
The display of the temperature indicates the active temperature measuring
mode:

Tempera- Resolution of the

ture sensor temp. display Temp. measurement

yes 0.1 °C Automatic with temperature sensor

- 1 °C Manual

If you wish to measure (or calibrate) without temperature sensor, proceed as

follows:

1. Measure the current temperature of the test sample.

ba77054e03 03/2018 39
Ion concentration pH/Cond 3320

2. When measuring without temperature sensor:

– Temper the test sample, or measure the current temperature.

7.2 Calibration

7.2.1 Why calibrate?

Ion-selective electrodes age and are temperature-dependent. This changes

the slope. As a result, an inexact measured value is displayed. Calibration
determines the calibration line of the electrode and stores this value in the
meter.
Thus, you should calibrate before each measurement (if possible), and at
regular intervals.

7.2.2 When to calibrate?

 Before any measurement if possible

 After connecting another ISE electrode
 When the sensor symbol flashes, e.g. after a voltage interruption (empty
batteries)

7.2.3 Calibration (ISE Cal)

ISE Cal is the conventional two-point to seven-point calibration procedure

that uses 2 to 7 freely selectable standard solutions. The concentration
expected in the measurement determines the concentration of the calibration
standards.

1. Connect the ISE electrode to the meter.

The pH/U/ISE measuring window is displayed.
2. Keep the standard solutions ready.
3. When measuring without temperature sensor:
– Temper the test sample, or measure the current temperature.
4. In the measured value display, select the ISE measuring window with
< > < > and <M>.
5. If necessary, change the unit of the measurement result and calibration
standards in the ISE setup/Unit menu.
6. Start the calibration with <CAL>.
The calibration display appears.

40 ba77054e03 03/2018
pH/Cond 3320 Ion concentration

ISE Standard 1
0.0 mV

24.8 °C
Ag 0.010 mg/l
15.02.2014
12:12

7. Thoroughly rinse the electrode with distilled water.

8. Immerse the electrode in standard solution 1.
9. When calibrating without temperature sensor:
 Measure the temperature of the standard solution using a thermom-
eter.
 Use <F2>/[ ⇅ ] to select the setting of the temperature.
 Use < > < > to set the temperature.
 Use <F2>/[ ⇅ ] to select the setting of the concentration.
10. Set the concentration of the standard solution with < > < > and press
<ENTER>.
The standard solution is measured.
The measured value is checked for stability (AutoRead).

ISE 0.01 mg/l

0.0 mV

24.8 °C

AR

15.02.2014
12:12

11. Wait for the end of the AutoRead measurement or accept the calibration
value with <ENTER>.
The calibration display for the next standard solution appears.

ba77054e03 03/2018 41
Ion concentration pH/Cond 3320

ISE Standard 2
0.0 mV

24.8 °C
Ag 0.020 mg/l
15.02.2014
12:12

Continuing with two-

12. Thoroughly rinse the electrode with distilled water.
point calibration
13. Immerse the electrode in standard solution 2.
14. When calibrating without temperature sensor:
 Measure the temperature of the standard solution using a thermom-
eter.
 Use <F2>/[ ⇅ ] to select the setting of the temperature.
 Use < > < > to set the temperature.
 Use <F2>/[ ⇅ ] to select the setting of the concentration.
15. Set the concentration of the standard solution with < > < > and
press <ENTER>.
The standard solution is measured.
The measured value is checked for stability (AutoRead).

ISE 0.02 mg/l

8.9 mV

24.8 °C

AR

15.02.2014
12:12

16. Wait for the end of the AutoRead measurement or accept the calibra-
tion value with <ENTER>.
The calibration display for the next standard solution appears.

ISE Standard 3
20.5 mV

24.8 °C
Ag 0.050 mg/l
15.02.2014
12:12

42 ba77054e03 03/2018
pH/Cond 3320 Ion concentration

17. Press <ENTER> to continue with three-point calibration.

or
Finish the calibration procedure as a two-point calibration with <M>.
The new calibration values are displayed.

Continuing with Repeat the steps 12 to 17 in the same way with the third and further standard
three- to seven-point solutions as necessary. The new calibration values are displayed after the last
calibration calibration step was completed.

Based on the calibration data, the calibration curve is determined

in sections, according to the Nernst equation modified by Nikolski.

7.2.4 Calibration standards

Use two to seven different standard solutions. The standard solutions have to
be selected in either increasing or decreasing order.

Select the unit of the standard solution and measurement result in

the ISE setup/Unit menu.

Standard solution (Std 1 - 7) Values

Unit [mg/l] 0.010 ... 500.000
Unit [mol/l] 0.100 ... 5.000 µmol/l
10.00 ... 5.000 mmol/l
Unit [mg/kg] 0.010 ... 500.000
Unit [ppm] 0.010 ... 500.000
Unit [%] 0.001 ... 50.000

The measurement precision is also dependent on the selected

standard solutions. Therefore, the selected standard solutions
should cover the value range expected of the following concentra-
tion measurement.
If the measured electrode potential is outside the calibrated range,
the [ISEErr] warning is displayed.

7.2.5 Calibration data

Displays the calibra- The calibration record of the last calibration is to be found under the menu item,
tion data <ENTER> / Calibration / Calibration record. To open it, press the <CAL _ > key
in the measured value display.
Subsequently, you can transmit the displayed calibration data to the interface,
e.g. to a PC, with the <F2>/[USB output] key.

ba77054e03 03/2018 43
Ion concentration pH/Cond 3320

Displaying the cali- The calibration records of the last calibrations are available in the menu,
bration data memory <ENTER> / Calibration / Calibration data storage.

Menu item Setting/func- Explanation

tion
Calibration / - Displays the calibration record.
Calibration data stor-
age / Display Further options:
 Scroll through the calibration
records with <>< >.
 Output the displayed calibra-
tion record to the interface with
<F2>/[USB output].
 Quit the display with <F1>/
[Back] or <ENTER>.
 Switch directly to the mea-
sured value display with <M>.
Calibration / - Outputs the calibration records to
Calibration data stor- the interface.
age / Output to USB

Calibration evalua- After calibrating, the meter automatically evaluates the calibration.
tion
Display Calibration Magnitude of the slope [mV]
record
+++ 50.0 ... 70.0 or 25.0 ... 35.0

Error Error < 50 or > 70

or
Error elimination (see section 13 WHAT TO < 25 or > 35
DO IF..., page 77)

Calibration record pH/Cond 3320

(example) Ser. no. 12345678

CALIBRATIONISE
18.01.2013 08:09:10

Standard 1 0.010 mg/l

Standard 2 0.020 mg/l
Voltage 1 38.5 mV
Voltage 2 58.0 mV
Temperature 1 24.0 øC
Temperature 2 24.0 øC
Ion type Ag
Slope 64.7 mV
Sensor +++
_____________________________________

44 ba77054e03 03/2018
pH/Cond 3320 Conductivity

8 Conductivity
8.1 Measuring

8.1.1 Measuring the conductivity

NOTE
When connecting an grounded PC/printer, measurements cannot be
performed in grounded media as the values would be incorrect.
The USB interface is not galvanically isolated.

1. Connect the conductivity measuring cell to the measuring instrument.

The conductivity measuring screen is displayed.
2. If necessary, select the measured parameter with <M>.
3. Check the Measuring cell settings and cell constant for the connected
conductivity measuring cell.
If necessary, correct the settings.

The selection of the measuring cell and the setting of the cell con-
stant is done in the measurement settings menu for conductivity
(see section 9.1.6 SETTINGS FOR CONDUCTIVITY MEASURING CELLS,
page 57). The cell constant to be set must either be taken from the
operating manual of the measuring cell or is printed on the measur-
ing cell.

4. Immerse the conductivity measuring cell in the test sample.

ϰ
1417 µS/cm
25.0 °C
[Tr25][nLF][ 0.470 1/cm]

15.02.2014
USB output
08:00

5. If necessary, select the measured parameter with <M>.

 Conductivity [µS/cm] / [mS/cm]
 Resistivity [Ω·cm] / [kΩ·cm] / [MΩ·cm]
 Salinity SaL [ ]
 Total dissolved solids TDS [mg/l] / [g/l]

ba77054e03 03/2018 45
Conductivity pH/Cond 3320

The factor to calculate the total dissolved solids is set to 1.00 in the
factory. You can adjust this factor to meet your requirements in the
range 0.40 ... 1.00. The factor is set in the Measurement menu for
the parameter, TDS.

