pH 3210
HOLD AR
25.0
6.093
p
H
°C
Menu
15.11.2008
08:37
Operating manual
ba75793e02 12/2008
pH meter
pH 3210
Accuracy when
going to press
The use of advanced technology and the high quality standard of our
instruments are the result of a continuous development. This may result in
differences between this operating manual and your meter. Also, we cannot
guarantee that there are absolutely no errors in this manual. Therefore, we
are sure you will understand that we cannot accept any legal claims resulting
from the data, figures or descriptions.
Copyright
© Weilheim 2008, WTW GmbH
Reproduction in whole - or even in part - is prohibited without the express
written permission of WTW GmbH, Weilheim.
Printed in Germany.
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pH 3210 Contents
pH 3210 - Contents
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3 Socket field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . 10
3 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1 Scope of delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2.1 Inserting the batteries. . . . . . . . . . . . . . . . . . . . . 13
3.2.2 Switching on the meter. . . . . . . . . . . . . . . . . . . . 14
3.2.3 Setting the date and time . . . . . . . . . . . . . . . . . 14
4 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1 Switching on the meter . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2 General operating principles . . . . . . . . . . . . . . . . . . . . . . 16
4.2.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . 16
4.2.2 Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.2.3 Example 1 on navigation: Setting the language. 19
4.2.4 Example 2 on navigation: Setting the date and
time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.3 Sensor-independent settings . . . . . . . . . . . . . . . . . . . . . 24
4.3.1 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.3.2 Data storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.3.3 Automatic Stability control . . . . . . . . . . . . . . . . . 26
4.4 pH value / ORP voltage. . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.4.1 General information . . . . . . . . . . . . . . . . . . . . . . 27
4.4.2 Measuring the pH value . . . . . . . . . . . . . . . . . . . 28
4.4.3 Measuring the ORP . . . . . . . . . . . . . . . . . . . . . . 30
4.4.4 Settings for pH and ORP measurements. . . . . . 32
4.4.5 pH calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.4.6 Calibration interval . . . . . . . . . . . . . . . . . . . . . . . 39
4.4.7 Carrying out an automatic calibration (AutoCal) 40
4.4.8 Carrying out a manual calibration (ConCal). . . . 44
4.4.9 Displaying calibration records . . . . . . . . . . . . . . 47
4.4.10 Continuous measurement control (CMC
function) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
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Contents pH 3210
4.5 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
4.5.1 Manual storage . . . . . . . . . . . . . . . . . . . . . . . . . . 50
4.5.2 Editing the measured value storage . . . . . . . . . . 51
4.5.3 Erasing the measurement data storage . . . . . . . 52
4.6 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
4.6.1 Resetting the measurement settings . . . . . . . . . 53
4.6.2 Resetting the system settings. . . . . . . . . . . . . . . 54
5 Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . 55
5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
5.1.1 Replacing the batteries. . . . . . . . . . . . . . . . . . . . 55
5.2 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
5.3 Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
5.4 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
7.1 General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
7.2 Measuring ranges, resolution, accuracy . . . . . . . . . . . . . 62
8 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
4
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pH 3210 Overview
HOLD AR
25.0
6.093
p
H
°C
Menu
15.11.2008
08:37
1
2
3
1Overview
The compact pH 3210 precision pH meter enables you to perform pH
measurements rapidly and reliably. The pH 3210 provides the
maximum degree of operating comfort, reliability and measuring
certainty for all applications.
The proven calibration procedures and automatic stability control
function (AR) support your work with the pH meter.
1 Keypad
2 Display
3 Socket field
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Overview pH 3210
ENTER
M
pH 3210
F1
F2
AR
CAL
STO
RCL
F1
F2
CAL
STO
RCL
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>:
<F1
_>:
<F2>:
<F2
_>:
<On/Off>: Switches the meter on or off
<M>: Selects the measured parameter
<CAL>:
<CAL
_>:
<STO>:
<STO_>
<RCL>:
<RCL_>
_>).
Softkey providing situation dependent functions , e.g.:
<F1>/[Menu]: Opens the menu for measurement settings
_>/[Menu]: Opens the menu for system settings
<F1
Calls up the calibration procedure
Displays the calibration data
Stores a measured value manually
Displays the manually stored measured values
<▲>: Increments values, scrolls
6
<▼>: Decrements values, scrolls
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pH 3210 Overview
ENTER
AR
HOLD AR
25.0
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3
2
5
6
7
8
1
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Menu
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<ENTER>:
<ENTER
<AR> Freezes the measured value (HOLD function)
_>:
Opens the menu for measurement settings / confirms
entries
Opens the menu for system settings
Switches the AutoRead measurement on or off
1.2 Display
1 Status information
2 Measured value (with unit)
3 Measured parameter
4 Continuous measurement control (CMC function)
5 Sensor symbol (calibration evaluation, calibration
interval)
6 Measured temperature (with unit)
7 Status line
8 Softkeys and date + time
Function display
indicators
AutoCal
e.g. TEC
ConCal Calibration with any buffers
Error An error occurred during calibration
LoBat Batteries are almost empty
AR Stability control (AutoRead) is active
Calibration with automatic buffer recognition, e.g.
with the buffer set: Technical buffers
HOLD Measured value is frozen (<AR> key)
7
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Overview pH 3210
4
1
2
3
1.3 Socket field
Connectors:
1 pH electrode
2 Reference electrode
3 Temperature sensor
4 Service interface
Caution
Only connect sensors to the meter that cannot return any voltages
or currents that are not allowed (> SELV and > current circuit with
current limiting).
Almost all customary sensors fulfill these conditions.
8
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pH 3210 Safety
2 Safety
This operating manual contains basic instructions that you must follow
during the commissioning, operation and maintenance of the meter.
Consequently, all responsible personnel must read this operating
manual before working with the meter.
The operating manual must always be available within the
vicinity of the meter.
Target group The meter was developed for work in the field and in the laboratory.
Thus, we assume that, as a result of their professional training and
experience, the operators will know the necessary safety precautions
to take when handling chemicals.
Safety instructions Safety instructions in this operating manual are indicated by the
warning symbol (triangle) in the left column. The signal word (e.g.
