142
SAW sensor - Maintenance
Type 8098
15.11
Calibrating the offset value of the liquid temperature
Instead of calibrating the offset value of the liquid temperature, you can directly enter it. See chpt.
Setting the offset value of the liquid temperature
To calibrate the offset value of the liquid temperature, do the following:
→
Make sure a reference temperature sensor is installed in the same pipe as the FLOWave and as near as
possible to the FLOWave.
→
Charge the pipe.
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Select the device in the navigation area.
→
SAW sensor
→
Maintenance
→
Calibration
→
Stand. meas. values
→
Temperature
→
Offset
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Make sure the calibration conditions (liquid temperature and ambient temperature) are the same as for
the usual measuring conditions.
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Make sure the temperature of the liquid is constant and stable during the calibration procedure.
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Temper. cal. by ref.
The current offset is displayed.
→
Start the calibration procedure.
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After 30 s, enter the average value of the liquid temperature that has been measured by the reference
temperature sensor.
The new settings are displayed.
→
Finish
The new temperature offset is used.
If the calibration fails, a message is displayed. Refer to chpt.
19.9 Messages due to calibration or simulation.
The calibration can fail due to the following causes:
• the calculated offset value is higher than
±
10 °C
•
the integrated temperature sensor is defective
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