1. Flush out any gases and obtain stable temperature conditions by running flow at operational
conditions (pressure and temperature) for minimum 30 minutes.
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Figure 6-2
Best practice zero point adjustment with a by-pass line and two shut-off devices
2. Close the outlet shut-off valve while maintaining the system pressure. If bypass flow is
necessary, open the bypass valve. If the pressure can be increased by 1 to 2 bars with
stopped flow, this should be applied.
3. Wait 1 to 2 minutes for the system to settle, and then perform zero adjustment. Waiting
longer can change the temperature.
4. During the process a progress bar is visible in the HMI display.
5. At the end of the zero adjustment, the outcome is displayed as an offset and a standard
deviation.
Note
If you get an error message after the zero point adjustment, refer to Zero point adjustment
Commissioning
6.3 Local commissioning via HMI
SITRANS FC330
Operating Instructions, 01/2019, A5E44030648-AB
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