A.2.4
Temperature limits
Verify that the operating atmosphere of the transmitter is consistent with the appropriate
hazardous locations certifications, see
.
Table A-4: Ambient Temperature Limits
Description
Operating limit
Storage limit
With LCD Display
-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)
(1)
LCD display may not be readable and device display updates will be slower at temperatures
below -4 °F (-20 °C).
A.2.5
Process temperature and pressure rating
gives the maximum process temperature (measured at the lower part of the
flange or threaded connection) and pressure rating.
Final rating depends on flange, material of construction, and O-ring selection.
Figure A-8: Maximum Rating, Standard Tank Connections
580 (40)
232 (16)
-15 (-1)
-40
(-40)
302
(150)
A
C
B
A. Pressure psig (bar)
B. Temperature °F (°C)
C. PTFE covered probe and flange (model code 7)
Table A-5: Temperature Ranges for Standard Tank Seals with Different O-ring
Material
O-ring material
Temperature °F (°C) in air
Minimum
Maximum
Viton
®
Fluoroelastomer
5 (-15)
302 (150)
Ethylene Propylene (EPDM)
-40 (-40)
266 (130)
Kalrez
®
6375
Perfluoroelastomer
14 (-10)
302 (150)
Nitrile Butadiene (NBR)
-31 (-35)
230 (110)
Reference Manual
Specifications and reference data
00809-0100-4308
February 2020
Reference Manual
153
Содержание Rosemount 3308A
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