Endress+Hauser Proline Promass 84 MODBUS RS485 Operating Instructions Manual page 100

Technical data
100
Flow values (example)
Turn down
250:1
100:1
25:1
10:1
2:1
o.r. = of reading; Design fundamentals → ä 100
Repeatability
Design fundamentals → ä 100
o.r. = of reading; 1 g/cc = 1 kg/l; T = medium temperature
• Mass flow and volume flow (liquids): ±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
A difference in pressure between the calibration pressure and the process pressure does not have
any effect on the accuracy.
Design fundamentals
Dependent on the flow:
• Flow ≥ Zero point stability ÷ (Base accuracy ÷ 100)
– Max. measured error: ±Base accuracy in % o.r.
– Repeatability: ± ½ · Base accuracy in % o.r.
• Flow < Zero point stability ÷ (Base accuracy ÷ 100)
– Max. measured error: ± (Zero point stability ÷ measured value) · 100% o.r.
– Repeatability: ± ½ · (Zero point stability ÷ measured value) · 100% o.r.
o.r. = of reading
Base accuracy for
Mass flow liquids
Volume flow liquids
Mass flow gases
Proline Promass 84 MODBUS RS485
Flow
[kg/h] [lb/min.]
0.4 0.0147
1.0 0.0368
4,0 0.1470
10 0.3675
50 1.8375
Max. measured error
[% o.r.]
1.250
0.500
0.125
0.100
0.100
0.10
0.10
0.50
Endress+Hauser