Rosemount 8712, Справочное руководство

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Reference Manual
00809-0100-4664, Rev BA
January 2010
A-7
Rosemount 8712
Optional high accuracy is ±0.25% of rate from 3 to 39 ft/s (1 to 12 m/s).
Rosemount 8712E with Legacy 8705 Sensors:
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).
Rosemount 8712E with Legacy 8711 Sensors:
Standard system accuracy is ±0.5% of rate from 3 to 39 ft/s (1 to 12 m/s);
between 0.04 and 3.0 ft/s (0.01 and 1 m/s), the system has an accuracy of
±0.015 ft/s (0.005 m/s).
Rosemount 8712E with Other Manufacturers’ Sensors:
When calibrated in the Rosemount Flow Facility, system accuracies as
good as 0.5% of rate can be attained.
There is no accuracy specification for other manufacturers’ sensors
calibrated in the process line.
Analog Output Effect
Analog output has the same accuracy as frequency output plus an additional
0.05% of span.
Vibration Effect
±0.1% of span per SAMA PMC 31.1, Level 2
Repeatability
±0.1% of reading
Response Time
0.2 seconds maximum response to step change in input
Stability
±0.1% of rate over six months
Ambient Temperature Effect
0.25% over operating temperature range
EMC Compliance
EN61326-1 : 2006 (Industrial) electromagnetic compatibility (EMC) for
process and laboratory apparatus.
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
0.5% 0.5%
0.25% 0.25%