Deltabar PMD78B PROFINET with Ethernet-APL Operation
Endress+Hauser 63
10.3.1 Sensor calibration
1)
In the course of their life cycle, pressure sensors can deviate, or drift,
2)
from the original
pressure characteristic curve. This deviation depends on the operating conditions and can
be corrected in the Sensor calibration submenu.
Set the value of the zero point shift to 0.00 before the Sensor calibration. Application
→ Sensor → Sensor calibration → Zero adjustment offset
1. Apply the lower pressure value (value measured with pressure reference) to the
device. Enter this pressure value in the Lower sensor trim parameter. Application
→ Sensor → Sensor calibration → Lower sensor trim
The value entered causes a parallel shift of the pressure characteristic in relation
to the current Sensor calibration.
2. Apply the upper pressure value (value measured with pressure reference) to the
device. Enter this pressure value in the Upper sensor trim parameter. Application
→ Sensor → Sensor calibration → Upper sensor trim
The value entered causes a change in the slope of the current Sensor calibration.
A0052045
The accuracy of the pressure reference determines the accuracy of the device. The
pressure reference must be more accurate than the device.
1) Not possible with display.
2) Deviations caused by physical factors are also known as "Sensor drift".
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