"Caution") indicates the level of danger:
Further notes
Warning
indicates instructions that must be followed precisely in order to
avoid possibly great dangers to personnel.
Caution
indicates instructions that must be followed precisely in order to
avoid the possibility of slight injuries or damage to the meter or
the environment.
Note
indicates notes that draw your attention to special features.
Note
indicates cross-references to other documents, e.g. operating
manuals.
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Safety pH 3210
2.1 Authorized use
This meter is authorized exclusively for pH and ORP measurements in
a laboratory or field environment.
The technical specifications as given in chapter 7 T
ECHNICAL DATA must
be observed. Only the operation and running of the meter according to
the instructions given in this operating manual is authorized.
Any other use is considered unauthorized.
2.2 General safety instructions
This meter is constructed and tested in compliance with the IEC 1010
safety regulations for electronic measuring instruments.
It left the factory in a safe and secure technical condition.
Function and
operational safety
The smooth functioning and operational safety of the meter can only be
guaranteed if the generally applicable safety measures and the specific
safety instructions in this operating manual are followed during
operation.
The smooth functioning and operational safety of the meter can only be
guaranteed under the environmental conditions that are specified in
chapter 7 T
ECHNICAL DATA.
If the meter was transported from a cold environment to a warm
environment, the formation of condensate can lead to the faulty
functioning of the meter. In this event, wait until the temperature of the
meter reaches room temperature before putting the meter back into
operation.
Caution
The meter is only allowed to be opened by authorized personnel.
10
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pH 3210 Safety
Safe operation If safe operation is no longer possible, the meter must be taken out of
service and secured against inadvertent operation!
Safe operation is no longer possible if the meter:
z has been damaged in transport
z has been stored under adverse conditions for a lengthy period of
time
z is visibly damaged
z no longer operates as described in this manual.
If you are in any doubt, please contact the supplier of the meter.
Obligations of the
purchaser
The purchaser of this meter must ensure that the following laws and
guidelines are observed when using dangerous substances:
z EEC directives for protective labor legislation
z National protective labor legislation
z Safety regulations
z Safety datasheets of the chemical manufacturers.
Caution
In addition to the safety instructions mentioned here, also follow
the safety instructions of the sensors used.
The operating manuals of the sensors are available on the
supplied CD and on the Internet under www.WTW.com.
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11
Safety pH 3210
12
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pH 3210 Commissioning
2
1
3 Commissioning
3.1 Scope of delivery
z pH meter, pH 3210
z 4 batteries 1.5 V Mignon type AA
z Short instructions
z CD-ROM with detailed operating manual
3.2 Initial commissioning
Perform the following activities:
z Insert the supplied batteries
z Switch on the meter
z Set the date and time
3.2.1 Inserting the batteries
1 Unscrew the two screws (1) on the underside of the meter.
2 Open the battery compartment (2) on the underside of the
meter.
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3 Place four batteries (type Mignon AA) in the battery
compartment.
13
Commissioning pH 3210
Note
Alternatively, you can also use Ni-MH rechargeable batteries (type
Mignon AA). In order to charge the batteries, an external charging
device is required.
Caution
Make sure that the poles of the batteries are positioned correctly.
The
± signs on the batteries must correspond to the ± signs in the
battery compartment.
4 Close the battery compartment (2) and tighten the screws (1).
3.2.2 Switching on the meter
1 Press the <On/Off> key.
The meter performs a self-test.
The display shows the manufacturer's logo while the self-test
is being performed.
Subsequently, the meter switches to the measuring mode
(measured value display).
Note
The meter has an energy saving feature to avoid unnecessary battery
depletion.
The energy saving feature switches off the meter if no key is pressed
during the adjusted interval. (How to set the switch-off interval, see
section 4.3.1).
3.2.3 Setting the date and time
2 See section 4.2.4
14
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pH 3210 Operation
pH
6.949
25.0
°C
22.09.2008
08:00
Menu
4 Operation
4.1 Switching on the meter
Switching on Press the <On/Off> key.
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.
Switching off Press the <On/Off> key.
Automatic switch-off The instrument has an automatic switch-off function in order to save the
batteries (see section 4.3.1). The automatic switch-off switches off the
meter if no key is pressed for an adjustable period.
Display illumination The meter automatically switches off the display illumination if no key
has been pressed for 15 seconds. The illumination is switched on with
the next keystroke again.
You can also generally switch the display illumination on or off (see
section 4.3.1).
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Operation pH 3210
4.2 General operating principles
This section contains basic information on the operation of the
pH 3210.
Operating elements,
display
Operating modes,
navigation
An overview of the operating elements and the display is given in
section 1.1 and section 1.2.
An overview of the operating modes and navigation of the pH 3210 is
given in section 4.2.1 and section 4.2.2.
4.2.1 Operating modes
The meter has the following operating modes:
z Measurement
The measurement data of the connected sensor is shown in the
measured value display
z Calibration
The course of a calibration with calibration information, functions
and settings is displayed
z Storage in memory
The meter stores measuring data automatically or manually
z Setting
The system menu or a sensor menu with submenus, settings and
functions is displayed
16
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pH 3210 Operation
General
Measurement
Interface
Clock
Service information
Reset
System
22.09.2008
08:00
Back
Language: Deutsch
Beep: Off
Illumination
: On
Contrast: 50 %
Switchoff time: 1 h
General
22.09.2008
08:00
Back
4.2.2 Navigation
Measured value display In the measured value display, you can
z open the respective measuring menu with <F1> (short
keystroke).
z open the Storage & config menu with the sensor-independent
settings by pressing <F1
_> (long keystroke, approx. 2 s on <F1>).
z change the display in the selected measuring window
(e. g. pH <−> mV) by pressing <M>.
Menus and dialogs The menus for settings and dialogs in procedures contain further
submenus. The selection is made with the <▲><▼> keys. The current
selection is displayed with a frame.
z Submenus
The name of the submenu is displayed at the upper edge of the
frame. Submenus are opened by confirming with <ENTER>.
