FMC Corporation - Talstar 80 - Handbuch (Seite 94)

Technical data Proline Promass 80 PROFIBUS PA
94
Zero point stability (Promass E, H, S, P):
Zero point stability (Promass I):
Sample calculation
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Fig. 41: Maximum measured error in % of reading (example: Promass 80 F, M / DN 25)
Calculation example (mass flow, liquid):
Given: Promass 80 F / DN 25, flow = 8000 kg/h
Max. measured error: ±0.10% ± [(zero point stability ÷ measured value) · 100]% o.r.
Max. measured error
→ ±0.10% ±0.54 kg/h ÷ 8000 kg/h · 100% = ±0.107%
DN
Max. full scale value Zero point stability
[kg/h] [lb/min] [kg/h] [lb/min]
8 3/8" 2000 73.5 0.200 0.007
15 ½" 6500 238 0.650 0.024
25 1" 18000 660 1.80 0.066
40 1½" 45000 1650 4.50 0.165
50 2" 70000 2570 7.00 0.257
DN
Max. full scale value Zero point stability
[kg/h] [lb/min] [kg/h] [lb/min]
8 3/8" 2000 73.5 0.150 0.006
15 1/2" 6500 238 0.488 0.018
15 FB 1/2" FB 18000 660 1.350 0.050
25 1" 18000 660 1.350 0.050
25 FB 1" FB 45000 1650 3.375 0.124
40 1 ½" 45000 1650 3.375 0.124
40 FB 1 ½" FB 70000 2570 5.250 0.193
50 2" 70000 2570 5.250 0.193
50 FB 2" FB 180000 6600 13.500 0.495
80 3" 180000 6600 13.500 0.495
FB = Full bore versions of Promass I
0
±0.5
±0.2
±1.0
[%]
0 2 4 6 8 10 12 14 16 18 t/h