Rosemount 4088A MultiVariable Bedienungsanleitung

Quick Start Guide

00825-0100-4088, Rev AE

September 2016

Rosemount™4088A MultiVariable™Transmitter

with Modbus®Output Protocol

September 2016

Quick Start Guide

Procedures and instructions in this section may require special precautions to

ensure the safety of the personnel performing the operation. Information that raises

potential safety issues is indicated with a warning symbol ( ). Refer to the

following safety messages before performing an operation preceded by this

symbol.

NOTICE

This guide provides basic guidelines for the Rosemount 4088 MultiVariable Transmitter. It does not provide

instructions for diagnostics, maintenance, service, or troubleshooting. Reference the 4088 MultiVariable

Transmitter Reference Manual for more instruction. All documents are available electronically at

EmersonProcess.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 4088

MultiVariable Transmitter Reference Manual for any restrictions associated with a safe installation.

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.

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.

Conduit/cable entries

Unless marked, the conduit/cable entries in the transmitter housing use a 1/2–14 NPT thread form. Entries

marked “M20” are M20 ⫻1.5 thread form. On devices with multiple conduit entries, all entries will have the

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

these entries.

When installing in a hazardous location, use only appropriately listed or Ex certified plugs, adapters, or

glands in cable/conduit entries.

Contents

Steps required for quick installation . . . . . . . . 3

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

Consider housing rotation . . . . . . . . . . . . . . . . 8

Set the switches . . . . . . . . . . . . . . . . . . . . . . . . . 9

Wiring and power up . . . . . . . . . . . . . . . . . . . . 10

Verify device configuration . . . . . . . . . . . . . . . 15

Trim the transmitter . . . . . . . . . . . . . . . . . . . . . 18

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

Quick Start Guide

September 2016

1.0 Steps required for quick installation

2.0 Mount the transmitter

Start >

Mount the transmitter

Consider housing rotation

Set the switches

Wiring and power up

Verify device configuration

Trim the transmitter

> Finish

2.1 Liquid flow applications

1. Place taps to the side of the line.

2. Mount beside or below the taps.

3. Mount the transmitter so that the

drain/vent valves are oriented

upward.

2.2 Gas flow applications

1. Place taps in the top or side of the

line.

2. Mount beside or above the taps.

September 2016

Quick Start Guide

2.3 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.

Quick Start Guide

September 2016

2.4 Mounting brackets

Figure 1. Coplanar Flange

Figure 2. Traditional Flange

Figure 3. In-Line Flange

Panel mount Pipe mount

September 2016

Quick Start Guide

2.5 Bolting considerations

If the transmitter installation requires assembly of a process flange, manifold, or

flange adapters, follow these assembly guidelines to ensure a tight seal for

optimal performance characteristics of the transmitter. Only use bolts supplied

with the transmitter or sold by Emerson Process Management as spare parts.

Figure 4 on page 6 illustrates common transmitter assemblies with the bolt

length required for proper transmitter assembly.

Figure 4. 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 Rosemount Conventional Manifold and

flange adapters

Note

For all other manifolds, contact Customer Central technical support.

Bolts are typically carbon steel or stainless steel. Confirm the material by viewing

the markings on the head of the bolt and referencing Table 1. If bolt material is

not shown in Table 1, contact the local Emerson Process Management

representative for more information.

Use the following bolt installation procedure:

1. 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.

4 ⫻1.75-in. (44 mm)

4 ⫻2.88-in. (73 mm)

A B

4 ⫻1.75-in. (44 mm)

4 ⫻1.50-in. (38 mm)

4 ⫻2.25-in. (57 mm)

4 ⫻1.75-in. (44 mm)

Quick Start Guide

September 2016

2. Finger-tighten the bolts.

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

Table 1 for initial torque value.

4. Torque the bolts to the final torque value using the same crossing pattern. See

Table 1 for final torque value.

5. Verify the flange bolts are protruding through the sensor module before

applying pressure (see Figure 5).

Table 1. Torque Values for Flange and Flange Adapter Bolts

Figure 5. Proper Bolt Installation

A. Bolt B. Sensor module

2.6 O-rings with flange adapters

Failure to install proper flange adapter O-rings may cause process leaks, which can result in death or serious

injury. Only use the O-ring that is designed for its specific flange adapter.

