17
Reference Manual
00809-0200-4705, Rev AB
May 2017
3.3.2
Electrical
Caring for the power module
The Rosemount 705 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).
3.3.3
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
Options
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
Summary of Contents for Rosemount 705
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Page 10: ...2 Reference Manual 00809 0200 4705 Rev AB Introduction May 2017 Introduction ...
Page 32: ...28 Reference Manual 00809 0200 4705 Rev AB Commissioning May 2017 Commissioning ...
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