Endress+Hauser Proline Promass E 500 - Page 264

Technical data Proline Promass E 500 PROFIBUS PA
264 Endress+Hauser
DN x
[mm] [in] [kg/m
3
]
40 1½ 125
50 2 125
80 3 155
If calculating the full scale value using the two formulas:
1. Calculate the full scale value with both formulas.
2. The smaller value is the value that must be used.
Recommended measuring range
Flow limit →  280
Operable flow range Over 1000 : 1.
Flow rates above the preset full scale value do not override the electronics unit, with the
result that the totalizer values are registered correctly.
Input signal External measured values
To increase the measurement accuracy of certain measured variables or to calculate the
corrected volume flow for gases, the automation system can continuously write different
measured values to the measuring instrument:
• Operating pressure to increase measurement accuracy (Endress+Hauser recommends
the use of a pressure measuring device for absolute pressure, e.g. Cerabar M or Cerabar
S)
• Medium temperature to increase measurement accuracy (e.g. iTEMP)
• Reference density for calculating the corrected volume flow for gases
Various pressure and temperature measuring devices can be ordered from Endress
+Hauser: see "Accessories" section →  261
It is recommended to read in external measured values to calculate the corrected volume
flow.
Current input
The measured values are written from the automation system to the measuring device via
the current input →  264.
Digital communication
The measured values are written by the automation system via PROFIBUS PA.
Current input 0/4 to 20 mA
Current input 0/4 to 20 mA (active/passive)
Current span • 4 to 20 mA (active)
• 0/4 to 20 mA (passive)
Resolution 1 µA
Voltage drop Typically: 0.6 to 2 V for 3.6 to 22 mA (passive)
Maximum input voltage ≤ 30 V (passive)