Siemens SITRANS P Betriebsanleitung Seite 120

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7.7 Electrical damping
Description
You can set the time constant of electrical damping to a point within a range from 0 to 100 s.
It always applies to the "Pressure" device variable (DV0) and thus to the measured values
derived from it.
7.8 Fast response mode
Description
This mode is only intended for special applications such as fast recognition of jumps in
pressure, e.g. pressure drop in the event of pipe breakage. The internal recording of measured
values is sped up at the cost of accuracy. From your point of view, an increased low-frequency
noise is caused for the measured value. For this reason, good accuracy can only be achieved
by setting the measuring span to the maximum.
7.9 Current sensor
Description
The transmitter can be switched to constant current operation for test purposes. In that case,
the current no longer corresponds to the process variable. A "C" will appear in the mode display
of the display.
7.10 Fault current
Description
You can use this function to set the size of the lower (< 4 mA) and upper (> 20 mA) fault current.
Both signal a hardware/firmware fault, sensor breakage, or that the alarm limit has been
reached (diagnostic interrupt). ERROR will in this case appear in the display. You can obtain
a detailed guide to the display using SIMATIC PDM or the HART Communicator.
Reference
NAMUR recommendation NE43 dated 03.02.2003
"Standardization of the signal level for the breakdown information of digital transmitters"
Operating functions through HART
7.10 Fault current
SITRANS P, DS III series with HART
118 Operating Instructions, 09/2012, A5E00047092-08
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