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Reference Manual
00809-0100-4860, Rev BC
Appendix A: Reference Data
January 2013
Specifications and Reference Data
The Reynolds number equation shown below combines the effects of density (), viscosity (
cp
), pipe
inside diameter (D), and flow velocity (V).
Process temperature limits
Standard
-58 to 482 °F (–50 to 250 °C)
Output signals
4–20 mA digital HART signal
Superimposed on 4–20 mA signal
Optional scalable pulse output
0 to 10000 Hz; transistor switch closure with adjustable scaling via HART communications;
capable of switching up to 30 Vdc, 120 mA maximum.
Table A-1. Minimum Measurable Meter Reynolds Numbers
Meter Sizes
(Inches / DN)
Reynolds Number
Limitations
1 through 4/25 through
100
5000 minimum
6 through 8/150 through
200
Table A-2. Minimum Measurable Meter Velocities
(1)
(1) Velocities are referenced to schedule 40 pipe.
Feet per Second
Meters per
Second
Liquids
Gases
The is the process fluid density at flowing
conditions in lb/ft
3
for ft/s and kg/m
3
for m/s
Table A-3. Maximum Measurable Meter Velocities
(1)
(Use the smaller of the two values)
(1) Velocities are referenced to schedule 40 pipe.
Feet per Second Meters per Second
Liquids
Gases
The is the process fluid density at flowing
conditions in lb/ft
3
for ft/s and kg/m
3
for m/s
R
D
VD
cp
------------=
36/
54/
36/
54/
90,000/ or 25
134,000/ or 7.6
90,000/ or 250
134,000/ or 76