Emerson Rosemount 3051HT Manuale utente

Quick Start Guide

00825-0100-4091, Rev DB

April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 April2023

2 Emerson.com/Rosemount

1 About this guide

This guide provides basic guidelines for Rosemount 3051

Transmitters. It does not provide instructions for configuration,

diagnostics, maintenance, service, troubleshooting, Explosion-Proof,

Flame-Proof, or intrinsically safe (I.S.) installations. Refer to the

Rosemount 3051 Manual for more instructions. This guide is also

available electronically on Emerson.com/Rosemount.

1.1 Safety messages

DANGER

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.

DANGER

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.

DANGER

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.

April2023 Quick Start Guide

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.

CAUTION

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.

Quick Start Guide April2023

4 Emerson.com/Rosemount

2 Transmitter installation

2.1 Mount the transmitter

Place the transmitter to the desired orientation before mounting.

Transmitter must not be securely mounted or clamped in place when

changing transmitter orientation.

Conduit entry orientation

When installing a Rosemount 3051HT, it is recommended installing

so a conduit entry faces downward or parallel to the ground 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 meets

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

factory if other Ingress Protection ratings are required.

Note

IP69K rating only available on units with a 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.

In-line gauge transmitter orientation

The low side pressure port (atmospheric reference) on the in-line

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

protected gage vent (See Figure 2-1).

Keep the vent path free from obstructions including but not limited

to paint, dust, and viscous fluids by mounting the transmitter so the

process can drain away.

April2023 Quick Start Guide

Quick Start Guide 5

Figure 2-1: In-line Protected Gage Vent Low Side Pressure Port

Aluminum Polished 316 SST

A. Low side pressure port (atmospheric reference)

Clamping

When installing clamp, follow recommended torque values provided

by gasket manufacturer.

Note

To maintain performance, torquing a 1.5-in. Tri Clamp beyond 50

in-lb. is not recommended on pressure ranges below 20 psi.

2.2 Set the switches

Prerequisites

Set alarm and security switch configuration before installation 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 ( ).

Use the following procedure to change the switch configuration:

Quick Start Guide April2023

6 Emerson.com/Rosemount

Procedure

1. If the transmitter is installed, secure the loop, and remove

power.

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

Do not remove the instrument cover in explosive atmospheres

when the circuit is live.

3. Slide the security and alarm switches into the preferred

position using a small screwdriver.

4. Reattach the transmitter cover.

•The covers must only be capable of being released or

removed with the aid of a tool to comply with applicable

ordinary locations requirements.

•The cover must be fully engaged to comply with explosion-

proof requirements.

Figure 2-2: Transmitter Electronics Board - Aluminum

Without LCD display With LOI or LCD display

A. Alarm

B. Security

April2023 Quick Start Guide

Quick Start Guide 7

Figure 2-3: Transmitter Electronics Board - Polished 316 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 April2023

8 Emerson.com/Rosemount

Figure 2-5: Transmitter Wiring Diagrams (4–20 mA) - Polished 316

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

Shielded twisted pair cable should be used 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.

CAUTION

•Installation of the transient protection terminal block does not

provide transient protection unless the Rosemount 3051HT 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.

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.

April2023 Quick Start Guide

Quick Start Guide 9

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.

Note

The use of a pin or a ferrule wire terminal is not recommended

as the connection may be more susceptible to loosening over

time or under vibration.

4. Ground housing to fulfill local grounding regulations.

5. 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

6. If transient protection is needed, refer to section Grounding

for transient terminal block for grounding instructions.

7. Plug and seal unused conduit connections.

8. Reattach the transmitter covers.

•The covers must only be capable of being released or

removed with the aid of a tool to comply with applicable

ordinary locations requirements.

•The cover must be fully engaged to comply with explosion-

proof requirements.

Quick Start Guide April2023

10 Emerson.com/Rosemount

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