Rosemount 248 User manual

www.rosemount.com

¢00825-0100-4825[¤

HART

Quick Installation Guide

00825-0100-4825, Rev CA

February 2006

Rosemount 248

Rosemount 248 Transmitter and

Temperature Monitoring Assembly

Step 1: Configure (Bench Calibration)

Step 2: Mount the Transmitter

Step 3: Software Installation (248C only)

Step 4: Connect the Wiring

Step 5: Perform a Loop Test

Product Certifications

248C License Agreement

Start

Power Up Transmitter

Check Process Connections

Confirm Configuration

Loop Test

End

Safety Instrumented System

00825-0100-4825.fm Page 1 Wednesday, February 8, 2006 1:53 PM

Quick Installation Guide

00825-0100-4825, Rev CA

February 2006

Rosemount 248

IMPORTANT NOTICE

This installation guide provides basic guidelines for the

Rosemount

248. It does not provide instructions for detailed

configuration, diagnostics, maintenance, service, troubleshooting,

or installations. Refer to the Rosemount 248 reference manual

(document number 00809-0100-4825) for more instruction. The

manual and this QIG are also available electronically on

www.rosemount.com.

WARNING

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. Please review the Hazardous

Locations Certifications for any restrictions associated with a safe

installation. In an Explosion-proof/Flame-proof 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 thermowells or sensors before applying

pressure.

• Do not remove the thermowell while in operation.

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.

Emerson Process

Management

Rosemount Inc.

8200 Market Boulevard

Chanhassen, MN USA

55317

T (US) (800) 999-9307

T (Intnl) (952) 906-8888

F (952) 949-7001

Emerson Process

Management Shared

Services Ltd.

Heath Place

West Sussex PO22 9SH

England

T 44 (1243) 863 121

F 44 (1243) 867 554

Emerson Process

Management Asia Pacific

Private Limited

1 Pandan Crescent

Singapore 128461

T (65) 6777 8211

F (65) 6777 0947

Enquiries@AP.EmersonProcess.com

00825-0100-4825.fm Page 2 Wednesday, February 8, 2006 1:53 PM

Quick Installation Guide

00825-0100-4825, Rev CA

February 2006

Rosemount 248

TEP

1: C

ONFIGURE

ENCH

ALIBRATION

)

The Rosemount 248 communicates using the 375 Field

Communicator (communication requires a loop resistance between

250 and 1100 ohms. Do not operate when power is below 12Vdc at

the transmitter terminal). Refer to the Rosemount 248 Reference

Manual (document number 00809-0100-4825) and the 375 Field

Communicator Reference Manual

(http://www.fieldcommunicator.com/suppmanu.htm) for more

information.

Connecting a HART Communicator

The Hand-held Communicator Field Device Revision Dev v1, DD v1 is

required for complete functionality.

Figure 1. Connecting a Communicator to a Bench Loop

Verify Transmitter Configuration

From the Home Screen, enter the HART Fast Keys listed below to

verify if the transmitter is configured correctly. This table contains the

minimum functions required for configuration. Refer to the Rosemount

248 Reference Manual (document number 00809-0100-4825) for a

complete list.

Communicator Functions HART Fast Keys

Sensor 1 Setup 1, 3, 2, 1, 2

Sensor Type 1, 3, 2, 1, 1

LRV (Lower Range Value) 1, 1, 6

URV (Upper Range Value) 1, 1, 7

250



≤

1100



Power Supply

HART Communicator

Rosemount 248 Transmitter

00825-0100-4825.fm Page 3 Wednesday, February 8, 2006 1:53 PM

Quick Installation Guide

00825-0100-4825, Rev CA

February 2006

Rosemount 248

TEP

2: M

OUNT

THE

RANSMITTER

Mount the transmitter at a high point in the conduit run to prevent

moisture from draining into the transmitter housing.

Typical European and Asia Pacific Installation

Head Mount Transmitter with DIN Plate Style Sensor

1. Attach the thermowell to the pipe or process container wall. Install

and tighten the thermowell before applying process pressure.

