wtw Cond 3150i User manual

ba75666edfs01 01/2007
Cond 3150i
Operating manual
Bedienungsanleitung
Mode d’emploi
Instrucciones de operación
Conductivity Pocket Meter Page 3
Leitfähigkeits-Taschenmeßgerät Seite 13
Conductimètres de poche Page 21
Medidor manual de la conductividad Página 29
AR
S/
cm
T
ref25
nLF
0
5
2
30
5
°
C
TP
O

Cond 3150i
2
Note to this
operating manual
This operating manual contains a description of
zall basic functions,
zall instructions for a safe operation, and
zall technical data in a compact form.
A more detailed description with notes for special applications is available as
a pdf document via internet under http://www.WTW.com.
Hinweise zu dieser
Bedienungs-
anleitung
Diese Bedienungsanleitung enthält in kompakter Form
zdie Beschreibung aller Grundfunktionen,
zalle Hinweise für den sicheren Betrieb und
zalle technischen Daten.
Eine ausführlichere Beschreibung mit Hinweisen für besondere Anwendun-
gen ist als pdf-Dokument im Internet unter http://www.WTW.com erhältlich.
Remarque à ce
mode d’emploi
Ce mode d'emploi contient sous forme compacte
zla description de toutes les fonctions de base et
ztoutes les informations assurant un fonctionnement sûr, ainsi que
ztous les données techniques.
Une description plus étendue contenant les informations sur des emplois
spéciaux peut être obtenue sous forme pdf dans l'internet sous http://
www.WTW.com.
Observación
a estas
instrucciones
Este manual de instrucciones incluye la descripción en forma resumida de
ztodas las funciones básicas,
ztodas las observaciones que le garantizan el
zfuncionamiento normal y seguro, asimismo todo las especificaciones y
datos técnicos.
En el internet, bajo http://www.WTW.com encuentra Ud. una descripción
más detallada, en formato pdf, para aplicaciones especiales.
Copyright ©Weilheim 2007, WTW GmbH

Cond 3150i List of contents
3
Cond 3150i - List of contents
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Display and jack field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Switching on the measuring instrument . . . . . . . . . . . . . . . . . . 5
Measuring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Determining/Selecting the cell constant C . . . . . . . . . . . . . . . . 6
Switching on/off the temperature compensation (TC) . . . . . . . 7
Configuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Resetting to default settings . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Safety Cond 3150i
4
Safety
Safety
instructions
The individual chapters of this operating manual use safety instructions such
as that shown below to indicate various hazards or dangers:
Warning
indicates instructions that must be followed precisely in order to avoid the
possibility of slight injuries or damage to the instrument or the environment.
Display and jack field
Display
Jack field
Warning
Only connect measuring cells to the measuring instrument that do not return
any unallowed voltages or currents (> SELV and > current circuit with current
limiting).
Almost all measuring cells - in particular WTW measuring cells - fulfill these
conditions.
Status display indicator
Measured value display
Function and
temperature display
TDS
mg/l
%/K
RCL
Auto
Store
Lin
Time
Baud
Day.Month No.
Ident
Year
S
AutoCal DIN
AutoCal TEC
%
mV/pH
Sal
°
F
mbar
OUpH
8
8.
8
88
8
°
LoBat
Cal
ARng AR
TP
1
m
S/
cm
Sal
cm
1/
C
Tref25 Tref20
nLF
M
cm
1Conductivity measuring cell
1

Cond 3150i Switching on the measuring instrument
5
Switching on the measuring instrument
Measuring
Overview of the measuring modes:
Special functions:
AutoRead
(drift control)
The AutoRead function checks the stability of the measurement signal. Acti-
vate AutoRead with <AR>. The current measured value is frozen. Thus, the
<AR> key can also be used as a "hold function" to freeze measured values.
Press <RUN/ENTER> to start the AutoRead measurement. During the Auto-
Read measurement, AR flashes on the display until a stable measured value
is reached. This can be terminated at any time taking over the current mea-
sured value with <RUN/ENTER>.
AutoRange
measuring range
selection
There are several measuring ranges available for conductivity measure-
ments. If a measuring range is exceeded, AutoRange causes the measuring
instrument to change automatically to the next measuring range. The AutoR-
ange function is permanently switched on (display shows ARng).
Temperature
measurement
The measuring instrument automatically measures the temperature of the
sample with the integrated temperature probe of the conductivity measuring
cell (display shows TP). The measuring instrument automatically recognizes
the type of the temperature probe used. This enables the measuring cells to
be connected with NTC30 or Pt1000.
Reference
temperature, Tref
The reference temperature can be switched between 20 °C and 25 °C. It ap-
pears on the display as Tref20 or Tref25. To switchover the reference tem-
perature, see CONFIGURING.
zPress the <>key.
Display test appears briefly on the display.
Subsequently, the selected cell constants and the temperature compen-
sation that was set up appear for approx. one second one after the other.
The measuring instrument then switches to the measuring mode that
was last selected.
Conductivity
µS/cm
Specific
resistance
McmΩ
depending on
the instrument setting
<M> Salinity
SAL

