Xylem WTW SensoLyt 900 Bedienungsanleitung

OPERATING MANUAL

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SensoLyt®900(-P)

IDS pH ELECTRODE WITH POLYMER ELECTROLYTE

OPERATING MANUAL

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SensoLyt®900(-P)

Printed in Germany.

SensoLyt®900(-P) General information

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1 General information

Automatic sensor

recognition

The sensor electronics with the stored sensor data are in the connecting

head of the electrode. The data include, among other things, the sensor type

and series number. In addition, the calibration data are stored in the sensor

with each calibration and the calibration history is recorded (the last 10 cali-

brations). The data is recalled by the meter when the sensor is connected

and is used for measurement and for measured value documentation.

Storing the calibration data in the sensor ensures that the correct slope and

asymmetry are automatically used if the sensor is operated with different

meters. On the other hand, different calibrated sensors can be used with one

meter without the need to recalibrate.

The digital transmission technique guarantees the failure-free communica-

tion with the meter even with long connection cables. The sensor firmware

can be updated via the meter.

Armoring

A 925-P/K and

A925-P/S

(accessories)

To protect the electrode against mechanical impacts, the A 925-P/K armoring

(with plastic protective hood) or A 925-P/S (with steel protective hood) can be

installed and uninstalled as necessary. The steel model is simultaneously

used as a sinker for depth measurements.

Commissioning, measuring, calibration SensoLyt®900(-P)

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2 Commissioning, measuring, calibration

2.1 Opening and closing the IDS plug connection

This section only applies to IDS plug variants (SenTix®... -P).

Opening the plug

connection

If necessary, clean the plug connection

Open the locking device (step 1)

Use your thumb and index finger to press the clips of the connector

together, and pull the connector out of the plug (step 2).

Closing the plug

connection

Make sure that the plug connection is completely dry and clean.

Align the guidance of the connector with the groove in the plug and insert

the connector in the unlocked plug until it catches (step 3).

Close the locking device (step 4).

Plug connection

closed and locked

Guidance

Groove

SensoLyt®900(-P) Commissioning, measuring, calibration

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2.2 Commissioning

Scope of delivery ORP electrode SensoLyt®900(-P)

Operating manual

Commissioning Prepare the electrode for measuring as follows:

Remove the watering cap from the electrode tip. Possible salt deposits in

the area of the watering cap do not affect the measuring characteristics

and can easily be removed with deionized water.

Connect the electrode to a free IDS sensor plug-in position of the multi

parameter probe or to an IDS connection of the meter.

To open and close the IDS plug-in position please note the Abschnitt 2.1

OPENING AND CLOSING THE IDS PLUG CONNECTION.

Calibrate the electrode according to the operating manual of the meter

and observe the rules in the following section while doing so:

Preparing the

sensor for

measurement

2.3 Calibration and measurement: General rules

Avoid the carryover of any solution (sample or buffer solution) from one

Please keep the watering cap. It is required for the electrode to

be stored. Always keep the watering cap clean.

Connection cables in different lengths to connect the electrode to

the meter are listed in Abschnitt 7 WEAR PARTS AND ACCESSORIES.

SensoLyt®900 Connect the sensor to the meter.

The sensor is immediately ready to measure.

SensoLyt®900-P Connect the sensor to a free IDS sensor plug-in

position of the multi parameter probe or to an IDS

connection of the meter. To open and close the

IDS plug-in position please note the Abschnitt 2.1

OPENING AND CLOSING THE IDS PLUG CONNECTION.

The sensor is immediately ready to measure.

Connection cables in different lengths to connect

the SensoLyt®900-P sensor to the meter are listed

in Kapitel 7 WEAR PARTS AND ACCESSORIES.

Connect the sensor to the meter.

The sensor is immediately ready to measure.

Storage SensoLyt®900(-P)

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measurement to the next by taking the following measures:

– Shortly rinse the calibration and sample beakers with the solution the

beakers are to be filled with next.

– Between measurements, rinse the electrode with the solution that fol-

lows. Alternatively, you can also rinse the electrode with deionized

water and then carefully dab it dry.

To measure in aqueous solutions, it is recommended to immerse the elec-

trode in a vertical or slightly tilted position.

Observe the correct depth of immersion and make sure the contact

between the junction and test sample is thorough. The junction (hole junc-

tion) is in the area of the bottom end of the shaft.

For measurements in aqueous solutions, provide approximately the same

stirring conditions for measuring as for calibrating.

NOTE

Prevent contact of the pH membrane to the beaker bottom to avoid

scratches on the pH membrane.

Subsequent

calibrations

The frequency of subsequent calibrations depends on the application. The

meters provide an option where you can enter a calibration interval. After the

calibration interval has expired, the meter will automatically remind you of the

due calibration.