Example:
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z 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:
17
Operation pH 3210
Calibration record
Buffer
: AutoCalTEC
One point calibration: Yes
Calibration interval: 7 d
Unit for slope
: mV/pH
i
2.00 4.01 7.00 10.01
pH
22.09.2008
08:00
Back
Calibration record
Buffer
: AutoCalTEC
One point calibration: Yes
Calibration interval: 7 d
Unit for slope
: mV/pH
i
2.00 4.01 7.00 10.01
pH
22.09.2008
08:00
Back
z 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.
i
Messages Information is marked by the
symbol. It cannot be selected.
Example:
18
Note
The principles of navigation are explained in the two following sections
by reference of examples:
z Setting the language (section 4.2.3)
z Setting the date and time (see section 4.2.4).
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pH 3210 Operation
pH
6.949
25.0
°C
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08:00
Menu
System
Data storage
Storage & config
22.09.2008
08:00
Back
4.2.3 Example 1 on navigation: Setting the language
1 Press the <On/Off> key.
The measured value display appears.
The instrument is in the measuring mode.
2 Using <F1_>/[Menu] open the Storage & config menu.
The instrument is in the setting mode.
3 Select the System submenu with <▲><▼>.
The current selection is displayed with a frame.
4 Open the System submenu with <ENTER>.
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Operation pH 3210
General
Measurement
Interface
Clock
Service information
Reset
System
22.09.2008
08:00
Back
Language: Deutsch
Beep: Off
Illumination: On
Contrast
: 50 %
Switchoff time: 1 h
General
22.09.2008
08:00
Back
Language: Deutsch
Beep: Off
Illumination: On
Contrast
: 50 %
Switchoff time: 1 h
General
22.09.2008
08:00
Back
5 Select the General submenu with <▲><▼>.
The current selection is displayed with a frame.
6 Open the General
submenu with <ENTER>.
7 Open the setting mode for the Language with <ENTER>.
20
8 Select the required language with <▲><▼>.
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pH 3210 Operation
9 Confirm the setting with <ENTER>.
The meter switches to the measuring mode.
The selected language is active.
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Operation pH 3210
Date format: dd.mm.yyyy
Date: 30.10.2008
Time
: 14:53:40
Clock
22.09.2008
08:00
Back
4.2.4 Example 2 on navigation: Setting the date and time
The meter has a clock with a date function. The date and time are
indicated in the status line of 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 following functions and displays:
z Current date and time
z Calibration date
z Identification of stored measured values.
Therefore, check the time at regular intervals.
Note
After a fall of the supply voltage (empty batteries), the date and time are
reset to 01.01.2008 00, 00:00 hours.
Setting the date, time
and date format
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:
Using <F1
_>/[Menu], open the Storage & config menu.
The instrument is in the setting operating 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.
22
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pH 3210 Operation
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 If necessary, select and set the Date with <▲><▼> and
<ENTER>.
9 To make further settings, switch to the next higher menu level
with <F1>/[Back].
or
Switch to the measured value display with <M>.
The instrument is in the measuring mode.
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Operation pH 3210
4.3 Sensor-independent settings
The Storage & config menu comprises the following settings:
z System (see section 4.3.1).
z Data storage (see section 4.3.1)
4.3.1 System
Overview The following sensor-independent meter characteristics can be
adjusted in the Storage & config/System menu:
z Menu language
z Illumination
z Display contrast
z Interval of the automatic switch-off
z Clock and date function
z Reset of all sensor-independent system settings to the default
condition
Settings To open the Storage & config menu, press the <F1
<ENTER>key in the measured value display. After completing the
settings, switch to the measured value display with <M>.
Menu item Setting Description
System / General /
Language
System / General /
Illumination
System / General /
Contrast
System / General /
Switchoff time
Deutsch
English
(further)
Auto
On
Off
0 ... 100 % Changing the display
10 min ... 24 h Adjust the switch-off time
Select the menu language
Switching the display
illumination on/off
contrast
_>/[Menu] or
24
System /Clock Time
Date
Date format
System /Service
information
Settings of time and date.
For details, see section
4.2.4
Hardware version and
software version of the
meter are displayed.
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pH 3210 Operation
Menu item Setting Description
System /Reset - Resets the system settings
to the default values.
For details, see section
4.6.2
4.3.2 Data storage
This menu contains all functions to display, edit and erase stored
measured values and calibration records.
Note
Detailed information on the storage functions of the pH 3210 is given in
section 4.5.
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Operation pH 3210
4.3.3 Automatic Stability control
The automatic Stability control 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 section 4.3.1).
The measured parameter flashes on the display
z as soon as the measured value is outside the allowed stability range
z if you switch over between the measured parameters with <M>.
z if the automatic Stability control function is switched off.
26
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pH 3210 Operation
4.4 pH value / ORP voltage
4.4.1 General information
You can measure the following variables:
z pH value [ ]
z ORP [mV]
Temperature
measurement
For reproducible pH measurements, it is essential to measure the
temperature of the test sample.
You have the following possibilities to measure the temperature:
z Automatic measurement of the temperature by the temperature
sensor (NTC30 or Pt1000) integrated in electrode.
z Manual determination and input of the temperature.
The meter 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
sensor
Resolution of
the temp.
Mode
display
yes 0.1 °C Automatic with temperature
sensor
- 1 °C Manual
Preparatory activities Perform the following preparatory activities when you want to measure:
1 Connect a pH or ORP electrode to the meter.
The pH measuring window is displayed.
2 If necessary, select the pH or mV display with <M>.
3 Adjust the temperature of the solutions and measure the
current temperature if the measurement is made without a
temperature sensor.
4 Calibrate or check the meter with the combination electrode.
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Operation pH 3210
pH
6.949
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4.4.2 Measuring the pH value
1 Perform the preparatory activities according to section 4.4.1.
2 Immerse the pH electrode in the test sample.
Stability control
(AutoRead )
3 Select the pH or mV display with <M>.
The stability control function (AutoRead) continually checks the stability
of the measurement signal. The stability has a considerable impact on
the reproducibility of measured values. The display of the measured
parameter flashes until a stable measured value is available.
You can start the Stability control manually at any time, irrespective of
the setting for automatic Stability control (see page 26) in the System
menu.
1 Freeze the measured value with <AR>.
The [HOLD] status indicator is displayed.
2Using <ENTER>, activate the Stability control function
manually.
