Remote Seal; System Configuration - Siemens SITRANS Series Operating Instructions Manual

4.5

Remote seal

Product description
● A remote seal measuring system comprises the following elements:
– Remote seal
– Transmission line, e.g. capillary line
– Pressure transmitter.
● The measuring system based on a hydraulic principle is used to transfer pressure.
● The capillary line and the remote seal diaphragm are the most sensitive components in the
remote seal measuring system. The material thickness of the remote seal diaphragm is
only ∼ 0.1 mm.
● The smallest of leakages in the transmission system leads to the loss of transmission fluid.
● The loss of transmission fluid results in inaccuracies in the measurement and failure of the
measuring system.
● In order to avoid leaks and measuring errors, please observe the installation and
maintenance instructions in addition to the safety notes.
Use of a remote seal in devices with functional safety
Remote seals were not considered in the evaluation of the devices with regard to functional
safety.
For more information on evaluating the functional safety of your application, contact Technical
Support.
4.6

System configuration

Overview
The pressure transmitter can be used in a number of system configurations:
● As a stand-alone version, supplied with the necessary auxiliary power
● As part of a complex system environment, e.g. SIMATIC S7
SITRANS P320/P420 (mA/HART)
Operating Instructions, 06/2018, A5E44852162-AA
Note
Malfunction of the remote seal measuring system
If you separate the components of the remote seal measuring system, this results in
malfunctioning of the system.
Do not separate the components under any circumstances.
WARNING
Description
4.6 System configuration
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