Stability control The stability control function (AutoRead) continually checks the stability of the
(AutoRead ) measurement signal. The stability has a considerable impact on the reproduc-
ibility of measured values (see section 9.2.3 AUTOMATIC STABILITY CONTROL,
page 62).

Criteria for a stable The Stability control function checks whether the measured values are stable
measured value within the monitored time interval.

Measured Time Stability in the time interval

parameter interval
Conductivity ϰ 10 seconds Δ : better than 1.0% of measured value

Temperature 15 seconds Δ : better than 0.5 °C

The minimum duration until a measured value is assessed as stable is the mon-
itored time interval. The actual duration is mostly longer.

Freezes the mea- With the HOLD function, you can freeze the current measured value. The dis-
sured value (HOLD played measured value stops changing until you switch the HOLD function off.
function)
1. Freeze the measured value with <AR>.
The [HOLD] status indicator is displayed.
2. Release the frozen measured value again with <AR>.
The HOLD function is switched off.
The [HOLD] status display disappears.

8.1.2 Measuring the temperature

For reproducible conductivity measurements, it is essential to measure the

temperature of the test sample.
The temperature is automatically measured by the temperature sensor
(NTC30 or Pt1000) integrated in the sensor.

The conductivity sensor KLE 325 has an integrated temperature

sensor.

46 ba77054e03 03/2018
pH/Cond 3320 Conductivity

8.2 Calibration

8.2.1 Why calibrate?

Aging slightly changes the cell constant, e.g. due to coatings. As a result, an
inexact measured value is displayed. The original characteristics of the cell can
often be restored by cleaning the cell. Calibration determines the current value
of the cell constant and stores this value in the meter.
Thus, you should calibrate at regular intervals (we recommend: every 6
months).

8.2.2 When to calibrate?

 After connecting a sensor

 Routinely within the framework of the company quality assurance
 When the cleaning interval has expired

8.2.3 Determining the cell constant (calibration in control standard)

You can determine the actual cell constant of the conductivity measuring cell
by calibrating with the control standard in the following ranges:

 0.450 ... 0.500 cm-1

(e.g. TetraCon 325 with a nominal cell constant of 0.475 cm-1)
 0.800 ... 0.880 cm-1
(e.g. KLE 325 with a nominal cell constant of 0.840 cm-1)
The cell constant is determined in the control standard, 0.01 mol/l KCl. Cell
constants outside the ranges quoted above cannot be calibrated.

In the default condition, the calibrated cell constant of the meter is set to
0.475 cm-1 (conductivity sensor TetraCon 325).

For this calibration procedure, the Measuring cell setting must be set to cal in
the Measurement menu. Proceed as follows to determine the cell constant:

1. Connect the conductivity measuring cell to the measuring instrument.

2. In the measured value display, select the conductivity parameter with
<M>.
3. Start the calibration with <CAL>.
The cell constant that was calibrated last is displayed.

ba77054e03 03/2018 47
Conductivity pH/Cond 3320

ϰ
0.479 1 /cm
25.1 °C

15.02.2014
08:00

4. Immerse the conductivity measuring cell in the control standard solu-

tion, 0.01 mol/l KCI.
5. Start the measurement with <ENTER>.
The [AR] status indicator is displayed. A progress bar is displayed and
the display of the measured parameter flashes.
6. Wait for the end of the measurement with stability control or accept the
calibration value with <ENTER>.
The calibration record is displayed and output to the interface.
7. Using <F1>/[Continue] or <ENTER>, switch to the measured value
display.

8.2.4 Calibration data

The calibration record is automatically transmitted to the interface

after calibrating.

Displays the calibra- The calibration record of the last calibration is to be found under the menu item,
tion data <ENTER> / Calibration / Calibration record. To open it, press the <CAL _ > key
in the measured value display.
Subsequently, you can transmit the displayed calibration data to the interface,
e.g. to a PC, with the <F2>[USB output] key.
Displaying the cali- The calibration records of the last calibration procedures are available in the
bration data memory <ENTER>/Calibration / Calibration data storage and <ENTER>/Storage &
config / Data storage / Calibration data storage menu.

48 ba77054e03 03/2018
pH/Cond 3320 Conductivity

Menu item Setting/func- Explanation

tion
Calibration / - Displays the calibration record.
Calibration data stor-
age / Display Further options:
 Scroll through the calibration
or records with <>< >.
 Output the displayed calibra-
Data storage / tion record to the interface with
Calibration data stor- <F2>/[USB output].
age / Display
 Quit the display with <F1>/
[Back] or <ENTER>.
 Switch directly to the mea-
sured value display with <M>.
Calibration / - Outputs the calibration records to
Calibration data stor- the interface.
age / Output to USB

or

Data storage /
Calibration data stor-
age / Output to USB

Calibration evalua- After calibration, the meter automatically evaluates the current status of the cal-
tion ibration. The evaluation appears on the display and in the calibration record.

Display Calibration Cell constant [cm-1]

record
+++ within the ranges
0.450 ... 0.500 cm-1
or
0.800 ... 0.880 cm-1
Error Error outside the ranges
0.450 ... 0.500 cm-1
Error elimination (see section 13 or
WHAT TO DO IF..., page 77) 0.800 ... 0.880 cm-1

Calibration record
pH/Cond 3320
(example) Ser. no. 11292113

CALIBRATION Cond
15.02.2014 16:13:33

Cell constant 0.479 1/cm 25.0 °C

Sensor +++

ba77054e03 03/2018 49
Settings pH/Cond 3320

9 Settings
9.1 Measurement settings

9.1.1 Settings for pH measurements

The settings for pH measurements are made in the menu for calibration and
measurement settings of the pH/ORP measurement. To open the settings, dis-
play the required measured parameter in the measured value display and
press the <ENTER> key. After completing the settings, switch to the measured
value display with <M>.
In the following table, only those settings are listed that concern the pH mea-
surement.
Default settings are printed in bold.

Menu item Possible set- Explanation

ting
Calibration / - Displays the calibration record of
Calibration record the last calibration.
Calibration / - Displays the calibration record.
Calibration data
storage / Display Further options:
 Scroll through the calibration
records with <>< >.
 Output the displayed calibration
record to the interface with
<F2>/[USB output].
 Output all calibration records to
the interface with <F2 _ >/[USB
output].
 Quit the display with <F1>/
[Back] or <ENTER>.
 Switch directly to the measured
value display with <M>.
Calibration / - Outputs the calibration records to
Calibration data the interface.
storage / Output to
USB
Calibration / Buffer TEC Buffer sets to be used for pH cali-
NIST/DIN bration (see section 5.2 CALIBRA-
ConCal TION, page 25).
...
Calibration / One Yes Quick calibration with 1 buffer
point calibration No

50 ba77054e03 03/2018
pH/Cond 3320 Settings

Menu item Possible set- Explanation

ting
Calibration / Cali- 1 ... 7 ... 999 d Calibration interval for the pH elec-
bration interval trode (in days).
The meter reminds you to calibrate
regularly by the flashing sensor
symbol in the measuring screen.
Calibration / Unit for mV/pH Unit of the slope.
slope % The % display refers to the Nernst
slope of -59.2 mV/pH (100 x deter-
mined slope/Nernst slope).
Alternative tem- On Takes the temperature value from
perature Off the 2nd sensor.
Man. temperature -25 ... +25 ... Entry of the manually determined
+130 °C temperature. For measurements
without temperature sensor only.
Resolution pH 0.001 Resolution of the pH display
0.01
0.1
Reset - Resets all sensor settings to the
delivery condition (see section
9.3.1 RESETTING THE MEASUREMENT
SETTINGS, page 63).

9.1.2 Buffer sets for calibration

You can use the buffer sets quoted in the table for an automatic calibration. The
pH values are valid for the specified temperature values. The temperature
dependence of the pH values is taken into consideration during calibration.

