Wtw LR 325/01 Bedienungsanleitung

OPERATING MANUAL

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LR 325/01

ULTRAPURE WATER CONDUCTIVITY CELL

OPERATING MANUAL

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LR 325/01

Printed in Germany.

LR 325/01 Contents

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LR 325/01 - Contents

1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.1 Structure and function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.2 Recommended fields of application . . . . . . . . . . . . . . . . . . . . . 4

2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Overview LR 325/01

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1Overview

1.1 Structure and function

Structure

1.2 Recommended fields of application

Measurments in ultapure water.

2 Cleaning

Caution

Before cleaning, disconnect the sensor from the instrument.

Cleaning A thorough cleaning is particularly recommended for measurements of low

conductivities.

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

media (e.g. strong acids and lyes, organic solvents) or too high temperatures

shorten the operational lifetime considerably or damage the measuring cell.

The warranty does not cover cases where such conditions cause failure or

mechanical damage.

1Shaft

2Connection head

Contamination Cleaning procedure

Lime sediments Immerse in acetic acid for 5 minutes (volume

share = 10 %)

Fat/oil Clean with warm water that contains

washing-up liquid

LR 325/01 What to do if...

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

3 What to do if...

Error symptom Cause Remedy

No temperature or con-

ductivity display

– No connection between

measuring instrument and sensor

– Cable defective

– Check connection between

measuring instrument and sensor

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

– Observe the application range

– Clean the sensor (see section 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 sensor

Technical data LR 325/01

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4 Technical data

General features Measuring principle Two-electrode measurement

Cell constant 0.100 cm-1 ±2 %

Temperature sensor integrated NTC 30 (30 kΩ/ 25 °C)

Dimensions

(in mm)

Weight approx. 135 g

Materials Shaft Epoxy

Connection head POM

Conductivity electrodes Stainless steel 1.4571

Thermistor enclosure Stainless steel 1.4571

Connection cable Lengths 1,5 m

Diameter 6 mm

Smallest allowed

bend radius

Permanent bend: 80 mm

Single time or short time bend: 50 mm

Plug type Socket, 8 pins

Pressure

resistance

Sensor with closed plug

connection

IP 68 (2 x 105Pa or 2 bar)

Cable plug IP 67 (when plugged in)

The LR 325/01 meets the requirements according to article 3(3) of the 97/

23/EC directive ("Pressure equipment directive").

120.0

165

12.0 17.5

LR 325/01 Technical data

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Pin assignment

Measurement

conditions

Conductivity measuring

range

0.001 µS/cm ... 200 µS/cm

The measuring range may be limited by the

meter that is used (see measuring range of

your meter).

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

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

Minumum depth of immer-

sion

30 mm

Maximum depth of immer-

sion

Entire sensor+cable (up to 80 °C)

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

Operating position any

Storage

conditions

Recommended storing

method

in air

Storage temperature 0 ... 50 °C

Characteristic data

on delivery

Temperature responding

behavior

t99 (99 % of the final value after) < 20 s

Precision of the temperature

sensor

±0.2K

NTC

Shield

not used

Plug from the front: 4

NTC

30 k

Outer electrode

Inner electrode

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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