Wtw TetraCon 700 Manuel utilisateur

ba55320e05 11/2009

TetraCon 700

Operating manual

Conductivity measuring cell

TetraCon 700

20 ba55320e05 11/2009

Note

The latest version of the present operating manual can be found on the

Internet under www.WTW.com.

Reprinting - even as excerpts - is only allowed with the explicit written

authorization of WTW GmbH, Weilheim.

Printed in Germany.

TetraCon 700 Contents

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TetraCon 700 - Contents

1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

1.1 Structure of the TetraCon 700 conductivity

measuring cell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

1.2 Recommended fields of application . . . . . . . . . . . . . . . . 23

1.3 Variants and identification . . . . . . . . . . . . . . . . . . . . . . . 23

2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

2.1 General information on safety . . . . . . . . . . . . . . . . . . . . 24

2.2 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

2.3 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . 25

3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

3.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

3.2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

3.2.1 Connection to the measuring transmitter . . . . . 27

4 Measuring / Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 28

4.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

4.2 Application-dependent settings . . . . . . . . . . . . . . . . . . . 29

5 Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . 30

5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

5.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

5.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6 What to do if ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7 Replacement parts and accessories . . . . . . . . . . . . . . 32

8 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

8.1 General features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

8.2 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

8.3 Measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . 35

8.4 Characteristic data on delivery . . . . . . . . . . . . . . . . . . . . 35

Overview TetraCon 700

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1 Overview

1.1 Structure of the TetraCon 700 conductivity measuring

cell

Fig. 1-1 Structure of the TetraCon 700 conductivity measuring cell

1Shaft

2 Closing head with protective ring

3 Voltage electrodes

4 Temperature sensor

5 Current electrodes (ring)

Sensor element

TetraCon 700 Overview

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1.2 Recommended fields of application

The TetraCon 700 conductivity measuring cell is suitable for stationary

measurements in water/wastewater applications.

Characteristics The principle of the measurement method enables to avoid influences

from primary or secondary polarization effects, which ensures a high

degree of measuring accuracy.

The modern epoxy casting technique reduces the danger of breaking

the conductivity measuring cell in rough industry use.

1.3 Variants and identification

Instrument

identification The instrument designation is printed on the plug-sided end of the

cable. The series number is engraved in the closing head. Have these

designations ready in case of queries to the WTW service department.

Safety TetraCon 700

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2Safety

2.1 General information on safety

These safety instructions contain all instructions that have to be

followed for a safe operation of the TetraCon 700 conductivity

measuring cell. Before starting any work with the TetraCon 700,

carefully read the safety instructions and strictly follow all protective

measures mentioned.

Always store and make available these safety instructions together with

the operating manual in the vicinity of the place of installation.

General safety

instructions Safety instructions in this operating manual can be recognized by the

warning symbol (triangle) in the left column. The signal word (e.g.

"Caution") indicates the danger level:

Warning

indicates instructions that must be followed precisely in order to

prevent serious dangers to persons.

Caution

indicates instructions that must be followed precisely in order to

avoid slight injuries or damage to the instrument or the

environment.

Other labels

Note

indicates notes that draw your attention to special features.

Note

indicates cross-references to other documents, e.g. operating

manuals.

2.2 Authorized use

Authorized use of the TetraCon 700 consists of stationary conductivity

measurement in the following areas:

zWater and wastewater

zEnvironment

zIndustry.

TetraCon 700 Safety

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Please observe the technical specifications according to chapter 8

TECHNICAL DATA. Only operation according to the instructions given in

this operating manual is considered to be authorized.

Any other use is considered to be unauthorized. Unauthorized use

invalidates any claims with regard to the guarantee.

2.3 General safety instructions

Function and

operational safety The conductivity measuring cell left the factory in a safe and secure

technical condition.

The smooth functioning and operational safety of the conductivity

measuring cell 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 conductivity

measuring cell can only be guaranteed under the environmental

conditions that are specified in chapter 8 TECHNICAL DATA.

The specified temperature (chapter 8 TECHNICAL DATA) must be

maintained during the application and transport of the conductivity

measuring cell. Protect the conductivity measuring cell, particularly

against frost or overheating.

Safety TetraCon 700

26 ba55320e05 11/2009

Safe operation If safe operation is no longer possible, the conductivity measuring cell

must be taken out of operation and secured against inadvertent

operation.

Safe operation is no longer possible if the conductivity measuring cell:

zhas been damaged in transport

zhas been stored under adverse conditions for a lengthy period of

time

zis visibly damaged

zno longer operates as described in this manual.

If you are in any doubt, contact the supplier of your conductivity

measuring cell.

Obligations of the

operator The operator of the conductivity measuring cell must ensure that the

following rules and regulations are followed when dealing with

hazardous substances:

zEC directives for protective labor legislation

zNational protective labor legislation

zSafety regulations

zSafety data sheets of the chemical manufacturer.

Caution

All changes of the TetraCon 700 that exceed the work described

in this operating manual are not allowed. Repair work may only be

carried out by WTW Weilheim.

TetraCon 700 Commissioning

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3 Commissioning

3.1 Scope of delivery

zTetraCon 700

zThe conductivity measuring cell is equipped with protective caps

zOperating manual.

3.2 Installation

3.2.1 Connection to the measuring transmitter

The TetraCon 700 connection cable has a cable plug to be connected

to the Cond input socket of a measuring transmitter. It is connected to

the terminal strip of a measuring transmitter without a Cond input

socket via the ADA/AMPH-LF adapter (see chapter 7 REPLACEMENT

PARTS AND ACCESSORIES).

For detailed information please refer to the operating manual of the

measuring transmitter.

Measuring / Operation TetraCon 700

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4 Measuring / Operation

4.1 Measuring

Warning

Contact with the sample can lead to danger to the user!

Depending on the type of sample, suitable protective measures

must be taken (protective clothing, protective goggles, etc.).

Minimum immersion

depth Please observe the minimum immersion depth of the conductivity

measuring cell (> 30 mm).

Spacing Please make sure that at the electrodes, the conductivity measuring

cell is surrounded by a clearance of at least 5 cm at the base and sides

(boundary fields).

Measuring at a narrow

location If the clearance is less than that, the cell constant changes. This leads

to inexact measurement results. Normally, measuring transmitters

have a correction function that can compensate for this influence. This

procedure determines a new cell constant for the system consisting of

conductivity measuring cell + measuring environment. For more

detailed information, refer to section 4.2 APPLICATION-DEPENDENT

SETTINGS.

Note

Normally, the conductivity measuring cell does not age. Special

measuring media (e.g. strong acids and bases, organic solvents) or

temperatures that are too high may considerably reduce its lifetime or

lead to damage. No warranty claims can be made for mechanical

damage or any failure caused by these types of measuring media.

> 30 mm

TetraCon 700

> 50 mm

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