No. Buffer set * pH values at

1 ConCal Any Any
2 NIST/DIN 1.679 25 °C
DIN buffers according to DIN 19266 4.006
and NIST Traceable Buffers 6.865
9.180
12.454
3 TEC 2.000 25 °C
WTW Technical buffers 4.010
7.000
10.011
4 Merck 1* 4.000 20°C
7.000
9.000

ba77054e03 03/2018 51
Settings pH/Cond 3320

No. Buffer set * pH values at

5 Merck 2 * 1.000 20°C
6.000
8.000
13.000
6 Merck 3 * 4.660 20°C
6.880
9.220
7 Merck 4 * 2.000 20°C
4.000
7.000
10.000
8 Merck 5 * 4.010 25 °C
7.000
10.000
9 DIN 19267 1.090 25 °C
4.650
6.790
9.230
10 Mettler Toledo USA * 1.679 25 °C
4.003
7.002
10.013
11 Mettler Toledo EU * 1.995 25 °C
4.005
7.002
9.208
12 Fisher * 2.007 25 °C
4.002
7.004
10.002
13 Fluka BS * 4.006 25 °C
6.984
8.957
14 Radiometer * 1.678 25 °C
4.005
7.000
9.180
15 Baker * 4.006 25 °C
6.991
10.008
16 Metrohm * 3.996 25 °C
7.003
8.999

52 ba77054e03 03/2018
pH/Cond 3320 Settings

No. Buffer set * pH values at

17 Beckman * 4.005 25 °C
7.005
10.013
18 Hamilton Duracal * 4.005 25 °C
7.002
10.013
19 Precisa * 3.996 25 °C
7.003
8.999
20 Reagecon TEC * 2.000 25 °C
4.010
7.000
10.000
21 Reagecon 20 * 2.000 20°C
4.000
7.000
10.000
13.000
22 Reagecon 25 * 2.000 25 °C
4.000
7.000
10.000
13.000
23 Chemsolute * 2.000 20°C
4.000
7.000
10.000
24 USABlueBook * 4.000 25 °C
7.000
10.000
25 YSI * 4.000 25 °C
7.000
10.000

* Brand names or trade names are trademarks of their respective owners protected
by law.

The buffers are selected in the menu, pH / <ENTER> / Calibration

/ Buffer (see 9.1.1 SETTINGS FOR PH MEASUREMENTS, PAGE 50).

9.1.3 Calibration interval

The calibration evaluation is displayed as a sensor symbol.

The sensor symbol flashes after the adjusted calibration interval has expired. It
is still possible to measure.

ba77054e03 03/2018 53
Settings pH/Cond 3320

To ensure the high measuring accuracy of the measuring system,

calibrate after the calibration interval has expired.

Setting the calibra- The calibration interval is set to 7 days in the factory.
tion interval You can change the interval (1 ... 999 days):

1. Open the menu for measurement settings with <ENTER>.

2. In the Calibration / Calibration interval menu, set the calibration interval
with <>< >.
3. Confirm the setting with <ENTER>.
4. Quit the menu with <M>.

9.1.4 Settings for ORP measurements

The settings for ORP measurements are made in the menu for calibration and
measurement settings of the pH/ORP measurement. To open the settings, dis-
play the required measured parameter in the measured value display and
press the <ENTER>key. After completing the settings, switch to the measured
value display with <M>.
In the following table, only those settings are listed that influence the ORP mea-
surement.
Default settings are printed in bold.

Menu item Possible Explanation

setting
Man. temperature -25 ... +25 ... Entry of the manually determined
+130 °C temperature. For measurements
without temperature sensor only.
Resolution mV 0.1 Resolution of the mV display
1
Reset - Resets all sensor settings to the
delivery condition (see section 9.3.1
RESETTING THE MEASUREMENT SET-
TINGS, page 63).

54 ba77054e03 03/2018
pH/Cond 3320 Settings

9.1.5 Settings for ISE measurements

The settings for ISE measurements are made in the menu for calibration and
measurement settings of the ISE measurement. To open the settings, display
the required measured parameter in the measured value display and press the
<ENTER> key. After completing the settings, switch to the measured value dis-
play with <M>.
In the following table, only those settings are listed that influence the ISE mea-
surement:

Menu item Possible setting Explanation

Calibration / - Displays the calibration
Calibration record record of the last calibra-
tion.
Calibration / - Outputs the calibration
Calibration data records to the interface.
storage / Output to
USB
Calibration / - Displays the calibration
Calibration data record.
storage /Display
Further options:
 Scroll through the cali-
bration records with
<>< >.
 Output the displayed
calibration record to the
interface with <F2>/
[USB output].
 Output all calibration
records to the interface
with <F2 _ >/[USB out-
put].
 Quit the display with
<F1>/[Back] or
<ENTER>.
 Switch directly to the
measured value display
with <M>.
Alternative tem- On Takes the temperature
perature Off value from the 2nd sensor.
Man. temperature -25 ... +25 ... +130 °C Entry of the manually
determined temperature.
For measurements without
temperature sensor only.
ISE setup/ low Selection of the AutoRead
AutoRead criterion medium criteria (see section 7.1.1
high MEASURING THE ION CON-
CENTRATION, page 38).

ba77054e03 03/2018 55
Settings pH/Cond 3320

Menu item Possible setting Explanation

ISE setup/ Ag, Br, Ca, Cd, Cl, Selection of the ion type to
Ion type CN, Cu, F, I, K, Na, be measured.
NO3, Pb, S, NH3,
NH4*, CO2, ION An ion that is not included
in the list can be measured
with the setting, ION.
* Measuring with the NH 500 electrode:
The NH4 setting is not suitable for the gas-sensi-
tive electrode NH 500.
Select the following settings:
Ion type "ION", Valency "-1".
ISE setup/ mg/l Selection, with which unit
Unit µmol/l the measurement result
mg/kg and calibration standards
ppm should be displayed.
%
ISE setup/ Valency Set the valence (Valency)
Ion type/ION Molar mass and molar weight (Molar
mass) for the ion.
ISE setup/ 0.001 ... 9.999 g/ml Adjustable density of the
Density or kg/l test sample (only with Unit:
mg/kg, ppm, %)

56 ba77054e03 03/2018
pH/Cond 3320 Settings

9.1.6 Settings for conductivity measuring cells

The settings are made in the Measurement menu for the measured parameter,
conductivity. To open the settings, display the required measured parameter in
the measured value display and press the <ENTER> key. After completing the
settings, switch to the measured value display with <M>.
Default settings are printed in bold.

Menu item Possible Explanation

setting
Calibration / - Displays the calibration record of the
Calibration record last calibration.
Calibration / - Displays the calibration record.
Calibration data
storage / Display Further options:
 Scroll through the calibration
records with <>< >.
 Output the displayed calibration
record to the interface with <F2>/
[USB output].
 Output all calibration records to the
interface with <F2 _ >/[USB out-
put].
 Quit the display with <F1>/[Back]
or <ENTER>.
 Switch directly to the measured
value display with <M>.
Calibration / - Outputs the calibration records to the
Calibration data interface.
storage / Output to
USB
Calibration / 1 ... 150 ... Calibration interval for the measuring
Calibration interval 999 d cell (in days).
The meter reminds you to calibrate
regularly by the flashing sensor sym-
bol in the measuring screen.

ba77054e03 03/2018 57
Settings pH/Cond 3320

Menu item Possible Explanation

setting
Measurement / Measuring cell used
Measuring cell /
Type Cal Measuring cells whose cell constant
is determined by calibration in the
KCL control standard solution.
Calibration ranges:
0.450 ... 0.500 cm-1 and
0.800 ... 0.880 cm-1
The currently valid cell constant is
displayed in the status line.

LR 325/01 Measuring cell LR 325/01,

nominal cell constant
0.100 cm-1.
The cell constant can be adjusted in
the range 0.090 ... 0.110 cm-1.
LR 325/001 Measuring cell LR 325/001,
nominal cell constant
0.010 cm-1.
The cell constant is permanently set.
man Any measuring cells with freely
adjustable cell constants.
Measurement / 0,250 ... Display and setting option of the cell
Measuring cell / 0,475 constant of any measuring cells
Cell const. man 25,000 cm-1 (man).
Measurement / 0.090 ... Display and setting options for the cell
Measuring cell / 0.100 ... constant of the measuring cell
Cell const. LR325/ 0.110 cm-1 LR 325/01.
01
Measurement / nLF Procedure for temperature compen-
Temp. comp. (TC) Lin sation (see section 9.1.8 TEMPERA-
/ Method Off TURE COMPENSATION, page 59).
This setting is only available for the
measured parameters, ϰ and ρ.
Measurement / 0.000 ... Coefficient of the linear temperature
Temp. comp. (TC) 2.000 ... compensation.
/ Linear coeff. 10.000 %/K
This setting is only available when the
linear temperature compensation is
set.

