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5. Commissioning, operation
5.2.1 Installation regulations for self-draining
α
Due to the sensor tube geometry, the self-draining of liquid media is only fulfilled if
the maximum deflection β for the gradient of angle α is observed. The design basis is
the EHEDG guideline Doc. 8. This means that the ASME BPE-2019 standard, Table
SD-2.4.3.1-1, is also complied with.
5.3 Electrical mounting
Personnel: Skilled electrical personnel
CAUTION!
Damage to the instrument
When working on open electric circuits (PCBs) there is a risk of damaging
sensitive electronic components through electrostatic discharge.
▶
The correct use of grounded working surfaces and personal armbands is
required.
5.3.1 Requirements for connection cable
Use and assemble connection cable that is suitable for the application. For cables with
■
flexible wires, always use ferrules appropriate for the wire cross-section.
For the application (outdoor installation or cable length > 30 m), it is mandatory to use
■
a shielded cable and connect both ends of the shield. Within the instrument, the shield
must be connected with the ground terminal. Connecting the shield with the cable
bushing is not sufficient.
If electromagnetic radiation exceeds the test values per EN 61326, it is mandatory to
■
use a shielded cable.
When using an M12 x 1 (4-pin) circular connector, the mating connector is supplied by
■
the customer. Ensure the matching design from the connector manufacturer.
→ See chapter 15, table "Electrical connections"
WIKA operating instructions, model DMSU22SA
Gradient α
≥ 3°
≥ 4°
≥ 5°
≥ 6°
≥ 7°
≥ 8°
≥ 9°
≥ 10°
β
≥ 15°
≥ 20°
≥ 27°
Displacement β
≤ ± 0°
≤ ± 10°
≤ ± 13°
≤ ± 17°
≤ ± 20°
≤ ± 22°
≤ ± 24°
≤ ± 26°
≤ ± 35°
≤ ± 45°
≤ ± 26°
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