The [AR] status indicator appears while the measured value is
assessed as not stable. The display of the measured
parameter flashes.
The [HOLD][AR] status indicator appears as soon as a stable
measured value is recognized.
28
Note
You can prematurely terminate the Stability control function manually
with <ENTER> at any time.
3 Release the frozen measured value again with <AR> or <M>.
The [AR] status display disappears. The display switches back
to the previous representation.
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pH 3210 Operation
Criteria for a stable
measured value
The Stability control function checks whether the measured values are
stable within the monitored time interval.
Measured
Time interval Stability in the time interval
parameter
pH value 15 seconds
Δ pH: better than 0.01
The minimum duration until a measured value is assessed as stable is
the monitored time interval. The actual duration is mostly longer.
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Operation pH 3210
U
157.0 mV
24.8 °C
22.09.2008
08:00
Menu
4.4.3 Measuring the ORP
Note
ORP electrodes are not calibrated. However, you can check ORP
electrodes using a test solution.
1 Perform the preparatory activities according to section 4.4.1.
2 Submerse the ORP electrode in the sample.
Stability control
(AutoRead )
3 Select the mV display with <M>.
The stability control function (AutoRead) continually checks the stability
of the measurement signal. The stability has a considerable impact on
the reproducibility of measured values. The display of the measured
parameter flashes until a stable measured value is available.
You can start the Stability control manually at any time, irrespective of
the setting for automatic Stability control (see page 26) in the System
menu.
1 Freeze the measured value with <AR>.
The [HOLD] status indicator is displayed.
2Using <ENTER>, activate the Stability control function
manually.
The [AR] status indicator appears while the measured value is
assessed as not stable.
The [HOLD][AR] status indicator appears as soon as a stable
measured value is recognized. The current measurement data
are output to the interface.
Measurement data meeting the stability control criterion are
marked by AR.
30
Note
You can prematurely terminate the Stability control function manually
with <ENTER> at any time. If the Stability control function is
ba75793e02 12/2008
pH 3210 Operation
prematurely terminated, the current measurement data are not output
to the interface.
3 Release the frozen measured value again with <AR> or <M>.
The [AR] status display disappears. The display switches back
to the previous representation.
Criteria for a stable
measured value
The Stability control function checks whether the measured values are
stable within the monitored time interval.
Measured
parameter
ORP 15 seconds
Time interval Stability in the time
interval
Δ mV: better than 0.3
The minimum duration until a measured value is assessed as stable is
the monitored time interval. The actual duration is mostly longer.
ba75793e02 12/2008
31
Operation pH 3210
4.4.4 Settings for pH and ORP measurements
Overview The following settings are possible for pH and ORP measurements:
z Resolution
z Calibration interval
z Buffers for calibration
z Unit of the temperature
z Automatic stability control
z Unit for slope
z Calibration record (display)
Settings The settings are made in the measuring menu of the pH/ORP
measurement. To open the settings, activate the relevant measuring
window in the measured value display and press the <ENTER> key
shortly
. After completing the settings, switch to the measured value
display with <M>.
Menu item Possible
setting
Calibration /
- Displays the calibration
Calibration record
Calibration /Buffer TEC
NIST/DIN
ConCal
...
Calibration /One
point calibration
Calibration /
Yes
No
1 ... 999 d Calibration interval for the
Calibration interval
Calibration /Unit for
slope
mV/pH
%
Description
record of the last calibration.
Buffer sets to be used for pH
calibration.
More buffers and details,
see section 4.4.5.
Rapid calibration with 1
buffer
pH electrode (in days).
The meter reminds you to
calibrate regularly by the
flashing sensor symbol in
the measuring window.
Unit of the slope.
The % display refers to the
Nernst slope of
-59.16 mV/pH (100 x
determined slope/Nernst
slope).
32
Man. temperature -25 ... +130 °C Entry of the manually
determined temperature.
For measurements without
temperature sensor only.
ba75793e02 12/2008
pH 3210 Operation
Menu item Possible
Description
setting
Temperature unit °C
°F
Temperature unit,
degrees Celsius or degrees
Fahrenheit.
All temperatures are
displayed with the selected
unit.
Resolution pH 0.001
0.01
Resolution of the pH
display:
0.1
Resolution mV 0.1
1
Resolution of the mV
display:
Stability control On / Off Switches on or off the
automatic stability control
during measurement (see
section 4.3.3)
Reset - Resets all sensor settings to
the delivery condition (see
section 4.6.1).
ba75793e02 12/2008
33
Operation pH 3210
4.4.5 pH calibration
Why calibrate? pH combination electrodes age. This changes the zero point
(asymmetry) and slope of the pH combination 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.
When do you have to
calibrate?
Buffer sets for
calibration
z After connecting another combination electrode
z When the calibration interval has expired
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 the calibration.
No. Buffer set* pH
at
values
1 ConCal Any Any
2 NIST/DIN
DIN buffers according to DIN 19266
and NIST Traceable Buffers
1.679
4.006
6.865
25 °C
9.180
12.454
3 TEC
WTW Technical buffers
2.000
4.010
25 °C
7.000
10.011
34
4 Merck 1* 4.000
7.000
9.000
5 Merck 2 * 1.000
6.000
8.000
13.000
6 Merck 3 * 4.660
6.880
9.220
ba75793e02 12/2008
20°C
20°C
20°C
pH 3210 Operation
No. Buffer set* pH
values
7 Merck 4 * 2.000
4.000
7.000
10.000
8 Merck 5* 4.010
7.000
10.000
9 DIN 19267 1.090
4.650
6.790
9.230
10 Mettler Toledo USA * 1.679
4.003
7.002
10.013
11 Mettler Toledo EU * 1.679
4.003
7.002
10.013
at
20°C
25 °C
25 °C
25 °C
25 °C
12 Fisher * 2.007
4.002
7.004
10.002
13 Fluka BS * 4.006
6.984
8.957
14 Radiometer * 1.678
4.005
7.000
9.180
15 Baker * 4.006
6.991
10.008
16 Metrohm * 3.996
7.003
8.999
17 Beckman * 4.005
7.005
10.013
25 °C
25 °C
25 °C
25 °C
25 °C
25 °C
ba75793e02 12/2008
35
Operation pH 3210
No. Buffer set* pH
values
18 Hamilton Duracal * 4.005
7.002
10.013
19 Precisa * 3.996
7.003
8.999
20 Reagecon TEC * 2.000
4.010
7.000
10.000
21 Reagecon 20 * 2.000
4.000
7.000
10.000
13.000
22 Reagecon 25 * 2.000
4.000
7.000
10.000
13.000
at
25 °C
25 °C
25 °C
20°C
25 °C
23 Riedel-de Haen * 2.000
20°C
4.000
7.000
10.000
* Brand names or trade names are trademarks of their respective owners
protected by law.
