Mettler Toledo K...x-T4 Series Kullanım kılavuzu

PFK9- / K...(x-T4)-series

High precision floor weighing platforms

ENPLCSHUTR

User manual

2

PFK9- / K...(x-T4)-series 30308864D

Contents

English ........................................................................................... 3

Polski ............................................................................................19

Čeština ........................................................................................ 35

Magyar ..........................................................................................51

Türkçe .......................................................................................... 67

EN

3

30308864D PFK9- / K...(x-T4)-series

English (Original instructions)

Congratulations on choosing the quality and precision of METTLER TOLEDO. Proper

use of your new equipment according to this User manual and regular calibration and

maintenance by our factory-trained service team ensures dependable and accurate

operation, protecting your investment. Contact us about a service agreement tailored to

your needs and budget. Further information is available at

www.mt.com/service.

There are several important ways to ensure you maximize the performance of your

investment:

1. Register your product: We invite you to register your product at

www.mt.com/productregistration

so we can contact you about enhancements, updates and important notications

concerning your product.

2. Contact METTLER TOLEDO for service: The value of a measurement is proportional

to its accuracy – an out of specication scale can diminish quality, reduce prots and

increase liability. Timely service from METTLER TOLEDO will ensure accuracy and

optimize uptime and equipment life.

– Installation, Conguration, Integration and Training:

Our service representatives are factory-trained, weighing equipment experts. We

make certain that your weighing equipment is ready for production in a cost

effective and timely fashion and that personnel are trained for success.

– Initial Calibration Documentation:

The installation environment and application requirements are unique for every

industrial scale so performance must be tested and certied. Our calibration

services and certicates document accuracy to ensure production quality and

provide a quality system record of performance.

– Periodic Calibration Maintenance:

A Calibration Service Agreement provides on-going condence in your weighing

process and documentation of compliance with requirements. We offer a variety

of service plans that are scheduled to meet your needs and designed to t your

budget.

PFK9- / K...(x-T4)-series weighing

platforms

1 Safety instructions...............................................................................................5

1.1 Intended use ........................................................................................................5

1.2 Misuse .................................................................................................................5

1.3 Safety precautions for operation in hazardous areas .................................................5

1.4 Safety precautions for weighing platforms with raisable load plate .............................6

2 Introduction .........................................................................................................6

2.1 Weighing platforms of the PFK9- / K...(x-T4)-series ................................................... 6

2.2 About this user manual..........................................................................................6

2.3 Further documents ................................................................................................ 7

3 Operation ............................................................................................................ 7

3.1 Checking the location ............................................................................................7

3.2 Checking the weighing platform..............................................................................8

3.3 Checking weighing platforms in a pit ......................................................................8

3.4 Checking ramps ...................................................................................................8

3.5 Important notes ....................................................................................................9

3.6 Installation, service and repair ................................................................................9

4 Maintenance ..................................................................................................... 10

4.1 Notes on cleaning ............................................................................................... 10

4.2 Cleaning the interior (weighing platforms with raisable load plate only) .................... 11

4.3 Subsequent treatment .......................................................................................... 12

4.4 Opening and closing load plate of PFK98_-C / KC...(x-T4) / KCS...(x-T4) .................... 12

4.5 Opening and closing weighing platforms with raisable load plate............................. 13

4.6 Disposal ............................................................................................................ 16

5 Technical data and operating limits .................................................................... 17

5.1 Maximum vercation scale interval ....................................................................... 17

5.2 Maximum permissible load .................................................................................. 17

5.3 Ambient conditions ............................................................................................. 18

5.4 Weighing interface specication ........................................................................... 18

5.5 Specications for Category 3 / Division 2 and Category 2 / Division 1 ...................... 18

4

PFK9- / K...(x-T4)-series 30308864D

1 Safety instructions

1.1 Intended use

PFK9- / K...(x-T4)-series weighing platforms are part of a modular weighing system

consisting of a METTLER TOLEDO weighing terminal and at least one weighing platform.

➜ Use the weighing platform only for weighing in accordance with this User manual.

➜ The weighing platform is intended for indoor use only.

➜ Any other type of use and operation beyond the limits of technical specications is

considered as not intended.

➜ For driving over the weighing platform only use pallet trucks. For weight limits refer to

page 17.

