KROHNE OPTIBAR DP 7060 C EN - Manual (Page 62)

7
TECHNICAL DATA
62
OPTIBAR DP 7060 C
www.krohne.com 04/2014 - 4003292001 - MA OPTIBAR DP 7060 C R01 en
Technical data
7.1 Measuring principle
The process pressure is transferred via the separating metallic diaphragms 6 of the high and
low pressure side and the fill fluid 1 to the piezoresistive silicon sensor. Through the prevailing
pressure differential, the silicon diaphragm of the differential pressure sensor 4 is deflected
and changes the resistance value of the four piezoresistive elements in the bridge circuit. The
change in resistance of the bridge circuit is proportional to the differential pressure.
Additionally, the measured cell temperature 2 and the prevailing static pressure 3 on the low
pressure side is measured and then made available to the signal converter for further
processing. If the measurement limit is exceeded, the overload system 5 restricts the prevailing
process pressure at the differential pressure sensor and protects it from damage.
1 Fill fluid
2 Temperature sensor
3 Absolute pressure sensor
4 Differential pressure sensor
5 Overload system
6 Separating diaphragm
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