Cond 3110
0
5
2
0
3
5
C
°
S/cm
m
nLF
TP
AR
ARng
Operating manual
ba75792e02 11/2008
Conductivity meter
Cond 3110
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.
ba75792e02 11/2008
Cond 3110 Contents
Cond 3110 - 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
4 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1 General operating principles . . . . . . . . . . . . . . . . . . . . . . 15
4.1.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1.2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.2.1 Measuring the conductivity. . . . . . . . . . . . . . . . . 17
4.2.2 Measuring the salinity . . . . . . . . . . . . . . . . . . . . 17
4.3 Determining/setting up the cell constant [C] . . . . . . . . . . 19
4.3.1 Determining the cell constant (calibration). . . . . 19
4.3.2 Using the last calibrated cell constant . . . . . . . . 21
4.3.3 Setting the cell constant manually . . . . . . . . . . . 22
4.4 Temperature compensation TC . . . . . . . . . . . . . . . . . . . 25
4.5 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.5.1 System settings . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.5.2 Measurement settings . . . . . . . . . . . . . . . . . . . . 27
4.6 Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.6.1 Resetting the cell constant. . . . . . . . . . . . . . . . . 29
4.6.2 Resetting all meter settings . . . . . . . . . . . . . . . . 30
5 Maintenance, cleaning, disposal. . . . . . . . . . . . . . . . . 31
5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.1.1 Replacing the batteries . . . . . . . . . . . . . . . . . . . 31
5.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.3 Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
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3
Contents Cond 3110
6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
7.1 General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
7.2 Measuring ranges, resolution, accuracy . . . . . . . . . . . . . 35
8 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4
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Cond 3110 Overview
1
2
3
0
5
2
0
3
5
C
°
S/cm
m
nLF
TP
AR
ARng
1Overview
The Cond 3110 compact precision conductivity meter enables you to
perform conductivity measurements quickly and reliably. The
Cond 3110 provides the maximum degree of operating comfort,
reliability and measuring certainty for all applications.
The proven procedures for determining or adjusting the cell constant
support your work with the conductivity meter.
1 Keypad
2 Display
3 Socket field
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5
Overview Cond 3110
Cond 3110
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
_>).
<On/Off>:
<On/Off
<M>:
<M
<CAL>:
<CAL
<▲>: Increments values, scrolls
<▼>: Decrements values, scrolls
<ENTER>:
<ENTER
_>:
_>:
_>:
_>:
Switches the meter on/off
Resets calibration data
Selects the measured parameter
Opens the setting menu for
calibration and measurements
Calls up the calibration procedure
Displays the calibration data
Confirms entries
Opens the setting menu for system
settings
6
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Cond 3110 Overview
Time
1/cm
/K
%
8
88
8
8
8
8
8
°F
C
°
Sal
S/cm
m
LoBat
Tref25
Tref20
ARng
CalnLF AR
TP
-
µ
Measured
parameter
Sensor symbol
(calibration
evaluation)
Measured value
display
Temperature
display, function
display indicators,
status display
indicators
1.2 Display
Status display
indicators
AR Stability control (AutoRead) is active
ARng Automatic range switching; meter measures with
highest possible resolution
Cal Calibration
LoBat With battery operation: batteries almost empty
nLF Nonlinear temperature compensation
TP Temperature measurement active
Tref20 Reference temperature of 20 °C
TRef25 Reference temperature of 25 °C
TIME Setting of calibration interval
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7
Overview Cond 3110
2
1
1.3 Socket field
Connectors:
1 Conductivity measuring cell
2 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 measuring cells fulfill these conditions.
8
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Cond 3110 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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9
Safety Cond 3110
2.1 Authorized use
Authorized use of the meter consists exclusively of the measurement
of conductivity, temperature and salinity 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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Cond 3110 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 Cond 3110
12
ba75792e02 11/2008
Cond 3110 Commissioning
2
1
3 Commissioning
3.1 Scope of delivery
z Conductivity meter Cond 3110
z 4 batteries 1.5 V Mignon type AA
z Operating manual
3.2 Initial commissioning
Perform the following activities:
z Insert the supplied batteries
z Switch on the meter.
