Rosemount 8712, Reference Manual

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Reference Manual
00809-0100-4664, Rev BA
January 2010
Rosemount 8712
A-6
PERFORMANCE
SPECIFICATIONS
(System specifications are given using the frequency output and with the unit
at referenced conditions.)
Accuracy
Includes the combined effects of linearity, hysteresis, repeatability, and
calibration uncertainty.
Rosemount 8712E with 8705/8707 Sensor:
Standard system accuracy is ±0.25% of rate ±1.0 mm/sec from 0.04 to 6
ft/s (0.01 to 2 m/s); above 6 ft/s (2 m/s), the system has an accuracy of
±0.25% of rate ±1.5 mm/sec.
Optional high accuracy is ±0.15% of rate ±1.0 mm/sec from 0.04 to 13 ft/s
(0.01 to 4 m/s); above 13 ft/s (4 m/s), the system has an accuracy of
±0.18% of rate.
(1)
Rosemount 8712E with 8711 Sensor:
Standard system accuracy is ±0.25% of rate ±2.0 mm/sec from 0.04 to 39
ft/s (0.01 to 12 m/s).
Optional high accuracy is ±0.15% of rate ±1.0 mm/sec from 0.04 to 13 ft/s
(0.01 to 4 m/s); above 13 ft/s (4 m/s), the system has an accuracy of
±0.18% of rate.
Rosemount 8712E with 8721 Sensor:
Standard system accuracy is ±0.5% of rate from 1 to 39 ft/s (0.3 to 12 m/s);
between 0.04 and 1.0 ft/s (0.01 and 0.3 m/s), the system has an accuracy
of ±0.005 ft/s (0.0015 m/s).
(1) For sensor sizes greater than 12 in. (300 mm) the high accuracy is ±0.25% of rate from 3 to
40 ft/sec (1 to 12 m/sec).
0
0.5 0.5
1.0 1.0
1.5 1.5
2.0 2.0
2.5 2.5
0 3 3
(1) (1)
6 6
(2) (2)
13 13
(4) (4)
20 20
(6) (6)
27 27
(8) (8)
33 33
(10) (10)
40 40
(12) (12)
Velocity in ft/s (m/s) Velocity in ft/s (m/s)
%
o
f R
at
e
0.25% 0.25% 0.15% 0.15%
0
0.5 0.5
1.0 1.0
1.5 1.5
2.0 2.0
2.5 2.5
0 3 3
(1) (1)
6 6
(2) (2)
13 13
(4) (4)
20 20
(6) (6)
27 27
(8) (8)
33 33
(10) (10)
40 40
(12) (12)
Velocity in ft/s (m/s) Velocity in ft/s (m/s)
% of Rate%
o
f R
at
e
0.25% 0.25% 0.15% 0.15%