Legal metrology

➜ For use in legal metrology only use approved weighing platforms.

➜ When using in legal metrology, the operating company is responsible for observing

all the national weights & measurements requirements.

➜ Please contact the METTLER TOLEDO Service organization for questions related to the

use in legal for trade applications.

1.2 Misuse

▲ Do not use the weighing platform other than for weighing operations.

▲ Do not use the weighing platform in another environment or category than specied

in the table in section 2.1.

▲ Do not modify the weighing platform.

▲ Do not use the weighing platform beyond the limits of technical specications.

▲ Do not use the weighing platform for storing goods.

▲ Avoid falling goods on the weighing platform.

1.3 Safety precautions for operation in hazardous areas

PFK9- / K...(x-T4)-series weighing platforms offer options for operation in hazardous

areas, see table in section 2.1.

The operating company is responsible for the safe operation of the explosion protected

weighing system.

▲ Strictly observe the instructions of the operating company.

▲ Comply with all national regulations for operation in hazardous areas, as well as the

instructions and information in this User manual.

EN

5

Safety instructions 30308864D PFK9- / K...(x-T4)-series

1.4 Safety precautions for weighing platforms with raisable load plate

▲ Do not operate the weighing platforms with raisable load plate outside the temperature

range of –10 °C to +40 °C. Otherwise, the safety of the pneumatic springs is not

guaranteed.

▲ Strictly observe the safety instructions of the operating company.

▲ Only instructed personnel may open/close the weighing platforms with raisable load

plate.

▲ Protect the pneumatic springs against soiling and damage.

▲ Have soiled or damaged pneumatic springs replaced immediately.

▲ Pneumatic springs are spare parts. Use only the spare parts specied by

METTLER TOLEDO.

▲ The weighing platform must be checked to ensure compliance with the safety

requirements before being put into service for the rst time, following any service work

and at least every 3 years.

2 Introduction

2.1 Weighing platforms of the PFK9- / K...(x-T4)-series

This user manual focuses on the products listed below.

The PFK9- / K...(x-T4)-series offer a variety of weighing platforms to t your requirements.

Each type is available

• in various sizes and capacities,

• as approved or non-approved version.

Type Material

Raisable

loadplate Environment Ex approval

PFK988 Hot-galvanized – Dry Options for

Category 3 / Division 2

Category 2 / Division 1

PFK989 Stainless steel Sizes E / ES Wet

K...x-T4 Painted – Dry

Standard approval:

Category 2 / Division 1

K...sx-T4 Hot-galvanized Sizes E/ES Light wet

K... Power coated

–

Dry

Standard approval:

Category 3

K...s Stainless steel Wet

2.2 About this user manual

This user manual contains all information for the operator of the weighing platforms of the

PFK9- / K...(x-T4)-series.

➜ Read this User manual carefully before use.

➜ Keep this User manual for future reference.

➜ Pass this User manual to any future owner or user of the product.

6

Introduction

PFK9- / K...(x-T4)-series 30308864D

2.3 Further documents

In addition to this printed User manual you can download the following documents from

www.mt.com:

• Brochure

• Technical data sheet

• Installation information (for trained personnel under the control of the operating

company)

• Type approval documents

Type approval documents

Mechanical

assessment

of weighing

platforms

Category3

PFK9 BVS 15 ATEX H/B 002

K... DMT 02 E 012

Category2

PFK9 BVS 15 ATEX H/B 002

Kx...T4 KEMA 203104000-QUA/IND

Load cells

Category 3

MPGI (option for PFK9) BVS 10 ATEX E 131 X

TBrick (used with K...x) DMT 02 E 012

Category 2

MPXI (option for PFK9)

BVS 17 ATEX E 026 X

IECEx BVS 17.0018X

TBrick-Ex

(used with K...x-T4)

KEMA 03ATEX1130X

3 Operation

3.1 Checking the location

The correct location is crucial for the accuracy of the weighing results.

1. Ensure that the location of the weighing platform is stable, vibration-free and horizontal.

2. Observe the following environmental conditions:

– No direct sunlight

– No strong drafts

– No excessive temperature uctuations

EN

7

Operation 30308864D PFK9- / K...(x-T4)-series

3.2 Checking the weighing platform

Before starting a weighing series, perform a function check of the weighing platform and

the connected weighing terminal.

