Rosemount 248H Quick Start Guide

Rosemount™ 248 Temperature

Transmitter

Quick Start Guide

00825-0100-4825, Rev HA

January 2017

Quick Start Guide

January 2017

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

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

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.

for more instruction. The manual and this guide are also available electronically on

/2–14 NPT thread form. Entries

Contents

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

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

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

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

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

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

Reference Manual

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

for more information.

Quick Start Guide

and the Field Communicator

A. Rosemount 248 Transmitter B. 250 Ω ≤ R

≤ 1100 Ω

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.

Function Fast Keys Fun ction 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 Alar m Typ e 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

C. Field Communicator D. Power supply

Quick Start Guide

Function Fast Keys Function Fas t Keys

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 Ter min al Te mper atu re 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

Measurem ent Filtering 1, 3, 5 Variable M apping 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

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

January 2017

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 Sof tware 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 Te rmi nal Tempe rat ure 3, 3, 2

January 2017

Function Fast Keys Function Fas t Keys

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

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

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 Commu nicate 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 correc t.

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

Table 1. Programming Kit Spare Part Numbers

™

NT, 2000, or XP.

Quick Start Guide

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

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.

Quick Start Guide

AB C

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.

January 2017

A. Rosemount 248 Transmitter B. Connection head C. Thermowell

D. Transmitter mounting screws E. Integral mount sensor with flying leads F. E xt ension

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.

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

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

8. Install and tighten the universal head cover.

Note

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

Quick Start Guide

conduit threads with silicone tape.

the sensor and power leads to the transmitter. Avoid contact with other terminals.

A. Threaded thermowell B. Threaded style sensor C. Standard extension

D. Universal head E. Conduit entry

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

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.

January 2017

A. Rail mount transmitter B. Sensor leads with cable gland C. Integral mount sensor with terminal block

D. Connection head E. Standard extension F. T hr eade d t herm ow ell

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 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.

for complete sensor and

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