2. Assemble the transmitter to the sensor. Push the transmitter

mounting screws through the sensor mounting plate and insert the

snap rings (optional) into the transmitter mounting screw groove.

3. Wire the sensor to the transmitter.

4. Insert the transmitter-sensor assembly into the connection head.

Thread the transmitter mounting screw into the connection head

mounting holes. Assemble the extension to the connection head.

Insert the assembly into the thermowell.

5. Slip the shielded cable though the cable gland

6. Attach a cable gland into the shielded cable.

7. Insert the shielded cable leads into the connection head through

the cable entry. Connect and tighten the cable gland.

8. Connect the shielded power cable leads to the transmitter power

terminals. Avoid contact with sensor leads and sensor connections.

9. Install and tighten the connection head cover. Enclosure covers

must be fully engaged to meet explosion-proof requirements.

A = Rosemount 248 Transmitter D = Transmitter Mounting Screws

B = Connection Head E = Integral Mount Sensor with Flying Leads

C = Thermowell F = Extension

00825-0100-4825.fm Page 4 Wednesday, February 8, 2006 1:53 PM

Quick Installation Guide

00825-0100-4825, Rev CA

February 2006

Rosemount 248

TEP

CONTINUED

...

Typical North and South American Installation

Head Mount Transmitter with Threaded Sensor

1. Attach the thermowell to the pipe or process container wall. Install

and tighten thermowells before applying process pressure.

2. Attach necessary extension nipples and adapters to the

thermowell. Seal the nipple and adapter threads with silicone tape.

3. Screw the sensor into the thermowell. Install drain seals if required

for severe environments or to satisfy code requirements.

4. Pull the sensor wiring leads through the universal head and

transmitter. Mount the transmitter in the universal head by

threading the transmitter mounting screws into the universal head

mounting holes.

5. Mount the transmitter-sensor assembly into the thermowell. Seal

adapter threads with silicone tape.

6. Install conduit for field wiring to the conduit entry of the universal

head. Seal conduit threads with silicone tape.

7. Pull the field wiring leads through the conduit into the universal

head. Attach the sensor and power leads to the transmitter. Avoid

contact with other terminals.

8. Install and tighten the universal head cover. Enclosure covers must

be fully engaged to meet explosion-proof requirements.

A = Threaded Thermowell D = Universal Head

B = Threaded Style Sensor E = Conduit Entry

C = Standard Extension

00825-0100-4825.fm Page 5 Wednesday, February 8, 2006 1:53 PM

Quick Installation Guide

00825-0100-4825, Rev CA

February 2006

Rosemount 248

TEP

CONTINUED

...

Mounting to a DIN Rail

Rail Mount Transmitter with Remote Mount Sensor

The least complicated assembly uses:

• a remote mounted transmitter

• an integral mount sensor with terminal block

• an integral style connection head

• a standard extension

• a threaded thermowell

Refer to the Metric Product Data Sheet (document number

00813-0101-2654) for complete sensor and mounting accessory

information.

To complete the assembly, follow the procedure described below.

1. Attach the transmitter to a suitable rail or panel.

2. attach the thermowell to the pipe or process container wall. Install

and tighten the thermowell before applying pressure.

3. Attach the sensor to the connection head and mount the entire

assembly to the thermowell.

4. Attach sufficient lengths of sensor lead wire to the sensor terminal

block.

5. Attach and tighten the connection head cover. Enclosure covers

must be fully engaged to meet explosion-proof requirements.

To attach the Rosemount 248H to

a DIN rail, assemble the

appropriate rail mounting kit (part

number 00248-1601-0001) to the

transmitter as shown.

Transmitter

Mounting Hardware

Rail Clip

00825-0100-4825.fm Page 6 Wednesday, February 8, 2006 1:53 PM

Quick Installation Guide

00825-0100-4825, Rev CA

February 2006

Rosemount 248

TEP

CONTINUED

...

6. Run sensor lead wires from the sensor assembly to the transmitter.

7. Attach the sensor and power leads to the transmitter. Avoid contact

with leads and terminals.