Function check

1. Make sure, that the load plate is closed and locked correctly, see section 4.4 or 4.5.

2. Make sure that the weighing platform is connected to a weighing terminal and that the

weighing terminal is switched on.

3. Make sure that the weighing platform is unloaded and the display of the weighing

terminal shows 0.

4. Load the weighing platform.

The indicator must show a value different from 0.

5. Unload the weighing platform.

The indicator must return to 0.

Verication test

For a verication test refer to the user manual of the connected weighing terminal.

If the verication seal is broken, verication is no longer valid.

3.3 Checking weighing platforms in a pit

➜ Make sure that the weighing platform does not touch the pit frame.

➜ Make sure that the gap (1) between weighing platform and pit frame is free from dirt

deposits.

3.4 Checking ramps

➜ Make sure that the weighing platform does not touch the ramp.

➜ Make sure that the gap (1) between weighing platform and ramp is free from dirt

deposits.

0.000 kg

10.520 kg

0.000 kg

1

PFK /

K...(x-T4)

1

PFK /

K...(x-T4)

1

8

Operation

PFK9- / K...(x-T4)-series 30308864D

3.5 Important notes

For best weighing results observe the following:

▲ To achieve best weighing results place the weighing sample always on the same

position on the weighing platform.

▲ Avoid abrasive and wear processes.

▲ When travelling across recessed weighing platforms with lift trucks, ensure that the

axle load does not exceed the maximum side load, see table on page 17.

▲ Avoid falling loads, shocks and lateral impacts.

3.6 Installation, service and repair

➜ For installation, conguration, service and repair of the weighing platforms call the

METTLER TOLEDO Service.

CAUTION

➜ Use only genuine METTLER TOLEDO accessories and cable assemblies with this

product. Use of anauthorized or counterfeit accessories or cable assemblies may

result in voided warranty, improper or erroneous operation or damage to property

(including the unit) and personal injury.

EN

9

Operation 30308864D PFK9- / K...(x-T4)-series

4 Maintenance

Maintenance of the weighing platform is limited to regular cleaning and subsequent oiling

for stainless steel versions.

4.1 Notes on cleaning

NOTICE

Damage to the weighing platform due to incorrect use of cleaning agents.

▲ Use only such cleaning agents that do not act on the plastics used in the weighing

platform.

▲ Only use disinfectants and cleaning agents in accordance with the manufacturer's

instructions.

▲ Do not use highly acidic, highly alkaline or highly chlorinated cleaning agents.

Avoid substances with a high or low pH value since increased danger of corrosion

otherwise exists.

▲ Be particularly careful when cleaning the load cell.

➜ Remove dirt and deposits at regular intervals from the outside and inside of the

weighing platform.

– The procedure depends both on the type of surface and on the environmental

conditions prevailing at the installation location.

– For opening and closing the weighing platform refer to section 4.4 or 4.5.

Cleaning in a dry environment (painted versions)

➜ Wipe with a damp cloth.

➜ Use household cleaning agents.

Cleaning from the outside in a wet environment

(hot galvanized or stainless steel versions)

➜ Use a water jet up to 80 °C / 176 °F and max. 80 bars, minimum distance 40cm/16".

➜ Use household cleaning agents.

Cleaning in a corrosive environment (weighing platforms with raisable load plate)

➜ Use a water jet.

– inner cleaning, load cell,

load plate opened

up to 60°C / 140 °F, max. 2bars,

minimum distance 40 cm / 16"

– outer cleaning, load plate closed up to 80°C / 176 °F, max. 80bars,

minimum distance 40cm / 16"

➜ Remove corrosive substances at regular intervals.

➜ Only use disinfectants and cleaning agents in accordance with the manufacturer's

specications and instructions.

10

Maintenance

PFK9- / K...(x-T4)-series 30308864D

Cleaning a weighing platform in a pit

➜ Ensure that the gap (1) between weighing platform and pit frame is always kept clear.

➜ Remove larger dirt deposits at the pit bottom (2) at regular intervals.

➜ Check the pit drainage channel (3) for blockage at regular intervals.

Cleaning the pneumatic springs

CAUTION

Even minor damage, corrosion or ecks of paint on the piston rod lead to failure of

the pneumatic springs.

▲ Protect pneumatic springs against soiling and damage.

