Emerson Rosemount 2535 Bedienungsanleitung

Quick Start Guide

00825-0100-2535, Rev AA

October 2019

Rosemount™ 2535 Solids Level Switches

Vibrating Rod

Contents

Introduction.................................................................................................................................3

Mechanical installation.................................................................................................................8

Electrical installation.................................................................................................................. 13

Configuration.............................................................................................................................19

Operation...................................................................................................................................21

Maintenance.............................................................................................................................. 22

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2 Quick Start Guide

1 Introduction

The level switch detects the presence and absence of a process media at its

installation point, and reports it as a switched electrical output.

Note

Other language versions of this Quick Start Guide can be found at

Emerson.com/Rosemount.

1.1 Safety messages

NOTICE

Read this manual before working with the product. For personal and system

safety, and for optimum product performance, ensure you thoroughly

understand the contents before installing, using, or maintaining this

product.

For technical assistance, contacts are listed below:

Customer Central

Technical support, quoting, and order-related questions.

•United States - 1-800-999-9307 (7:00 am to 7:00 pm CST)

•Asia Pacific- 65 777 8211

North American Response Center

Equipment service needs.

•1-800-654-7768 (24 hours a day — includes Canada)

•Outside of these areas, contact your local Emerson representative.

WARNING

Physical access

Unauthorized personnel may potentially cause significant damage to and/or

misconfiguration of end users’ equipment. This could be intentional or

unintentional and needs to be protected against.

Physical security is an important part of any security program and

fundamental to protecting your system. Restrict physical access by

unauthorized personnel to protect end users’ assets. This is true for all

systems used within the facility.

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WARNING

Failure to follow safe installation and servicing guidelines could result in

death or serious injury.

•Ensure the level switch is installed by qualified personnel and in

accordance with applicable code of practice.

•Use the level switch only as specified in this manual. Failure to do so may

impair the protection provided by the level switch.

Explosions could result in death or serious injury.

•In explosion-proof/flameproof, non-Incendive/type n, and dust ignition-

proof installations, do not remove the housing cover when power is

applied to the level switch.

•The housing cover must be fully engaged to meet flameproof/explosion-

proof requirements.

Electrical shock could cause death or serious injury.

•Avoid contact with the leads and terminals. High voltage that may be

present on leads can cause electrical shock.

•Ensure the power to the level switch is off, and the lines to any other

external power source are disconnected or not powered while wiring the

level switch.

•Ensure the wiring is suitable for the electrical current and the insulation is

suitable for the voltage, temperature, and environment.

Process leaks could result in death or serious injury.

•Ensure the level switch is handled carefully. If the process seal is

damaged, gas or dust might escape from the silo (or other vessel)

Any substitution of non-recognized parts may jeopardize safety. Repair,

e.g. substitution of components, etc. may also jeopardize safety and is

under no circumstances allowed.

•Unauthorized changes to the product are strictly prohibited as they may

unintentionally and unpredictably alter performance and jeopardize

safety. Unauthorized changes that interfere with the integrity of the

welds or flanges, such as making additional perforations, compromise

product integrity and safety. Equipment ratings and certifications are no

longer valid on any products that have been damaged or modified

without the prior written permission of Emerson. Any continued use of

product that has been damaged or modified without the written

authorization is at the customer’s sole risk and expense.

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CAUTION

The products described in this document are NOT designed for nuclear-

qualified applications.

•Using non-nuclear qualified products in applications that require

nuclear-qualified hardware or products may cause inaccurate readings.

•For information on Rosemount nuclear-qualified products, contact your

local Emerson Sales Representative.

Individuals who handle products exposed to a hazardous substance can

avoid injury if they are informed of and understand the hazard.

•If the product being returned was exposed to a hazardous substance as

defined by Occupational Safety and Health Administration (OSHA), a

copy of the required Safety Data Sheet (SDS) for each hazardous

substance identified must be included with the returned level switch.

1.2 Applications

A Rosemount™ 2535 Solids Level Switch is used for monitoring the level of

bulk materials in all types of containers and silos.

The level switch can be used with all powdery and granulated bulk materials

that have a density greater than 20 g/l (1.25 lb/ft3) and that do not show a

strong tendency to form crusts or deposits.

Typical applications are:

•Building materials

—Lime, extruded polystyrene foam (XPS), molding sand, etc.

•Food and beverage

—Milk powder, flour, salt, etc.

•Plastics

—Plastic granulates, etc.

