Emerson Rosemount 2088 Manuale utente

Quick Start Guide

00825-0100-4690, Rev FD

September 2017

Rosemount™2088, 2090P, and 2090F

Pressure Transmitters

with 4–20 mA HART®and 1–5 Vdc HART Low Power

Protocol

00825-0100-4690_RevFD.fm Page 1 Wednesday, September 6, 2017 2:53 AM

September 2017

Quick Start Guide

NOTICE

This installation guide provides basic guidelines for the Rosemount 2088 and 2090 transmitters. It does not

provide instructions for configuration, diagnostics, maintenance, service, troubleshooting, Explosion-proof,

Flameproof, or intrinsically safe (I.S.) installations. Refer to the Rosemount 2088/2090 Reference Manual for

more instruction and low power output. This manual is also available electronically on

Emerson.com/Rosemount.

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 the Rosemount

2088/2090 Reference Manual for any restrictions associated with a safe installation.

Before connecting a HART-based communicator in an explosive atmosphere, make sure 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.

Use appropriately rated sanitary clamps and gaskets during installation.

The maximum working pressure of the clamp and gasket must be greater than or equal to the working

pressure range of the transmitter.

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.

Contents

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

Set the jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . 5

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

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

Trim the transmitter . . . . . . . . . . . . . . . . . . . . . . 9

Safety instrumented systems . . . . . . . . . . . . . 10

Product Certifications . . . . . . . . . . . . . . . . . . . . 13

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Quick Start Guide

September 2017

1.0 Mount the transmitter

1.1 Rosemount 2088

Mount directly to the impulse line without using an additional mounting bracket

or mount directly to a wall, panel, or two-inch pipe using an optional mounting

bracket.

1.2 Rosemount 2090P

Mount directly to the process pipe using an existing weld spud, or have a skilled

welder install a new weld spud using a TIG welder. Refer to Reference Manual for

complete welding instructions. Improper installation may result in weld spud

distortion. Recommended mounting in upright or horizontal position to allow

proper draining of vent.

1.3 Rosemount 2090F

Mount directly to the process pipe using a standard sanitary fitting (either a 1.5-

or 2-in. Tri Clamp connection). Recommended mounting in upright or horizontal

position to allow proper draining of vent.

Figure 1. Transmitter Direct Mounting

Do not apply torque directly to the electronics housing.

To avoid damage, apply torque only to the hex-shaped process

connection.

Rosemount 2088 Rosemount 2090P Rosemount 2090F

A. 1/2–14 NPT female process connection

B. Vessel wall

C. Weld spud

D. O-ring

E. 11/2- or 2-in. Tri Clamp connection

1.5 in.

1.0 in.

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Quick Start Guide

Figure 2. Panel and Pipe Mounting

1.7 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.

Panel mount Pipe mount

1.4 Liquid flow applications

1. Place taps to the side of the line.

2. Mount beside or below the taps.

1.5 Gas flow applications

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

2. Mount level or above the taps.

1.6 Steam flow applications

1. Place taps to the side of the line.

2. Mount beside or below the taps.

3. Fill impulse lines with water.

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Quick Start Guide

September 2017

1.8 Gage transmitter orientation

The low side pressure port (atmospheric reference) on the gage transmitters with

aluminum housings are 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 3.)

Keep the vent path free of any obstruction, including but not limited to paint,

dust, and lubrication by mounting the transmitter so that the process can drain

away.

Figure 3. Gage Low Side Pressure Port

A. Low side pressure port (atmospheric reference)

2.0 Set the jumpers

If alarm and security jumpers are not installed, the transmitter will operate

normally with the default alarm condition alarm high and the security off.

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. 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. Reposition the jumper. Avoid contact with the leads and the terminals. See

Figure 4 for the location of the jumper and the ON and OFF positions.

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Quick Start Guide

5. Reattach the transmitter cover. The cover must be fully engaged to comply

with explosion-proof requirements.

A. Alarm

B. Security

3.0 Connect the wiring and power

Use the following steps to wire the transmitter:

1. Remove the housing cover on the side marked field terminals.

2. Connect the positive lead to the “PWR/COMM+” terminal, and the negative

lead to the “–” terminal.

3. Ensure proper grounding. It is important that the instrument cable shield:

Be trimmed close and insulated from touching the transmitter housing

Be connected to the next shield if cable is routed through a junction box

Be connected to a good earth ground at the power supply end

Note

Installation of the transient protection terminal block does not provide transient protection

unless the Rosemount 2088 case is properly grounded.

Note

Do not connect the powered signal wiring to the test terminals. Power could damage the

test diode in the test connection. Twisted pair cable yields best results. For high EMI/RFI

environments, shielded twisted pair cable should be used. Use 24 AWG or larger wire and

do not exceed 5,000 ft. (1,500 m).

4. Plug and seal unused conduit connections.

Figure 4. Rosemount 2088 Transmitter Electronics Board

Without LCD display With LCD display

Low power without LCD display Low power with LCD display

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Quick Start Guide

September 2017

5. 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. Replace the housing cover.

