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Electrical connection
In the case of weld-in connections, exercise the necessary degree of care when performing the
welding work on the process side:
1.
Use suitable welding material.
2.
Flush-weld or weld with welding radius ≥ 3.2 mm (0.13 in).
3.
Avoid crevices, folds or gaps.
4.
Ensure the surface is mechanically polished, Ra ≤ 0.76 µm (30 µin).
Pay attention to the following when installing the thermometer to ensure that the cleanability
is not affected:
1.
The installed sensor is suitable for CIP (cleaning in place). Cleaning is carried out in
combination with tubing/piping or tank/vessel. In the case of internal tank fixtures
using process connection nozzles, it is important to ensure that the cleaning assembly
sprays this area directly so that it is cleaned properly.
2.
The Varivent® connections enable flush-mounted installation.
NOTICE
The following action must be taken if a sealing ring (O-ring) or seal fails:
‣
The thermometer must be removed.
‣
The thread and the O-ring joint/sealing surface must be cleaned.
‣
The sealing ring or seal must be replaced.
‣
CIP must be performed after installation.
5
Electrical connection
5.1
Connecting requirements
5.1.1
DC voltage version with M12x1 connector
According to the 3-A Sanitary Standard and EHEDG electrical connecting cables must be
smooth, corrosion-resistant and easy to clean.
12
Temperature switch OTR31, OTR35
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