Endress+Hauser Hart Cerabar PMP71B, Руководство по эксплуатации

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Operation Cerabar PMP71B HART
50 Hauser
10.3.1 Sensor calibration
2)
In the course of their life cycle, pressure sensors can deviate, or drift,
3)
from the original
pressure characteristic curve. This deviation is caused by physical factors and can be
corrected with a sensor calibration.
Absolute pressure sensors cannot be recalibrated.
Perform the sensor calibration. Adhere to the sequence indicated!
1. Apply the lower pressure value to the device.
2. Enter the value for 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 calibration.
3. Apply the upper pressure value to the device.
4. Enter the value for the
Upper sensor trim parameter. Application → Sensor → Sensor
calibration → Upper sensor trim
 The value entered causes a change in the slope or a parallel shift of the current
calibration curve.
A
B
A
B
A
B
1. 2.
3. 4.
A
B
A0045038
A Pressure display
B Pressure input
2) Not possible with display.
3) Deviations caused by physical factors are also known as "Sensor drift".