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.
3 Place four batteries (type Mignon AA) in the battery
compartment.
ba75792e02 11/2008
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.
13
Commissioning Cond 3110
Caution
Make sure that the poles of the batteries are the right way round.
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 Place the meter on a flat surface and protect it from intense
light and heat.
2 Press the <On/Off>
key.
A display test is briefly displayed.
Subsequently, the meter switches to the measuring mode
(measured value display).
Note
The meter has an energy saving feature to avoid unnecessary battery
depletion during battery operation.
The energy saving feature switches off the meter if no key was pressed
during the specified interval (setting the switch-off interval see section
4.5.1).
14
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Cond 3110 Operation
4 Operation
4.1 General operating principles
This section contains basic information on the operation of the
Cond 3110.
4.1.1 Operating modes
The meter has the following operating modes:
z Measurement
The display indicates the measurement data in the measured value
display
z Calibration
The display guides you through a calibration procedure with
calibration information
z Configuration
The system menu or a sensor menu with submenus, settings and
functions is displayed
4.1.2 Operation
Keys The meter is operated via keys. The keys can have different functions
with long or short keystrokes.
Functions Generally, with a short keystroke a function is carried out. A long
keystroke opens a setting menu.
In a setting menu, settings are selected with the <▲><▼> keys.
A setting is confirmed with <ENTER>. With confirming, the setting is
finished and the next setting is displayed.
Representation 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
_>).
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15
Operation Cond 3110
4.2 Measuring
Preparatory activities Perform the following preparatory activities when you want to measure:
1 Connect a measuring cell to the meter.
2 Adjust the temperature of the test solutions and measure the
current temperature if the measurement is made without a
temperature sensor.
3 Calibrate or check the meter with the measuring cell.
4 Select the measured parameter with <M>.
Stability control
AutoRead
During the measuring procedure, the stability control function is
automatically activated. The stability control function (AR) checks the
stability of the measured conductivity signal and the stability of the
measured temperature signal. The stability has a considerable effect
on the reproducibility of the measured value.
For identical measurement conditions, the following applies:
Measured
Reproducibility Response time
parameter
Conductivity better than 0.5% of measured
> 10 seconds
value
Temperature < 0.3 °C of temperature value > 15 seconds
Temperature sensor The temperature measurement is absolutely essential for a
reproducible conductivity measurement. If a temperature sensor is
integrated in the sensor, it is indicated on the display by TP.
Note
The conductivity meter automatically recognizes the type of the
temperature sensor used. Therefore, you can connect measuring cells
with an NTC30 or Pt1000.
16
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Cond 3110 Operation
0
5
2
0
3
5
C
°
S/cm
m
nLF
TP
Tref25
AR
ARng
4.2.1 Measuring the conductivity
1 Perform the preparatory activities according to section 4.2.
2 Immerse the conductivity measuring cell in the test sample.
3 If necessary, scroll with <M> until the measured parameter
with the unit mS/cm or µS/cm is displayed.
4 Wait for a stable measured value.
The AR display indicator flashes as long as the measured
value is not yet stable.
4.2.2 Measuring the salinity
1 Perform the preparatory activities according to section 4.2.
2 Immerse the conductivity measuring cell in the test sample.
3 Using <M>, scroll as necessary until the measured parameter
Sal is displayed.
4 Wait for a stable measured value.
The AR display indicator flashes as long as the measured
value is not yet stable.
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17
Operation Cond 3110
2
1
2
3
2
3
C
°
Sal
nLF
TP
AR
ARng
18
ba75792e02 11/2008
Cond 3110 Operation
L
CL
E
L
A
C
4.3 Determining/setting up the cell constant [C]
Why determine/set up
the cell constant?
Cleaning interval (Int.C) After the adjusted cleaning interval has expired the sensor symbol
Due to aging, the cell constant slightly changes. As a result, an inexact
measured value is displayed. Calibration determines the current value
of the cell constant and stores this value in the meter.
Thus, you should calibrate at regular intervals.
