Siemens SITRANS P - Manual (Page 28)

SITRANS P measuring instruments for pressure
Transmitters for food, pharmaceuticals and biotechnology
SITRANS P300 for gage and absolute pressure
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Overview
The SITRANS P300 is a digital pressure transmitter for gage and
absolute pressure. All conventional thread versions are available
as process connections. In addition, various hygiene-based
connections and flange connections with front-flush diaphragms
meet the requirements of a dead space free process connec-
tion.
The output signal is a load-independent direct current from 4 to
20 mA or a PROFIBUS PA signal, which is linearly proportional to
the input pressure. Communication is over HART protocol or
over PROFIBUS PA interface. Convenient buttons for easy local
operation of the basic settings of the pressure transmitter.
The SITRANS P300 has a single-chamber stainless steel casing.
The pressure transmitter is approved with "intrinsically safe" type
of protection It can be used in zone 1 or zone 0.
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Benefits
• High quality and long life
• High reliability even under extreme chemical and mechanical
loads
• Extensive diagnosis and simulation functions
• Minimum conformity error
• Small long-term drift
• Wetted parts made of high-grade materials (such as stainless
steel, Hastelloy)
• Measuring range 8 mbar to 400 bar
• High measuring accuracy
• Parameterization over control keys and HART communication
or PROFIBUS PA communication
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Application
The pressure transmitter is available in versions for gage pres-
sure and for absolute pressure. The output signal is always a
load-independent direct current from 4 to 20 mA or a
PROFIBUS PA signal, which is linearly proportional to the input
pressure. The pressure transmitter measures aggressive, non-
aggressive and hazardous gases, as well as vapors and liquids.
It can be used for the following measurement types:
• Gage pressure
• Absolute pressure
With appropriate parameter settings, it can also be used for the
following additional measurement types:
• Level
• Volume
• Mass
The "intrinsically-safe" EEx version of the transmitter can be in-
stalled in hazardous areas (zone 1). The transmitters are pro-
vided with an EC type examination certificate and comply with
the respective harmonized European standards of ATEX.
Gage pressure
This variant measures aggressive, non-aggressive and hazard-
ous gases, vapors and liquids.
The smallest measuring span is 10 mbar g, the largest 400 bar g.
Level
With appropriate parameter settings, the gage pressure variant
measures the level of aggressive, non-aggressive and hazard-
ous liquids.
For measuring the level in an open container you require one de-
vice; for measuring the level in a closed container, you require
two devices and a process control system.
Absolute pressure
This variant measures the absolute pressure of aggressive, non-
aggressive and hazardous gases, vapors and liquids.
The smallest measuring span is 8 mbar a, the largest 30 bar a.
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