Emerson Rosemount 644 Quick Start Manual page 42

Quick Start Guide
Process temperatures may exceed the limits defined in
Temperature of the LCD cover is verified to not exceed the service
temperatures in
values specified in
Table 4-3: Process Temperature Limits (Table 3)
Transmitter with LCD
Cover
No Extension
3" Extension
6" Extension
9" Extension
Table 4-4: Process Temperature Limits (Table 4)
Transmitter with LCD
Cover
Table 4-5: Entity Parameters
U (V)
i
I (mA) 300
i
P (W)
i
C (nF) 2.1
i
42
Table 4-4and the process temperatures do not exceed the
Table 4-2.
Process Temperature [°C]
Gas
T6
55 °C
55 °C
60 °C
65 °C
Service Temperature [°C]
Gas
T6
65 °C
Fieldbus/PROFIBUS
[FISCO]
30
[17.5]
[380]
1.3 at T4 (-50 °C ≤ T
a
+60 °C)
[5.32 at T4(-50 °C ≤ T
+60 °C)]
T5 T4...T1
70 °C 95 °C
70 °C 100 °C
70 °C 100 °C
75 °C 110 °C
T5 T4...T1
75 °C 95 °C
HART
30
200
≤ .67 at T6(-60 °C ≤ T
+40 °C)
≤ .67 at T5(-60 °C ≤ T
a
+50 °C)
1.0 at T5(-60 °C ≤ T
+40 °C)
1.0 at T4(-60 °C ≤ T
+80 °C)
10
Table 4-3if the
HART (Enhanced)
30
150 for T ≤ 80 °C
a
170 for T ≤70 °C
a
190 for T ≤60 °C
a
≤ .67 at T6(-60 °C ≤ T
a
+40 °C)
≤ .67 at T5(-60 °C ≤ T
a
+50 °C)
≤ .80 at T5(-60 °C ≤ T
a
+40 °C)
≤ .80 at T4(-60 °C ≤ T
a
+80 °C)
3.3
Emerson.com/Rosemount
May 2019
Dust
T130°C
95 °C
100 °C
100 °C
110 °C
Dust
T130°C
95 °C
≤
a
≤
a
≤
a
≤
a