User's Manual

Reference Manual
00809-0100-4708, Rev AA
June 2010
5-1
Rosemount 708
Section 5 Operation and Maintenance
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 5-1
Power Module Replacement . . . . . . . . . . . . . . . . . . . . . . . page 5-1
SAFETY MESSAGES Instructions and procedures in this section may require special precautions to
ensure the safety of the personnel performing the operations. Information that
potentially raises safety issues is indicated by a warning symbol ( ). Please
refer to the following safety messages before performing an operation
preceded by this symbol.
Warnings
POWER MODULE
REPLACEMENT
Expected power module life is eight years at reference conditions.
(1)
When the power module needs to be replaced, remove the power module
cover and the power module (Part Number 00753-9220-0001) then replace
the cover. Tighten to specification and verify operation.
Handling Considerations
The power module with the wireless unit contains one “D” size primary
lithium/thionyl chloride battery. Each battery contains approximately 2.5
grams of lithium. Under normal conditions, the battery materials are
self-contained and are not reactive as long as the batteries and the battery
pack integrity 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.
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 that the operating atmosphere of the transmitter is consistent with the
appropriate hazardous locations certifications.
Electrical shock could cause death or serious injury.
• Use extreme caution when making contact with the leads and terminals.
(1) Reference conditions are 70° F (21° C), transmit rate of once per minute, and routing data
for three additional network devices.