You can either determine the cell constant of the conductivity
measuring cell in the range 0.450 ... 0.500 cm
by calibration in the control standard 0.01 mol/l KCl, or adjust it
manually in the range 0.800 ... 0.880 cm
Besides, the fixed cell constant 0.475 cm
flashes and thus reminds you to clean the measuring cell. It is still
possible to measure.
The cleaning interval (Int.C) is set to 180 days (d180) in the factory. You
can change the interval (see section 4.5.2).
Note
In order to maintain the high measurement accuracy of the measuring
system, clean the measuring cell and recalibrate after the cleaning
interval has expired.
-1
or 0.800 ... 0.880 cm
-1
.
-1
can be selected.
-1
Determining the cell
constant
(calibration in control
standard)
4.3.1 Determining the cell constant (calibration)
1 Press <CAL> repeatedly until CAL CELL is displayed.
2 Press <ENTER> or <CAL_> to confirm the selection of CAL
CELL.
The cell constant of the last calibration is displayed.
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19
Operation Cond 3110
1/cm
8
03
8
L
A
C
Tref25
Cal
1/cm
4
03
8
C
Tref25
Cal
3 Immerse the measuring cell in the control standard solution,
0.01 mol/l KCI.
4 Start the calibration with <ENTER>. The determination of the
cell constant with stability control starts. The display
indicator flashes until there is a stable signal.
The cell constant determined is displayed. The meter
automatically stores the cell constant.
Stability control During calibration, the stability control is automatically activated.
20
5 Switch to the measuring mode with <ENTER>.
The determined cell constant is used.
Note
If the error message E3 appears, refer to chapter 6 W
Note
This method of automatically determining the cell constant by
calibration in the 0.01 mol/l KCL control standard solution can only be
used for measuring cells with cell constants in the range 0.450 ...
0.500 cm
-1
or 0.800 ... 0.880 cm-1.
HAT TO DO IF...
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Cond 3110 Operation
L
CL
E
E
S
U
Calibration evaluation After the calibration, the meter automatically evaluates the current
status. The evaluation appears on the display.
Downloading calibration
data
Display Cell constant [cm
in the range
0.450 ... 0.500 cm
0.800 ... 0.880 cm
You are working with a
correctly calibrated measuring
cell.
E3
Eliminate the error according to
chapter 6 W
You can download the calibration data.
1 Press <CAL_> to display the calibration data.
HAT TO DO IF...
The calibrated cell constant is displayed.
outside the ranges
0.450 ... 0.500 cm
or
0.800 ... 0.880 cm
-1
]
-1
-1
-1
-1
4.3.2 Using the last calibrated cell constant
Precondition A valid calibration must be available (see section 4.3.1).
1 Press <CAL> repeatedly until USE CELL is displayed.
2 Press <ENTER> or <CAL_> to confirm the selection of USE
CELL.
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21
Operation Cond 3110
1/cm
8
03
8
L
A
C
Tref25
Cal
L
CL
E
E
S
U
3 If necessary, press <CAL> repeatedly until CAL and the last
calibrated cell constant is displayed.
4 Confirm the selection with <ENTER>.
The displayed cell constant is used.
The meter switches to the measured value display.
Range
0.800 ... 0.880 cm
4.3.3 Setting the cell constant manually
Note
The cell constant to be set must either be taken from the operating
manual of the measuring cell or is printed on the measuring cell.
-1
1 Press <CAL> repeatedly until USE CELL is displayed.
2 Confirm the selection with <ENTER> or <CAL_>.
The cell constant that was set last is displayed.
22
3 If necessary, press <CAL> repeatedly until a cell constant in
the range 0.800 ... 0.880 cm
-1
is displayed.
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Cond 3110 Operation
1/cm
7
03
8
8
2
4
S/cm
µ
Tref25
ARng
nLF
1
1/cm
8
03
8
1
8
4
S/cm
µ
Tref25
ARng
nLF
1
4 Set the cell constant to be used with <▲><▼>, e.g. 0.837 cm-1.
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5 Confirm the selection with <ENTER>.
The new cell constant is used from now on.
The meter switches to the measured value display.
