FMC Corporation - Talstar 80 - Handbuch (Seite 97)

Proline Promass 80 PROFIBUS PA Technical data
97
Influence of medium pressure The following section shows the effect on accuracy of mass flow due to a difference between
calibration pressure and process pressure.
Promass F, M:
Promass E:
With nominal diameters DN 8 to 40 (3/8" to 1½"), the effect on accuracy of mass flow due to a
difference between calibration pressure and process pressure is negligible.
At DN 50 (2"), the effect is –0.009% o.r. / bar (–0.006% v.M. / psi) (o.r. = of reading).
Promass A:
A difference between calibration pressure and process pressure has no effect on measuring accuracy.
Promass H:
DN
Promass F,
Promass F high-temperature Promass M Promass M, high pressure
[% o.r./bar] [% o.r./psi] [% o.r./bar] [% o.r./psi] [% o.r./bar] [% o.r./psi]
8 3/8" No influence 0.009
−0.0006
0.006 0.0004
15 ½" No influence 0.008 −0.0005 0.005 0.0003
25 1" No influence 0.009
−0.0006
0.003 0.0002
40 1½" −0.003 −0.0002 0.005 −0.0003 − −
50 2"
−0.008 −0.0005
No influence
− −
80 3" −0.009 −0.0006 No influence − −
100 4" −0.012 −0.0008 − − − −
150 6" −0.009 −0.0006 − − − −
250 10" −0.009 −0.0006 − − − −
o.r. = of reading
DN [% o.r./bar] [% o.r./psi]
8 3/8" –0.017 –0.0012
15 ½" –0.021 –0.0014
25 1" –0.013 –0.0019
40 1½" –0.018 –0.0012
50 2" –0.020 –0.0014