Determining/Selecting the cell constant C Cond 3150i
6
Determining/Selecting the cell constant C
The cell constant of the conductivity measuring cell can be set to one of the
following values:
z0.475 cm-1
z0.100 cm-1
z0.875 cm-1
Note
The cell constant that should be selected must either be taken from the op-
erating manual of the measuring cell or is printed on the measuring cell.
Procedure for setting up the cell constant:
zPress the <CAL> key repeatedly until the CELL display appears.
zThen press the <RUN/ENTER> key.
zPress the <CAL> key repeatedly until the required cell constant appears
in the lower line of the display.
Selection: 0.475 cm-1; 0.100 cm-1 ; 0.875 cm-1
zSwitch to the measuring mode with <M>.
L
CL
E
5
07
4
25
9
cm
1/
S/cm
Tref25
nLF
ARng

Cond 3150i Switching on/off the temperature compensation (TC)
7
Switching on/off the temperature compensation
(TC)
The basis for calculating the temperature compensation is the selected refer-
ence temperature, Tref 25 or Tref 20. For details of how to select the refer-
ence temperature, see CONFIGURATION.
You can select from the following settings:
zNonlinear temperature compensation (nLF) according to EN 27 888
z
zz
zNo temperature compensation (- - - -)
Note
ips Select the following temperature compensations given in the table according
to the respective test sample:
Application tips
Procedure for switching temperature compensation on/off:
Sample Temperature compensation Display
indicator
Natural water (ground
water, surface water and
drinking water)
nLF
according to DIN 38404
EN 27 888
Ultrapure water nLF
according to DIN 38404
EN 27 888
Other aqueous solutions Measure without temperature
compensation
- - - -
Salinity
(seawater)
Automatically nLF according to
IOT
Sal,
zPress the <CAL> key repeatedly until tc appears on the display.
zThen press the <RUN/ENTER> key.
zSwitch the temperature compensation on/off with the <CAL> key.
Selection: Nonlinear temperature compensation (nLF), no temperature
compensation (- - - -).
zSwitch to the measuring mode with <M>.
c
t
F
L
n
38
2
S/cm
Tref25
nLF
ARng

Configuring Cond 3150i
8
Configuring
Note
You can leave the configuration menu at any time with <M> . The parameters
that have already been changed are stored.
Procedure for configuring (factory settings appear in bold typeface):
Resetting to default settings
Basic
settings
The following settings are reset to the delivery status when a reset is per-
formed (initialized):
Reset procedure:
zSwitch off the measuring instrument.
zWhile pressing the <M> key, press <>.
zSwitch over the reference temperature of the conductivity with <CAL>.
Selection: 25 °C (Tref25) and 20 °C (Tref20).
zThen press the <RUN/ENTER> key.
zSwitch over the measurement value display with <CAL>.
Selection: Conductivity (S/cm) or specific resistance (MΩ⋅cm).
zPress the <RUN/ENTER> key. The instrument changes to the measur-
ing mode.
Tref25
25
t
d
n
o
C
cm
S/
Measuring mode
Cell constant 0.475 cm-1
Temperature compensation Nonlinear (nLF)
Reference temperature 25 °C (Tref25)
zPress <CAL> while pressing the <RUN/ENTER> key.
zPress <RUN/ENTER> to reset the measurement parameters. The instru-
ment changes to the measuring mode.
I
n
I

Cond 3150i Technical data
9
Technical data
Dimensions
and weight
Mechanical
structure
Electrical
safety
Test certificates
Ambient
conditions
Measuring ranges
Length [mm] 172
Width [mm] 80
Height [mm] 37
Weight [kg] approx. 0.3
Type of protection IP 66
Protective class III
cETLus, CE
Storage - 25 °C ... + 65 °C
Operation -10 °C ... + 55 °C
Climatic class 2
[µS/cm]
[mS/cm]
0.000 ... 19.99
(only for cell constant = 0.100 cm-1)
0.0 ... 199.9
0 ... 1999
0.00 ... 19.99
0.0 ... 199.9
0 ... 500
Spec. resistance
[MΩ*cm]
0.00 ... 19.99
0.0 ... 199.9
0 ... 1999
SAL 0.0 ... 70.0 according to the IOT table
T [°C] −5.0 ... + 105.0

Technical data Cond 3150i
10
Accuracy
(± 1 digit)
Seleting the cell
constant:
Reference
temperature
Power
supply
No compensation:
Accuracy ± 0.5 %
Nonlinear compensation
Accuracy Sample temperature
± 0.5 % 0 °C ... 35 °C
according to EN 27 888;
± 0.5 % 35 °C ... 50 °C
extended nLF function
according to
WTW measurements
SAL Range 0.0 ... 42.0
Accuracy Sample temperature
± 0.1 5 °C ... 25 °C
± 0.2 25 °C ... 30 °C
T [°C] NTC 30:
Accuracy ± 0.1
PT 1000:
Accuracy Operating temperature
± 0.5 0 °C ... 15 °C
± 0.1 15 °C ... 35 °C
± 1 35 °C ... 55 °C
C [cm-1] 0.100 fixed
0.475
0.875
Tref Can be set to 20 °C or 25 °C
Batteries 4 x 1.5 V alkali-manganese batteries, Type AA
Operational life approx. 3000 operating hours