User's Manual

4
Reference Manual
00809-0300-4248, Rev AA
Section 1: Introduction
July 2014
Introduction
1.3.3 Mechanical
Location
When choosing an installation location and position, take into account the need for access to
the mesh network, access to the transmitter and to the power module compartment for ease
power module replacement.
Electronics cover
The electronics cover is tightened so that polymer contacts polymer. When removing the
electronics cover, ensure that there is no damage done to the o-ring. If damaged replace before
reattaching cover, ensuring polymer contacts polymer (i.e. no o-ring visible).
1.3.4 Electrical
Power Module
The Rosemount 248 Wireless Temperature transmitter is self-powered. The Power Module
contains a primary lithium-thionyl chloride battery (Green Power Module, model number
701PGNKF). Each battery contains approximately 5 grams of lithium. Under normal conditions,
the battery materials are self-contained and are not reactive as long as the battery and the
Power Module are maintained. Care should be taken to prevent thermal, electrical, or
mechanical damage. Contacts should be protected to prevent premature discharge.
Use caution when handling the power module, it may be damaged if dropped from heights in
excess of 20 feet.
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.
Sensor
Make sensor connections with the threaded
1
/2-inch. NPT connection sensor adapter.
1.3.5 Environmental
Verify that the operating atmosphere of the transmitter is consistent with the appropriate
hazardous locations certifications.
Temperature effects
The transmitter will operate within specifications for ambient temperatures between –40 and
185 °F (–40 and 85 °C). Heat from the process is transferred from the thermowell to the
transmitter housing. If the expected process temperature is near or beyond specification limits,
consider the use of additional thermowell and extension, or remote mounting the transmitter
to thermally isolate it from the process.