23
Operation Cond 3110
L
CL
E
E
S
U
1/cm
5
07
4
8
7
6
S/cm
µ
Tref25
ARng
nLF
Selecting the cell
constant
0.475 cm
-1
1 Press the <CAL> key repeatedly until USE CELL is displayed.
2 Confirm the selection with <ENTER> or <CAL_>.
3 If necessary, press <CAL> repeatedly until the cell constant
0.475 cm
-1
is displayed.
24
4 Confirm the selection with <ENTER>.
The meter switches to the measured value display.
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Cond 3110 Operation
4.4 Temperature compensation TC
The calculation of the temperature compensation is based on the
preset reference temperature, Tref 20 or Tref 25 (see section
4.5 S
ETTINGS).
As the temperature compensation, the nonlinear temperature
compensation "nLF" according to DIN 38404 or EN 27 888 respectively
is permanently set.
Application ranges Test sample Temperature compensation TC Display
indicator
Natural water
(ground water,
surface water,
nLF
according to DIN 38404
EN 27 888
drinking water)
Ultrapure water nLF
according to DIN 38404
EN 27 888
Salinity
(seawater)
Automatically nLF according to
IOT
Sal,
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25
Operation Cond 3110
0
00
1
f
f
O
Time
4.5 Settings
You can adapt the meter to your individual requirements. The settings
are done in the following menus:
z System settings (<ENTER
– Switch-off interval (tOff)
z Measurement settings (<M
– Reference temperature (Tref25 or Tref20)
– Temperature unit (°C / °F)
– Cleaning interval (Int.C [0 ... 999])
Note
You can exit the setting menu at any time by pressing <M>. Settings
already modified and confirmed with <ENTER> are stored.
4.5.1 System settings
The default setting is printed in bold.
Switch-off interval (.OFF) 10, 20, 30, 40, 50 min,
_>)
_>)
1, 2, 3, 4, 5, 10, 15, 20, 24 h
Switch-off interval
(.OFF)
1 Open the menu for system settings with <ENTER_>.
The first system setting is displayed.
2 Set the switch-off interval with <▲><▼>.
3 Confirm with <ENTER>.
The system settings are completed.
The meter switches to the measuring mode.
26
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Cond 3110 Operation
5
2
T
Tref25
C
o
i
n
U
°
C
4.5.2 Measurement settings
These settings apply to the determination of the cell constant and
measurement (the default condition is printed in bold).
Reference temperature t25, t20
Temperature unit (UnI) °C, °F
Cleaning interval (Int.C) 0 ... 180 ... 999 d
Reference temperature
1 Open the menu for measurement settings with <M_>.
t25, the adjusted reference temperature is displayed.
Temperature unit (Uni)
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2 Select the reference temperature with <▲><▼>.
3 Confirm with <ENTER>.
Uni, the setting of the unit of the temperature value is
displayed.
27
Operation Cond 3110
0
8
d
C
T
N
I
Time
1
4 Using <▲><▼>, toggle between °C and °F.
5 Confirm with <ENTER>.
Int.C, the setting of the cleaning interval is displayed.
Cleaning interval (Int.C)
6 Set the interval with <▲><▼>.
7 Confirm with <ENTER>.
The measurement settings are completed.
The meter switches to the measuring mode.
28
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Cond 3110 Operation
o
n
C
i
pH
n
I
Cal
4.6 Reset
4.6.1 Resetting the cell constant
This function serves to erase the last determined cell constant.
Subsequently, the meter uses the last manually set cell constant in the
range 0.800 ... 0.880 cm
Based on the last erased cell constant the meter decides to which of
the two manually set cell constants the cell constant is reset.
If the erased cell constant was in the calibration range 0.450 ...
0.500 cm
If the erased cell constant was in the calibration range 0.800 ...
0.880 cm
0.880 cm
All other meter settings are retained.
Note
The measuring system is possibly not calibrated after a reset. Before
measuring, make sure the meter uses the cell constant suitable for the
measuring cell.
-1
, the fixed cell constant 0.475 cm-1 is used.
-1
, the adjusted cell constant from the range 0.800 ...
-1
is used.
-1
or the fixed cell constant, 0.475 cm-1.
Resetting the cell
constant
1 Press <On/Off_> to open the menu for the reset of the cell
constant.
Ini.C is displayed.
