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Original characteristic
B
Characteristic after the one-point calibration of the low calibration point
9.4.5.3
Setting two-point calibration
Requirement
• The measured values for the high and low calibration point are stable.
• There is no sensor error.
• The measured values are in the measuring range.
Procedure
1. Select the menu command "Maintenance > Calibration".
2. Select the tab input 1 or input 2.
3. Bring the sensor to a stable temperature environment. For example, 0 °C.
The fluctuation of the measured value is within the precision requirements.
4. Click the "Two-point calibration" button.
5. Confirm the warnings.
6. When your measured value is stable, assign the measured value to the low calibration point
of the device.
7. Repeat the process for the high calibration point.
Parameter assignment
9.4 Assigning parameters using remote operation
SITRANS TH100/TH320/TH420/TR320/TR420/TF320/TF420 with 4 to 20 mA/HART
164
Operating Instructions, 05/2020, A5E41864807-AB
