User's Manual

22
Reference Manual
00809-0300-4248, Rev AA
Section 3: Installation
July 2014
Installation
3.2 Wireless consideration
3.2.1 Power up sequence
The Rosemount 248 Wireless and all other devices should be installed only after the Smart
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 that new devices join the network faster. For more information see the
Emerson Smart Wireless Gateway Manual (Doc. No. 00809-0200-4420).
3.2.2 Internal 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
antenna should be approximately 3 ft (1 m) from any large structure or building to allow clear
communication to other devices.
3.3 Field Communicator connections
In order for the Field Communicator to interface with the Rosemount 248 Wireless Transmitter,
the Power Module must be connected. Refer to Figure 3-1 for a diagram on how to connect the
Field Communicator.
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 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.