58 ba77054e03 03/2018
pH/Cond 3320 Settings

Menu item Possible Explanation

setting
Measurement / 20 °C Reference temperature
Temp. comp. (TC) 25 °C
/Reference temp. This setting is only available for the
measured parameters, ϰ and ρ.
Measurement / 0.40 ... 1.00 Multiplier for TDS value
TDS factor
Reset - Resets all sensor settings to the deliv-
ery condition (see section 9.3.1
RESETTING THE MEASUREMENT SET-
TINGS, page 63).

9.1.7 Calibration interval

The calibration evaluation is displayed as a sensor symbol.

The sensor symbol flashes after the adjusted calibration interval has expired. It
is still possible to measure.

To ensure the high measuring accuracy of the measuring system,

calibrate after the calibration interval has expired.

Setting the calibra- The calibration interval is set to 150 days in the factory.
tion interval You can change the interval (1 ... 999 days):

1. Open the menu for measurement settings with <ENTER>.

2. In the Calibration / Calibration interval menu, set the calibration interval
with <>< >.
3. Confirm the setting with <ENTER>.
4. Quit the menu with <M>.

9.1.8 Temperature compensation

The calculation of the temperature compensation is based on the preset refer-

ence temperature, 20 °C or 25 °C. It appears on the display as Tr20 or Tr25.
You can select one of the following temperature compensation methods:
 Nonlinear temperature compensation (nLF) according to EN 27 888
 Linear temperature compensation (lin) with adjustable coefficient in the
range 0.000 ... 10.000 %/K
 No temperature compensation (off)

ba77054e03 03/2018 59
Settings pH/Cond 3320

The reference temperature and temperature compensation are set

in the Measurement menu for the parameter, conductivity (see sec-
tion 9.1.6 SETTINGS FOR CONDUCTIVITY MEASURING CELLS, page 57).

Application tips Set the temperature compensation suitable for your test sample:

Test sample Temperature compensation Display

Natural water nLF nLF

(ground water, surface according to EN 27 888
water, drinking water)
Ultrapure water nLF nLF
according to EN 27 888
Other aqueous solutions Lin Lin
Set linear temperature coeffi-
cient 0.000 ... 10.000 %/K
Salinity (seawater) Automatic nLF according to Sal, nLF
IOT (International Oceano-
graphic Tables)

9.1.9 Setting the TDS factor

The factor to calculate the total dissolved solids is set to 1.00 in the delivery
condition.
You can adjust this factor to meet your requirements in the range 0.40 ... 1.00.
The factor is set in the menu for the parameter TDS (Measurement / TDS fac-
tor).

60 ba77054e03 03/2018
pH/Cond 3320 Settings

9.2 Sensor-independent settings

9.2.1 System

To open the Storage & config menu, press the <ENTER _ > key in the mea-
sured value display. After completing the settings, switch to the measured
value display with <M>.
Default settings are printed in bold.

Menu item Possible Explanation

setting
System / General / Deutsch Selects the menu language
Language English
(more)
System / General / On Switches on/off the beep on
Beep Off keystroke
System / General / Illu- Auto Switches the display illumina-
mination On tion on/off
Off
System / General / 0 ... 50 ... Changes the display contrast
Contrast 100 %
System / General / 10 min ... 1h Adjusts the shut-off time
Switchoff time ... 24 h
System / General / °C Temperature unit,
Temperature unit °F degrees Celsius or degrees
Fahrenheit.
All temperature values are dis-
played with the selected unit.
System / General / On Switches on or off the auto-
Stability control Off matic stability control during
measurement
System / Interface / 1200, 2400, Baud rate of the data interface
Baud rate 4800, 9600,
19200
System / Interface / ASCII Output format for data trans-
Output format CSV mission (see section 11 TRANS-
MITTING DATA (USB INTERFACE),
page 72)
System / Interface / Dot (xx.x) Decimal separator
Decimal separator Comma (xx,x)
System / Interface / Output of a header for Output
Output header format: CSV

ba77054e03 03/2018 61
Settings pH/Cond 3320

Menu item Possible Explanation

setting
System / Clock Date format Time and date settings (see
Datum section 4.4.6 EXAMPLE 2 ON
Time NAVIGATION: SETTING THE DATE
AND TIME, page 20)

System / Service infor- Hardware version and software

mation version of the meter are dis-
played.
System / Reset - Resets the system settings to
the delivery condition (see sec-
tion 9.3.2 RESETTING THE SYS-
TEM SETTINGS, page 64).

9.2.2 Data storage

This menu contains all functions to display, edit and erase stored measured
values and calibration records (see section 10 DATA MEMORY, page 66).

9.2.3 Automatic Stability control

The automatic Stability control (AutoRead) function continuously checks the

stability of the measurement signal. The stability has a considerable impact on
the reproducibility of measured values.

You can activate or switch off the automatic Stability control function (see sec-
tion 9.2.1 SYSTEM, page 61).

The measured parameter flashes on the display

 as soon as the measured value is outside the stability range
 when you switch over between the measured parameters with <M>.
 when the automatic Stability control is switched off.

Manually starting Irrespective of the setting for automatic Stability control (see section 9.2.1 SYS-
the stability control TEM, page 61) in the System menu, you can start the Stability control function
manually at any time.

1. Freeze the measured value with <AR>.

The [HOLD] status indicator is displayed.

If the HOLD function is active, you can, e.g. start a manual mea-
surement with stability control.

62 ba77054e03 03/2018
pH/Cond 3320 Settings

2. Using <ENTER>, activate the Stability control function manually.

The [AR] status indicator appears while the measured value is assessed
as not stable. A progress bar is displayed and the display of the measured
parameter flashes.
The [HOLD][AR] status indicator appears as soon as a stable measured
value is recognized. The progress bar disappears and the display of the
measured parameter stops flashing.
The current measurement data is output to the interface. Measurement
data meeting the stability control criterion is marked by AR.

You can prematurely terminate the Stability control function manu-

ally with <ENTER> at any time. If the Stability control function is
prematurely terminated, the current measurement data are output
to the interface without the AutoRead info.

3. Using <ENTER>, start a further measurement with Stability control.

or
Release the frozen measured value again with <AR>.
The display switches to the measured value display.
The [AR][HOLD] status display disappears.

9.3 Reset
You can reset (initialize) all sensor settings and sensor-independent settings
separately from each other.

9.3.1 Resetting the measurement settings

The calibration data are reset to the default settings together with
the measuring parameters. Recalibrate after performing a reset.

The following settings for pH measurements are reset to the default settings
with the Reset function:

pH Setting Default settings

Buffer TEC
Calibration interval 7d
Unit for slope mV/pH
Measured parameter pH
Resolution pH 0.001
Resolution mV 0.1
Asymmetry 0 mV

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Settings pH/Cond 3320

Setting Default settings

Slope -59.2 mV
Man. temperature 25 °C
One point calibration No

The sensor settings are reset under the Reset menu item in the menu for cali-
bration and measurement settings. To open it in the measured value display,
press the <ENTER> (or <F1>/[Menu]) key.

Cond The following settings for conductivity measurements are reset to the default
settings with the Reset function:

Setting Default settings

Kal.-Intervall 150 d
Measured parameter ϰ
Cell constant (C) 0.475 cm-1 or 0.840 cm-1
(calibrated) (nominal cell constant of the conduc-
tivity measuring cell last calibrated)
Cell constant (C) 0.470 1/cm
(set)
Temperature compensation nLF
Reference temperature 25 °C
Temperature coefficient (TC) of the 2.000 %/K
linear temperature compensation
TDS multiplier 1.00

The sensor settings are reset under the Reset menu item in the menu for cali-
bration and measurement settings. To open it in the measured value display,
press the <ENTER> (or <F1>/[Menu]) key.

9.3.2 Resetting the system settings

The following system settings can be reset to the default status:

Setting Default settings

Language English
Beep On
Baud rate 4800 Baud
Output format ASCII
Decimal separator Dot (xx.x)

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pH/Cond 3320 Settings

Setting Default settings

Contrast 50 %
Illumination Auto
Switchoff time 1h
Stability control On
Temperature unit °C

The system settings are reset in the menu, Storage & config / System / Reset.
To open the Storage & config menu in the measured value display, press the
<ENTER _> (or <F1 _ >/[Menu]) key.