Note
The buffers are selected in the menu, pH / <F1>/[Menu] / Calibration /
Buffer (see page 32).
36
ba75793e02 12/2008
pH 3210 Operation
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:
Determined
Displayed calibration data
values
1-point Asy z Zero point = Asy
z Slope = Nernst slope
(-59.16 mV/pH at 25 °C)
2-point Asy
Slp.
3-point to
5-point
Asy
Slp.
z Zero point = Asy
z Slope = Slp.
z Zero point = Asy
z Slope = Slp.
The calibration line is calculated
by linear regression.
Note
You can display the slope in the units, mV/pH or % (see page 24).
Stability control The calibration procedure automatically activates the stability control
function. The current measurement with stability control can be
terminated at any time (accepting the current value).
Calibration record The new calibration values are displayed when the calibration is
finished.
Display calibration You can have the data of the last calibration displayed (see page 52).
Calibration evaluation After calibrating, the meter automatically evaluates the calibration. The
zero 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
record
Zero point
[mV]
Slope
[mV/pH]
+++ -15 ... +15 -60.5 ... -58
++ - 20 ... +20 -58 ... -57
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37
Operation pH 3210
Display Calibration
record
+ - 25 ... +25 -61 ... -60.5
- -30 ... +30 -62 ... -61
Clean the combination electrode
according to the electrode operating
manual
Error Error
Eliminate the error according to chapter
HAT TO DO IF... (page 57)
6 W
Zero point
[mV]
< -30 or
> 30
Slope
[mV/pH]
or
-57 ... -56
or
-56 ... -50
... -62 or
... -50
38
ba75793e02 12/2008
pH 3210 Operation
Preparatory activities Perform the following preparatory activities when you want to calibrate:
1 Connect the pH combination electrode to the meter.
The pH measuring window is displayed.
2 Keep the buffer solutions ready. Adjust the temperature of the
buffer solutions, or measure the current temperature, if you
measure without a temperature sensor.
4.4.6 Calibration interval
The calibration evaluation is indicated on the display as a sensor
symbol.
The sensor symbol flashes after the adjusted calibration interval has
expired. It is still possible to measure.
Setting the calibration
interval
Note
To ensure the high measuring accuracy of the measuring system,
calibrate after the calibration interval has expired.
The calibration interval is set to 7 days (d7) in the factory.
You can change the interval (1 ... 999 days):
1 Open the menu for measurement settings with <F1>/[Menu].
2 In the Calibration / Calibration interval menu, set the calibration
interval with <▲><▼>.
3 Confirm the setting with <ENTER>.
4 Exit the menu with <M>.
ba75793e02 12/2008
39
Operation pH 3210
pH 1
181.3
mV
24.8 °C
AutoCal
22.09.2008
08:00
TEC
4.4.7 Carrying out an automatic calibration (AutoCal)
Make sure that the correct buffer set is selected in the sensor menu,
Buffer submenu (see page 32).
Of the selected buffer set, use one to five buffer solutions of your choice
in ascending or descending order.
Calibration with Technical buffers is described below (TEC). With other
buffer sets, other nominal buffer values are displayed. Apart from that,
the procedure is identical.
Note
If single-point calibration is set in the menu, the calibration is
automatically terminated after measurement of buffer solution 1 and
the calibration record displayed.
1 In the measured value display, select the measured parameter,
pH or mV with <M>.
2 Start the calibration with <CAL>.
The calibration display appears.
3 Immerse the electrode in buffer solution 1.
4 When measuring without temperature sensor:
Measure the temperature of the buffer manually and enter it
with <▲><▼>.
5 Start the measurement with <ENTER>.
The measured value is checked for stability (stability control).
40
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pH 3210 Operation
pH
181.3
mV
24.8 °C
AutoCal
4.010
22.09.2008
08:00
AR
TEC
pH 2
181.3
mV
24.8 °C
AutoCal
22.09.2008
08:00
TEC
6 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.
Continuing with two-
point calibration
(Buffer: TEC)
7 If necessary, terminate the calibration as a single-point
calibration with <M>.
The calibration record is displayed.
Note
For single-point calibration, the instrument uses the Nernst slope
(-59.16 mV/pH at 25 °C) and determines the zero point of the
electrode.
8 Thoroughly rinse the combination electrode with distilled water.
9 Immerse the electrode in buffer solution 2.
10 When measuring without temperature sensor:
Measure the temperature of the buffer manually and enter it
with <▲><▼>.
11 Start the measurement with <ENTER>.
The measured value is checked for stability (stability control).
ba75793e02 12/2008
41
Operation pH 3210
pH
1.3
mV
24.8 °C
AutoCal
7.000
22.09.2008
08:00
AR
TEC
pH 3
1.3
mV
24.8 °C
AutoCal
22.09.2008
08:00
TEC
12 Wait for the measurement with stability control to be completed
or terminate the stability control and take over the calibration
value with <ENTER>.
The calibration display for the next buffer appears.
Continuing with three-
to five-point calibration
(Buffer TEC)
13 If necessary, terminate the calibration as a two-point calibration
with <M>.
The calibration record is displayed.
14 Thoroughly rinse the combination electrode with distilled water.
15 Immerse the electrode in buffer solution 3.
16 When measuring without temperature sensor:
Measure the temperature of the buffer manually and enter it
with <▲><▼>.
17 Start the measurement with <ENTER>.
The measured value is checked for stability (stability control).
42
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pH 3210 Operation
pH
-178.3
mV
24.8 °C
AutoCal
10,010
22.09.2008
08:00
AR
TEC
18 Use <M> to finish calibration or
switch to calibration with the next buffer with <ENTER>.