Whenever the flange or adapters are removed, visually inspect the O-rings. Replace them if there are any signs

of damage, such as nicks or cuts. If the O-rings are replaced, re-torque the flange bolts and alignment screws

after installation to compensate for seating of the O-rings.

Bolt material Head markings Initial torque Final torque

Carbon Steel (CS) 300 in-lb 650 in-lb

Stainless Steel (SST) 150 in-lb 300 in-lb

B7M

316

STM

316

B8M

A. Flange adapter

B. O-ring

C. PTFE based profile is square

D. Elastomer profile is round

September 2016

Quick Start Guide

2.7 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.

2.8 In-line gage transmitter orientation

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

transmitter is located under the sensor module neck label. (See Figure 6.)

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

dust, and lubrication by mounting the transmitter so that any contaminants can

drain away.

Figure 6. In-Line Gage Transmitter

A. Low side pressure port (under neck label)

3.0 Consider housing rotation

To improve field access to wiring or to better view the optional LCD display:

1. Loosen the housing rotation set screw.

2. Turn the housing up to 180° left or right of its original (as shipped) position.

3. Re-tighten the housing rotation set screw.

Figure 7. Transmitter Housing Set Screw

A. LCD display B. Housing rotation set screw (3/32-in.)

Quick Start Guide

September 2016

Note

Do not rotate the housing more than 180° without first performing a disassembly

procedure [reference Rosemount 4088 MultiVariable Transmitter Reference Manual for

more information]. Over-rotation may sever the electrical connection between the sensor

module and the electronics.

3.1 Rotate the LCD display

Transmitters ordered with the LCD display will be shipped with the display

installed.

In addition to housing rotation, the optional LCD display can be rotated in

90-degree increments by squeezing the two tabs, pulling out, rotating and

snapping back into place.

If LCD display pins are inadvertently removed from the interface board, carefully

re-insert the pins before snapping the LCD display back into place.

Use the following procedure and Figure 8 to install the LCD display:

1. If the transmitter is installed in a loop, then secure the loop and disconnect

power.

2. Remove the transmitter cover opposite the field terminal side. Do not remove

the instrument covers in explosive environments when the circuit is live.

3. Engage the four-pin connector into the LCD display and snap into place.

4. Install the meter cover and tighten to ensure metal to metal contact.

Figure 8. Optional LCD Display

A. LCD display B. Meter cover

4.0 Set the switches

The transmitter’s default configuration for the AC Termination is in the off

position. The transmitter’s default configuration for the security switch is in the

off position.

1. If the transmitter is installed, secure the bus and remove power.

2. Remove the housing cover opposite the field terminals side. Do not remove

the housing cover in explosive environments.

September 2016

Quick Start Guide

3. Slide the security and AC Termination switches into the preferred position by

using a small screwdriver. Note that the security switch will need to be in the

off position in order to make any configuration changes.

4. Reinstall the housing cover and tighten so that the cover is fully seated with

metal to metal contact between the housing and cover in order to meet

explosion proof requirements.

Figure 9. Transmitter Switch Configuration

A. Security B. AC termination

5.0 Wiring and power up

Use the following steps to wire the transmitter:

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

2. Set up based on optional process temperature input.

a. If the optional process temperature input is being utilized, follow the

procedure “Install optional process temperature input (Pt 100 RTD Sensor)”

on page 13.

b. If there will not be an optional temperature input, plug and seal the unused

conduit connection.

3. Connect the transmitter to the RS-485 bus as shown in Figure 10.

a. Connect the A lead to the “A” terminal.

b. Connect the B lead to the “B” terminal.

4. Connect the positive lead from the power source to the “PWR +” terminal, and

the negative lead to the “PWR –” terminal.

Note

The Rosemount 4088 MultiVariable Transmitter uses RS-485 Modbus with 8 data bits, one

stop bit and no parity. The default baud rate is 9600.

Note

Twisted pair wiring is required for RS-485 bus wiring. Wiring runs under 1000 ft (305 m)

should be AWG 22 or larger. Wiring runs from 1000 to 4000 feet (305 to 1219 m) should be

AWG 20 or larger. Wiring should not exceed AWG 16.

5. 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.

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