Valmet Valmet MCA Istruzioni operative

Valmet Microwave

Consistency Transmitter

– Valmet MCA

Installation &

Owner’s manual

OUL00298 V2.3 EN

Table of contents

Caution / Warning

Recycling and disposal

Introduction 71.

General............................................................71.1.

Structure 92.

MCA-F..............................................................92.1.

MCA-FT............................................................92.2.

Sensor Electronics ........................................122.3.

Transmitter Central Unit (TCU) .....................122.4.

Installation 133.

General principles..........................................133.1.

Choosing the installation site.........................133.2.

Sensor dimensions.........................................173.3.

Mounting dimensions.....................................193.4.

MCA-F process coupling................................193.5.

Transmitter Central Unit (TCU) and shield.....203.6.

Electrical Connections ...................................203.7.

Valmet MCA-F Sensor Deflector Plate Installation

Guide..............................................................22

3.8.

Setting Up 234.

Mechanical Inspection....................................234.1.

Installation......................................................234.2.

Cabling Inspection..........................................234.3.

Electrical Inspection.......................................234.4.

Configuration and Calibration........................234.5.

User Interface and Operation 255.

Transmitter Central Unit.................................255.1.

Operations Menu............................................265.2.

Configuration 276.

Configuration menu........................................276.1.

Choosing and scaling the output signal.........276.2.

User Settings..................................................276.3.

Device information ........................................286.4.

Setting the date and time...............................286.5.

Address..........................................................286.6.

Calibration 297.

Sample Taking................................................297.1.

Entering Laboratory Results..........................307.2.

Offset Correction............................................307.3.

Fillers..............................................................307.4.

Calibration and sample history ......................317.5.

Diagnostics 338.

Error Table......................................................338.1.

Diagnostics Values.........................................338.2.

Diagnostics Limits..........................................338.3.

Special Functions 359.

Chemical compensation.................................359.1.

Sensitivity Correction.....................................389.2.

Recipes..........................................................399.3.

Troubleshooting 4110.

Troubleshooting.............................................4110.1.

Process Conditions........................................4110.2.

Self-diagnostics error messages....................4310.3.

Replacing Components 4511.

Sensor Electronics.........................................4511.1.

Antenna cables, Fork Sensor.........................4611.2.

Antenna Cables, FT Sensor...........................4811.3.

Antennas, Fork Sensor..................................4911.4.

Antennas, FT Sensor.....................................4911.5.

TCU ...............................................................5011.6.

Installing Vortex Cooler..................................5011.7.

HART® User Interface 5112.

About the interface.........................................5112.1.

Measurement.................................................5212.2.

Configure........................................................5212.3.

Calibrate.........................................................5312.4.

Diagnostics.....................................................5712.5.

Technical Specifications

Service kits & Spare parts

CE Declaration of conformity

Installation & Owner’s manual OUL00298 V2.3 EN

Valmet Mircowave Consistency Transmitter

Installation & Owner’s manual OUL00298 V2.3 EN

Valmet Mircowave Consistency Transmitter

Caution / Warning

During installation, maintenance and service operations, remember that

the sample line may contain hot sample or water – be careful!

Always check that the incoming voltage & frequency are correct before

making any electric connections. Wrong connection may damage the

equipment! The applicable electrical safety regulations must be closely

followed in all installation work!

Before any welding works in the vicinity of the devices, make sure that

operating voltage is not connected!

Installation & Owner’s manual OUL00298 V2.3 EN

Valmet Mircowave Consistency Transmitter

Recycling and disposal

When sorted by material, nearly all parts of the device can be recycled.

A materials list is delivered with the device. Upon request, the manufac-

turer will provide more detailed instructions for recycling and disposal.

Used devices may also be returned to the manufacturer for recycling and

disposal against a separate fee.

Installation & Owner’s manual OUL00298 V2.3 EN

Valmet Mircowave Consistency Transmitter

1. Introduction

1.1. General

Valmet Mircowave Consistency Transmitter (Valmet

MCA) functions based on the measurement of mi-

crowave propagation time.

Microwaves are electromagnetic radiation; the flying

time depends on the media's dielectric constant. Flying

time is calculated as follows:

c = speed of light in a vacuum

er = media's dielectric constant

In water microwaves advance at a much slower speed

that in wood fiber. Therefore, consistency can be calcu-

lated based on the time it takes the microwaves to

move through the measured mass.

The advantages of this measurement procedure are

pulp type-independence, insensitivity to flow speed,

and single-point calibration.

There are two different models of Valmet MCA sensors:

- Valmet MCA-F Fork sensor (figure 2).

- Valmet MCA-FT Flow-through sensors (figure 3).

Valmet MCA also includes a user interface known

as Transmitter Central Unit (TCU) (figure 1).

Fig. 1. Transmitter Central Unit (TCU).

Fig. 2. Valmet MCA-F.

Fig. 3. MCA-FT.

Installation & Owner’s manual OUL00298 V2.3 EN

Valmet Mircowave Consistency Transmitter

Notes

Installation & Owner’s manual OUL00298 V2.3 EN

Valmet Mircowave Consistency Transmitter

2. Structure

Valmet MCA comprises the sensor unit and a user in-

terface called Transmitter Central Unit. There are two

sensor models: MCA-F Fork Sensor and MCA-FT Flow-

Through Sensor, which come in six different sizes

ranging from FT-50 to FT-300. The appropriate model

is selected according to the diamater of the process

pipe.

2.1. MCA-F

In the fork-type MCA-F sensor, the microwave antennas

are mounted on the sensor body, which is installed via

a coupling into the process pipe. On the end of the

sensor there is a probe antenna and on the base there

is a flushmounted antenna. In addition, on the end of

the sensor body there is a Pt-100 thermoelement. The

antenna cables and the Pt-100 sensor cables run

through the inside of the sensor to the sensor electron-

ics.Figure 3 shows the sensor's construction drawing.

The material of the wetted metal parts is AISI316L,

with options of titanium or hastelloy. The antenna ma-

terial is polished ceramic.

Fig. 1. Valmet MCA-F: 1. Pt-100 Thermoelement, 2.

Microwave Antennas, 3. Sensor Electronics, 4. Sensor

Cable Connector.

2.2. MCA-FT

The body of the Flow-Through sensor is a pipe, which,

when installed, replaces an identical length of process

pipe. Flush-mounted antennas are installed on opposite

sides of the sensor body, so measurement takes place

through the pipe. The sensor electronics casings is in-

stalled on the sensor body by means of a connecting

pipe. The Pt-100 sensor, which measures process

temperature, is installed inside the connecting pipe.

The antenna cables, which are protected within casing,

run to the base plate of the electronics casing on the

outside of the connecting pipe. Figure 4 shows the

sensor's construction drawing.

The material of the wetted sensor and antenna

bodies is AISI 316/316L. The antenna material is pol-

ished ceramic.

Fig. 2. Valmet MCA-FT: 1. Sensor Electronics, 2.

Sensor Cable Connector, 3. Antenna Cable, 4. Pt-100

Thermoelement, 5. Microwave Antennas.

Installation & Owner’s manual OUL00298 V2.3 EN

Valmet Mircowave Consistency Transmitter

Fig. 3. Valmet MCA-F construction drawing: 1. Microwave Antenna, 2. Sensor Head, 3. Pt-100 Thermoelement,

4. Antenna Cables, 5. Sensor Body, 6. Antenna Sealing, 7. Fixing Clamp, 8. Base Plate Assembly, 9. Sensor

Electronics, 10. Sensor Cover.

Installation & Owner’s manual OUL00298 V2.3 EN

Valmet Mircowave Consistency Transmitter

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