Note
Calibration is automatically completed after the last buffer of a buffer
set has been measured. Then the calibration record is displayed.
Note
The calibration line is determined by linear regression.
ba75793e02 12/2008
43
Operation pH 3210
pH 1
6.943
24.8 °C
ConCal
22.09.2008
08:00
4.4.8 Carrying out a manual calibration (ConCal)
Single-point calibration Use any buffer solution for this rapid method.
The calibration will be the more exact the nearer the pH value of the
buffer solution is to that of the test sample.
Two-point calibration Use one or two buffer solutions for this procedure:
z first buffer solution: pH 7.0 ± 0.5
z any other buffer solution
In the sensor menu, submenu Buffer, ConCal must be set as the buffer
set (see section 4.4.4).
Note
If single-point calibration is set in the menu, the calibration is
automatically terminated and the calibration record displayed.
1 In the measured value display, select the measured parameter
pH or mV with <M>.
2 Start the calibration with <CAL>.
The calibration display appears.
3 Thoroughly rinse the combination electrode with distilled water.
4 Immerse the electrode in buffer solution 1.
5 When measuring without temperature sensor:
Measure the temperature of the buffer manually and enter it
with <▲><▼>.
6 Start the measurement with <ENTER>.
The measured value is checked for stability (stability control).
44
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pH 3210 Operation
pH
7.000
24.8 °C
ConCal
1
22.09.2008
08:00
Asymmetry
pH 2
7.000
24.8 °C
ConCal
22.09.2008
08:00
7 Wait for the measurement with stability control to be
completed.
Set the nominal buffer value for the measured temperature with
<▲><▼>.
8 Take over the calibration value for the asymmetry with
<ENTER>.
The calibration display for the next buffer appears.
ba75793e02 12/2008
9 If necessary, terminate the calibration as a single-point
calibration with <M>.
The calibration record is displayed.
Note
For single-point calibration, the instrument uses the Nernst slope
(-59.16 mV/pH at 25 °C) and determines the zero point of the
electrode.
45
Operation pH 3210
pH
10.000
24.8 °C
ConCal
2
22.09.2008
08:00
Slope
Continuing with two-
point calibration
10 Thoroughly rinse the combination electrode with distilled water.
11 Immerse the electrode in buffer solution 2.
12 When measuring without temperature sensor:
Measure the temperature of the buffer manually and enter it
with <▲><▼>.
13 Start the measurement with <ENTER>.
The measured value is checked for stability (stability control).
14 Wait for the measurement with stability control to be
completed.
Set the nominal buffer value for the measured temperature with
<▲><▼>.
15 Take over the calibration value for the slope with <ENTER>.
The calibration is completed as a two-point calibration.
The calibration record is displayed.
46
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pH 3210 Operation
4.4.9 Displaying calibration records
Displaying the
calibration record
The calibration record of the last calibration is to be found under the
menu item, Calibration / Calibration record. To open it in the measured
value display, press the <CAL
[Menu]
_> key.
ba75793e02 12/2008
47
Operation pH 3210
25.0
6.093
pH
°C
0
14
1
2
3
4
Menu
22.09.2008
08:00
4.4.10 Continuous measurement control (CMC function)
The continuous measurement control (CMC function) enables to
quickly and safely evaluate the current measured value at a glance.
After each successful calibration, the scale of the pH measuring range
is displayed in the measured value display. Here you can very easily
see whether or not the current measured value is in the calibrated part
of the measuring range.
The following information is displayed:
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 (light
gray). Measured values in this range are not suitable for
documentation. Calibrate the meter with buffers covering this
measuring range.
If the current measured value is not in the calibrated range, the
color of the range turns dark gray.
If a measured value is outside the measuring range of pH 0 - 14,
overflow arrows are displayed at the right or left edge of the
measuring range.
3 Current measured pH value (pointer)
4 Line marks for all nominal buffer values used for the last valid
calibration
The limits of the calibrated range are determined by the buffers used
for calibration:
Lower limit: Buffer with the lowest pH value minus 2 pH units
Upper limit: Buffer with the highest pH value plus 2 pH units
48
ba75793e02 12/2008
pH 3210 Operation
4.5 Storage
You can transmit measured values (datasets) to the data storage:
z Manual storage (see section 4.5.1)
Measurement dataset A complete dataset consists of:
z Date/time
z Measured value of the connected sensor
z Measured temperature value of the connected sensor
z AutoRead info: AR appears with the measured value if the
AutoRead criterion was met while storing (stable measured value).
Otherwise, the AR display is missing.
z Calibration evaluation: +++, ++, +, -, or no evaluation
Storage locations The pH 3210 meter has a measurement data memory.
Storage Maximum number of datasets
Manual data storage 200
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49
Operation pH 3210
Data record: 4 From 200
30.10.2008 11:24:16
pH 7.000 24.8 °C AR +++
ID number: 1
Continue
Manual data storage
22.09.2008
08:00
Back
Data storage full. Erase?
Yes
No
Warning
22.09.2008
08:00
Back
4.5.1 Manual storage
You can transmit a measurement dataset to the data storage as
follows:
1 Press the <STO> key shortly.
The menu for manual storage appears.
2 If necessary, change and confirm the ID number (1 ... 10000)
with <▲><▼> and <ENTER>.
The dataset is stored. The instrument switches to the
measured value display.
If the storage is full The following window appears if all 200 storage locations are occupied:
You have the following options:
z To erase the entire storage, confirm Yes.
50
z To cancel the storage process and switch to the measured value
display, confirm No.
ba75793e02 12/2008
pH 3210 Operation
Manual data storage (200)
Data record 3 of 64
30.10.2008 11:24:16
ID number: 1
pH 7.000 24.8 °C AR +++
22.09.2008
08:00
Back
4.5.2 Editing the measured value storage
The contents of the manual or automatic measurement data storage
can be shown on the display.
The measurement data storage has a function to erase the entire
contents.
Editing the data storage The storage is edited in the menu, Storage & config/ Data storage. To
open the Storage & config menu, press the <F1
_>/[Menu] key in the
measured value display.
