FMC Corporation - Talstar 80 - Handbuch (Seite 96)

Technical data Proline Promass 80 PROFIBUS PA
96
Mass flow (gas):
Promass F, M, A, I, S, P:
±0.25% ± [½ · (zero point stability ÷ measured value) · 100]% o.r.
Promass E:
±0.35% ± [½ · (zero point stability ÷ measured value) · 100]% o.r.
Volume flow (liquid):
Promass F:
±0.05% ± [½ · (zero point stability ÷ measured value) · 100]% o.r.
Promass M, A:
±0.10% ± [½ · (zero point stability ÷ measured value) · 100]% o.r.
Promass E, H, I, S, P:
±0.20% ± [½ · (zero point stability ÷ measured value) · 100]% o.r.
o.r. = of reading
Zero point stability: see "Max. measured error"
→ Page 92 ff.
Calculation example (mass flow, liquid):
Given: Promass 80 F / DN 25, flow = 8000 kg/h
Repeatability: ±0.05% ± [½ · (zero point stability ÷ measured value) · 100]% o.r.
Repeatability
→ ±0.05% ± ½ · 0.54 kg/h ÷ 8000 kg/h · 100% = ±0.053%
Density measurement (liquid)
1 g/cc = 1 kg/l
Promass F:
±0.00025 g/cc
Promass M, H, E, A, S, P:
±0.0005 g/cc
Promass I:
±0.001 g/cc
Temperature measurement
±0.25 °C ± 0.0025 · T (T = fluid temperature in °C)
(±0.5 °F ± 0.0015 · (T – 32), T = fluid temperature in °F)
Influence of medium
temperature When there is a difference between the temperature for zero point adjustment and the process
temperature, the typical measured error of the Promass sensor is ±0.0002% of the full scale
value / °C (±0.0001% of the full scale value / °F). The typical measured error of the Promass E
sensor is ±0.0003% of the full scale value / °C (±0.0002% of the full scale value / °F).