Model 8712C/U/H Magnetic Flowemter Transmitters
6-4
Model 8712H with Model 8707 Flowtube
System accuracy is ±0.5% of rate from 3 to 30 ft/s (1 to 10 m/s);
between 0.04 and 3.0 ft/s (0.01 and 0.3 m/s), the system has an
accuracy of ±0.005 ft/s; analog output has the same accuracy as
frequency output plus an additional 0.1% of span
Model 8712C/U with Model 8711 Flowtube
System accuracy is ±0.5% of rate from 3 to 30 ft/s (1 to 10 m/s);
below 3 ft/s (1 m/s), the system has an accuracy of ±0.015 ft/s (0.005
m/s); analog output has the same accuracy as frequency output plus
an additional 0.1% of span
Model 8712U with Other Manufacturers’ Flowtubes
When calibrated in the Rosemount Flow Facility, system accuracies
as good as 0.5% of rate can be attained. Analog output has the same
accuracy as frequency output, plus an additional 0.05% of span.
There is no accuracy specification for other manufacturers’
flowtubes calibrated in the process line.
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
±1% per 100 °F (37.8 °C)
RFI Effect
Class 1, A, B, C: ±0.5% of span at 3 V/m per SAMA PMC 33.1, wires
and conduit
Supply Voltage Effect
Transmitter meets supply voltage effect requirements of SAMA PMC
31.1, Section 5.10.1 through 5.10.5; transmitter withstands surges in
supply voltage as specified in IEEE 472, 1974
Physical Specifications Materials of Construction
Housing
Low-copper aluminum, NEMA 4X and IEC 529 IP65
Pollution Degree 2
Paint
Polyurethane
Cover Gasket-
Rubber
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