Emerson Rosemount 3051HT Manuel utilisateur

Quick Start Guide

00825-0100-4091, Rev DC

July2023

Rosemount™ 3051HT Hygienic

Pressure Transmitter

with 4–20 mA HART®

Contents

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

Transmitter installation...............................................................................................................5

Product certifications................................................................................................................ 19

Quick Start Guide July2023

2 Emerson.com/Rosemount

1 About this guide

This guide provides basic guidelines for Rosemount 3051HT

Hygienic Pressure Transmitter. It does not provide instructions for

configuration, diagnostics, maintenance, service, troubleshooting,

explosion-proof, flameproof, or Intrinsically Safe (IS) installations.

Refer to the Rosemount 3051 Pressure Transmitter Manual for more

instructions. This guide and the referenced manual are also available

on Emerson.com.

1.1 Safety messages

WARNING

Explosions

Explosions could result in death or serious injury.

Installation of device in an explosive environment must be in

accordance with appropriate local, national, and international

standards, codes, and practices. Review Product certifications for

any restrictions associated with a safe installation.

Before connecting a handheld communicator in an explosive

atmosphere, ensure that the instruments 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.

WARNING

Process leaks

Process leaks may cause harm or result in death.

To avoid process leaks, only use the O-ring designed to seal with

the corresponding flange adapter.

WARNING

Electrical shock

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.

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Quick Start Guide 3

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 in protecting your system. Restrict physical access by

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

all systems used within the facility.

NOTICE

Conduit/cable entries

Unless otherwise marked, the conduit/cable entries in the housing

enclosure use a ½–14 NPT form. Only use plugs, adapters, glands, or

conduit with a compatible thread form when closing these entries.

Entries marked “M20” are M20 × 1.5 thread form. On devices with

multiple conduit entries, all entries will have the same thread form.

When installing in a hazardous location, use only appropriately listed

or Ex certified plugs, glands, or adapters in cable/conduit entries.

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4 Emerson.com/Rosemount

2 Transmitter installation

2.1 Mount the transmitter

Before mounting, place the Rosemount 3051HT Hygienic Pressure

Transmitter to the desired orientation. When changing the

transmitter orientation, do not have the transmitter securely

mounted or clamped in place.

Conduit entry orientation

When installing a Rosemount 3051HT, Emerson recommends

installing it so that a conduit entry faces downward or parallel to the

ground. This is to maximize drainability when cleaning.

Environmental seal for housing

Thread sealing (PTFE) tape or paste on male threads of conduit is

required to provide a watertight/dustproof conduit seal and meet

requirements of NEMA® Type 4X, IP66, IP68, and IP69K. If other

Ingress Protection ratings are required, then consult the factory .

Note

IP69K rating only available on units with a Stainless Steel (SST)

housing and option code V9 in the model string.

For M20 threads, install conduit plugs to full thread engagement or

until mechanical resistance is met.

Inline gauge transmitter orientation

The low side pressure port (atmospheric reference) on the inline

gauge transmitter is located on the neck of the transmitter via a

protected gauge vent (See Figure 2-1).

Mount the transmitter so that the process can drain away. This will

keep the vent path free from obstructions including, but not limited

to, paint, dust, and viscous fluids.

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Quick Start Guide 5

Figure 2-1: Inline protected gauge vent low side pressure port

Aluminum Polished 316 SST

A. Low side pressure port (atmospheric reference)

Clamping

When installing a clamp, follow the recommended torque values

provided by the gasket manufacturer.

Note

To maintain performance, Emerson does not recommend torquing a

1.5" Tri-Clamp beyond 50 in-lb. on pressure ranges below 20 psi.

2.2 Set the switches

Before installation, set alarm and security switch configuration as

shown in Figure 2-2 and Figure 2-3.

•The alarm switch sets the analog output alarm to high or low.

Default alarm is high.

•The security switch allows ( ) or prevents ( ) any configuration of

the transmitter. Default security is off ( ).

To change the switch configuration:

Procedure

1. If the transmitter is installed, then secure the loop.

2. Remove power.

3. Remove the housing cover opposite the field terminal side.

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6 Emerson.com/Rosemount

WARNING

When the circuit is live in explosive atmospheres, do not

remove the instrument cover.

4. Using a small screwdriver, slide the security and alarm

switches into the preferred position.

5. Reattach the transmitter cover.

Note

To comply with:

Applicable ordinary location requirements, the covers must

only be capable of being released or removed with the aid of a

tool.

Explosion-proof requirements, the cover must be fully

engaged.

Figure 2-2: Transmitter electronics board - aluminum

Without LCD display With Local Operator Interface

(LOI) or LCD display

A. Alarm

B. Security

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Quick Start Guide 7

Figure 2-3: Transmitter electronics board - polished 316

Stainless Steel (SST)

Without LCD display With LOI or LCD display

A. Alarm

B. Security

2.3 Connect the wiring and power up

Figure 2-4: Transmitter wiring diagrams (4–20 mA) - aluminum

A. Minimize distance

B. Trim shield and insulate

C. Protective grounding terminal

D. Insulate shield

E. Connect shield back to the power supply ground

Quick Start Guide July2023

8 Emerson.com/Rosemount

Figure 2-5: Transmitter wiring diagrams (4–20 mA) - polished 316

Stainless Steel (SST)

A. Minimize distance

B. Trim shield and insulate

C. Protective grounding terminal

D. Insulate shield

E. Connect shield back to the power supply ground

Note

Use shielded twisted pair cables for best results.

Use 24 AWG or larger wire that does not exceed 5,000 ft. (1,500 m) in

length.

If applicable, install wiring with a drip loop. Arrange the drip loop so

the bottom is lower than the conduit connections and the transmitter

housing.

NOTICE

•Installation of the transient protection terminal block does not

provide transient protection unless the Rosemount 3051HT

Hygienic Pressure Transmitter case is properly grounded.

•Do not run signal wiring in conduit or open trays with power

wiring, or near heavy electrical equipment.

•Do not connect the powered signal wiring to the test terminals.

Power could damage the test diode in the terminal block.

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Quick Start Guide 9

Procedure

1. Remove the housing cover on the FIELD TERMINALS side.

2. Connect the positive lead to the “+” terminal (PWR/COMM) and

the negative lead to the “–” terminal.

3. Ensure full contact with terminal block screw and washer.

When using a direct wiring method, wrap wire clockwise to

ensure it is in place when tightening the terminal block screw.

NOTICE

Emerson does not recommend using a pin or a ferrule wire

terminal, as the connection may be more susceptible to

loosening over time or under vibration.

4. Ground housing to fulfill local grounding regulations.

Ensure proper grounding. It is important that the instrument

cable shield be:

•Trimmed close and insulated from touching the transmitter

housing.

•Connected to the next shield if cable is routed through a

junction box.

•Connected to a good earth ground at the power supply

end.

Note

If transient protection is needed, then refer to Grounding for

transient terminal block for grounding instructions.

5. Plug and seal unused conduit connections.

6. Reattach the transmitter covers.

Note

To comply with applicable ordinary locations requirements, the

covers must only be capable of being released or removed with the

aid of a tool.

To comply with explosion-proof requirements, the cover must be fully

engaged.

Quick Start Guide July2023

10 Emerson.com/Rosemount

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