Emerson Rosemount 3051N, Reference Manual, Page: 52 / 84

Specifications and Reference Data
October 2016
Reference Manual
00809-0100-4808, Rev DA
44
Specifications and Reference Data
A.3.5 Span and zero, zero elevation, and suppression
Zero and span values can be set anywhere within the range limits stated in Table A-2 and Table A-3 , providing sensor limits are not
exceeded.
Span must be greater than or equal to the minimum span stated in Table A-2 and Table A-3 .
A.3.6 Humidity limits
0-100% relative humidity
A.3.7 Volumetric displacement
Less than 0.005 in
3
(0,08 cm
3
)
A.3.8 Turn-on time
Two seconds maximum
A.3.9 Response time
Dead time (T
d
)
Maximum dead time before analog output reacts to step change in
input = 0.1 seconds
Update rate
20 times per second minimum
Minimum time constant (T
c
)
Adjustable damping
Time constant on analog output is incrementally adjustable from
the minimum values stated above to 25.6 seconds nominal.
Figure A-1. Typical Smart Transmitter Response Time
Table A-2. Rosemount 3051ND and 3051NG Range and Sensor Limits
Range
Minimum span Range and sensor limits
Rosemount 3051ND/NG Upper (URL)
Lower (LRL)
Rosemount 3051ND Rosemount 3051NG
0 0.1 inH
2
0 (25 Pa) 3.0 inH
2
0 (750 Pa) -3.0 inH
2
0 (-750 Pa) N/A
1 0.5 inH
2
0 (0,12 kPa) 25 inH
2
0 (6,22 kPa) -25 inH
2
0 (-6,22 kPa) N/A
2 2.5 inH
2
0 (0,62 kPa) 250 inH
2
0 (62,2 kPa) -250 inH
2
0 (-62,2 kPa) -250 inH
2
0 (-62,2 kPa)
3 10 inH
2
0 (2,48 kPa) 1000 inH
2
0 (248 kPa) -1000 inH
2
0 (-248 kPa) 0.5 psia (3,5 kPa abs)
4 3 psi (20,7 kPa) 300 psi (2 070 kPa) -300 psi (-2 070 kPa) 0.5 psia (3,5 kPa abs)
5 20 psi (138 kPa) 2000 psi (13 800 kPa) -2000 psi (-13 800 kPa) 0.5 psia (3,5 kPa abs)
Table A-3. Rosemount 3051NA Range and Sensor Limits
Range Minimum span
Range and sensor limits
Upper (URL) Lower (LRL)
1 0.3 psia (2,07 kPa abs) 30 psia (206,8 kPa abs) 0 psia (0 kPa abs)
2 1.5 psia (10,34 kPa abs) 150 psia (1 034,2 kPa abs) 0 psia (0 kPa abs)
3 8 psia (55,16 kPa abs) 800 psia (5 515,8 kPa abs) 0 psia (0 kPa abs)
4 40 psia (275,8 kPa abs) 4000 psia (27 580 kPa abs) 0 psia (0 kPa abs)
At 70 °F, with minimum damping setting
Range code
Minimum time constant (Tc) including dead
time (Td)
0

1.0 seconds
1

0.5 seconds
2 - 5

0.2 seconds
At 70 °F, with minimum damping setting
Range code
Minimum time constant (Tc) including dead
time (Td)
20mA
9.89mA
4mA
Time
Transmitter 4–20 mA Output vs. Time
63.2% of Total
Step Change
T
d
= Dead Time
T
c
= Time Constant
Response Time =
T
d
+T
c
Pressure Released
T
c
T
d