Note
Firmware update
FW update is to be done only by authorized and trained service personnel.
10.3.3 Troubleshooting sensor-related problems
Incorrect and unstable measurements, especially at low flows, are typically a result of an
unstable zero point due to:
● Incorrect installation
● Bubbles in the liquid
● Vibrations or cross talk
● Solid particles settling in the liquid
Follow the 4-step guide to troubleshooting:
Step 1 Preliminary application inspection (Page 190)
Step 2 Zero point adjustment (Page 190)
Step 3 Measurement error calculation (Page 190)
Step 4 Application improvement (Page 190)
The guide enables you to trace the reason for incorrect measurements and to improve the
application.
Step 1: Inspecting the application
Ensure that:
1. The sensor is installed as described in Installing/mounting (Page 37).
2. The sensor is located in a vibration-free position. Vibrations can disturb the sensor and
therefore cause measurement error.
Diagnostics and troubleshooting
10.3 Operation troubleshooting
SITRANS FC330
190 Operating Instructions, 01/2019, A5E44030648-AB
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