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Reference Manual
00809-0200-4705, Rev AA
Section 1: Introduction
May 2015
Introduction
1.2.4 Electrical
Caring for the power module
The Rosemount 705 Wireless Totalizing Transmitter is self-powered. The included Black Power
Module contains two “C” size primary lithium/thionyl chloride batteries. Each battery contains
approximately 2.5 grams of lithium, for a total of 5 grams in each pack. Under normal
conditions, the battery materials are self-contained and are not reactive as long as the batteries
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.
Making turbine meter connections
Make turbine meter connections through the cable entry in the side of the connection head. Be
sure to provide adequate clearance for cover removal and lead attachments (remote option).
1.2.5 Verifying operating atmosphere
Verify the operating atmosphere of the transmitter is consistent with the appropriate hazardous
locations certifications.
Isolating the transmitter from sources of heat
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 switch to the transmitter
housing. If the expected process temperature is near or beyond specification limits, consider
using an extension, or remote mount the transmitter to thermally isolate it from the process.
Temperature limits
Operating limit Storage limit
With LCD Display
-4 to 175 °F
-20 to 80 °C
-40 to 185 °F
-40 to 85 °C
Without LCD Display
-40 to 185 °F
-40 to 85 °C
-40 to 185 °F
-40 to 85 °C