Wtw TetraCon 325 Manuel utilisateur

TetraCon 325

TetraCon 325/C

ba55301e04 01/2009 9

Operating manual

Standard conductivity measuring cell

Printed in Germany.

TetraCon 325 / TetraCon 325/C Contents

Contents

ba55301e04 01/2009

1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.1 Structure and function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.2 Recommended fields of application . . . . . . . . . . . . . . . . . . . . . 12

2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Overview TetraCon 325 / TetraCon 325/C

12 ba55301e04 01/2009

1Overview

1.1 Structure and function

Structure

1.2 Recommended fields of application

zOn site measurements in rivers, lakes and wastewater

zFish farming

zGround water measurements

zApplications in water laboratories

The TetraCon 325/C is especially suitable for higher chemical loads,

particularly acidic media.

1Voltage electrode (inside, 2x)

2Current electrode (ring, 2x)

3Temperature sensor in graphite enclosure

4Shaft

5Closing head

41, 2 3 5

TetraCon 325 / TetraCon 325/C Cleaning

ba55301e04 01/2009

2 Cleaning

CAUTION

To clean the sensor, disconnect it from the instrument.

Outside cleaning We recommend to clean the sensor thoroughly, especially before measuring

low conductivity values.

After cleaning, thoroughly rinse with deionized water and recalibrate if

necessary.

Aging of the

conductivity

measuring cell

Normally, the conductivity measuring cell does not age. Special measuring

mediums (e.g. strong acids and bases, organic solvents) or temperatures

that are too high may considerably reduce its lifetime or lead to damage. The

warranty does not cover cases where such conditions cause failure or

mechanical damage.

Disposal We recommend to dispose of the measuring cell as electronic waste.

3 What to do if...

Contamination Cleaning procedure

Lime sediments Immerse in acetic acid for 5 minutes (volume

share = 10 %)

Fat/oil Clean with warm water containing washing-

up liquid

Error symptom Cause Remedy

No temperature or

conductivity display

– No connection between

measuring instrument and

conductivity measuring cell

– Cable defective

– Connection between measuring

instrument and conductivity

measuring cell

Measurement delivers

implausible conductivity

values

– Incorrect cell constant adjusted at

the measuring instrument

– Measuring range exceeded

– Contamination in the area of the

electrodes

– Electrodes damaged

– Check / correct the cell constant

– Make sure the correct sensor is

being used for the application

– Clean the conductivity measuring

cell (see chapter 2).

– Return the sensor

Incorrect temperature

display

– The temperature sensor was not

immersed deep enough in the

measuring solution

– Temperature sensor defective

– Observe the minimum immersion

depth

– Return the conductivity measuring

cell

Technical data TetraCon 325 / TetraCon 325/C

14 ba55301e04 01/2009

4 Technical data

General features Measuring principle Four-electrodes measurement

Cell constant 0.475 cm-1 ±1.5 %

Temperature sensor integrated NTC 30 (30 k:at 25 °C / 77 °F)

Dimensions

(in mm)

Weight approx. 135 g

Materials Shaft Epoxy

Connection head TetraCon 325: POM

TetraCon 325/C: PEEK

Conductivity electrodes Graphite

Thermistor enclosure Graphite

Connection cable Lengths TetraCon 325: 1.5 / 3 / 6 / 10 / 15 / 20 m

TetraCon 325/C: 1.5 m

Diameter 6 mm

Smallest allowed

bend radius

fixed installation: 50 mm

flexible use: 80 mm

Plug type Socket, 8 pins

Pressure

resistance Sensor with connection

cable

IP 68 (2 x 105Pa or 2 bar)

Cable plug IP 67 (when plugged in)

The TetraCon 325 / TetraCon 325/C meets the requirements according to

article 3(3) of the directive, 97/23/EC ("pressure equipment directive").

162.5

15.3 21.7 17.5

120.0

TetraCon 325 / TetraCon 325/C Technical data

ba55301e04 01/2009

Pin assignment

Measurement

conditions Conductivity measuring

range

1 PS/cm ... 2 S/cm

Temperature range -5 ... 80 °C (100 °C)

23 ... 176 °F (212 °F)

Max. allowed overpressure 2 x 105Pa (2 bar)

Minimum depth of

immersion

36 mm

Maximum depth of

immersion

(at temperature)

Whole sensor + cable up to 80 °C (176 °F)

Sensor shaft only (=120 mm) up to 100 °C

(212 °F)

Operating position Any

Storage

conditions Recommended storing

method

In air

Storage temperature 0 ... 50 °C (32 ... 122 °F)

Characteristic data

on delivery Temperature responding

behavior

t99 (99 % of the final value display after)

<20s

Precision of the temperature

sensor

± 0.2 K

NTC

30 kW

Voltage electrode 2

Current electrode 1

Voltage electrode 1

NTC

Current electrode 2

Shield

not used

Plug from the front: 4

Technical data TetraCon 325 / TetraCon 325/C

16 ba55301e04 01/2009

What can Xylem do for you?

We're a global team unified in a common purpose: creating innovative solutions to

meet our world's water needs. Developing new technologies that will improve the way

water is used, conserved, and re-used in the future is central to our work. We move,

treat, analyze, and return water to the environment, and we help people use water

efficiently, in their homes, buildings, factories and farms. In more than 150 countries, we

have strong, long-standing relationships with customers who know us for our powerful

combination of leading product brands and applications expertise, backed by a legacy

of innovation.

Xylem Analytics Germany GmbH

Dr.-Karl-Slevogt-Str. 1

82362 Weilheim

Germany

Xylem Analytics Germany

Sales GmbH & Co. KG

WTW

Dr.-Karl-Slevogt-Str. 1

82362 Weilheim

Germany

Tel.:

Fax:

E-Mail

Internet:

+49 881 183-325

+49 881 183-414

wtw[email protected]

www.WTW.com

Service address:

For more information on how Xylem can help you, go to xyleminc.com.

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