➜ When cleaning the pneumatic springs make sure that the cleaning agent will not

cause any corrosion.

➜ The cleaning agent must not corrode any brass components of the pneumatic spring

sealings.

4.2 Cleaning the interior (weighing platforms with raisable load plate only)

Note

Only start the cleaning process when the raisable load plate is secured in its upright

position.

The load plate has to be removed or the weighing platform opened respectively in order

to clean the load cell.

NOTICE

Damage to the load cell due to improper handling.

▲ Never touch, direct compressed air against or spray the rubber membrane (1) of

the load cell.

1. Remove load plate or open weighing platform, see section 4.4 or 4.5.

2. Blow out dirt or ush out with a medium-power water jet (< 2 bar).

3. Replace load plate or close weighing platform see section 4.4 or 4.5.

1

2

3

1

EN

11

Maintenance 30308864D PFK9- / K...(x-T4)-series

4.3 Subsequent treatment

In order to protect the weighing platform, carry out the following subsequent treatment:

DANGER

Danger of injury due to failure of the pneumatic springs.

▲ With raisable load plates do not oil the piston rods of the pneumatic springs.

➜ Rinse the weighing platform with clear water and remove cleaning agent completely.

➜ Dry off the weighing platform with a lint-free cloth.

➜ With stainless steel weighing platforms, treat the inside and outside with an oil suitable

for foodstuffs. With raisable load plates and recessed weighing platforms ensure that

all moving parts and hinges are treated with oil, too.

4.4 Opening and closing load plate of PFK98_-C / KC...(x-T4) / KCS...(x-T4)

CAUTION

Danger of injury due to the heavy load plate.

▲ Always ask a second person to help removing the load plate.

▲ Wear gloves when removing the load plate.

1. Remove the load plate by pivoting the two side handles (1) outward.

2. Replace the load plate (2) so that the symbol  is located above the level indicator.

3. Make sure that the load supports (3) in the corners of the weighing platform are

vertical.

OIL

1

2

3

12

Maintenance

PFK9- / K...(x-T4)-series 30308864D

4.5 Opening and closing weighing platforms with raisable load plate

DANGER

Danger of injury due to slamming load plate. Crushing hazard.

▲ Wear personal protective equipment when removing the load plate, e.g., protective

gloves, safety shoes and helmet.

▲ Ensure that there is no oil below the weighing platform. An oil leakage indicates a

defective pneumatic spring. If this is the case, have the defective pneumatic springs

replaced immediately by the METTLER TOLEDO Service.

▲ Open/close the weighing platform only from the right-hand side.

▲ Only open and close the load plate with the supplied tools.

▲ Ensure that there are no persons in the danger area under the opened load plate

while the position of the load plate is not secured.

▲ Make sure that the safety wedge is mounted correctly prior to working under the

raised load plate.

Opening the weighing platform with raisable load plate

1. Remove weighing goods or superstructure from the load plate.

2. Use a screwdriver to screw out the cover screw (1).

3. Turn the handle (2) clockwise into the exposed thread until it stops.

4. Position yourself on the right-hand side next to the weighing platform.

5. Pull the load plate up using the handle.

DANGER

Danger of injury due to slamming load plate.

▲ Ensure that the pneumatic spring has extended completely.

2

1

EN

13

Maintenance 30308864D PFK9- / K...(x-T4)-series

Securing the raisable load plate

1. On the right hand side of the weighing platform slide the slot of the supplied safety

wedge (1) onto the load plate.

2. Slide the safety wedge down until it will go no further.

3. Make sure that the catch (2) is on the inner side of the load frame.

The raised load plate is secured and cleaning or service work can be performed safely.

1

2

14

Maintenance

PFK9- / K...(x-T4)-series 30308864D

Closing the weighing platform with raisable load plate

WARNING

Crushing hazard

▲ Take care that no items or body parts are between load plate and load frame (danger

zone) of the weighing platform.

1. Slide the safety wedge slightly upwards.

2. Remove the safety wedge from the load plate.

3. Press the load plate down using the handle.

4. Ensure that the load plate latches in and lies evenly on the load frame.

5. Turn out the handle counter-clockwise.

6. Screw the cover screw into the load plate.

2.

1.

