Sensor calibration at the high calibration point
1. Use remote control (e.g. SIMATIC PDM) to select the menu command "Device > Sensor
calibration".
2. Apply the pressure for the high calibration point at the device.
The high calibration point needs to be greater than the low calibration point.
3. Apply the pressure value that you have created and assign the pressure value to the device.
The device applies the set value.
The device carries out an offset correction of the characteristic curve.
The low calibration point is not affected by this.
Result
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,QFOLQHFKDQJH
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SUHVVXUHS
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FDOLEUDWLRQSRLQW
+LJK
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%
&
$%
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A
Original characteristic
B
Characteristics after sensor calibration at the low calibration point
C
Characteristics after sensor calibration at the high calibration point
9.3.7
Digital-to-analog converter trim (DAC trim)
Introduction
The current that is output by the device can be trimmed independently of the measuring circuit.
This function is designed for compensating inaccuracies in the processing chain following the
device.
Parameter assignment
9.3 Parameter assignment over remote operation
SITRANS P320/P420 with 4 to 20 mA/HART
152
Operating Instructions, 11/2019, A5E44852162-AC