Emerson Rosemount 5408, Справочное руководство

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Table A-6: Ambient Temperature Limits
Description Operating limit Storage limit
(1)
Without LCD
display
-40 °F to 176 °F (-40 °C to 80 °C)
-58 °F to 176 °F (-50 °C to 80 °C)
With LCD display
(2)
-40 °F to 176 °F (-40 °C to 80 °C)
(1) The minimum storage temperature is -22 °F (-30 °C) for the cone antenna with Kalrez
®
6375 O-
ring (antenna type code CBK).
(2) LCD display may not be readable and LCD display updates will be slower at temperatures below
-4 °F (-20 °C).
The ambient temperature limits may be further restricted by the process temperature as
described by
Figure A-8 .
Figure A-8: Ambient Temperature vs. Process Temperature
104 (40)
176 (80)
482
(250)
-76
(-60)
248
(120)
-40 (-40)
A
B
A. Ambient temperature °F (°C)
B. Process temperature °F (°C)
Aside from ambient temperature variations, heat from the process may be transferred to
the transmitter housing. Being exposed to a high process temperature without extra
cooling for an extended period of time may cause the electronics temperature to exceed
the allowed limit and thereby affect the transmitter's performance and reliability. The
latter are potential risks whenever a transmitter has shut down due to high electronics
temperature. The transmitter will warn about the electronics temperature being out of
limits. See
Table 7-4 .
A.2.7 Flange rating
ASME
• 316 SST according to ASME B16.5 Table 2-2.2
• 316L SST according to ASME B16.5 Table 2-2.3 (for protective plate design)
(16)
• Alloy C-276 (UNS N10276) according to ASME B16.5 Table 2-3.8
• Alloy 400 (UNS N04400) according to ASME B16.5 Table 2-3.4
(16) Flange rating according to backing flange.
Reference Manual Specifications and reference data
00809-0100-4408 February 2020
Rosemount 5408 and 5408:SIS Level Transmitters 173