Arkon Channelmag User Manual

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CHANNELMAG FLOWMETERS

FOR OPEN CHANNELS AND NON- FULL PIPES

RTM- Expolink s.r.o., Prikop 8, 60200 Brno, Czech Republic

FOREWORD

This instruction manual is designed to help you gain a thorough understanding of the operation of the equipment. ARKON recommends that you read this manual completely before placing the equipment in service.

Although ARKON designs reliability into all equipment, there is always the possibility of a malfunction occurring. You can use this manual to help in diagnosing and repairing the malfunction, if possible.

If the malfunction persists, call or write the ARKON Customer Service Department for assistance.

Address and contact information:

RTM- Expolink s.r.o., Prikop 8, 60200 Brno, Czech Republic

Tel: +420 545 175 834. Tel/ Fax: +420 545 175 684

Email: office@rtm-expolink.com

Website: www.arkon.co.uk

For other countries, consult your nearest ARKON representative. Simple difficulties can often be diagnosed over the phone. If it is necessary to return the equipment to the factory for service, please read our terms and conditions, available on request or from our

website.

ARKON welcomes suggestions that would improve the information presented in this manual or enhance the operation of the equipment itself.

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DANGER

WARNING

CAUTION

IMPORTANT – PLEASE READ

The installation and operation of this product may put you at risk of serious injury or even death. Take whatever precautions are necessary to ensure your safety before making an installation or working on one. Never work alone or unsupervised. Install and operate this product in accordance with all applicable safety and health regulations, as well as any appropriate local ordinances.

This product may be installed in conﬁned spaces. Examples of conﬁned spaces are manholes, pipelines, digesters, and storage tanks. These places can be dangerous or fatal if you are not suitably prepared. The primary hazards of conﬁned spaces are the possibility of poisoned air and the lack of proper ventilation. Work in such places is governed by OSHA 1910.146, and may require a permit before entering. The other major hazard particular to this product is its extreme weight, which makes it dangerous to handle and creates the risk of being crushed or struck by the unit during installation.

This manual may also contain Material Safety Data Sheets (MSDS) for chemical agents supplied or recommended for use with this product. If needed, these sheets will be in the MSDS Appendix. These sheets provide information about possible hazards from the chemicals. Additional MSDS, covering various proprietary agents (name-branded or trademarked mixtures) that can also be used with this product, are available from the manufacturers of those agents.

This manual uses the following notations to set apart hazard warnings and notes:

DANGER describes situations that will result in loss of life or serious personal injury, unless avoided. The emphasis is on clear and immediate threats to your life or safety.

WARNING describes situations that could result in loss of life or serious personal injury unless avoided. The emphasis here is on the potential for a serious accident

CAUTION describes situations that may result in moderate personal injuries, property damage, or damage to the equipment, unless avoided

NOTES draw your attention to particular features, practices, tips, or other information useful in setting up or operating the product.

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Note

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ChannelMag

Table of Contents

Section 1 Introduction

1.1 Scope: ChannelMag CM2 6

1.2 Scope: ChannelMag PM2 7

1.3 Safety 8

Section 2 Installation

2.1 Media Considerations 9

2.2 Location and Mounting 9

2.3 Straight Lengths of Channel / Pipe 10

2.3.1 Straight Lengths of Channel (CM2) 10

2.3.2 Straight Lengths of Pipe (PM2) 10

2.3.3 Important Note 11

2.4 Installation, Dimensions and Approximate Weights 11

2.4.1 CM2 Sensors 11

2.4.2 Installation of 2 x CM2 ChannelMag Sensors 13

2.4.3 CM2/D Dimensions and Approximate Weights 14

2.4.4 PM2 Sensors in Full Pipes 15

2.4.5 PM2 Sensors in Non-Full Pipes 16

2.4.6 Installation of PM2 Sensors With Magnetic Enhancement Band 17

2.4.7 ChannelMag PM2 Enhancement Plate Expander Mechanism 18

2.4.8 ChannelMag PM2 Weights and Dimensions 18

2.5 Grounding 18

2.6 Cable Types 19

2.6.1 ChannelMag Junction Box Wiring Diagram 20

2.6.2 ChannelMag Entela Approval 21

2.7 Cable Runs From the Junction Box 21

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9 10 10 10 11 11 11 13 14 15 16 17 18 18 18 19 20 21 21

Section 3 Calibration Data

3.1 Calibration and Range Factors 22

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Section 4 Maintenance

4.1 Cleaning 23

4.2 Zero Span Checking 23

4.3 Effect of Moisture Ingression 23

4.4 Effect of a Grounded Electrode 23

4.5 Effect of One CM2 of Two Inoperative 23

4.6 Transmitter Fault 24

4.7 All Checks Good, But No Signal 24

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4.8 Erratic Signal 24

4.9 Signal or Indication “Swing” 24

Section 5 Recommended Spares

5.1 Recommended Spares 25

Table of Contents

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1.1 Scope:

ChannelMag

Section 1 Introduction

The ChannelMag CM2 is suitable for open channels having diverse cross sectional shapes from 6” to

ChannelMag CM2

200 feet (150 mm to 60 m). They meet or exceed the requirements of ISO 9213 and are calibrated in a long open tank, believed to be the largest NIST traceable facility available. The ChannelMags are calibrated in accordance with ISO* approved methods. Each ChannelMag system is normally supplied with a NIST traceable Calibration Certiﬁcate.