Settings
Menu item Setting/
function
Data storage /
- Displays all measurement
Manual data storage /
Display
Data storage /
- Erases the entire manual
Manual data storage /
Erase
Description
datasets page by page.
Further options:
z Scroll through the
datasets with <▲><▼>.
z Quit the display with
<F1>/[Back].
measurement data
storage.
Note:
All calibration data remains
stored when this action is
performed.
Display presentation
Quitting the display To quit the display of stored measuring datasets, you have the
ba75793e02 12/2008
of a dataset
51
Operation pH 3210
following options:
z Switch directly to the measured value display with <M>.
z Quit the display and move to the next higher menu level with <F1>/
[Back].
4.5.3 Erasing the measurement data storage
How to erase the measurement data storage is described in section
4.5.2 E
DITING THE MEASURED VALUE STORAGE.
52
ba75793e02 12/2008
pH 3210 Operation
4.6 Reset
You can reset (initialize) all sensor settings and sensor-independent
settings separately from each other.
4.6.1 Resetting the measurement settings
Note
The calibration data are reset to the default settings together with the
measuring parameters. Recalibrate after performing a reset.
pH The following settings for pH measurements are reset to the default
settings with the Reset function:
Setting Default settings
Buffer AutoCalTEC
Cal. interval 7 d
Unit for slope mV/pH
Measured parameter pH
Resolution pH 0.001
Resolution mV 0.1
Asymmetry 0 mV
Slope -59.16 mV
Man. temperature 25 °C
One point calibration Off
The sensor settings are reset under the Reset menu item in the
measuring menu. To open the settings, activate the relevant measuring
window in the measured value display and press the <F1>/[Menu] key
shortly
.
ba75793e02 12/2008
53
Operation pH 3210
4.6.2 Resetting the system settings
The following system settings can be reset to the delivery status:
Setting Default settings
Language English
Temperature unit °C
Beep On
Contrast 50 %
Illumination On
Switchoff time 1 h
The system settings are reset in the menu, Storage & config / System
/ Reset. To open the Storage & config menu, press the <F1
key in the measured value display.
_>/[Menu]
54
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pH 3210 Maintenance, cleaning, disposal
2
1
5 Maintenance, cleaning, disposal
5.1 Maintenance
The only maintenance activity required is replacing the batteries.
Note
See the relevant operating manuals of the combination electrodes for
instructions on maintenance.
5.1.1 Replacing the batteries
1 Unscrew the two screws (1) on the underside of the meter.
2 Open the battery compartment (2) on the underside of the
meter.
ba75793e02 12/2008
3 Remove the four batteries from the battery compartment.
4 Place four new batteries (type Mignon AA) in the battery
compartment.
Note
Alternatively, you can also use Ni-MH rechargeable batteries (type
Mignon AA). In order to charge the batteries, an external charging
device is required.
Caution
Make sure that the poles of the batteries are positioned correctly.
The
± signs on the batteries must correspond to the ± signs in the
55
Maintenance, cleaning, disposal pH 3210
battery compartment.
5 Close the battery compartment (2) and tighten the screws (1).
5.2 Cleaning
Occasionally wipe the outside of the meter 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 solvents.
Remove any splashes immediately.
5.3 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.
5.4 Disposal
Note
This meter contains batteries. Batteries that have been removed must
only be disposed of at a recycling facility set up for this purpose or via
the retail outlet.
It is illegal to dispose of it in household refuse.
56
ba75793e02 12/2008
pH 3210 What to do if...
6 What to do if...
Error message
OFL, UFL
Error message
Error
Cause Remedy
pH combination electrode:
– Measured value outside the
measuring range
– Air bubble in front of the
junction
– Air in the junction – Extract air or moisten
– Cable broken – Replace combination
– Gel electrolyte dried out – Replace combination
Cause Remedy
pH combination electrode:
– The values determined for zero
point and slope of the
combination electrode are
outside the allowed limits.
– Use suitable combination
electrode
– Remove air bubble
junction
electrode
electrode
– Recalibrate
ba75793e02 12/2008
– Junction contaminated – Clean junction
– Combination electrode broken – Replace combination
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
57
What to do if... pH 3210
No stable measured
Cause Remedy
value
pH combination electrode:
– Junction contaminated – Clean junction
– Membrane contaminated – Clean membrane
Test sample:
– pH value not stable – Measure with air excluded if
necessary
– Temperature not stable – Adjust temperature if
necessary
Sensor symbol flashes
Display
Combination electrode + test
sample:
– Conductivity too low – Use suitable combination
electrode
– Temperature too high – Use suitable combination
electrode
– Organic liquids – Use suitable combination
electrode
Cause Remedy
– Calibration interval expired – Recalibrate the measuring
system
Cause Remedy
– batteries almost empty – Replace the batteries (see
section 5.1 M
AINTENANCE)
58
ba75793e02 12/2008
pH 3210 What to do if...
Obviously incorrect
measured values
Meter does not react to
keystroke
You want to know which
software
version is in the meter
Cause Remedy
pH combination electrode:
– pH combination electrode
unsuitable
– Temperature difference
between buffer and test sample
too high
– Measurement procedure not
suitable
Cause Remedy
– Operating condition undefined
or EMC load unallowed
Cause Remedy
– E. g., a question by the service
department
– Use suitable combination
electrode
– Adjust temperature of buffer
or sample solutions
– Follow special procedure
– Processor reset:
Press the <ENTER> and
<On/Off> key
simultaneously
– Switch on the meter.
