Emerson Rosemount 3100 Series, Reference Manual, Page: 77 / 144

Reference Manual
00809-0100-4840, Rev. BA
July 2008
A-3
Rosemount 3100 Series
TEMPERATURE AND
PRESSURE RATINGS
The process temperature/pressure rating depends on the design of the
transmitter in combination with the flange materials.
LOAD LIMITATIONS
A HART
®
Communicator requires a minimum load resistance of 250 Ohm
within the loop in order to function properly. Communication with The
Rosemount 3490 Universal Controller does not require additional resistance.
The maximum load resistance can be determined from these diagrams:
NOTE
R = Maximum Load Resistance
U = External Power Supply Voltage
Pressure
psi (bar)
158
°
F
(70
°
C)
-4
°
F (-20
°
C) on The 3101
-22
°
F (-30
°
C) on The 3102/3105
-4 psi
(-0,25 bar)
44 psi
(3 bar)
OPERATING RANGE
The final rating may be limited by
flange selection
Temperature
°
F (
°
C)
Process temperature and pressure diagram for The Rosemount 3100 Series
U (V)
R (Ohms)
0
Non-Intrinsically Safe Installations Intrinsically Safe Installations
R (Ohms)
R (Ohms)
U (V) U (V)
12 12 30 40
30
1244
800
400
12 20
24
533
Rosemount 3101 Rosemount 3102 and 3105
0
1244
800
400
0
20 30 20
1244
800
400
0
Rosemount 3105
25
0
25
0
533 533
0