2

1

EN

15

Maintenance 30308864D PFK9- / K...(x-T4)-series

4.6 Disposal

In conformance with the European Directive 2002/96 EC on Waste Electrical and Electronic

Equipment (WEEE), this device may not be disposed of with domestic waste. This also

applies to countries outside the EU, according to their specic requirements.

➜ Please dispose of this product in accordance with local regulations at the collecting

point specied for electrical and electronic equipment.

Disposal of pneumatic springs

• The pneumatic springs must not be opened or heated.

• The pneumatic springs may only be opened according to the manufacturer's

instructions.

• The oil lling of the pneumatic springs must be disposed of according to the

manufacturer's instructions.

16

Maintenance

PFK9- / K...(x-T4)-series 30308864D

5 Technical data and operating limits

5.1 Maximum vercation scale interval

PFK98_- C300

C600

D600 D1500

E1500

ES1500

E3000

ES3000

Verication scale interval e [g] 10 20 50 50 100

K...(x-T4)

C300

CS300

C600

CS600 D600

D1500

E1500

ES1500

E3000

ES3000

3 x 3000 e

Multi Interval

max / e [kg]

60 / 0.02

150 / 0.05

300 / 0.1

150 / 0.05

300 / 0.1

600 / 0.2

150 / 0.05

300 / 0.1

600 / 0.2

300 / 0.1

600 / 0.2

1500 / 0.5

600 / 0.2

1500 / 0.5

3000 / 1

5.2 Maximum permissible load

All weighing platforms and the MPGI high precision load cell are equipped with an

overload protection. However, if the load exceeds the maximum permissible load, damage

of mechanical parts may occur.

The static load-bearing capacity, i.e. the maximum permissible load, is dependent on the

type of loading (positions A – D).

PFK98_-

Position C300 C600

D600

D1500

E1500

E3000

ES1500

ES3000

A central load 1000 kg 1000 kg 3500 kg 4500 kg 4500 kg

B side load 650 kg 650 kg 2300 kg 3000 kg 3000 kg

C one-sided cornerload 330 kg 330 kg 1150 kg 1500 kg 1500 kg

D drive over 250 kg 250 kg 600 kg 600 kg 600 kg

K...(x-T4)

Position

C300

CS300

C600

CS600 D600

D1500

E1500

ES1500

E3000

ES3000

A central load 500 kg 1000 kg 3500 kg 4500 kg 4500 kg

B side load 330 kg 650 kg 2300 kg 3000 kg 3000 kg

C one-sided cornerload 165 kg 330 kg 1150 kg 1500 kg 1500 kg

A

B

C

D

EN

17

Technical data and operating limits 30308864D PFK9- / K...(x-T4)-series

5.3 Ambient conditions

Operating temperature –10 °C to + 40 °C / 14 °Fto104 °F

Relative humidity 20 % to 80 %, non condensing.

IP protection type K...x-T4 IP66/IP67

PBK9.. IP66/IP68

K... IP66/IP67

5.4 Weighing interface specication

5.4.1 PBK9-series

Interface type RS422

Interface protocol SICSpro

Max. weight update rate 92 ups

5.4.2 K...(x-T4)-series

Interface type CL 20 mA

Interface protocol IDNet

Max. weight update rate 20 ups

5.5 Specications for Category 3 / Division 2 and Category 2 / Division 1

You will nd the specications for Category 3 / Division 2 and Category 2 / Division 1 in

the corresponding type approval documents, see table in section 2.3.

18

Technical data and operating limits

PFK9- / K...(x-T4)-series 30308864D

PL

19

30308864D Serii PFK9- / K...(x-T4)

Polski (Tłumaczenie)

Gratulujemy wyboru jakości i precyzji rmy METTLER TOLEDO. Stosowanie nowego

urządzenia zgodnie z informacjami podanymi w Podręczniku użytkownika oraz regularna

kalibracja i konserwacja wykonywana przez nasz przeszkolony w zakładzie zespół

serwisowy zapewniają niezawodną i dokładną pracę, chroniąc Państwa inwestycję.

Prosimy o kontakt w sprawie umowy serwisowej dostosowanej do indywidualnych potrzeb

i budżetu. Więcej informacji dostępnych jest na stronie

www.mt.com/service.