Figure 5 and Figure 6 show wiring connections necessary to power a Rosemount

2088 Transmitter and enable communications with a hand-held Field

Communicator:

Figure 5. Bench Hook-up Wiring Diagrams (4–20 mA Transmitters)

A. RL≥250Ω

B. 24 Vdc supply

C. Current meter

Figure 6. Field Wiring for Rosemount 2088 — Low Power Option Code N

A. Voltmeter

B. Power supply

3.1 Power supply

The dc power supply (Option S: 10.5–42.4 V and Option N: 6–14 V) should

provide power with less than two percent ripple. The total resistance load is the

sum of the resistance of the signal leads and the load resistance of the controller,

indicator, and related pieces. The resistance of intrinsic safety barriers, if used,

must be included.

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Quick Start Guide

Figure 7. Maximum Loop Resistance = 43.5 ⫻(Power Supply Voltage – 10.5)

The Field Communicator requires a minimum loop resistance of 250Ωfor communication.

4.0 Verify configuration

A check () indicates the basic configuration parameters. At minimum, these

parameters should be verified as part of the configuration and startup procedure.

Function HART Fast Key sequence

Analog Output Alarm 1, 4, 3, 2, 4

Burst Mode Control 1, 4, 3, 3, 3

Burst Option 1, 4, 3, 3, 4

Calibration 1, 2, 3

Damping 1, 3, 5

Date 1, 3, 4, 1

Descriptor 1, 3, 4, 2

Digital To Analog Trim (4–20 mA Output) 1, 2, 3, 2, 1

Disable Local Span/Zero Adjustment 1, 4, 4, 1, 7

Field Device Info 1, 4, 4, 1

Keypad Input 1, 2, 3, 1, 1

Loop Test 1, 2, 2

Lower Range Value 4, 1

Lower Sensor Trim 1, 2, 3, 3, 2

Message 1, 3, 4, 3

Meter Type 1, 3, 6, 1

Number of Requested Preambles 1, 4, 3, 3, 2

Output Trim 1, 2, 3, 2

Percent Range 1, 1, 2

Poll Address 1, 4, 3, 3, 1

Range Values 1, 3, 3

Rerange 1, 2, 3, 1

Voltage (Vdc)

Load (Ohms)

Operating

region

1387

1000

500

10.5 20 30

42.4

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Quick Start Guide

September 2017

5.0 Trim the transmitter

Note

Transmitters are shipped fully calibrated per request or by the factory default of full scale

(span = upper range limit).

5.1 Zero trim

A zero trim is a single-point adjustment used for compensating mounting

position effects. If zero offset is less than 3 percent of true zero, follow the Using

the Field Communicator instructions below. If zero offset is greater than 3

percent of true zero, follow the Using the transmitter zero adjustment button

instructions below to rerange.

Using the Field Communicator

Using the transmitter zero adjustment button

Scaled D/A Trim (4–20 mA Output) 1, 2, 3, 2, 2

Self Test (Transmitter) 1, 2, 1, 1

Sensor Info 1, 4, 4, 2

Sensor Trim (Full Trim) 1, 2, 3, 3

Sensor Trim Points 1, 2, 3, 3, 5

Status 1, 2, 1, 2

Tag 1, 3, 1

Transmitter Security (Write Protect) 1, 3, 4, 4

Units (Process Variable) 1, 3, 2

Upper Range Value 5, 2

Upper Sensor Trim 1, 2, 3, 3, 3

Zero Trim 1, 2, 3, 3, 1

Fast Keys Steps

1, 2, 3, 3, 1

1. Vent the transmitter and connect Field Communicator.

2. At the menu, input the HART Fast Key sequence.

3. Follow the commands to perform a zero trim.

1. Loosen the certifications label screw and rotate the label to

expose the zero adjustment button.

2. Apply the desired pressure for the 4 mA output.

3. Set the 4 mA point by pressing the zero button for two

seconds. Verify that the output is 4 mA. The optional LCD

display will show “ZERO PASS”.

A. Zero adjustment button

Function HART Fast Key sequence

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September 2017

Quick Start Guide

6.0 Safety instrumented systems

The following section applies to Rosemount 2088 Transmitters used in SIS

applications.

Note

Transmitter output is not safety-rated during the following: configuration changes,

multidrop, loop test. Alternative means should be used to ensure process safety during

transmitter configuration and maintenance activities.

6.1 Installation

No special installation is required in addition to the standard installation practices

outlined in this document. Always ensure a proper seal by installing the

electronics housing cover(s) so that metal contacts metal.

The loop must be designed so the terminal voltage does not drop below 10.5 Vdc

when the transmitter output is 22.5 mA.

Position the security switch to the “ON” position to prevent accidental or

deliberate change of configuration data during normal operation.

6.2 Configuration

Use any HART-compliant master to communicate with and verify configuration of

the Rosemount 2088.

User-selected damping will affect the transmitters ability to respond to changes

in the applied process. The damping value + response time must not exceed the

loop requirements.

Note

DCS or safety logic solver must be configured to match transmitter configuration. Figure 8

identifies the two alarm levels available and their operation values. Position the alarm

switch to the required HI or LO alarm position.

Figure 8. Alarm Levels

Rosemount alarm level

Namur alarm level

1. Transmitter Failure, hardware alarm in LO position.

2. Transmitter Failure, hardware alarm in HI position.

Normal

Operation

4 mA 20 mA 20.8 mA

high saturation

21.75 mA(2)

3.9 mA

low saturation

3.75mA(1)

Normal

Operation

4 mA 20 mA 20.5 mA

high saturation

22.5 mA(2)

3.8 mA

low saturation

3.6 mA(1)

00825-0100-4690_RevFD.fm Page 10 Wednesday, September 6, 2017 2:53 AM

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