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Data memory pH/Cond 3320

10 Data memory
You can transmit measured values (datasets) to the data memory:
 Manual data memory (see section 10.1 MANUAL STORAGE, page 66)
 Automatic storage at intervals (see section 10.2 AUTOMATIC DATA STORAGE
AT INTERVALS, page 67)

With each data storage process, the current datasets of the sen-
sors indicated on the display are transmitted to the interface at the
same time.

10.1 Manual storage

You can transmit a measurement dataset to the data memory as follows.
With each data storage process, the current datasets of the sensors indicated
on the display are transmitted to the interface at the same time.

1. Press the <STO> key shortly.

The menu for manual data storage appears.

Manual data storage 4 von 500

15.02.2014 11:24:16
pH 7.000 24.8 °C AR +++

ID number: 1
Continue

15.02.2014
Back
14:15

2. If necessary, change and confirm the ID number (1 ... 10000) with

<>< > and <ENTER>.
The dataset is stored. The meter switches to the measured value dis-
play.

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pH/Cond 3320 Data memory

If the memory is full The following window appears if all 500 storage locations are occupied:

Warning

Data storage full. Erase?

Yes
No

Back 15.02.2014
14:15

You have the following options:

 To erase the entire memory, confirm Yes.
 To cancel the storing process and switch to the measured value display,
confirm No. Then you can e.g. store the recorded data to a PC (see section
10.3.1 EDITING THE MEASUREMENT DATA MEMORY, page 69) and subsequently
erase the data memory (see section 10.3.2 ERASING THE MEASUREMENT DATA
MEMORY, page 71).

10.2 Automatic data storage at intervals

The storing interval (Interval) determines the time interval between automatic
data storing processes. With each data storage process, the current datasets
of the sensors indicated on the display are transmitted to the interface at the
same time.

Configuring the
automatic memory
1. Press the <STO _
> key.
The menu for automatic data storing appears.
function

Automatic data storage

ID number 1
1
Interval 30 s
Duration 180 min
Continue
0d03h00min 2

0 1d17h33m
in 15.02.2014
Back 14:15
3

1 Specified entire storing duration

2 Max. available storing duration
3 Graphical display of the memory usage

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Data memory pH/Cond 3320

Settings You can configure the automatic data storing function with the following
settings:

Menu item Possible set- Explanation

ting
ID number 1 ... 10000 ID number for the dataset series.
Interval 1 s, 5 s, 10 s, Storing interval.
30 s, 1 min,
5 min, The lower limit of the storing inter-
10 min, val can be restricted by the num-
15 min, ber of free memory locations.
30 min, The upper limit is restricted by the
60 min storing duration.
Duration 1 min ... x min Storing duration.
Specifies after which time the
automatic data storing should be
terminated.

The lower limit of the storing dura-

tion is restricted by the storing
interval.
The upper limit is restricted by the
number of free memory locations.

Starting the auto- To start the automatic storing function, select Continue with <>< > and con-
matic storing func- firm with <ENTER>. The meter switches to the measured value display.
tion

pH 0 14
1
6.949
25.0 °C
0d03h00min

2
15.02.2014
Eco mode 14:15

1 Remaining storing duration

2 Graphical display of the storing duration

The active automatic storage function can be recognized by the progress bar
in the function display. The progress bar indicates the remaining storage dura-
tion.

If the automatic storage function is activated, only the following

keys are active: Softkeys, <M>, <STO _ > and <On/Off>. The
other keys and the automatic shut-off function are deactivated.

Energy saving mode If the automatic storing function is active, the meter provides an energy saving
([Eco mode]) mode ([Eco mode]) to avoid unnecessary energy consumption. The energy

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pH/Cond 3320 Data memory

saving mode switches off functions of the meter that are not required for the
automatic storage of measurement data (such as the display). By pressing any
key the energy saving mode is switched off again.

Terminating the Proceed as follows to switch off the automatic data storing function before the
automatic memory adjusted storing duration has expired:
function prema-
turely
1. Press the <STO _ > key.
The following window appears.

Warning

Stop automatic storage?

Yes
No

Back 15.02.2014
14:15

2. Using <>< >, select Yes and confirm with <ENTER>.

The meter switches to the measured value display.
The automatic data storing function is terminated.

10.3 Measurement data memory

10.3.1 Editing the measurement data memory

The contents of the manual or automatic measurement data memory can be

shown on the display and output to the interface.
Each of the measurement data memories has a function to erase the entire
contents.
Editing the data The memory is edited in the menu, Storage & config/ Data storage. To open the
memory Storage & config menu, press the <ENTER _ > key in the measured value
display.
Open the manual or automatic storage directly with the <RCL> or <RCL _>
key.

The settings are explained here using the manual data memory as
an example. The same settings and functions are available for the
automatic data memory.

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Data memory pH/Cond 3320

Settings Menu item Setting/ Explanation

function
Data storage / - Displays all measurement datasets
Manual data storage page by page.
/ Display
Further options:
 Scroll through the datasets with
<>< >.
 Output the displayed dataset to
the interface with <F2>/[USB
output].
 Quit the display with <F1>/
[Back].
Data storage / - Erases the entire manual mea-
Manual data storage surement data memory.
/ Erase All calibration data remain stored
when this action is performed.
Data storage / - Outputs all stored measurement
Manual data storage data to the interface.
/ Output to USB

Display presentation Manual data storage 3 of 64

of a dataset
15.02.2014 11:24:16 ID number: 2

pH 7.000 24.8 °C AR +++

15.02.2014
Back
14:15

Representation of a 15.02.2014 09:56:20

dataset pH/Cond 3320
Ser. no. 08502113
(USB output)
ID number 2

pH1 6.012 24.8 °C, AR, S: +++

________________________________________

15.02.2014 10:56:20
pH/Cond 3320
Ser. no. 08502113

ID number 2

pH1 6.012 24.8 °C, AR, S: +++

________________________________________
etc...

Quitting the display To quit the display of stored measurement datasets, you have the following

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pH/Cond 3320 Data memory

options:
 Switch directly to the measured value display with <M>.
 Quit the display and move to the next higher menu level with <F1>/[Back].

10.3.2 Erasing the measurement data memory

Erasing the measurement data memory (see section 10.3.1 EDITING THE
MEASUREMENT DATA MEMORY, page 69).

10.3.3 Measurement dataset

A complete dataset consists of:

 ID number
 Date/time
 Measured values of the connected sensors
 Measured temperature value of the connected sensors or manually set tem-
perature
 AutoRead info: The AR indicator appears with the measured value if the
AutoRead criterion was met while storing (stable measured value). Other-
wise, there is no AR indicator.
 Calibration evaluation: +++, ++, +, -, or no evaluation

10.3.4 Memory locations

The pH/Cond 3320 meter has two measurement data memories. The
measured values recorded either manually or automatic are stored separately
in individual measurement data memories.

Data memory Maximum number of datasets

Manual data storage 500
Automatic data storage 5000

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Transmitting data (USB interface) pH/Cond 3320

11 Transmitting data (USB interface)

11.1 Options for data transmission
Via the USB interface you can transmit data to a PC. The following table shows
which data are transmitted to the interface in which way:

Data Control Operation / description

Current datas- Manual  With <F2>/[USB output].
ets of the sen-  Simultaneously with every manual
sors indicated data storage process (see section
on the display 10.1 MANUAL STORAGE, page 66).
Automatic, at  With <F2 _>/[USB output].
intervals Then you can set the transmission
interval.
 Simultaneously with every auto-
matic data storing process (see
section 10.2 AUTOMATIC DATA
STORAGE AT INTERVALS, page 67).

Stored mea- Manual  Displayed dataset with <F2>[USB

sured values output] after calling up from the
memory.
 All datasets with the Output to USB
function.
(see section 10.3.1 EDITING THE
MEASUREMENT DATA MEMORY, page
69).
Calibration Manual  Calibration record with <F2>/[USB
records output]
(see section 5.2.6 CALIBRATION
DATA, page 32).

Automatic  At the end of a calibration proce-

dure.

The following rule applies: With the exception of the menus, shortly
pressing the <F2>[USB output] key generally outputs the display
contents to the interface (displayed measured values, measure-
ment datasets, calibration records).