•Timber

•Chemicals

The level switch has a threaded, flanged, or Tri Clamp process connection for

mounting it onto a silo (or other vessel). You can mount it on a side wall of

the silo, so that it is level with the filling limit to be monitored. Alternatively,

if it has an extended length, mount it vertically on top of a silo to monitor the

maximum filling limit.

The length of the rod can be up to 157.5 in. (4 m) with an extension tube.

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The use of a sliding sleeve is recommended so that the switching point can

be changed easily during the live operation of the level switch.

Figure 1-1: Typical Installation Examples

A. Rosemount 2535 with the tube-extended rod length

B. Rosemount 2535 with the tube-extended rod length and thermal tube-

extension

C. Rosemount 2535 with the standard length rod

D. Optional sliding sleeve

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1.3 Measurement principles

Using the principle of a tuning fork, a piezo-electric crystal oscillates the rod

at its natural frequency. Changes to the oscillation frequency are

continuously monitored by the electronics which varies depending on

whether the rod is covered or uncovered.

When the solids medium in the vessel (silo) falls away from the rod, it causes

a change of oscillation frequency that is detected by the electronics and the

output switches to indicate an 'uncovered' state.

When the solids medium in the vessel (silo) rises and covers the rod, it

causes a change of oscillation frequency that is detected by the electronics

and the output switches to indicate a 'covered' state.

The electrical output will vary depending on the electronics selected when

the Rosemount 2535 was ordered.

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Quick Start Guide 7

2 Mechanical installation

2.1 Mounting considerations

Before mounting the level switch on a silo (or other vessel), review the safety

and pre-mounting sections.

2.1.1 Safety

General safety

1. Installation of this equipment shall be carried out by suitably trained

personnel, in accordance with the applicable code of practice.

2. If equipment is likely to come into contact with aggressive

substances, it is the user’s responsibility to take suitable precautions

that prevent it from being adversely affected, thus ensuring the type

of protection is not compromised.

a. Aggressive substances: e.g. acidic liquids or gases that may

attack metals or solvents that may affect polymeric materials.

b. Suitable precautions: e.g. regular checks as part of routine

inspections or establishing from a material's data sheet that it

is resistant to specific chemicals.

3. It is the responsibility of the installer to:

a. Take protective measures, such as fitting an angled shield

(reverse V shape) to the silo or selecting an extension tube

option, when there are high mechanical forces.

b. Ensure that the process connection is tightened by the

correct amount of torque and sealed to prevent process

leaks.

4. Technical data

a. The Rosemount 2535 Product Data Sheet has all the technical

specifications. See Emerson.com/Rosemount for other

language versions.

Hazardous area safety

The Rosemount 2535 Product Certifications document has safety

instructions and control drawings for hazardous area installations. See

Emerson.com/Rosemount for other language versions.

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2.1.2 Mechanical load

The load at the mounting point must not exceed 180 Nm (Rosemount 2535

with an extended length fork).

Figure 2-1: Mechanical Load

A. Mounting point

B. Mechanical load

2.1.3 Vertical installations

Table 2-1 provides the maximum fork lengths and the corresponding

maximum deviations from a normal vertical installation.

Table 2-1: Maximum Vertical Deviation

Maximum deviation Maximum fork length

5° 157.5 in. (4000 mm)

45° 47.24 in. (1200 mm)

> 45° 23.62 in. (600 mm)

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2.1.4 Mounting location

Take time to assess a suitable mounting location. Avoid mounting the level

switch near the filling point, internal structures, and walls of a silo (or other

vessel). When mounting the extended length versions of the level switch, it

is especially important to consider internal structures. Forcing the level

switch into a small or congested space risks damage to the sensor and could

impair the protection it provides.

2.1.5 Sliding sleeve

Tighten both M8 screws with a torque of 20 Nm to establish a seal and

maintain the process pressure. See Figure 2-2.

Figure 2-2: Sliding Sleeve, M8 Screws

A. Two off M8 screws

2.1.6 Flange mounting

A suitable gasket must be fitted to provide a seal when the flanges are

tightened.

2.1.7 Tightening threaded process connections

When tightening the threaded process connection of a Rosemount 2535:

•Use an open-ended wrench on the hexagonal boss of the level switch or

the sliding sleeve.

•Never tighten by using the housing.

•Do not exceed the maximum torque of 80 Nm.

2.1.8 Hygienic applications

The food-grade materials are suitable for use under normal and predictable

hygienic applications (according to directive 1935/2004 Art.3). There are

currently no hygienic certifications for the Rosemount 2535.

2.1.9 Vibrating rod

Bending, shortening, or extending the rod will damage the level switch.

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10 Quick Start Guide

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