Rosemount Quick Start Guide: 2051 Pressure Transmitter and 2051CF Series Flowmeter with PROFIBUS PA | Rosemount Manuals & Guides

Quick Start Guide

00825-0400-4101, Rev DA

May 2021

Rosemount™ 2051 Pressure Transmitter
and Rosemount 2051CF Series Flow
Meter

with PROFIBUS® PA Protocol

Quick Start Guide May 2021

Safety messages

This guide provides basic guidelines for the Rosemount 2051HT Transmitter. It does not provide
instructions for configuration, diagnostics, maintenance, service, troubleshooting, Explosion-proof,
Flameproof, or intrinsically safe (I.S.) installations.

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.

WARNING

Explosions could result in death or serious injury.

Installation of this transmitter in an explosive environment must be in accordance with the appropriate
local, national, and international standards, codes, and practices. Review the approvals section of this
manual for any restrictions associated with a safe

• Before connecting a Field Communicator in an explosive atmosphere, ensure the instruments in

the loop are installed in accordance with intrinsically safe or non-incendive field wiring practices.

• In an explosion-proof/flameproof installation, do not remove the transmitter covers when power

is applied to the unit.

Process leaks may cause harm or result in death.

• Install and tighten process connectors before applying pressure.

• Do not attempt to loosen or remove flange bolts while the transmitter is in service.

Electrical shock can result in death or serious injury.

• Avoid contact with the leads and terminals. High voltage that may be present on leads can cause

electrical shock.

• Before connecting a handheld communicator in an explosive atmosphere, ensure the instruments

in the loop are installed in accordance with intrinsically safe or non-incendive field wiring
practices.

• In an Explosion-Proof/Flameproof installation, do not remove the transmitter covers when power

is applied to the unit.

Process leaks may cause harm or result in death.

• Install and tighten process connectors before applying pressure.

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.

2 Rosemount 2051 Pressure Transmitter and Rosemount 2051CF Series Flow Meter Quick Start Guide

May 2021 Quick Start Guide

WARNING

Replacement equipment or spare parts not approved by Emerson for use as spare parts could
reduce the pressure retaining capabilities of the transmitter and may render the instrument
dangerous.

• Use only bolts supplied or sold by Emerson as spare parts.

Improper assembly of manifolds to traditional flange can damage sensor module.

For safe assembly of manifold to traditional flange, bolts must break back plane of flange web (i.e., bolt
hole) but must not contact sensor module housing.

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.

Contents

Mount the transmitter..................................................................................................................5

Housing rotation........................................................................................................................ 12

Set jumpers and switches........................................................................................................... 13

Connect wiring and power up.....................................................................................................14

Basic configuration.....................................................................................................................18

Trim the transmitter...................................................................................................................21

Product certifications................................................................................................................. 22

Quick Start Guide 3

Quick Start Guide May 2021

4 Rosemount 2051 Pressure Transmitter and Rosemount 2051CF Series Flow Meter Quick Start Guide

May 2021 Quick Start Guide

1 Mount the transmitter

1.1 Liquid applications

Procedure

1. Place taps to the side of the line.

2. Mount beside or below the taps.

3. Mount the transmitter so the drain/vent valves are oriented upward.

1.2 Gas applications

Procedure

1. Place taps in the top or side of the line.

2. Mount beside or above the taps.

Quick Start Guide 5

Quick Start Guide May 2021

1.3 Steam applications

Procedure

1. Place taps to the side of the line.

2. Mount beside or below the taps.

3. Fill impulse lines with water.

6 Rosemount 2051 Pressure Transmitter and Rosemount 2051CF Series Flow Meter Quick Start Guide

May 2021 Quick Start Guide

Figure 1-1: Panel and Pipe Mounting

Panel mount

Coplanar flange

Traditional flange

(1)

Pipe mount

Rosemount 2051T

(1) × 1 panel bolts are customer supplied.

Quick Start Guide 7

A

4 × 1.75-in.

(44 mm)

D

4 × 1.75-in.

(44 mm)

4 × 2.25-in.

(57 mm)

C

4 × 1.75-in.

(44 mm)

4

× 1.50-in.

(38 mm)

B

4 × 2.88-in.