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pH/Cond 3320 Transmitting data (USB interface)

11.2 Connecting a PC
Connect the pH/Cond 3320 to the PC via the USB interface.

NOTE
When connecting an grounded PC/printer, measurements cannot be
performed in grounded media as the values would be incorrect.
The USB interface is not galvanically isolated.

Installation of the System requirements of the PC for installation of the USB driver:
USB driver on the
PC
1. Insert the supplied installation CD in the CD drive of your PC.
2. Install the driver from the CD.
Follow the Windows installation instructions as necessary.
3. Connect the pH/Cond 3320 to the PC via the USB interface.
The meter is listed as a virtual COM interface among the connections in
the Windows instrument manager.

11.3 MultiLab Importer

With the aid of the MultiLab Importer software, you can record and evaluate
measurement data with a PC.

More detailed information can be found in the MultiLab Importer

operating manual.

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Maintenance, cleaning, disposal pH/Cond 3320

12 Maintenance, cleaning, disposal

12.1 Maintenance

12.1.1 General maintenance activities

The only maintenance activity required is replacing the batteries.

See the relevant operating manuals of the electrodes for instruc-

tions on maintenance.

12.1.2 Replacing the batteries

1 Screws
2 Battery compartment

1. Unscrew the two screws (1) on the underside of the meter.

2. Open the battery compartment (2) on the underside of the meter.
3. Remove the batteries from the battery compartment.

CAUTION
Make sure that the poles of the batteries are positioned cor-
rectly.
The ± signs on the batteries must correspond to the ± signs in
the battery compartment.

You can operate the meter either with normal batteries or with
rechargeable batteries (Ni-MH). In order to charge the batteries, an
external charging device is required.

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pH/Cond 3320 Maintenance, cleaning, disposal

4. Place four batteries (type Mignon AA) in the battery compartment.

5. Close the battery compartment.
6. Set the date and time
(see section 4.4.6 EXAMPLE 2 ON NAVIGATION: SETTING THE DATE
AND TIME, page 20).

When the batteries are nearly discharged, the status indi-

cator is displayed.

Dispose of used batteries according to the local regulations of your

country.
End users within the European Union are obligated to return used
batteries (even ecologically compatible ones) to a collection point
set up for recycling purposes.
Batteries are marked with the crossed-out waste container symbol.
Therefore, they may not be disposed with the domestic waste.

12.2 Cleaning
Occasionally wipe the outside of the measuring instrument with a damp, lint-
free cloth. Disinfect the housing with isopropanol as required.

CAUTION
The housing is made of synthetic material (ABS). Thus, avoid
contact with acetone or similar detergents that contain sol-
vents. Remove any splashes immediately.

12.3 Packing
This meter is sent out in a protective transport packing.
We recommend: Keep the packing material. The original packing protects the
meter against damage during transport.

12.4 Disposal
At the end of its operational lifetime, the meter must be returned to the
disposal or return system statutory in your country. If you have any questions,
please contact your supplier.

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Maintenance, cleaning, disposal pH/Cond 3320

12.4.1 ISE

Electrodes Order no.

Ag/S 800 with BNC-plug, combined electrode for silver and 662-7058
sulfide
Br 800 with BNC-plug, combined electrode for bromide 662-7130
Ca 800 with BNC-plug, combined electrode for calcium 662-7368
Cd 800 with BNC-plug, combined electrode for cadmium 662-7370
Cl 800 with BNC-plug, combined electrode for chloride 662-7372
CN 800 with BNC-plug, combined electrode for cyanide 662-7374
Cu 800 with BNC-plug, combined electrode for copper 662-7376
F 800 with BNC-plug, combined electrode for fluoride 662-7378
I 800 with BNC-plug, combined electrode for iodide 662-7380
K 800 with BNC-plug, combined electrode for potassium 662-7382
NO 800 with BNC-plug, combined electrode for nitrate 662-7385
EXCHANGE HEAD K 800/AT 662-7384
EXCHANGE HEAD NO 800/AT 662-7387

Accessories Order no.

Universal bridge electrolyte ELY/BR/503 for R503 reference 662-0492
electrode 250 ml
Internal electrolyt ELY/IN/502 for R 502 reference electrode 662-0354
250 ml
Bridge electrolyt ELY/BR/502 for R 502 reference electrode 662-0355
250 ml
Bridge electrolyte ELY/BR/503/N for R503 reference elect- 662-0493
rode for nitrate 250 ml
Bridge electrolyte ELY/BR/503/K for R503 reference electrode 662-0494
for potassium 250 ml

12.4.2

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pH/Cond 3320 What to do if...

13 What to do if...
13.1 pH/ORP

More information and instructions on cleaning and exchange of

sensors are given in the documentation of your sensor.

Error message The measured value is outside the measuring range.

OFL, UFL
Cause Remedy
Electrode:
– Air bubble in front of the junction – Remove air bubble
– Air in the junction – Extract air or moisten junction
– Cable broken – Replace the electrode
– Gel electrolyte dried out – Replace the electrode
– The measured value is outside – Use a suitable electrode
the measuring range of the meter

Error message, Cause Remedy

Error
Electrode:
– The values determined for zero – Recalibrate
point and slope of the electrode
are outside the allowed limits.
– Junction contaminated – Clean the junction
– Electrode broken – Replace the electrode
Buffer solutions:
– Incorrect buffer solutions – Change calibration procedure
– Buffer solutions too old – Use only once.
Note the shelf life
– Buffer solutions depleted – Change solutions

ba77054e03 03/2018 77
What to do if... pH/Cond 3320

No stable measured Cause Remedy

value
Electrode:
– Junction contaminated – Clean the junction
– Membrane contaminated – Clean membrane

Test sample:
– pH value not stable – Measure with air excluded if
necessary
– Temperature not stable – Temper if necessary

Electrode + test sample:

– Conductivity too low – Use a suitable electrode
– Temperature too high – Use a suitable electrode
– Organic liquids – Use a suitable electrode

Obviously incorrect Cause Remedy

measured values
Electrode:
– Electrode unsuitable – Use a suitable electrode
– Temperature difference between – Adjust temperature of buffer or
buffer and test sample too great sample solutions
– Measurement procedure not suit- – Follow special procedure
able

78 ba77054e03 03/2018
pH/Cond 3320 What to do if...

13.2 ISE

Error message OFL Cause Remedy

– Measuring range exceeded – Dilute test sample

Obviously incorrect Cause Remedy

measured values
– Electrode not connected – Connect the electrode
– Cable broken – Replace the electrode

Error message Error Cause Remedy

(invalid
calibration) ISE electrode:
– Moisture in the plug – Dry plug
– Electrode obsolete – Replace the electrode
– Electrode unsuitable for the range to – Use a suitable electrode
be measured
– Electrode not suitable for the – Use a suitable electrode or
selected ion select a suitable ion
– The gas-sensitive electrode NH 500 – Select the following settings:
was calibrated with the Ion type Ion type = ION,
NH4 setting Valency = -1
– Socket damp – Dry socket
Calibration procedure:
– Calibration standards do not have – Adjust the temperature of the
the correct temperature (max. ± 2 °C calibration standards
temperature difference)

Warning [TpErr] Cause Remedy

– Temperature difference between – Adjust the temperature of the
measurement and calibration test sample
greater than 2 K.

Warning [ISEErr] Cause Remedy

– Electrode voltage outside calibrated – Recalibrate
range

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What to do if... pH/Cond 3320

13.3 Conductivity

More information and instructions on cleaning and exchange of

sensors are given in the documentation of your sensor.

Error message The measured value is outside the measuring range.

OFL, UFL
Cause Remedy
– The measured value is outside – Use a suitable measuring cell
the measuring range of the meter

Error message, Cause Remedy

Error
– Measuring cell contaminated – Clean cell and replace it if nec-
essary
– Calibration solution not suitable – Check the calibration solutions

80 ba77054e03 03/2018
pH/Cond 3320 What to do if...

13.4 General information

Sensor symbol Cause Remedy

flashes
– Calibration interval expired – Recalibrate the measuring
system

Display Cause Remedy

– Batteries almost empty – Replace the batteries (see
section 12.1 MAINTENANCE,
page 74)

Meter does not react Cause Remedy

to keystroke
– Operating condition undefined or – Processor reset:
EMC load unallowed Press the <ENTER> and <On/
Off> key simultaneously

You want to know Cause Remedy

which software
version is in the – E.g., a question by the service – Switch on the meter.
meter department Open the menu, <ENTER _ >
/ Storage & config / System /
Service information. The
instrument data are displayed.

