Endress+Hauser Proline Cubemass C 300, Руководство по эксплуатации

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Proline Cubemass C 300 Technical data
Hauser 179
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 →  195
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 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 and temperature measuring devices can be ordered from Endress
+Hauser: see "Accessories" section →  176
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 current input →  179.
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