Wtw Cond 3150i Manual de usuario

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

ref25

nLF

Cond 3150i

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.

Cond 3150i List of contents

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

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

AutoCal DIN

AutoCal TEC

mV/pH

Sal

mbar

OUpH

LoBat

Cal

ARng AR

Sal

Tref25 Tref20

nLF

1Conductivity measuring cell

Cond 3150i Switching on the measuring instrument

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

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>.

S/cm

Tref25

nLF

ARng

Cond 3150i Switching on/off the temperature compensation (TC)

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

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>.

S/cm

Tref25

nLF

ARng

Configuring Cond 3150i

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

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.

Cond 3150i Technical data

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

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

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