3Storage

During short

measuring breaks

Immerse the electrode in reference electrolyte (KCl 3 mol/L, Ag+free). Prior

to the next measurement, shortly rinse the electrode with the test sample or

deionized water.

Overnight or

longer

Put the clean electrode in the watering cap that is filled with reference elec-

trolyte (KCl 3 mol/L, Ag+free).

NOTE

Do not store the electrode dry or in deionized water.

The electrode could be permanently damaged by this.

If the liquid in the watering cap has dried up, condition the electrode in

reference electrolyte (KCl 3 mol/L, Ag+ free) for at least 24 hours.

Junction

SensoLyt®900(-P) Aging

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4 Aging

pH electrodes are consumables. Every pH electrode undergoes a natural

aging process. With aging, the responding behavior becomes slower and the

electrode slope and asymmetry change. Moreover, extreme operating condi-

tions can considerably shorten the lifetime of the electrode. These are:

Strong acids or lyes, hydrofluoric acid, organic solvents, oils, fats, bro-

mides, sulfides, iodides, proteins

High temperatures

High changes in pH and temperature.

The warranty does not cover failure caused by measuring conditions and

mechanical damage.

5 Maintenance and cleaning

Cleaning Remove water-soluble contamination by rinsing with deionized water. Other

types of contamination have to be removed as follows while the contact time

with the detergents should be kept as short as possible:

NOTE

Hydrofluoric acid, hot phosphoric acid and strong alkaline solutions

destroy the glass membrane.

After cleaning Rinse the electrode with deionized water and condition it in reference elec-

trolyte solution for at least 1 hour. Then recalibrate the electrode.

During longer storing periods, salt sediments may develop on the

watering cap. They do not affect the measuring characteristics

and can easily be removed with deionized water when the elec-

trode is put into operation again.

Contamination Cleaning procedure

Fat and oil Rinse with water containing household wash-

ing-up liquid

Lime and hydroxide deposits Rinse with citric acid (10 % by weight)

Technical data SensoLyt®900(-P)

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6 Technical data

The electrodes meet the requirements according to article 3(3) of the direc-

tive, 97/23/EC ("pressure equipment directive").

General features Reference electrolyte Polymer electrolyte, AgCl free

Junction 1-hole junction

Shunt conduction element Ag/AgCl

Temperature sensor Integrated NTC 30

(30 kat 25 °C / 77 °F)

Measurement and

application

characteristics

pH measuring range 0.000 ... 12.000

Allowed temperature range 0 ... 60 °C

Membrane resistance at

25 °C

< 500 MOhm

Typical application Field

Accuracy of the

IDS measuring

technique

Measured parameter Accuracy (± 1 digit)

pH ± 0.004

U [mV] ± 0.2

T [°C] ± 0.1

Pressure range at

temperature

Temperature allowed overpressure

0 °C (32 °F) 1000 kPa (10 bar)

20 °C (68 °F) 1000 kPa (10 bar)

30 °C (86 °F) 500 kPa (5 bar)

40 °C (104 °F) 300 kPa (3 bar)

60 °C (140 °F) 100 kPa (1 bar)

IDS plug Connection type 4-pole, watertight plug connection with lock,

reverse polarity protected

Shaft dimensions,

material

Shaft length 120 mm

Shaft diameter 12 mm

Shaft material Glass

IDS plug Synthetic materials: Glass fiber reinforced

Noryl, TPU, TPC-ET, POM, PVC, PEEK,

PBT

O-ring: FPM

Contacts gold-plated

SensoLyt®900(-P) Wear parts and accessories

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7 Wear parts and accessories

Storage With watering cap; filled with KCl 3 mol/L, Ag+free

Disposal Residual waste

Maintenance

equipment

Description Model Order no.

Reference electrolyte solution 250 ml

to fill the watering cap

(KCl 3 mol/l, Ag+-free)

KCl-250 109 705

Connection

cableSensoLyt®

900(-P) - meter

Description Model Order no.

IDS connection cable, 1.5 m AS/IDS-1.5 903 850

IDS connection cable, 3 m AS/IDS-3 903 851

IDS connection cable, 6 m AS/IDS-6 903 852

IDS connection cable, 10 m AS/IDS-10 903 853

IDS connection cable, 15 m AS/IDS-15 903 854

IDS connection cable, 20 m AS/IDS-20 903 855

IDS connection cable, 25 m AS/IDS-25 903 856

IDS connection cable, 40 m AS/IDS-40 903 857

IDS connection cable, 60 m AS/IDS-60 903 858

IDS connection cable, 100 m AS/IDS-100 903 859

General

accessories

Description Model Order no.

Blind plug for IDS plug BPO/IDS 900 908 371

Armoring without protective hood A 925-P 903 838

Armoring with plastic protective hood A 925-P/K 903 839

Armoring with steel protective hood A 925-P/S 903 840

Wear parts and accessories SensoLyt®900(-P)

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