Magnetic enhancement plates are ﬁxed to and calibrated with ChannelMag sensor types CM2/8” – 40”. The enhancement plates are purposely made to the required shape of the channel, to widths or diameters from 10” to 15 feet (250 mm to 3 m). Their purpose is to determine the distribution pattern of magnetic ﬂux on calibration in ARKON test laboratory and to insure it is the same as the distribution on-site. In this way, the test calibration is the same as on-site. For channels less than 10” (250 mm) or wider than 15 feet (4500 mm), or when used with ChannelMag type CM2/D, the effectiveness of the enhancement plates is minimal, so they are not normally supplied.

ChannelMag CM2 sensors generate a powerful magnetic ﬁeld over the whole or signiﬁcant area of the channel. They operate using Faraday’s Law, where a conductor moving in a magnetic ﬁeld induces a voltage, the amplitude of which is proportional to the velocity of the conductor. The conductor is the media being measured. Large conical electrodes on the CM2 sensor measure the voltage signal, which is the mean velocity of the complete cross sectional ﬂow and is unaffected by media viscosity or density.

Volumetric ﬂow is computed in the 4411e by multiplying level x mean velocity. The level signal from a diverse range of cross sectional shapes can be linearized in the 4411e. Level is measured normally by a high resolution ultrasonic level transducer. If the level sensor needs to be hidden from view, or if there is substantial froth on the media surface, then a high resolution pressure transducer is used under the ramps of the CM2 sensor.

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Chanel Mag

Section I Introduccion

1.2 Scope: ChannelMag PM2

The ChannelMag PM2 Series is suitable for full or partially full pipes from 20” to 120” (500 3000 mm). They meet or exceed the requirements of ISO 9213 and are calibrated in a long open tank, believed to be the largest NIST traceable facility available. ChannelMags are calibrated in accordance with ISO approved methods. Each ChannelMag system is normally supplied with a NIST traceable Calibration Certiﬁcate.

Magnetic enhancement plates are ﬁxed to and calibrated with the ChannelMag sensor(s). The enhancement plates are custom made to the required diameter of the channel. Their purpose is to determine the distribution pattern of magnetic ﬂux on calibration in ARKON test laboratory and to insure it is the same as the distribution on-site. In this way, the test calibration is the same as onsite. The other function of the enhancement plates is to retain the ChannelMag sensors in place in the pipe. They incorporate an expander mechanism which holds the sensor(s) ﬁrmly in place, without the need of further ﬁxtures or to cut holes in the pipe.

ChannelMag sensors generate a uniquely powerful magnetic ﬁeld over the whole cross sectional area of the pipe. They operate using Faraday’s Law, where a conductor moving in a magnetic ﬁeld induces a voltage, the amplitude of which is proportional to the velocity of the conductor. The conductor is the media being measured. Large conical electrodes on the PM2 sensor measure the voltage signal, which is the mean velocity “weighted” to account for the complete cross sectional velocity proﬁle. The signal is unaffected by media viscosity or density.

Volumetric ﬂow in partially ﬁlled pipes is computed in the 4411e by multiplying level x mean velocity. The level signal is linearized in the 4411e. Level is measured normally by a high resolution pressure transducer, which is used under the ramps of the ChannelMag velocity sensor. This has the advantage of being supplied with the PM2 sensor as a single unit, as well as being virtually insensitive to froth on the surface of the media. However, an ultrasonic level transducer is available, which must be mounted in a suitable manhole.

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DANGER

WARNING

ChannelMag

Section 1 Introduction

1.3 Safety

Use the lifting brackets provided on the sensor (see drawing in Sections 2.2 and 2.4).

The following warnings are provided for your safety. You should read the general note regarding danger preceding this introduction, as well as these warnings when working with this equipment:

Crush hazard. The ﬂowmeters may be very heavy (net weights from 45 to 450 lb / 20 to 200 kg each). You could be crushed to death, or very seriously injured, if the ﬂowmeter slips during installation and strikes you or falls on you. Handle with care when installing and be sure that hoisting apparatus can safely lift the total weight of the ﬂowmeter (see Section 5.1).

Before installation, make sure the operating environments of the ﬂowmeter and ancillary equipment are consistent with appropriate national approvals such as USA UL or NEC, Canadian CSA, European CE.

The installation must be carried out by qualiﬁed personnel only. Read the entire manuals before attempting to install or operate the equipment, including for ancilliary equipment.

The ﬂowmeter electronics require normal AC power supply. The ﬂowmeter and ancillary equipment produces no electro-magnetic ﬁelds that are harmful to the environment or to personnel. They are certiﬁed as such to meet European CE requirements.

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