Rosemount Quick Start Guide: Rosemount 2051HT Hygienic Pressure Transmitter with 4-20mA HART Manuals & Guides

Quick Start Guide

00825-0100-4591, Rev BA

March 2018

Rosemount™ 2051HT Hygienic Pressure
Transmitter

with 4–20 mA HART® Revision 5 and 7 Protocol

Note

Before installing the transmitter, confirm the correct device driver is loaded on the host
systems. See page 3 for system readiness.

Quick Start Guide

March 2018

NOTICE

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.

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.

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

Process leaks may cause harm or result in death.

To avoid process leaks, only use the gasket designed to seal with the corresponding flange adapter.

Electrical shock can result in death or serious injury.

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

Conduit/cable entries

 Aluminum housings: Unless marked, the conduit/cable entries in the transmitter housing use a 1/2–14 NPT

thread form.

 Stainless steel (SST) housings: conduit/cable entries can be determined by crossing referencing the model

string printed on the transmitter with the ordering table listed in the Pro duct Data Sheet. Conduit type is
not cast into the transmitter housing to minimize surface irregularities.

 Only use plugs, adapters, glands, or conduit with a compatible thread form when closing these entries.

®

-based communicator in an explosive atmosphere, make sure the instruments in

4

Contents

System readiness . . . . . . . . . . . . . . . . . . . . . . . . . 3

Transmitter installation . . . . . . . . . . . . . . . . . . . 3

Mount the transmitter . . . . . . . . . . . . . . . . . . . . 3

Set the switches . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2

Connect the wiring and power up . . . . . . . . . . 6

Verify configuration . . . . . . . . . . . . . . . . . . . . . . 8

Trim the transmitter . . . . . . . . . . . . . . . . . . . . . 11

Product certifications . . . . . . . . . . . . . . . . . . . . 14

March 2018

1.0 System readiness

1.1 Confirm HART Revision capability

 If using HART based control or asset management systems, confirm the

HART capability of those systems prior to transmitter installation. Not all
systems are capable of communicating with HART Revision 7 protocol. This
transmitter can be configured for either HART Revision 5 or 7.

 For instructions on how to change the HART Revision of your transmitter, see

page 11.

Quick Start Guide

1.2 Confirm correct device driver

 Verify the latest device driver (DD/DTM

ensure proper communications.

 Download the latest device driver at Emerson.com or FieldCommGroup.org.

Rosemount 2051 device revisions and drivers

Table 1 provides the information necessary to ensure you have the correct

device driver and documentation for your device.

Table 1. Rosemount 2051 Device Revisions and Files

Identify device Find device driver

Software

release

date

Dec-11 1.0.0 01

1. NAMUR software revision is located on the hardware tag of the device. In accordance with NE53,
revisions of the least significant level X (of 1.0.X) do not change functionalit y or operation of the
device and will bot be reflected in this device revision histor y.

2. HART software revision can be read using a HART capable configuration tool.

NAMUR

software

revision

(1)

HART

software

revision

HART

universal

(2)

revision

7 10 Rosemou nt

5 9

2.0 Transmitter installation

™

) is loaded on your systems to

Device

revision

Review
instruction

Referen ce

manual

2051

Pressure

Tra ns mi tte r

Reference

Manual

Review

functionality

Changes to

software

N/A

2.1 Mount the transmitter

Orient the transmitter to 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 2051HT, it is recommended installing so the
conduit entry faces downward towards the ground to maximize drain ability
when cleaning.

3

Quick Start Guide

A

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
4X, IP66, IP68, and IP69K. 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.

Note

IP69K rating only available on units with a SST housing and option code V9 in the model
string.

Note

For aluminum housings ordered with M20 conduit entries, transmitters shipped will have

1

/2 NPT threads machined into the housing and a 1/2 NPT to M20 thread adapter will be
provided. Considerations for environmental sealing listed above should be taken into
account when installing the thread adapter.

In-line gage 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 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.

Recommended installations have a conduit entry facing the ground so the gage
vent is pointing parallel to the ground.

March 2018

®

Type

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

Aluminum Polished 316 SST

A. Low side pressure port (atmospheric reference)

4

March 2018

A

B

Clamping

When installing clamp, follow recommended torque values provided by gasket
manufacturer.

(1)

2.2 Set the switches

Set alarm and security switch configuration before installation as shown in

Figure 2.

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

- Default alarm is high.

 The security switch allows (unlocked symbol) or prevents (locked symbol)

any configuration of the transmitter.

- Default security is off (unlocked symbol).

Use the following procedure to change the switch configuration:

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. It is recommended that the cover be

tightened until there is no gap between the cover and the housing.

The covers must only be capable of being released or removed with the aid
of a tool to comply with applicable ordinary locations requirements.

Quick Start Guide

Figure 2. Transmitter Electronics Board

Without LCD display With LOI or LCD display

A. Alarm
B. Security

1. To maintain transmitter performance, torquing a 1.5-in. Tri-Clamp beyond 50 in-lb is not recommended on pressure
ranges below 20 psi.

Aluminum

Polished 316 SST

A

B

5

Quick Start Guide

2.3 Connect the wiring and power up

Figure 3. Transmitter Wiring Diagrams (4–20 mA)

Aluminum

March 2018

A

B

A

B

A. 24 Vdc supply
B. R

≥ 250

L

C. Current meter (optional)

C

Polished 316 SST

C

Shielded twisted pair cable should be used for best results. Use 24 AWG or larger
wire that does not exceed 5,000 ft. (1500 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.

6