Proline Promass 84F, 84M
Hauser
13
Sample calculation
a0004604
Maximum measured error in % of reading (example: Promass 84F / DN 25)
Calculation example (mass flow, liquid):
Given: Promass 84F / DN 25, measured value flow = 8000 kg/h
Max. measured error: ±0.10% ± [(zero point stability ÷ measured value) · 100]% o.r.
Maximum measured error
→
±0.10% ± 0.54 kg/h ÷ 8000 kg/h · 100% = ±0.107%
Density (liquid)
• Standard calibration (1g/cc = 1 kg/l)
– Promass F: ±0.01 g/cc
– Promass M: ±0.02 g/cc
• Special density calibration (optional), not for high temperature version
– Promass F: ±0.001 g/cc
– Promass M: ±0.002 g/cc
• After field density calibration or under reference conditions
– Promass F: ±0.0005 g/cc
– Promass M: ±0.0010 g/cc
Temperature
±0.5 °C ±0.005 · T (T = fluid temperature in °C)
Repeatability
Mass flow (liquid):
±0.05% ± [½ · (zero point stability ÷ measured value) · 100]% o.r.
Mass flow (gas):
±0.25% ± [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: ±0.10% ± [½ · (zero point stability ÷ measured value) · 100]% o.r.
o.r. = of reading
Zero point stability: see "Max. measured error"
Calculation example (mass flow, liquid):
Given: Promass 84F / DN 25, measured value 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%
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18 t/h
