ABB KM26 User Manual

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ABB MEASUREMENT AND ANALYTICS | OPERATING INSTRUCTION
KM26
Magnetic level gauges
Magnetic level gauge, MagWave
dual chamber level system and
external chamber
Innovative magnetic
level gauge solutions
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Magnetic level gauges
Introduction
With over 350,000 installations worldwide, the
KM26 magnetic level gauge has provided custom
engineered solutions to liquid level applications in
industries such as: oil and gas, refinery, chemical,
petrochemical, power generation and many more.
The KM26 MLG has proven itself to be a safe,
reliable, maintenance free solution for total and / or
interface level detection in toxic, corrosive, high
pressure and high temperature processes.
ABB offers the standard KM26 magnetic level gauge
with a chamber of virtually any non-magnetic
material, extruded process connections, a custom
engineered float and all accessories with 316
stainless steel construction.
ABB also offers a dual chamber redundant level
system, which has a proven record of improving
feedwater heater reliability in power plants around
the world. The MagWave combines a highly visible
magnetic level indicator with the precise level
measurement of a guided wave radar transmitter.
Redundant level control can be achieved by adding a
magnetostrictive transmitter or switch to the float
chamber.

ABB KM26 Specifications

General

Brand	ABB
Model	KM26
Category	Measuring Instruments
Language	English

Summary

1 Introduction

KM26 MLG Overview

Details the design, construction, and operational principles of the KM26 magnetic level gauge, including its components.

2 Safety

General Safety and Compliance

Overview of safety aspects, improper use, technical limits, and compliance with regulations and standards.

Qualified Personnel, Warranty, and Returns

Covers qualified personnel, warranty provisions, operator liability, returning devices, and disposal procedures.

Safety Information and Symbols

Details safety precautions for electrical installation, maintenance, and hazardous atmospheres, explaining symbols.

Certifications and Grounding

Explains certifications, nameplates, and the critical importance of grounding/earthing for safe operation.

Temperature and ATEX Compliance

Details temperature classifications, ATEX marking, PED compliance, and storage/handling information.

3 Mounting

Mounting General and Parts

General installation guidelines, hazardous area considerations, and understanding the MLG chamber and its parts.

MLG Configurations and Floats

Details MLG configurations (Side, Top, Dual) and the function and installation of floats.

Float Stop Springs and Indicators

Explains float stop springs and introduces indicator types: shuttle and bar-graph, with their details.

Limit Switches and Transmitter Installation

Discusses limit switches, their use, and the installation of magnetostrictive transmitters.

Installation Procedures and Options

Covers installation without insulation, with blankets/pads, and electric heat tracing options.

Valves, Testing, Insulation, and Scale Zero

Details isolation valves, pressure testing, magtraps, insulation, and setting the scale zero.

Indicator Tube Replacement

Provides a step-by-step procedure for removing and replacing the indicator tube.

Insulation Guidelines and Pipe Wrap

Details insulation requirements, pads, and pipe wrap blanket installation procedures.

Special Chamber and Cryogenic Options

Explains oversize chambers, cryogenic insulation, and the Mag wave (MW05) system.

4 Troubleshooting

Troubleshooting Common Issues

Covers indicator decoupling, float issues, and problems with limit switches not functioning correctly.

5 Service and maintenance

Service, Startup, and Removal

Details equipment needs, startup procedures, removing from service, and general maintenance/cleaning.

Parts and Glass Replacement

Covers ordering spare parts and procedures for replacing shuttle or bargraph indicator glass.

6 MLG parts

KM26S and KM26T Parts Breakdown

Illustrates and lists components for KM26S and KM26T models for identification and ordering.

7 MLG parts ordering

Ordering Information and Compliance

Covers ordering MLG parts, customer-specific info, and EU declarations/certificates.

10 Warranty

Warranty Statement and Terms

Details warranty periods, conditions, limitations, and procedures for defective items.