Endress+Hauser Proline Promass Q 500, Руководство по эксплуатации

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Technical data Proline Promass Q 500 PROFIBUS PA
246 Hauser
Recommended measuring range
"Flow limit" section →  260
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
Various pressure transmitters and temperature measuring devices can be ordered
from Hauser: see "Accessories" section →  242
It is recommended to read in external measured values to calculate the following measured
variables for gases:
• Mass flow
• Corrected volume flow
Current input
The measured values are written from the automation system to the measuring device via
the current input →  246.
Digital communication
The measured values are written from the automation system to the measuring device 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)
Open-circuit voltage ≤ 28.8 V (active)
Possible input variables • Pressure
• Temperature
• Density
Status input
Maximum input values • DC –3 to 30 V
• If status input is active (ON): R
i
>3 kΩ
Response time Adjustable: 5 to 200 ms
Input signal level • Low signal: DC –3 to +5 V
• High signal: DC 12 to 30 V
Assignable functions • Off
• Reset the individual totalizers separately
• Reset all totalizers
• Flow override