Endress+Hauser Proline Promass 84 MODBUS RS485 Operating Instructions Manual page 102

Technical data
102
Example for max. measured error
[%]
±1.0
±0.5
±0.2
0
0 2
Fig. 51: Max. measured error in % o.r. (example: Promass F, DN 25)
Flow values (example)
Turn down
[kg/h] or [l/h]
500 : 1
100 : 1 180
25 : 1 720
10 : 1 1800
2 : 1 9000
o.r. = of reading; Design fundamentals → ä 103
Repeatability
Design fundamentals → ä 103.
o.r. = of reading; 1 g/cc = 1 kg/l; T = medium temperature
• Mass flow and volume flow (liquids):
±0.025% o.r. (PremiumCal, for mass flow)
±0.05% o.r.
• Mass flow (gases): ±0.25% o.r.
• Density (liquids): ±0.00025 g/cc
• Temperature: ±0.25 °C ± 0.0025 · T °C; (±0.5 °F ± 0.0015 · (T–32) °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 sensor is ±0.0002% of the full scale value / °C
(±0.0001% of the full scale value/°F).
Influence of medium pressure
The table below shows the effect on accuracy of mass flow due to a difference between calibration
pressure and process pressure.
4 6 8 10
Flow
[lb/min]
36 1.323
6.615
26.46
66.15
330.75
Proline Promass 84 MODBUS RS485
12 14 16 18 t/h
Maximum measured error
[% o.r.]
1.5
0.3
0.1
0.1
0.1
Endress+Hauser
a0004604