2 Press <▲><▼> to display no or YES.
YES: Reset the cell constant.
no: Retain the cell constant.
3 Confirm with <ENTER>.
The menu is finished.
The meter switches to the measuring mode.
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29
Operation Cond 3110
o
n
t
i
n
I
4.6.2 Resetting all meter settings
This function resets all meter settings to the default condition. The
relevant values are given in the following sections:
System settings section 4.5.1
Measurement settings section 4.5.2
The following settings are also reset to the default condition:
Setting Default settings
Measured parameter mS/cm or µS/cm
Adjusted cell constant 0.840 1/cm
Resetting the meter
settings
1 Switch on the meter with <On/Off>.
The display test appears briefly on the display.
2 During the display test, press <M> to open the menu for the
reset of the meter settings.
Init is displayed.
3 Press <▲><▼> to display no or YES.
YES: Reset the meter settings.
no: Retain the meter settings.
30
4 Confirm with <ENTER>.
The menu is finished.
The meter switches to the measuring mode.
Note
The measuring system is possibly not calibrated after a reset. Before
measuring, make sure the meter uses the cell constant suitable for the
measuring cell.
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Cond 3110 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 measuring cells 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.
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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.
31
Maintenance, cleaning, disposal Cond 3110
Caution
Make sure that the poles of the batteries are the right way round.
The
± signs on the batteries must correspond to the ± signs in the
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.
32
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Cond 3110 What to do if...
6 What to do if...
Error message
OFL, UFL
Error message,
E3
Sensor symbol flashes
Display,
LoBat
Cause Remedy
– Measured value outside the
– Use suitable measuring cell
measuring range
Cause Remedy
– Measuring cell contaminated – Clean cell and replace it if
necessary
– Calibration solution not suitable – Check calibration solutions
Cause Remedy
– Cleaning interval expired – Recalibrate the measuring
system
Cause Remedy
– Batteries almost empty – Replace the batteries (see
section 5.1 M
AINTENANCE)
Meter does not react to
keystroke
You want to know which
software version is in
the meter
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Cause Remedy
– Operating condition undefined
or EMC load unallowed
– Processor reset:
Press the <ENTER> and
<On/Off>
simultaneously
Cause Remedy
– E. g., a question by the service
department
– Switch on the meter.
During the display test,
display the software version
with <ENTER>.
key
33
What to do if... Cond 3110
34
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Cond 3110 Technical data
7 Technical data
7.1 General data
Dimensions approx. 240 x 190 x 80 mm
Weight approx. 0.4 kg
Mechanical structure Type of protection IP 67
Electrical safety Protective class III
Test certificates CE
Ambient
conditions
Power
supply
Guidelines
and norms used
Storage - 25 °C ... + 65 °C
Operation -10 °C ... + 55 °C
Climatic class 2
Batteries 4 x 1.5 V alkali-manganese batteries,
type AA
Rechargeable
batteries
Operational life Approx. 1000 h operating hours (batteries)
EMC EC directive 2004/108/EC
meter safety EC directive 2006/95/EC
Climatic class VDI/VDE 3540
IP protection EN 60529
4 x 1,2 V NiMH rechargeable batteries,
type AA
(no charging function)
EN 61326-1
EN 61000-3-2
EN 61000-3-3
FCC Class A
EN 61010-1
Measuring ranges,
resolution
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7.2 Measuring ranges, resolution, accuracy
Variable Measuring range Resolution
[µS/cm] 0.0 ... 199.9
200 ... 1999
[mS/cm] 2.00 ... 19.99
20.0 ... 199.9
200 ... 1000
0.1
1
0.01
0.1
1
35
Technical data Cond 3110
Measuring ranges,
resolution
Variable Measuring range Resolution
SAL 0.0 ... 70.0
T [°C] − 5.0 ... + 105.0 0.1
T [°F] + 23.0 ... + 221.0 0.1
Cell constants Cell constant C Values
Can be calibrated in
the ranges
Adjustable 0.800 ... 0.880 cm
Reference temperature Reference
temperature
Adjustable 20 °C (Tref20)
according to the IOT
table
0.450 ... 0.500 cm
0.800 ... 0.880 cm
0.475 cm
-1
(fixed)
-1
-1
-1
Values
25 °C (Tref25)
0.1
Accuracy (± 1 digit) Variable Accuracy Temperature of the test
sample
/ Temperature compensation
Nonlinear (nLF) ± 0.5 % 0 °C ... + 35 °C
according to EN 27 888
± 0.5 % + 35 °C ... + 50 °C
enhanced nLF function
SAL / range
0.0 ... 70.0 ± 0.1 + 5 °C ... + 25 °C
± 0.2 + 25 °C ... + 30 °C
T [°C] / temperature sensor
NTC 30 ± 0.1
PT 1000 ± 0.1
Note
The accuracy values specified here apply exclusively to the meter. The
accuracy of the measuring cell has also to be taken into account.
