Siemens SITRANS FC430 Operating Instructions Manual page 386

Glossary
NAMUR
Normenarbeitsgemeinschaft für Meß- und Regeltechnik in der Chemischen Industrie
(NAMUR). NAMUR is a group representing the interests of the chemical industry which
create standards for instrumentation and electrical devices used in industrial plants.
PED
The Pressure Equipment Directive (97/23/EC) is the legislative framework on European level
for equipment subject to a pressure hazard. It was adopted by the European Parliament and
the European Council in May 1997 and has been obligatory throughout the European Union
since May 2002.
Plato
Plato is a measure of the weight of sucrose dissolved in water. It is expressed in degrees (%
by mass).
Zero point adjustment
In order to measure accurately with a measuring instrument it is important that zero and gain
have been calibrated. All Coriolis sensors are calibrated before they are sent out to
customers. However, Coriolis sensors are very sensitive, and several factors might move the
zero point, e.g installation, pressure, temperature and even very small vibrations coming
from the process. All these factors are customer specific and can't be simulated at the
factory. Therefore Siemens recommends to carry out a zero point adjustment before use.
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Operating Instructions, 05/2015, A5E03361511-AF
FC430 with HART