Emerson Rosemount 2120 Bedienungsanleitung

Quick Start Guide

00825-0100-4030, Rev GB

March 2022

Rosemount™ 2120 Level Switch

Vibrating Fork

Contents

About this guide...........................................................................................................................3

Installation................................................................................................................................... 5

Prepare the electrical connections..............................................................................................11

Connect wiring and power up.....................................................................................................26

Configuration.............................................................................................................................30

Operation...................................................................................................................................32

Quick Start Guide March 2022

2 Rosemount 2120 Level Switch

1 About this guide

This Quick Start Guide provides basic guidelines for the Rosemount 2120.

Refer to the Rosemount 2120 Reference Manual for more instructions. The

manual and this guide are also available electronically at

Emerson.com/Rosemount.

1.1 Safety messages

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.

The weight of a level switch with a heavy flange and extended fork length

may exceed 37 lb. (18 kg). A risk assessment is required before carrying,

lifting, and installing the level switch.

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

under no circumstances allowed.

WARNING

Explosions could result in death or serious injury.

Verify the operating atmosphere of the level switch is consistent with the

appropriate hazardous locations certifications.

Before connecting a handheld communicator in an explosive atmosphere,

ensure the instruments are installed in accordance with intrinsically safe or

non-incendive field wiring practices.

In explosion-proof/flameproof and non-incendive 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.

March 2022 Quick Start Guide

Quick Start Guide 3

WARNING

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.

WARNING

Process leaks could result in death or serious injury.

Ensure the level switch is handled carefully. If the process seal is damaged,

gas might escape from the vessel (tank) or pipe.

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.

CAUTION

Hot surfaces

The flange and process seal may be hot at high process temperatures. Allow

to cool before servicing.

Quick Start Guide March 2022

4 Rosemount 2120 Level Switch

2 Installation

2.1 Fork alignment in a pipe installation

The fork is correctly aligned by positioning the groove or notch as indicated

(Figure 2-1).

Figure 2-1: Correct Fork Alignment for Pipe Installation

A. Tri Clamp process connections have a circular notch

B. Threaded process connections have a groove

2.2 Fork alignment in a vessel (tank) installation

The fork is correctly aligned by positioning the groove or notch as indicated

(Figure 2-2).

Figure 2-2: Correct Fork Alignment for Vessel (Tank) Installation

OK OK

A. Tri Clamp process connections have a circular notch

B. Threaded process connections have a groove

C. Flanged process connections have a circular notch

March 2022 Quick Start Guide

Quick Start Guide 5

2.3 Mounting the threaded version

2.3.1 Threaded vessel (tank) or pipework connection

Procedure

1. Seal and protect the threads. Use anti-seize paste or PTFE tape

according to site procedures.

A gasket may be used as a sealant for BSPP (G) threaded connections.

2. Screw the level switch into the process connection.

Note

Tighten using the hexagon nut only.

Figure 2-3: Vertical Installation

A. Gasket for BSPP (G) threaded connection

Figure 2-4: Horizontal Installation

A. Gasket for BSPP (G) threaded connection

Quick Start Guide March 2022

6 Rosemount 2120 Level Switch

2.3.2 Threaded flange connection

Procedure

1. Place the customer-supplied flange and gasket on the vessel (tank)

nozzle.

A. Gasket (customer supplied)

2. Tighten the bolts and nuts with sufficient torque for the flange and

gasket.

3. Seal and protect the threads. Use anti-seize paste or PTFE tape

according to site procedures.

A gasket may be used as a sealant for BSPP (G) threaded connections.

March 2022 Quick Start Guide

Quick Start Guide 7

4. Screw the level switch into the flange thread.

Note

Tighten using the hexagon nut only.

A. Gasket for BSPP (G) threaded connection

2.4 Mounting the flanged version

Procedure

1. Lower the level switch into the nozzle.

A. Gasket (customer supplied)

Quick Start Guide March 2022

8 Rosemount 2120 Level Switch

2. Tighten the bolts and nuts with sufficient torque for the flange and

gasket.

2.5 Mounting the Tri Clamp version

Procedure

1. Lower the level switch into the flange face.

A. Seal (supplied with Tri Clamp)

March 2022 Quick Start Guide

Quick Start Guide 9

2. Fit the Tri Clamp.

Quick Start Guide March 2022

10 Rosemount 2120 Level Switch

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