Rail Mount Transmitter with Threaded Sensor

The least complicated assembly uses:

• a threaded sensor with flying heads

• a threaded sensor connection head

• a union and nipple extension assembly

• a threaded thermowell

Refer to Volume 1 of the Rosemount Sensors Product Data Sheet

(document number 00813-0100-2654) for complete sensor and

mounting accessory information.

To complete the assembly, follow the procedure described below.

1. Attach the transmitter to a suitable rail or panel.

Integral Mount Sensor with

Terminal Block

Connection Head

Standard Extension

Threaded Thermowell

Rail Mount Transmitter

Sensor Leads with

Cable Gland

00825-0100-4825.fm Page 7 Wednesday, February 8, 2006 1:53 PM

Quick Installation Guide

00825-0100-4825, Rev CA

February 2006

Rosemount 248

TEP

CONTINUED

...

2. Attach the thermowell to the pipe or process container wall. Install

and tighten the thermowell before applying pressure.

3. Attach necessary extension nipples and adaptors. Seal the nipple

and adapter threads with silicone tape.

4. Screw the sensor into the thermowell. Install drain seals if required

for severe environments or to satisfy code requirements.

5. Screw the connection head to the sensor.

6. Attach the sensor lead wires to the connection head terminals.

7. Attach additional sensor lead wires from the connection head to the

transmitter.

8. Attach and tighten the connection head cover. Enclosure covers

must be fully engaged to meet explosion-proof requirements.

9. Attach the sensor and power leads to the transmitter. Avoid contact

with leads and terminals.

Rail Mount

Transmitter Threaded Sensor

Connection Head Threaded Style

Sensor Standard

Extension Threaded

Thermowell

00825-0100-4825.fm Page 8 Wednesday, February 8, 2006 1:53 PM

Quick Installation Guide

00825-0100-4825, Rev CA

February 2006

Rosemount 248

TEP

3: S

OFTWARE

NSTALLATION

(248C

ONLY

)

1. Install the 248C software

• Place the 248C CD-ROM in the drive

• Run setup.exe from Windows NT, 2000, or XP

2. HART interface Box (248C1 option): Connect the HART Interface

Box to PC and 248 transmitter per instructions located on the

HART Interface Box label

3. Install Serial HART modem (248C2 option) or USB HART modem

(248C3 option). Please see instructions accompanying modem

hardware.

4. For USB modem (248C3 option): Upoin first use, configure

appropriate COM ports within 248C software by selecting “Port

Settings” from the “Communicate” menu. The USB modem driver

emulates a COM port and will add to available port selections in the

software’s drop-down box. Otherwise software defaults to first

available COM port, which may not be correct.

TEP

4: C

ONNECT

IRING

• Wiring diagrams are located on the top label of the transmitter.

• An external power supply is required to operate the transmitter.

• The power required across the transmitter power terminals is 12 to

42.4 V dc (the power terminals are rated to 42.4 V dc). To prevent

damaging the transmitter, do not allow terminal voltage to drop

below 12.0 V dc when changing the configuration parameters.

Power the Transmitter

1. Connect the positive power lead to the “+” terminal. Connect

the negative power lead to the “–” terminal.

2. Tighten the terminal screws.

3. Apply power (12 – 42 V dc).

00825-0100-4825.fm Page 9 Wednesday, February 8, 2006 1:53 PM

Quick Installation Guide

00825-0100-4825, Rev CA

February 2006

Rosemount 248

TEP

CONTINUED

...

Figure 2. Power, Communication, and Sensor Terminals

Ground the Transmitter

Ungrounded Thermocouple, mV, and RTD/Ohm Inputs

Each process installation has different requirements for grounding.

Use the grounding options recommended by the facility for the specific

sensor type, or begin with grounding Option 1 (the most common).

Option 1 (for grounded housing):

1. Connect sensor wiring shield to the transmitter housing.

2. Ensure the sensor shield is electrically isolated from surrounding

fixtures that may be grounded.

3. Ground signal wiring shield at the power supply end.

Sensor Terminals

Power/Communication

Terminals

4–20 mA loop

Sensor Wires

Shield ground point

Transmitter

00825-0100-4825.fm Page 10 Wednesday, February 8, 2006 1:53 PM

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