Proline Promass 80H, 83H
14
Hauser
Repeatability
Mass flow (liquid):
±0.05% ± [1/2
⋅
(zero point stability / measured value)
⋅
100]% o.r.
Volume flow (liquid):
±0.20% ± [1/2
⋅
(zero point stability / measured value)
⋅
100]% o.r.
o.r. = of reading
Zero point stability: see "Max. measured error"
→
Page 12 ff.
Calculation example (mass flow, liquid):
Given: Promass 83 H / DN 25, flow measured value = 8000 kg/h
Repeatability: ±0.05% ± [1/2
⋅
(zero point stability / measured value)
⋅
x 100]% o.r.
Repeatability: ±0.05% ±1/2
⋅
1.8 kg/h : 8000 kg/h
⋅
100% = ±0.061%
Density measurement (liquid)
1 g/cc = 1 kg/l
±0.0005 g/cc
Temperature measurement
±0.25 °C ±0.0025
⋅
T (T = fluid temperature in °C)
Influence of fluid 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.
Influence of fluid pressure
The table below shows the effect on accuracy of mass flow due to a difference between calibration pressure
and process pressure.
DN
% o.r./bar
8
–0.017
15
–0.021
25
–0.013
40
–0.018
50
–0.020
