10 Technical data Promass 40
54 Endress+Hauser
Repeatability Flow measurement
• Mass flow (liquid):
±0.25% ± [1/2 x (zero point stability / measured value) x 100]% o.r.
• Mass flow (gas):
±0.5% ± [1/2 x (zero point stability / measured value) x 100]% o.r.
• Volume flow (liquid):
±0.35% ± [1/2 x (zero point stability / measured value) x 100]% o.r.
o.r. = of reading
Zero point stability: see “Max. measured error”
Calculation example (mass flow, liquid):
Given: Promass 40 E, DN 25, flow = 8000 kg/h
Repeatability: ±0.25% ± [1/2 x (zero point stability / measured value) x 100]% o.r.
Repeatability
→ ±0.25% ± 1/2 ⋅ = ±0.261%
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 ±0.0003% of
the full scale value / °C.
Influence of medium
pressure
The effect on accuracy of mass flow due to a difference between calibration pressure
and process pressure is negligible in the DN 8 ...40 range.
At DN 50 the effect is -0.009% o.r. / bar (o.r. = of reading).
10.1.7 Operating conditions (installation)
Installation instructions see Page 10 ff.
Inlet and outlet runs There are no installation requirements regarding inlet and outlet runs.
System pressure see Page 11
10.1.8 Operating conditions (environment)
Ambient temperature –20...+60 °C (sensor, transmitter)
Install the device at a shady location. Avoid direct sunlight, particularly in warm climatic
regions.
Storage temperature –40...+80 °C (preferably +20 °C)
Degree of protection Standard: IP 67 (NEMA 4X) for transmitter and sensor
Shock resistance According to IEC 68-2-31
Vibration resistance Acceleration up to 1 g, 10...150 Hz, following IEC 68-2-6
Electromagnetic
compatibility (EMC)
To EN 61326 and NAMUR recommendation NE 21
0.9 kg/h
8000 kg/h
-------------------------- -
100 %⋅
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