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Technical data pH/Cond 3320

14 Technical data
14.1 Measuring ranges, resolution, accuracy

14.1.1 pH/ORP

Measuring ranges, Variable Measuring range Resolution

resolution pH -2.0 ... +20.0 0.1
-2.00 ... +20.00 0.01
- 2.000 ... + 19.999 0.001
U [mV] -2500 ... +2500 1
-1200.0 ... +1200. 0.1
T [°C] -5.0 ... +105.0 0.1
T [°F] 23.0 ... +221.0 0.1

Manual Variable Range Increment

temperature input Tmanual [°C] -25 ... +130 1
Tmanual [°F] -13 ... +266 1

Accuracy (± 1 digit) Variable Accuracy Temperature of the test

sample
pH / range *
-2.0 ... +20.0 ± 0.1 +15 °C ... +35 °C
-2.00 ... +20.00 ± 0.01 +15 °C ... +35 °C
- 2.000 ... + 19.999 ± 0.005 +15 °C ... +35 °C
U [mV] / range
-2500 ... +2500 ±1 +15 °C ... +35 °C
-1200.0 ... +1200. ± 0.3 +15 °C ... +35 °C
T [°C] / temperature sensor
NTC 30 ± 0.1
PT 1000 ± 0.1
* when measuring in a range of ± 2 pH around a calibration point

The accuracy values specified here apply exclusively to the meter.

The accuracy of the electrodes and buffer solutions has to be taken
into account additionally.

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pH/Cond 3320 Technical data

14.1.2 ISE

Measuring ranges, Variable Measuring range Resolution

resolution ISE [mg/l] 0.000 ... 9.999 0,001
10.00 ... 99.99 0,01
100.0 ... 999.9 0.1
1000 ... 999999 1
ISE [µmol/l] 0.000 ... 9.999 0,001
10.00 ... 99.99 0,01
100.0 ... 999.9 0.1
1000 ... 999999 1
[mmol/l] 1000 ... 999999 1
ISE [mg/kg] 0.000 ... 9.999 0,001
10.00 ... 99.99 0,01
100.0 ... 999.9 0.1
1000 ... 999999 1
ISE [ppm] 0.000 ... 9.999 0,001
10.00 ... 99.99 0,01
100.0 ... 999.9 0.1
1000 ... 999999 1
ISE [%] 0.000 ... 9.999 0,001
10.00 ... 99.99 0,01
100.0 ... 999.9 0.1
1000 ... 999999 1

Manual Variable Range Increment

temperature input Tmanual [°C] - 20 ... + 130 1

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Technical data pH/Cond 3320

14.1.3 Cond

Measuring ranges, Variable Measuring range Resolution

resolution
(depending on the sen- ϰ[µS/cm] 0.000 ... 1.999* 0.001
sor) 0.00 ... 19.99** 0.01
0.0 ... 199.9 0.1
200 ... 1999 1

ϰ [mS/cm] 2.00 ... 19.99 0.01

20.0 ... 199.9 0.1
200 ... 1000 1
ρ (Resistivity) 1.000 ... 1.999 0.001
[Ohm*cm] 2.00 ... 19.99 0.01
20.0 ... 199.9 0.1
200 ... 1999 1
ρ (Resistivity) 2.00 ... 19.99 0.01
[kOhm*cm] 20.0 ... 199.9 0.1
200 ... 1999 1
ρ (Resistivity) 2.00 ... 19.99** 0.01
[MOhm*cm] 20.0 ... 199.9* 0.1
SAL 0.0 ... 70.0 0.1
according to the IOT
table
TDS 0 ... 1999 mg/l 1
2.00 ... 19.99 g/l 0.01
20.0 ... 199.9 g/l 0.1
T [°C] -5.0 ... +105.0 0.1
T [°F] +23.0 ... +221.0 0.1
* only possible with cells of the cell constant, 0.010 cm-1
** only possible with cells of the cell constant, 0.010 cm-1 or 0.090 ...
0.110 cm-1

Cell constants Cell constant C Values

Can be calibrated in 0.450 ... 0.500 cm-1
the ranges 0.800 ... 0.880 cm-1
Adjustable 0.090 ... 0.110 cm-1
0.010 cm-1 (fixed)
0,250 ... 25,000 cm-1

Reference temperature Reference tempera- Values

ture
Adjustable 20 °C (Tref20)
25 °C (Tref25)

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pH/Cond 3320 Technical data

Accuracy (± 1 digit) Variable Accuracy Temperature of the test

sample
ϰ and ρ / temperature compensation
None (Off) ± 0.5 %
Nonlinear (nLF) ± 0.5 % 0 °C ... +35 °C
according to EN 27 888
± 0.5 % +35 °C ... +50 °C
enhanced nLF function
Linear (lin) ± 0.5 % +10 °C ... +75 °C
SAL / range
0.0 ... 42.0 ± 0.1 +5 °C ... +25 °C
± 0.2 +25 °C ... +30 °C
TDS [mg/l]
± 0.5 %
T [°C] / temperature sensor
NTC 30 ± 0.1
PT 1000 ± 0.1

The accuracy values specified here apply exclusively to the meter.

The accuracy of the measuring cell has also to be taken into
account.

Further data are given in the documentation of your sensor.

14.2 General data

Dimensions ca. 180 x 80 x 55 mm

Weight Approx. 0.4 kg
Mechanical structure Type of protection IP 67
Electrical safety Protective class III
Test certificates CE

Ambient Storage -25 °C ... +65 °C

conditions Operation -10 °C ... +55 °C
Admissible relative Yearly mean: < 75 %
humidity 30 days/year: 95 %
Other days: 85 %

ba77054e03 03/2018 85
Technical data pH/Cond 3320

Power Batteries 4 x 1.5 V alkali-manganese batteries, type

supply AA
Rechargeable batter- 4 x 1.2 V NiMH rechargeable batteries,
ies type AA
(no charging function)
Operational life Up to 1000 h without / 150 h with illumination

pH sensor input Input resistance > 5 * 1012 ohm

Input current < 1 * 10-12 A

USB interface Type USB 1.1

USB B (device), data output
Baud rate Adjustable:
1200, 2400, 4800, 9600, 19200 Baud
Data bits 8
Stop bits 2
Parity None
Handshake RTS/CTS
Cable length Max. 3 m

Guidelines EMC EC directive 2004/108/EC

and norms used EN 61326-1
EN 61000-3-2
EN 61000-3-3
FCC Class A
Meter safety EC directive 2006/95/EC
EN 61010-1
IP protection class EN 60529

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pH/Cond 3320 Firmware update

15 Firmware update
Available firmware updates are provided on the Internet.
With the firmware update program and a PC you can update the firmware of the
pH/Cond 3320 to the newest version.
For the update you have to connect the meter to a PC.
For the update via the USB interface, the following is required:
 a free USB interface (virtual COM port) on the PC
 the driver for the USB interface (on the enclosed CD-ROM)
 the USB cable (included in the scope of delivery of the pH/Cond 3320).

1. Install the downloaded firmware update on a PC.

An update folder is created in the Windows start menu.
If an update folder already exists for the meter (or meter type), the new
data is displayed there.
2. In the windows start menu, open the update folder and start the firmware
update program.
3. Using the USB interface cable, connect the pH/Cond 3320 to a USB
interface (virtual COM port) of the PC.
4. Switch on the pH/Cond 3320.
5. In the firmware update program, start the update process with OK.
6. Follow the instructions of the firmware update program.
During the programming process, a corresponding message and a
progress bar (in %) are displayed.
The programming process takes approx. three minutes. A terminatory
message is displayed after a successful programming process. The
firmware update is completed.
7. Disconnect the pH/Cond 3320 from the PC.
The pH/Cond 3320 is ready for operation again.