Istnieje kilka ważnych rozwiązań zapewniających zmaksymalizowanie wydajności

poczynionej inwestycji:

1. Zarejestruj swój produkt: Zapraszamy do rejestracji Państwa produktu pod adresem

www.mt.com/productregistration

Dzięki temu będziemy posiadali możliwość skontaktowania się z Państwem w

przypadku rozszerzeń, aktualizacji i ważnych wiadomości dot. produktu.

2. W celu skorzystania z usług serwisowych należy skontaktować się z rmą

METTLER TOLEDO: Wartość pomiaru jest proporcjonalna do jego dokładności –

stosowanie skali niezgodnej ze specykacją może prowadzić do spadku jakości,

zmniejszenia zysków i zwiększenia odpowiedzialności. Terminowy przegląd serwisowy

wykonany przez METTLER TOLEDO zagwarantuje precyzyjność, zoptymalizuje czas

pracy bez przestojów oraz żywotność urządzenia.

– Montaż, konguracja, integracja i szkolenie:

Nasi przedstawiciele serwisowi są przeszkolonymi w zakładzie ekspertami

ds. urządzeń ważących. Gwarantujemy, że nasze urządzenie jest gotowe do

produkcji w rozsądnej cenie i na czas, a personel jest w pełni przeszkolony w celu

zapewnienia sukcesu biznesowego.

– Dokumentacja dotyczącą kalibracji wstępnej:

Ze względu na unikalność środowiska montażowego oraz wymagań w odniesieniu

do zastosowań każdej wagi przemysłowej konieczne jest przeprowadzenie

testów oraz certykacji sprawności. Nasze usługi kalibracji i certykaty dowodzą

dokładności w celu zapewnienia wysokiej jakości produkcji oraz rejestru systemu

jakości w odniesieniu do wydajności.

– Konserwacja okresowa kalibracji:

Umowa na wykonanie usługi kalibracji zapewnia stałe zachowanie pewności

dotyczącej procesu ważenia i zgodności dokumentacji z wymaganiami. Oferujemy

różne plany usług opracowane zgodnie z wymaganiami klienta, a także w celu

dopasowania do wielkości budżetu.

Platformy ważące serii PFK9- / K...(x-T4)

1 Instrukcje bezpieczeństwa ................................................................................. 21

1.1 Stosowanie zgodne z przeznaczeniem .................................................................. 21

1.2 Niewłaściwe użycie ............................................................................................. 21

1.3 Środki ostrożności w przypadku eksploatacji urządzenia w strefach zagrożonych

wybuchem ......................................................................................................... 21

1.4 Środki ostrożności dotyczące platform ważących z podnoszoną płytą obciążenia .....22

2 Wstęp ...............................................................................................................22

2.1 Platformy ważące serii PFK9- / K...(x-T4) ............................................................... 22

2.2 Informacje o niniejszym Podręczniku użytkownika .................................................23

2.3 Pozostała dokumentacja .....................................................................................23

3 Obsługa urządzenia ...........................................................................................23

3.1 Sprawdzenie miejsca montażu ............................................................................. 23

3.2 Kontrola platformy ważącej .................................................................................. 24

3.3 Kontrola platform ważących we wgłębieniu ...........................................................24

3.4 Kontrola ramp .................................................................................................... 24

3.5 Ważne informacje ............................................................................................... 25

3.6 Montaż, serwis i naprawa ....................................................................................25

4 Konserwacja .....................................................................................................26

4.1 Uwagi dot. czyszczenia .......................................................................................26

4.2 Czyszczenie wnętrza (wyłącznie platformy ważące z podnoszoną płytą

obciążenia) ........................................................................................................27

4.3 Dalsze kroki procedury czyszczenia ......................................................................28

4.4 Otwieranie i zamykanie płyty obciążenia PFK98_-C / KC...(x-T4) / KCS...(x-T4) ..........28

4.5 Otwieranie i zamykanie platform ważących z podnoszoną płytą obciążenia .............29

4.6 Utylizacja ........................................................................................................... 32

5 Dane techniczne i parametry graniczne pracy urządzenia ....................................33

5.1 Maksymalna podziałka legalizacji skali ................................................................. 33

5.2 Maksymalne dopuszczalne obciążenie ..................................................................33

5.3 Warunki otoczenia ..............................................................................................34

5.4 Specykacja interfejsu ważenia ............................................................................34

5.5 Specykacja dla Kategorii 3 / Dział 2 i Kategorii 2 / Dział 1 ....................................34

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