Endress+Hauser Proline Cubemass C 300, Operating Instructions Manual

Page: 111 / 216

Proline Cubemass C 300 Commissioning
Hauser 111
Navigation
"Setup" menu → Advanced setup → Sensor adjustment
‣
Sensor adjustment
Installation direction →  111
‣
Zero verification →  111
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Zero adjustment →  113
Parameter overview with brief description
Parameter Description Selection Factory setting
Installation direction Select sign of flow direction. • Forward flow
• Reverse flow Forward flow
Zero point verification and zero adjustment
All measuring devices are calibrated in accordance with state-of-the-art technology.
Calibration takes place under reference conditions →  189. Therefore, a zero adjustment
in the field is generally not required.
Experience shows that zero adjustment is advisable only in special cases:
• To achieve maximum measuring accuracy even with low flow rates.
• Under extreme process or operating conditions (e.g. very high process temperatures or
very high-viscosity fluids).
To get a representative zero point, ensure that:
• any flow in the device is prevented during the adjustment
• the process conditions (e.g. pressure, temperature) are stable and representative
Zero point verification and zero adjustment cannot be performed if the following process
conditions are present:
• Gas pockets
Ensure that the system has been sufficiently flushed with the medium. Repeat flushing
can help to eliminate gas pockets
• Thermal circulation
In the event of temperature differences (e.g. between the measuring tube inlet and
outlet section), induced flow can occur even if the valves are closed due to thermal
circulation in the device
• Leaks at the valves
If the valves are not leak-tight, flow is not sufficiently prevented when determining the
zero point
If these conditions cannot be avoided, it is advisable to keep the factory setting for the zero
point.
Zero point verification
The zero point can be verified with the Zero verification wizard.