36
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Cond 3110 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 helps 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.
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).
Cell constant, k 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.
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
solvent.
Reference
temperature
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Fixed temperature value to compare temperature-dependent
measured values. For conductivity measurements, the measured
value is converted to a conductivity value at a reference temperature
of 20 °C or 25 °C.
37
Lists Cond 3110
α
T
Ref
=
Meas
*
1
1+
a
(T - )
*
T
Ref
Reset Restoring the original condition of all settings of a measuring system.
Resistance Short name for the specific electrolytic resistance. It corresponds to
the reciprocal value of the electrical conductivity.
Resolution Smallest difference between two measured values that can be
displayed by a measuring instrument.
Salinity The absolute salinity S
of seawater corresponds to the relationship
A
of the mass of dissolved salts to the mass of the solution (in g/Kg). In
practice, this dimension cannot be measured directly. Therefore, the
practical 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.
Stability control Function to control the measured value stability.
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
Value of the slope of a linear temperature function.
coefficient
Temperature
compensation
Name of a function that considers the temperature influence on the
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 potentiometric measurements, the slope
value is adjusted to the temperature of the test sample but the
measured value is not converted.
Temperature function Name of a mathematical function expressing the temperature
behavior of a test sample, a probe or part of a probe.
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.
38
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Cond 3110 Lists
Index
A
Authorized use . . . . . . . . . . . . . . . . . . . . . . 10
AutoRead . . . . . . . . . . . . . . . . . . . . . . . . . . 19
B
Battery compartment . . . . . . . . . . . . . . 13, 31
Baud rate setting . . . . . . . . . . . . . . . . . . . . 26
C
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . 19
Calibration evaluation . . . . . . . . . . . . . . . . 21
Cell constant . . . . . . . . . . . . . . . . . . . . . . . 19
Cleaning interval . . . . . . . . . . . . . . . . . . . . 19
D
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
E
Energy saving feature . . . . . . . . . . . . . . . . 14
I
Initial commissioning . . . . . . . . . . . . . . 13, 14
Interval
Calibration . . . . . . . . . . . . . . . . . . . . . . 19
P
Precautions . . . . . . . . . . . . . . . . . . . . . . . . . 9
R
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
All meter settings . . . . . . . . . . . . . . . . . 30
Cell constant . . . . . . . . . . . . . . . . . . . . 29
Resolution setting . . . . . . . . . . . . . . . . . . . 27
S
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Scope of delivery . . . . . . . . . . . . . . . . . . . . 13
Socket field . . . . . . . . . . . . . . . . . . . . . . . . . 8
T
Temperature compensation . . . . . . . . . . . . 25
Nonlinear . . . . . . . . . . . . . . . . . . . . . . . 25
Switch off . . . . . . . . . . . . . . . . . . . . . . . 25
Temperature sensor . . . . . . . . . . . . . . . . . 16
Total dissolved solids . . . . . . . . . . . . . . . . . 19
K
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
L
LoBat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
M
Measurement accuracy . . . . . . . . . . . . . . . 19
N
Nonlinear
Temperature compensation . . . . . . . . . 25
O
Operation location . . . . . . . . . . . . . . . . . . . 14
Operational safety . . . . . . . . . . . . . . . . . . . 10
ORP voltage . . . . . . . . . . . . . . . . . . . . . . . . 17
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39
Lists Cond 3110
40
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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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