Functional safety manual –Series 2000 and Hydrobar-I
SM-EN-2000/09-2013/01 Page 2
1. Functional Safety
1.1 Scope
This safety manual applies to measuring systems consisting of Klay Instruments pressure transmitter
in a two wire 4-20 mA loop.
This functionally safety manual applies for:
Series 2000, 2000-SAN, CER-2000, 2000-SAN Cable, 2000-Hydrobar Cable and Hydrobar-I-Cable
The series 2000 with a serial number of the transmitter > 4309036
The Hydrobar-I with a serial number of the transmitter > 7309014
Software from Rev. V9.17
1.2 Application area
The measuring system can be used for process pressure or level measurement of gases, vapours and
liquids which meet the specific requirements of the safety technology.
1.3 Safety function
The device generates an analogue output signal of 4-20 mA that is proportional to the current pressure.
This is controlled by a micro processing unit and has to be distinguished between 4-20 mA. The fault
current is ≤3.9 mA or > 20.8 mA. Observe with the conception of the system, that the technical data of the
product-specific as well as Functional Safety Data Sheet may not be exceeded. Especially the permissible
operating condition (permissible temperatures, etc.) have to be ensured.
Make sure that the entire interconnection of different components fulfills the requirements
of the application. The operator is responsible for correct construction of the overall system.
After installation a validation of the safety function is required.
The damping of the output signal must be adapted to the process safety time.
The operability of the measuring device should be checked via proof test in regularly intervals. For
defining the scope and interval of tests, the following table can be used as a reference. However
each application has its own unique properties and exceptions. Klay Instruments is not an expert
in the customers process (technical field) and does not accept liability for consequential damage
of any kind due to use or misuse of the Series 2000 and Hydrobar I.
Chemical and Petrochemical