Open the menu,
_>[Menu] / Storage &
<F1
config / System / Service
information. The instrument
data is displayed.
ba75793e02 12/2008
59
What to do if... pH 3210
60
ba75793e02 12/2008
pH 3210 Technical data
7 Technical data
7.1 General data
Dimensions approx. 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
conditions
Storage - 25 °C ... + 65 °C
Operation -10 °C ... + 55 °C
Climatic class 2
Power
Batteries 4 x 1.5 V alkali-manganese batteries, type
supply
Rechargeable
batteries
Operational life up to 1000 h without / 150 h with illumination
Sensor input Input resistance > 5 * 10
Input current < 1 * 10
Guidelines
EMC EC directive 2004/108/EC
and norms used
Meter safety EC directive 2006/95/EC
AA
4 x 1,2 V NiMH rechargeable batteries,
type AA (no charging function)
12
ohm
-12
A
EN 61326-1
EN 61000-3-2
EN 61000-3-3
FCC Class A
EN 61010-1
ba75793e02 12/2008
Climatic class VDI/VDE 3540
IP protection class EN 60529
61
Technical data pH 3210
7.2 Measuring ranges, resolution, accuracy
Measuring ranges,
resolution
Variable Measuring range Resolution
pH - 2.0 ... + 20.0 0.1
- 2.00 ... + 20.00 0.01
- 2.000 ... + 19.999 0.001
U [mV] - 1200.0 ... + 1200.0 0.1
- 2500 ... + 2500 1
T [°C] - 5.0 ... + 105.0 0.1
T [°F] 23.0 ... + 221.0 0.1
Manual
temperature input
Variable Range Increment
T
T
[°C] - 25 ... + 130 1
manual
[°F] -13 ... + 266 1
manual
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 ± 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
Note
The accuracy values specified here apply exclusively to the meter. The
accuracy of the combination electrodes and buffer solutions has to be
taken into account additionally.
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pH 3210 Technical data
FCC Class A Equipment Statement
Note: This equipment has been tested and found to comply with
the limits for a Class A digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is
operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instruction manual,
may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause
harmful interference in which case the user will be required to
correct the interference at his own expense.
Changes or modifications not expressly approved by the
manufacturer could void the user‘s authority to operate the
equipment.
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Technical data pH 3210
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pH 3210 Lists
8Lists
This chapter provides additional information and orientation aids.
Specialist terms The glossary briefly explains the meaning of the specialist terms.
However, terms that should already be familiar to the target group are
not described here.
Index The index will help you to find the topics that you are looking for.
Glossary
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.
Asymmetry see zero point
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).
Electromotive force of
a combination
electrode
Junction The junction is a porous body in the housing wall of reference
Measured parameter The measured parameter is the physical dimension determined by
The electromotive force U of the combination electrode is the
measurable electromotive force of a combination electrode in a
solution. It equals the sum of all the galvanic voltages of the
combination electrode. Its dependency on the pH results in the
electrode function, which is characterized by the parameters, slope
and zero point.
electrodes 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 junctionless transitions.
measuring, e. g. pH, conductivity or D.O. concentration.
Measured value The measured value is the special value of a measured parameter to
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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).
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Lists pH 3210
Molality Molality is the quantity (in Mol) of a dissolved substance in 1000 g
solvent.
ORP voltage The ORP is caused by oxidizing or reducing substances dissolved in
water, if these substances become effective at an electrode surface
(e. g. a gold or platinum surface).
pH value The pH 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
measured parameter) of the electrode is the electrical potential. The
electrical current remains constant.
Reset Restoring the original condition of all settings of a measuring system.
Resolution Smallest difference between two measured values that can be
displayed by a meter.
Slope The slope of a linear calibration function.
Stability control
Function to control the measured value stability.
(AutoRead )
Standard solution The standard solution is a solution where the measured value is
known by definition. It is used to calibrate a measuring system.
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.
Zero point The zero point of a pH combination electrode is the pH value at which
the electromotive force of the pH combination electrode at a specified
temperature is zero. Normally, this is at 25 °C.
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pH 3210 Lists
Index
A
Authorized use . . . . . . . . . . . . . . . . . . . . . . 10
Automatic switch-off . . . . . . . . . . . . . . . . . . 15
AutoRead
pH . . . . . . . . . . . . . . . . . . . . . . . . . 28, 30
B
Battery compartment . . . . . . . . . . . . . . 13, 55
C
Calibration
pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Calibration evaluation
pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Calibration interval . . . . . . . . . . . . . . . . . . . 39
Calibration points
pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
D
Dataset . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Date and time . . . . . . . . . . . . . . . . . . . . . . . 22
Default settings
Measured parameter . . . . . . . . . . . . . . 53
System settings . . . . . . . . . . . . . . . . . . 54
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
E
Energy saving feature . . . . . . . . . . . . . . . . 14
I
Initial commissioning . . . . . . . . . . . . . . 13, 14
Initialize . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Interval
calibration . . . . . . . . . . . . . . . . . . . . . . . 39
K
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
M
Measured value display . . . . . . . . . . . . . . . 17
Measurement accuracy . . . . . . . . . . . . . . . 39
Measurement data memory
Edit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Erase . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Storage locations . . . . . . . . . . . . . . . . . 49
Measurement dataset . . . . . . . . . . . . . . . . 49
Measuring
ORP . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Measuring menu
pH/ORP . . . . . . . . . . . . . . . . . . . . . . . . 32
Menus (navigation) . . . . . . . . . . . . . . . . . . 17
Messages . . . . . . . . . . . . . . . . . . . . . . . . . 18
O
Operational safety . . . . . . . . . . . . . . . . . . . 10
P
pH buffer sets . . . . . . . . . . . . . . . . . . . . . . 34
Precautions . . . . . . . . . . . . . . . . . . . . . . . . . 9
R
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
S
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Saving . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Scope of delivery . . . . . . . . . . . . . . . . . . . . 13
Setting the date . . . . . . . . . . . . . . . . . . . . . 14
Setting the time . . . . . . . . . . . . . . . . . . . . . 14
Single-point calibration
pH . . . . . . . . . . . . . . . . . . . . . . 41, 44, 45
Slope
pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Socket field . . . . . . . . . . . . . . . . . . . . . . . . . 8
Stability control
Automatic . . . . . . . . . . . . . . . . . . . . . . . 26
T
Temperature measurement
pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Three-point calibration
pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Two-point calibration
pH . . . . . . . . . . . . . . . . . . . . . . 41, 44, 46
Z
Zero point of pH combination electrode . . . 34
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Lists pH 3210
68
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Wissenschaftlich-Technische Werkstätten GmbH
Dr.-Karl-Slevogt-Straße 1
D-82362 Weilheim
Germany
Tel: +49 (0) 881 183-0
+49 (0) 881 183-100
Fax: +49 (0) 881 183-420
E-Mail: Info@WTW.com
Internet: http://www.WTW.com
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