After switching the meter off and on you can check whether the meter has taken
over the new software version (see YOU WANT TO KNOW WHICH SOFTWARE
VERSION IS IN THE METER, PAGE 81).

ba77054e03 03/2018 87
Glossary pH/Cond 3320

16 Glossary
pH/ORP/ISE

Asymmetry see zero point

Electromotive force of The electromotive force U of the electrode is the measurable electromo-
an electrode tive force of an electrode in a solution. It equals the sum of all the gal-
vanic voltages of the electrode. Its dependency on the pH results in the
electrode function, which is characterized by the parameters, slope and
zero point.
Junction The junction is a porous body in the housing wall of reference elec-
trodes or electrolyte bridges. It arranges the electrical contact between
two solutions and makes the electrolyte exchange more difficult. The
expression, junction, is also used for ground or junction-less transitions.
ORP The ORP is caused by oxidizing or reducing substances dissolved in
water if these substances become effective on an electrode surface
(e.g. a gold or platinum surface).
pH value The pH value is a measure of the acidic or basic effect of an aqueous
solution. It corresponds to the negative decadic logarithm of the molal
hydrogen ions activity divided by the unit of the molality. The practical
pH value is the value of a pH measurement.
Potentiometry Name of a measuring technique. The signal (depending on the mea-
sured parameter) of the electrode is the electrical potential. The electri-
cal current remains constant.
Slope The slope of a linear calibration function.
Zero point The zero point of a pH electrode is the pH value at which the electromo-
tive force of the pH electrode at a specified temperature is zero. Nor-
mally, this is at 25 °C.

Conductivity

Cell constant C Characteristic quantity of a conductivity measuring cell, depending on

the geometry.
Conductivity Short form of the expression, specific electrical conductivity.
It corresponds to the reciprocal value of the resistivity.
It is a measured value of the ability of a substance to conduct an electric
current. In water analysis, the electrical conductivity is a dimension for
the ionized substances in a solution.
Reference tempera- Fixed temperature value to compare temperature-dependent measured
ture values. For conductivity measurements, the measured value is con-
verted to a conductivity value at a reference temperature of 20 °C or 25
°C.
Resistance Short name for the specific electrolytic resistance. It corresponds to the
reciprocal value of the electrical conductivity.

88 ba77054e03 03/2018
pH/Cond 3320 Glossary

Salinity The absolute salinity SA of seawater corresponds to the relationship of

the mass of dissolved salts to the mass of the solution (in g/Kg). In prac-
tice, this dimension cannot be measured directly. Therefore, the practi-
cal salinity according to IOT is used for oceanographic monitoring. It is
determined by measuring the electrical conductivity.
Salt content General designation for the quantity of salt dissolved in water.
Temperature coeffi- Value of the slope α of a linear temperature function.
cient 1
=
TRef Meas * 1 + a * (T - TRef )

Temperature compen- Name of a function that considers the temperature influence on the
sation measurement and converts it accordingly. Depending on the measured
parameter to be determined, the temperature compensation functions
in different ways. For conductimetric measurements, the measured
value is converted to a defined reference temperature. For potentiomet-
ric measurements, the slope value is adjusted to the temperature of the
test sample but the measured value is not converted.

General topics

Adjusting To manipulate a measuring system so that the relevant value (e.g. the
displayed value) differs as little as possible from the correct value or a
value that is regarded as correct, or that the difference remains within
the tolerance.
AutoRange Name of the automatic selection of the measuring range.
Calibration Comparing the value from a measuring system (e.g. the displayed
value) to the correct value or a value that is regarded as correct. Often,
this expression is also used when the measuring system is adjusted at
the same time (see adjusting).
Channel A channel is a display indication that corresponds to a physical connec-
tion on the meter.
Measured parameter The measured parameter is the physical dimension determined by
measuring, e.g. pH, conductivity or D.O. concentration.
Measured value The measured value is the special value of a measured parameter to be
determined. It is given as a combination of the numerical value and unit
(e.g. 3 m; 0.5 s; 5.2 A; 373.15 K).
Molality Molality is the quantity (in Mol) of a dissolved substance in 1000 g sol-
vent.
Reset Restoring the original condition of all settings of a measuring system.
Resolution Smallest difference between two measured values that can be dis-
played by a meter.
Stability control (Au- Function to control the measured value stability.
toRead )

ba77054e03 03/2018 89
Glossary pH/Cond 3320

Standard solution The standard solution is a solution where the measured value is known
by definition. It is used to calibrate a measuring system.
Temperature function Name of a mathematical function expressing the temperature behavior
of a test sample, a sensor or part of a sensor.
Test sample Designation of the test sample ready to be measured. Normally, a test
sample is made by processing the original sample. The test sample and
original sample are identical if the test sample was not processed.

90 ba77054e03 03/2018
pH/Cond 3320 Index

17 Index

A Measurement data memory

Automatic switch-off function . . . . . . . . . . . 16 Edit . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
AutoRead Erase . . . . . . . . . . . . . . . . . . . . . . . . . . 69
ORP . . . . . . . . . . . . . . . . . . . . . 36, 38, 46 Measurement dataset . . . . . . . . . . . . . . . . 71
pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . 45
ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
ORP . . . . . . . . . . . . . . . . . . . . . . . . . . 36
B
pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Battery compartment . . . . . . . . . . . . . . 12, 74 Menus (navigation) . . . . . . . . . . . . . . . . . . 17
Messages . . . . . . . . . . . . . . . . . . . . . . . . . 18
C
Calibration P
ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 pH buffer sets . . . . . . . . . . . . . . . . . . . . . . 51
pH . . . . . . . . . . . . . . . . . . . . . . . . . 25, 37 Print . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Calibration evaluation . . . . . . . . . . . . . . . . 49
ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
R
Calibration interval . . . . . . . . . . . . . . . . 53, 59 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Calibration points
pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 S
Connecting a PC . . . . . . . . . . . . . . . . . . . . 73 Scope of delivery . . . . . . . . . . . . . . . . . . . . 11
Connectors . . . . . . . . . . . . . . . . . . . . . . . . . 15 Single-point calibration
Control standard . . . . . . . . . . . . . . . . . . . . 47 pH . . . . . . . . . . . . . . . . . . . . . . . . . 26, 30
Copyright . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Slope
ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
D pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Dataset . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 Stability control
Date and time . . . . . . . . . . . . . . . . . . . . . . . 20 Automatic . . . . . . . . . . . . . . . . . . . . . . 62
Default settings Storing in memory . . . . . . . . . . . . . . . . . . . 66
Measured parameter . . . . . . . . . . . . . . 63 Automatic . . . . . . . . . . . . . . . . . . . . . . 67
System settings . . . . . . . . . . . . . . . . . . 64 Manual . . . . . . . . . . . . . . . . . . . . . . . . 66
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Storing interval . . . . . . . . . . . . . . . . . . . . . 67

E T
Energy saving mode . . . . . . . . . . . . . . . . . 68 TDS factor . . . . . . . . . . . . . . . . . . . . . . . . . 60
Temperature compensation . . . . . . . . . . . 59
Temperature measurement
F
ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Firmware update . . . . . . . . . . . . . . . . . . . . 87 pH . . . . . . . . . . . . . . . . . . . . . . . . . 24, 37
Three-point calibration
I ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Initial commissioning . . . . . . . . . . . . . . . . . 11 pH . . . . . . . . . . . . . . . . . . . . . . . . . 27, 31
Initialize . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 Transmitting data . . . . . . . . . . . . . . . . . . . 72
Interval for calibration . . . . . . . . . . . . . . 53, 59 Automatic . . . . . . . . . . . . . . . . . . . . . . 72
Manual . . . . . . . . . . . . . . . . . . . . . . . . 72
K Transmitting measured values . . . . . . . . . 72
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Two-point calibration
ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
M pH . . . . . . . . . . . . . . . . . . . . . . . . . 26, 30
Measured value display . . . . . . . . . . . . . . . 17
Measurement accuracy . . . . . . . . . . . . 54, 59

ba77054e03 03/2018 91
Index pH/Cond 3320

Z
Zero point of pH electrode . . . . . . . . . . . . . 25

92 ba77054e03 03/2018
What can Xylem do for you?
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For more information on how Xylem can help you, go to xyleminc.com.

Service address:
Xylem Analytics Germany
Sales GmbH & Co. KG
WTW
Dr.-Karl-Slevogt-Str. 1
82362 Weilheim
Germany

Tel.: +49 881 183-325

Fax: +49 881 183-414
E-Mail wtw.rma@xyleminc.com
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Xylem Analytics Germany GmbH

Dr.-Karl-Slevogt-Str. 1
82362 Weilheim
Germany