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Rosemount Model 8800C Vortex Flowmeter with FOUNDATION
TM
Fieldbus
8-10
Vibration Effect An output with no process flow may be detected if sufficiently high
vibration is present.
The meter design will minimize this effect, and the factory settings for
signal processing are selected to eliminate these errors for most
applications.
If an output error at zero flow is still detected, it can be eliminated by
adjusting the low flow cutoff, trigger level, and/or low-pass filter.
As the process begins to flow through the meter, most vibration effects are
quickly overcome by the flow signal. At or near the minimum liquid flow
rates in a normal pipe mounted installation, the maximum vibration
should be 0.087 in. (2.21 mm) double amplitude displacement or 1 g
acceleration, whichever is smaller. At or near the minimum gas flow rates
in a normal pipe mounted installation, the maximum vibration should be
0.043 in. (1.09 mm) double amplitude displacement or
1
/2 g acceleration,
whichever is smaller.
Mounting Position Effect
The meter will meet accuracy specifications when mounted in horizontal,
vertical, or inclined pipelines.
EMI/RFI Effect
No effect on accuracy of digital output with twisted pair from 25 MHz to
1000 MHz for field strength of 10 V/m. Tested per EN 61326-1.
Magnetic-Field Interference
No effect on digital output accuracy at 30 A/m (rms). Tested per EN
61326-1.
Series Mode Noise Rejection
No effect on digital output accuracy at 1 V rms,
60 Hz. Meets IEC 770-1984, Section 6.2.4.2.
Common Mode Noise Rejection
No effect on digital output accuracy at 250 V rms,
60 Hz. According to FF-830-PS-2.0 test case 8.2.
Power Supply Effect
No effect on accuracy.
Physical Specifications
NACE Compliance Meets the requirements of the National Association of Corrosion Engineers
(NACE) Standard MR-01-75 (96).
Electrical Connections
1
/2–14 NPT, PG 13.5, or M20 ϫ 1.5 conduit threads. Communicator
connections permanently fixed to terminal block.
Nonwetted Materials Housing
Low-copper aluminum
(NEMA 4X, CSA Type 4X, IP66).
Paint
Polyurethane.
Cover O-rings
Buna-N.
Flanges
316/316L lap joint.