Emerson Rosemount 708 Quick Start Manual page 12

Quick Start Guide
CAUTION
Use caution when handling the power module, it may be damaged if
dropped from heights exceeding 6.10 m (20 ft).
4.1.5 Environmental
Verify the operating atmosphere of the transmitter is consistent with the
appropriate hazardous locations certification.
Temperature effects
The transmitter will operate within specifications for ambient temperatures
between –40 and 85 °C (–40 and 185 °F).
Heat from the process is transferred to the transmitter housing. If the
process temperature is high, the ambient temperature will need to be lower
to account for heat transferred to the transmitter housing. See
ambient temperature derating. Refer to
option (HT01) for ambient temperature derating.
Table 4-1: Ambient Temperature Derating
Process temperature
°C
260
240
220
200
180
160
140
120
100
85
Table 4-2: Ambient Temperature Derating - HT01
Process temperature
°C
550
520
12
°F
500
464
428
392
356
320
284
248
212
185
°F
1022
968
Table 4-2 for High Temperature
Max ambient
°C
41
45
49
53
57
61
64
58
72
75
Max ambient
°C
41
45
Emerson.com/Rosemount
June 2022
Table 4-1 for
°F
106
113
120
127
135
142
147
136
162
167
°F
106
113