Справочник Пользователя для FMC Corporation - Talstar 80
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.
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).
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