Emerson Rosemount 248 Manuel utilisateur

Quick Start Guide

00825-0100-4825, Rev HA

January 2017

Rosemount™248 Temperature

Transmitter

00825-0100-4825_12-27_RevHA.fm Page 1 Tuesday, January 17, 2017 10:56 PM

January 2017

Quick Start Guide

NOTICE

This 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 for more instruction. The manual and this guide are 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 Hazardous Locations Certifications for

any restrictions associated with a safe installation.

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.

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 have the

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

closing entries.

When installing in a Hazardous Location, use only appropriately listed or Ex certified plugs, adapters or

glands in cable/conduit entries.

Contents

Configure (bench calibration) . . . . . . . . . . . . . . 3

Mount the transmitter . . . . . . . . . . . . . . . . . . . . 5

Connect the wiring . . . . . . . . . . . . . . . . . . . . . . . 9

Perform a loop test . . . . . . . . . . . . . . . . . . . . . . 12

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

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Quick Start Guide

January 2017

1.0 Configure (bench calibration)

The Rosemount 248 can be configured 3 ways: a Field Communicator, the

Rosemount 248 PC Programming Kit, or custom configured at the factory using

the C1 option code.

Refer to the Rosemount 248 Reference Manual and the Field Communicator

Reference Manual for more information.

1.1 Connecting a Field Communicator

The Field Communicator Field Device Revision Dev v1, DD v1or later is required

for complete functionality.

Figure 1. Connecting a Field Communicator to a Bench Loop

Note

Do not operate when power is below 12 Vdc at the transmitter terminal.

1.2 Verify transmitter configuration

To verify operation using a Field Communicator, refer to the Fast Keys below.

Refer to the Rosemount 248 Reference Manual for more detailed description.

A. Rosemount 248 Transmitter

B. 250 Ω≤ RL ≤1100 Ω

C. Field Communicator

D. Power supply

Function Fast Keys Function Fast Keys

Active Calibrator 1, 2, 2, 1, 3 Poll Address 1, 3, 3, 3, 1

Alarm/Saturation 1, 3, 3, 2 Process Temperature 1, 1

AO Alarm Type 1, 3, 3, 2, 1 Process Variables 1, 1

Burst Mode 1, 3, 3, 3, 3 PV Damping 1, 3, 3, 1, 3

Burst Option 1, 3, 3, 3, 4 PV Unit 1, 3, 3, 1, 4

Calibration 1, 2, 2 Range Values 1, 3, 3, 1

Configuration 1, 3 Review 1, 4

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January 2017

Quick Start Guide

For devices following the new device dashboard, refer to the Fast Keys below:

D/A Trim 1, 2, 2, 2 Scaled D/A Trim 1, 2, 2, 3

Damping Values 1, 1, 10 Sensor Connection 1, 3, 2, 1, 1

Date 1, 3, 4, 2 Sensor 1 Setup 1, 3, 2, 1, 2

Descriptor 1, 3, 4, 3 Sensor Serial Number 1, 3, 2, 1, 3

Device Output Configuration 1, 3, 3 Sensor 1 Trim-Factory 1, 2, 2, 1, 2

Diagnostics and Service 1, 2 Sensor Type 1, 3, 2, 1, 1

Filter 50/60 Hz 1, 3, 5, 1 Software Revision 1, 4, 1

Hardware Rev 1, 4, 1 Status 1, 2, 1, 4

Intermittent Detect 1, 3, 5, 4 Terminal Temperature 1, 3, 2, 2,

Loop Test 1, 2, 1, 1 Test Device 1, 2, 1

LRV (Lower Range Value) 1, 1, 6 URV (Upper Range Value) 1, 1, 7

LSL (Lower Sensor Limit) 1, 1, 8 USL (Upper Sensor Limit) 1, 1, 9

Measurement Filtering 1, 3, 5 Variable Mapping 1, 3, 1

Message 1, 3, 4, 4 Variable Re-Map 1, 3, 1, 3

Num Req Preams 1, 3, 3, 3, 2 Write Protect 1, 2, 3

Open Sensor Holdoff 1, 3, 5, 3 2-Wire Offset 1, 3, 2, 1, 2, 1

Percent Range 1, 1, 5

Function Fast Keys Function Fast Keys

Active Calibrator 3, 4, 1, 3 Poll Address 2, 2, 4, 1

Alarm Saturation 2, 2, 2, 5 Process Temperature 1, 3

AO Alarm Type 2, 2, 2, 5 Process Variables 3, 2, 1

Burst Mode 2, 2, 4, 2 PV Damping 2, 2, 1, 6

Calibration 3, 4, 1, 1 PV Unit 2, 2, 1, 4

Configuration 2, 2, 2, 4 Range Values 2, 2, 2, 4

D/A Trim 3, 4 Scaled D/A Trim 3, 4, 3

Damping Values 2, 2, 1, 6 Sensor Connection 2, 2, 1, 3

Date 2, 2, 3, 1, 2 Sensor 1 Set Up 2, 1, 1

Descriptor 2, 2, 3, 1, 4 Sensor Serial Number 1, 7, 1, 4

Device Info 1, 7 Sensor 1 Trim 3, 4, 1, 1

Device Output Configuration 2, 2, 2, 4 Sensor 1 Trim- Factory 3, 4, 1, 2

Filter 50/60 Hz 2, 2, 3, 7, 1 Sensor Type 2, 2, 1, 2

Hardware Rev 1, 7, 2, 3 Software Revision 1, 7, 2, 4

HART (R) Output 1, 7, 2, 1 Status 1, 1

Loop Test 3, 5, 1 Tag 2, 2, 3, 1,1

LVR (Lower Range Value) 2, 2, 2, 4, 3 Terminal Temperature 3, 3, 2

Function Fast Keys Function Fast Keys

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Quick Start Guide

January 2017

1.3 Rosemount 248 PC Programmer Kit installation

1. Install all necessary software for Rosemount 248 PC configuration:

a. Install the Rosemount 248C software.

Place the Rosemount 248C CD-ROM in the drive.

Run setup.exe from Windows™NT, 2000, or XP.

b. Install the MACTek®HART Modem drivers completely before beginning

bench configuration with the Rosemount 248 PC Programming system.

Note

For USB modem: Upon first use, configure appropriate COM ports within the Rosemount

248PC 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.

2. Set up configuration system hardware:

a. Hook up the transmitter and load resistor (250-1100 ohms) wired in

series with the power supply (the Rosemount 248 device will need an

external power supply of 12-42.4 Vdc for configuration).

b. Attach the HART modem in parallel with the load resistor and connect it

to the PC.

See Table 1 for spares kit and re-order numbers. For more information, refer to

the Rosemount 248 Reference Manual.

2.0 Mount the transmitter

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

from draining into the transmitter housing.

2.1 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.

LSL (Lower Sensor Limit) 2, 2, 1, 9 URV (Upper Range Value) 2, 2, 2, 4, 2

Message 2, 2, 3,1,3 USL (Upper Sensor Limit) 2, 2, 1, 8

Open Sensor Holdoff 2, 2, 3, 4 Write Protect 2, 2, 3, 6

Percent Range 2, 2, 2, 3 2-Wire Offset 2, 2, 1, 5

Table 1. Programming Kit Spare Part Numbers

Product description Part number

Programming Software (CD) 00248-1603-0002

Rosemount 248 Programmer Kit - USB 00248-1603-0003

Rosemount 248 Programmer Kit - Serial 00248-1603-0004

Function Fast Keys Function Fast Keys

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January 2017

Quick Start Guide

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.

Note

Enclosure covers must be fully engaged to meet explosion-proof requirements.

2.2 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 thermowell 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.

A. Rosemount 248 Transmitter

B. Connection head

C. Thermowell

D. Transmitter mounting screws

E. Integral mount sensor with flying leads

F. Extension

AB C

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Quick Start Guide

January 2017

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.

Note

Enclosure covers must be fully engaged to meet explosion-proof requirements.

2.3 Mounting to a DIN rail

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.

A. Mounting hardware

B. Transmitter

C. Rail clip

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

A. Threaded thermowell

B. Threaded style sensor

C. Standard extension

D. Universal head

E. Conduit entry

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January 2017

Quick Start Guide

Refer to the Metric Sensor Product Data Sheet 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.

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 Rosemount Sensor Product Data Sheet 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.

A. Rail mount transmitter

B. Sensor leads with cable gland

C. Integral mount sensor with terminal block

D. Connection head

E. Standard extension

F. Threaded thermowell

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Quick Start Guide

January 2017

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.

3.0 Connect the wiring

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).

Note

To prevent damaging the transmitter, do not allow terminal voltage to drop below 12.0 V

dc when changing the configuration parameters.

3.1 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).

A. Rail mount transmitter

B. Threaded sensor connection head

C. Threaded style sensor

D. Standard extension

E. Threaded thermowell

A B C D E

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January 2017

Quick Start Guide

Figure 2. Power, Communication, and Sensor Terminals

A. Sensor terminals

B. Power/communication terminals

3.2 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.

Option 2 (for ungrounded housing)

1. Connect signal wiring shield to the sensor wiring shield.

2. Ensure the two shields are tied together and electrically isolated from the

transmitter housing.

3. Ground shield at the power supply end only.

4. Ensure the sensor shield is electrically isolated from the surrounding

grounded fixtures.

5. Connect shields together, electrically isolated from the transmitter

A. Sensor wires

B. Transmitter

C. 4-20 mA loop

D. Shield ground point

–

00825-0100-4825_12-27_RevHA.fm Page 10 Tuesday, January 17, 2017 10:56 PM

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