Application; Major Features; Mode Of Operation - Siemens sitrans p Operating Instructions Manual

Operating Instructions

Application

The SITRANS P Compact transmitter converts pressures into a load-independent current of e.g. 4 to
20 mA at high accuracy. It has been developed for the special requirements of the
food/pharmaceutical/biotechnology industries.
Particular value has been placed on a high surface quality. It is therefore possible, for example, to
guarantee roughness values down to Ra = 0.4 µm (1.57
seam range: Ra < 0.8 µm (3.15
important feature is the hygiene-based design of the process connection by means of various aseptic
connections.
The completely welded stainless steel housing (optionally also with plug or cable outlet) can be designed
up to degree of protection IP67, and is therefore easy and safe to clean.
Using appropriate thermal decouplers, the transmitter can be used for process temperatures up to 200 °C
(392 °F).

Major features

•
Measuring ranges from 0 to 160 mbar (0 to 2.32 psi) up to 0 to 40 bar (0 to 580 psi)
•
Linearity error including hysteresis < +0.2% of full-scale value
•
Piezo-resistive measurement system, vacuum-proof and overload-proof
•
Hygiene-based design according to EHEDG, FDA and GMP recommendations
•
Material and surface quality according to hygiene requirements
•
Wetted parts made of stainless steel; completely welded
•
Signal output 4 to 20 mA
•
Stainless steel housing with degree of protection IP65; IP67 as option
•
Process temperature up to 200 °C (392 °F)
•
Ex protection II2G EEx ib IIC T6 to ATEX

Mode of operation

The process pressure acts on a piezo-resistive semiconductor measuring bridge via a remote seal and a
transmission liquid. The transmitter converts the pressure values into a load-independent current.
A compensation network makes the output signal largely independent of the ambient temperature. As a
result of a specially adapted remote seal connection with minimized volume, the influence of the process
temperature on the output signal is greatly reduced compared to a conventional screw connection.
The electronics is potted to protect it against moisture, corrosive atmospheres and vibration.
The pressure transmitters can be powered with a non-regulated DC voltage of 10 to 30 V. Output signals
common to measuring technology are available.
SITRANS P Compact
A5E00240593-01
10 inch)). The system can be electro polished in addition. A further
·
-8
10 inch) in the wetted area it required (welded
· -8
31