Emerson Rosemount 248 User manual

Quick Start Guide
00825-0200-4248, Rev EC
April 2019
Rosemount™248 Wireless Temperature
Transmitter
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Quick Start Guide
Rosemount 248 Wireless Temperature
Transmitter
Rosemount 248 Wireless Hardware Revision
HART®Device Revision
Device Install Kit/Device Driver (DD) Revision
Device Type
1
1
Device Revision 01, DD Revision 01 or greater
2676
NOTICE
This guide provides basic guidelines for the Rosemount 248 Wireless. It does not provide instructions for
detailed configuration, diagnostics, maintenance, service, troubleshooting, or installations. Refer to the
Rosemount 248 Wireless Reference Manual for more instruction. The manual and this guide are also
available electronically on Emerson.com/Rosemount.
Failure to follow these installation guidelines could result in death or serious injury.
Make sure only qualified personnel perform the installation.
Explosions could result in death or serious injury.
Before connecting a Field Communicator in an explosive atmosphere, make sure the instruments are
installed in accordance with intrinsically safe or non-incendive field wiring practices.
Verify the operating atmosphere of the transmitter is consistent with the appropriate hazardous
locations certifications.
Process leaks could result in death or serious injury.
Do not remove the thermowell while in operation.
Install and tighten thermowells and sensors before applying pressure.
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.
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
operations.
This device must be installed to ensure a minimum antenna separation distance of 20 cm from all
person.
The power module may be replaced in a hazardous area. The power module has surface resistivity
greater than one giga-ohm 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.
Contents
Wireless considerations. . . . . . . . . . . . . . . . . . . . 4
Physical installation . . . . . . . . . . . . . . . . . . . . . . . 5
Verify operation . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Reference Information. . . . . . . . . . . . . . . . . . . . 11
Power module replacement . . . . . . . . . . . . . . . 14
Product Certifications . . . . . . . . . . . . . . . . . . . . 16
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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 the unit.
Each green power module contains one “D” size primary lithium-thionyl chloride 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.
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 power module life, storage
temperature should not exceed 30 °C.
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1.0 Wireless considerations
1.1 Power up sequence
The power module should not be installed on any wireless device until the
Gateway is installed and 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 Gateway Reference Manual.
1.2 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.
1.3 Field Communicator connections
The power module must be installed in the device for the Field Communicator to
interface with the Rosemount 248 Wireless. 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 1 for instructions on connecting the Field Communicator to the
Rosemount 248 Wireless.
Figure 1. Field Communicator Connection
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2.0 Physical installation
The Rosemount 248 Wireless can be installed in one of two configurations: Direct
Mount, where the sensor is connected directly to the Rosemount 248 Wireless
conduit entry, or remote mount, where the sensor is mounted separately from
the 248 Wireless housing, then connected to the Rosemount 248 Wireless via
wiring or conduit. Select the installation sequence that corresponds to the
mounting configuration.
2.1 Direct mount
The direct mount installation should not be used when installing with a
Swagelok®fitting.
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 2. Exploded View of LCD Display and Power Module Assembly
4. Attach the sensor to the Rosemount 248 Wireless 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 7.
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.
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.
11. Reattach and tighten the power module cover.
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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. Direct Mount
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.
2.2 Remote mount
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 2.
4. Run wiring (and conduit, if necessary) from the sensor to the Rosemount 248
Wireless. Use an 1/2-in. NPT when mating conduit to the Rosemount 248
Wireless.
5. Pull the wiring through the threaded conduit entry of the Rosemount 248
Wireless.
6. Attach the sensor wiring to the terminals as indicated on Figure 7.
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.
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12. Reattach and tighten the power module cover.
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.
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.
Figure 4. Remote Mount
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.
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3.0 Verify operation
Operations can be verified in four locations: at the device via the local display,
using the Field Communicator, at the Gateway's integrated web interface, or
using AMS™Suite Wireless Configurator or AMS Device Manager.
3.1 Local display
During normal operation, the LCD display will display the PV value at the
configured update rate.
For Device Status screens, see LCD screen messages on Rosemount 248 Wireless
Reference Manual.
3.2 Field Communicator
For HART Wireless transmitter communication, a Rosemount 248 Wireless DD is
required. To obtain the latest DD, visit the Emerson™Easy Upgrade site at:
Emerson.com/Rosemount/Device-Install-Kits
The communication status may be verified in the wireless device using the
following Fast Key sequence.
3.3 Gateway
In the integrated web interface from the Gateway, navigate to the Explorer>Status
page. This page shows whether the device has joined the network and if it is
communicating properly.
Note
It may take several minutes for the device to join the network.
Note
If the device joins the network and immediately has an alarm present, it is likely due to
sensor configuration. Check the sensor wiring (see Figure 7 on page 11) and the sensor
configuration (see Table 3 on page 12).
Table 1. Fast Key Sequence
Function Fast Key sequence Menu items
Communications 3, 4 Comm Status, Join Mode, Available Neighbors,
Advertisement, Join Attempts
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Figure 5. Gateway Network Settings
3.4 AMS Wireless Configurator
When the device has joined the network, it will appear in the Wireless
Configurator window as illustrated in figure below. For HART Wireless transmitter
communication, a Rosemount 248 Wireless DD is required. To obtain the latest
DD, visit the Emerson Easy Upgrade site at:
Emerson.com/Rosemount/Device-Install-Kit
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Figure 6. Rosemount 248 Wireless shown on AMS Wireless Configurator
3.5 Troubleshooting
If the device is not joining to the network, check to make sure that you have a
power supply in your device. If the device is not joined to the network after power
up, verify the correct configuration of the Network ID and Join Key, and verify that
Active Advertising has been enabled on the Gateway. The Network ID and Join
Key in the device must match the Network ID and Join Key of the Gateway.
The Network ID and Join Key may be obtained from the Gateway on the
Setup>Network>Settings page on the web server (see Figure 5 on page 9). The
Network ID and Join Key may be changed in the wireless device by using the
following Fast Key sequence.
Table 2. Fast Key Sequence
Function Fast Key sequence
Join to Network 2, 1, 1
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