Proline Promass O 300
Hauser
11
Recommended measuring range
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
Input and output versions
External measured values
To increase the 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
device:
• Operating pressure to increase accuracy (Hauser recommends the use of a pressure
measuring device for absolute pressure, e.g. Cerabar M or Cerabar S)
• Medium temperature to increase accuracy (e.g. iTEMP)
• Reference density for calculating the corrected volume flow for gases
Various pressure transmitters and temperature measuring devices can be ordered from Endress
+Hauser: see "Accessories" section → 92
It is recommended to read in external measured values to calculate the corrected volume flow.
HART protocol
The measured values are written from the automation system to the measuring device via the HART
protocol. The pressure transmitter must support the following protocol-specific functions:
• HART protocol
• Burst mode
Current input
The measured values are written from the automation system to the measuring device via the
Digital communication
The measured values can be written from the automation system to the measuring via:
• FOUNDATION Fieldbus
• PROFIBUS DP
• PROFIBUS PA
• Modbus RS485
• EtherNet/IP
• PROFINET
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)
Open-circuit voltage
≤ 28.8 V (active)
Possible input variables
• Pressure
• Temperature
• Density
Содержание Proline Promass O 300
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