Emerson Rosemount 248 Manual de usuario

Quick Start Guide

00825-0300-4248, Rev AA

July 2020

Rosemount™ 248 Wireless Temperature

Transmitter

Contents

About this guide...........................................................................................................................3

Wireless considerations................................................................................................................6

Physical installation...................................................................................................................... 7

Verify operations........................................................................................................................11

Reference information............................................................................................................... 14

Power module replacement....................................................................................................... 17

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

Declaration of conformity.......................................................................................................... 23

China RoHS................................................................................................................................ 25

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2 Emerson.com/Rosemount

1 About this guide

This guide provides basic guidelines to install the Rosemount 248 Wireless

Temperature Transmmitter. It does not provide instructions for detailed

configuration, diagnostics, maintenance, service, troubleshooting, or

installations. Refer to the Rosemount 248 Temperature Transmitter

Reference Manual for more instruction. The manual and this guide are also

available electronically at Emerson.com/Rosemount.

1.1 Safety messages

WARNING

Failure to follow these installation guidelines could result in death or

serious injury.

Ensure only qualified personnel perform the installation.

Explosions

Explosions could result in death or serious injury.

Installation of device in an explosive environment must be in accordance

with appropriate local, national, and international standards, codes, and

practices.

Review the Hazardous Locations Certifications for any restrictions

associated with a safe installation.

Process leaks

Process leaks could result in death or serious injury.

Install and tighten thermowells and sensors before applying pressure.

Do not remove the thermowell while in operation.

Electrical shock

Electrical shock could cause 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 ½–14 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, glands, or adapters in cable/conduit entries.

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WARNING

This device complies with Part 15 of the FCC Rules. Operation is subject

to the following conditions:

This device may not cause harmful interference.

This device must accept any interference received, including

interference that may cause undesired operation.

This device must be installed to ensure a minimum antenna separation

distance of 8-in. (20 cm) from all persons.

The power module may be replaced in a hazardous area. The power

module has surface resistivity greater than one gigaohm and must be

properly installed in the wireless device enclosure. Care must be taken

during transportation to and from the point of installation to prevent

electrostatic charge build-up.

Physical access

Unauthorized personnel may potentially cause significant damage to and/or

misconfiguration of end users’ equipment. This could be intentional or

unintentional and needs to be protected against.

Physical security is an important part of any security program and

fundamental to protecting your system. Restrict physical access by

unauthorized personnel to protect end users’ assets. This is true for all

systems used within the facility.

NOTICE

Power module considerations (Green Power Module, model number

701PGNKF)

The green power module with the wireless unit contains one “D” size

primary lithium-thionyl chloride battery (model number 701PGNKF).

Each battery contains approximately 5.0 grams of lithium. Under normal

conditions, the battery materials are self-contained and are not reactive

as long as the batteries and the pack integrity are maintained. Care

should be taken to prevent thermal, electrical or mechanical damage.

Contacts should be protected to prevent premature discharge.

Battery hazards remain when cells are discharged.

Power modules should be stored in a clean and dry area. For maximum

battery life, storage temperature should not exceed 86 °F (30 °C).

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4 Emerson.com/Rosemount

NOTICE

Shipping considerations for wireless products (lithium batteries: Green

Power Module, model number 701PGNKF)

The unit was shipped to you without the power module installed.

Remove the power module prior to shipping.

Each power module contains one “D” size primary lithium battery.

Primary lithium batteries are regulated in transportation by the U.S.

Department of Transportation, and are also covered by IATA

(International Air Transport Association), ICAO (International Civil

Aviation Organization), and ARD (European Ground Transportation of

Dangerous Goods). It is the responsibility of the shipper to ensure

compliance with these or any other local requirements. Consult current

regulations and requirements before shipping.

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Quick Start Guide 5

2 Wireless considerations

2.1 Power up sequence

The Rosemount 248 Wireless Transmitter and all other devices should be

installed only after the Wireless Gateway (“Gateway”) has been installed and

is functioning properly. Wireless devices should also be powered up in order

of proximity from the Gateway, beginning with the closest. This will result in

a simpler and faster network installation. Enable Active Advertising on the

Gateway to ensure new devices join the network faster. For more

information see the Emerson Wireless Gateway Reference Manual.