(73 mm)

Quick Start Guide May 2021

1.4 Bolting considerations

If the transmitter installation requires assembly of the process flanges,
manifolds, or flange adapters, follow the assembly guidelines to ensure a
tight seal for optimal performance characteristics of the transmitters. Use
only bolts supplied with the transmitter or sold by Emerson as spare parts.

Figure 1-2 illustrates common transmitter assemblies with the bolt length

required for proper transmitter assembly.

Figure 1-2: Common Transmitter Assemblies

A. Transmitter with coplanar flange
B. Transmitter with coplanar flange and optional flange adapters
C. Transmitter with traditional flange and optional flange adapters

D. Transmitter with coplanar flange and optional manifold and flange

adapters

Bolts are typically carbon steel (CS) or stainless steel (SST). Confirm the
material by viewing the markings on the head of the bolt and referencing

Table 1-1. If bolt material is not shown in Table 1-1, contact a local Emerson

representative for more information.

Carbon steel bolts do not require lubrication and the stainless steel bolts are
coated with a lubricant to ease installation. However, no additional lubricant
should be applied when installing either type of bolt.

Use the following bolt installation procedure:

Procedure

1. Tighten the bolts by hand.

2. Torque the bolts to the initial torque value using a crossing pattern.

8 Rosemount 2051 Pressure Transmitter and Rosemount 2051CF Series Flow Meter Quick Start Guide

See Table 1-1 for initial torque value.

B7M

316

316

316

SW

316

STM

316

R

B8M

May 2021 Quick Start Guide

3. Torque the bolts to the final torque value using the same crossing
pattern. See Table 1-1 for final torque value.

4. Verify the flange bolts are protruding through the sensor module
bolt holes before applying pressure.

Table 1-1: Torque Values for the Flange and Flange Adapter Bolts

Bolt material Head markings Initial torque Final torque

CS

SST

300 in-lb 650 in-lb

150 in-lb 300 in-lb

1.5 O-rings

The two styles of Rosemount flange adapters (Rosemount
3051/2051/2024/3095) each require a unique O-ring (see Figure 1-3). Use
only the O-ring designed for the corresponding flange adapter.

WARNING

Failure to install proper flange adapter O-rings may cause process leaks,
which can result in death or serious injury. The two flange adapters are
distinguished by unique O-ring grooves. Only use the O-ring that is designed
for its specific flange adapter, as shown below. When compressed, PTFE O­rings tend to cold flow, which aids in their sealing capabilities.

Quick Start Guide 9

Quick Start Guide May 2021

Figure 1-3: O-rings

A. Flange adapter
B. O-ring
C. PFTE based

D. Elastomer

Note

You should replace PTFE O-rings if you remove the flange adapter.

1.6 Environmental seal for housing

Thread sealing (PTFE) tape or paste on male threads of conduit is required to
provide a water/dust tight conduit seal and meets requirements of NEMA
Type 4X, IP66, and IP68. Consult factory if other Ingress Protection ratings
are required.

For M20 threads, install conduit plugs to full thread engagement or until
mechanical resistance is met.

®

1.7

10 Rosemount 2051 Pressure Transmitter and Rosemount 2051CF Series Flow Meter Quick Start Guide

In-line gage transmitter orientation

The low side pressure port (atmospheric reference) on the in-line gage
transmitter is located in the neck of the transmitter, behind the housing. The
vent path is 360° around the transmitter between the housing and sensor.
(See Figure 1-4.)

Keep the vent path free of any obstruction, including but not limited to
paint, dust, and lubrication by mounting the transmitter so fluids can drain
away.

A

May 2021 Quick Start Guide

Figure 1-4: In-line Gage Low Side Pressure Port

A. Pressure port location

Quick Start Guide 11

A

Quick Start Guide May 2021

2 Housing rotation

To improve field access to wiring or to better view the optional LCD display
follow the procedure steps.

Figure 2-1: Housing Rotation

A. Housing rotation set screw (5/64-in.)

Procedure

1. Loosen the housing rotation set screw using a 5/64 -in. hex wrench.

2. Rotate the housing clockwise to the desired location.

3. If the desired location cannot be achieved due to thread limit, rotate
the housing counterclockwise to the desired location (up to 360°
from thread limit).

4. Retighten the housing rotation set screw to no more than 7 in-lbs
when desired location is reached.

12 Rosemount 2051 Pressure Transmitter and Rosemount 2051CF Series Flow Meter Quick Start Guide