How it Works
Rosemount
Loading...
Q
Loading...
Loading...
Quick Start Guide: Rosemount 248 Wireless Temperature Transmitter
Manuals & Guides
28 pgs2.15 Mb0
Manuals & Guides
28 pgs1.44 Mb0
Table of contents
Loading...

Rosemount Quick Start Guide: Rosemount 248 Wireless Temperature Transmitter Manuals & Guides

Download
Quick Start Guide
00825-0200-4248, Rev GA
February 2021
Rosemount™ 248 Wireless Temperature Transmitter
Contents

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 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.
Quick Start Guide 3
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).
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.
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

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 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.
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.
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 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.
Quick Start Guide 9
Loading...
+ 19 hidden pages
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use