2.2 Antenna position

The internal antenna is designed for multiple mounting orientations. The

transmitter should be mounted according to best practices for your

temperature measurement application. The transmitter should be

approximately 3 ft. (1 m) from any large structure or building to allow clear

communication to other devices.

2.3 Field Communicator connections

The power module must be installed in the device for the Field

Communicator to interface with the transmitter. The Field Communicator

connections are located on the Green Power Module. To communicate to

the transmitter, begin by removing the power module cover. This will

expose the HART® communication terminals located on the Green Power

Module. Next, connect the Field Communicator leads to the COMM port

connections on the Green Power Module.

This transmitter uses the Green Power Module; order model number

701PGNKF. The power module is keyed and can only be inserted in one

orientation. Field communication with this device requires a HART-based

Field Communicator. Refer to Figure 2-1 for instructions on connecting the

Field Communicator to the transmitter.

Figure 2-1: Field Communicator Connection

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6 Emerson.com/Rosemount

3 Physical installation

The transmitter can be installed in one of two configurations: Direct Mount,

where the sensor is connected directly to the transmitter conduit entry, or

Remote Mount, where the sensor is mounted separately from the

transmitter housing, then connected to the transmitter via conduit. Choose

the installation sequence that corresponds to the mounting configuration.

Upon installation of the transmitter, ensure that the conduit entry has an

installed conduit fitting or cable gland with approved thread sealant.

3.1 Direct mount

The direct mount installation should not be used when installing with a

Swagelok® fitting.

Procedure

1. Remove the transmitter enclosure cover.

2. Remove the LCD display (if applicable).

3. Loosen the captive screws and remove LCD display adapter plate (if

applicable).

Figure 3-1: Exploded View of LCD Display Assembly

4. Attach the sensor to the transmitter housing using the threaded

conduit entry. Be sure to use an approved thread sealant on all

connections.

5. Attach the sensor wiring to the terminals as indicated on Figure

1Figure 5-1.

6. Reattach and secure LCD display adapter plate to 5 in-lb of torque (if

applicable).

7. Reattach the LCD display (if applicable).

8. Reattach and tighten the transmitter enclosure cover.

9. Remove the power module cover.

10. Connect the Green Power Module.

11. Reattach and tighten the power module cover.

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Quick Start Guide 7

12. Always ensure a proper seal by installing the electronics housing

cover(s) so that polymer contacts polymer (i.e. no O-ring visible).

Use Rosemount O-rings.

13. Provide 1.75-in. (45 mm) of clearance for units without an LCD

display. Provide 3-in. (76 mm) of clearance for units with an LCD

display for cover removal.

Figure 3-2: Direct Mount

Dimensions are in inches (millimeters).

Note

Wireless devices should be powered up in order of proximity from

the Gateway, beginning with the closest device to the Gateway. This

will result in a simpler and faster network installation.

3.2 Remote mount

Procedure

1. Remove the transmitter enclosure cover.

2. Remove the LCD display (if applicable).

3. Loosen the captive screws and remove LCD display adapter plate (if

applicable). Refer to Figure 3-3.

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8 Emerson.com/Rosemount

Figure 3-3: Exploded View of LCD Display Assembly

4. Run wiring (and conduit, if necessary) from the sensor to the

transmitter.

Note

Use an ½-in. NPT when mating conduit to the transmitter.

5. Pull the wiring through the threaded conduit entry of the

transmitter.

6. Attach the sensor wiring to the terminals as indicated on Figure

1Figure 5-1.

7. Reattach and secure LCD display adapter plate to 5 in-lb of torque (if

applicable).

8. Reattach the LCD display (if applicable).

9. Reattach and tighten the transmitter enclosure cover.

10. Remove the power module cover.

11. Connect the Green Power Module.

12. Reattach and tighten the power module cover.

13. Always ensure a proper seal by installing the electronics housing

cover(s) so that polymer contacts polymer (i.e. no O-ring visible).

Use Rosemount O-rings.

14. Provide 1.75-in. (45 mm) of clearance for units without an LCD

display. Provide 3-in. (76 mm) of clearance for units with an LCD

display for cover removal.

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Quick Start Guide 9

Figure 3-4: Remote Mount

Dimensions are in inches (millimeters).

Note

Wireless devices should be powered up in order of proximity from

the Wireless Gateway, beginning with the closest device to the

Gateway. This will result in a simpler and faster network installation.

Quick Start Guide July 2020

10 Emerson.com/Rosemount

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