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5. Commissioning, operation
Protected against soot, vapour, dust, corrosive gases, coarse dirt and wide fluctua-
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tions in ambient temperature. Consider possible restrictions on the ambient tempera-
ture range caused by mating connector used.
5.1.2 Installation
The installation of the instrument must be carried out in accordance with the specifica-
tions of the respective process connection. Other installation types, e.g. direct welding,
are not permissible and are considered as improper use.
EN
Avoid any contact with or mechanical loading of the sensor tube. Scratches in the
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sensor tube (e.g. from sharp-edged objects) are the main points of attack for corrosion
and have a negative effect on the surface quality.
Remove production-related process materials before commissioning. See chapter
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12.2 "Cleaning wetted parts".
Sealing of the process connection
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Select suitable seal for the respective application and diaphragm seal version.
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Ensure cleanliness of the seal and the sealing face.
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Centre the seal on the sealing face.
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When using soft or PTFE seals, observe the instructions of the seal manufacturer,
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particularly with regard to tightening torque and load cycles.
For installation, the appropriate fastenings must be used. Mount these with the
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prescribed tightening torque.
All influences (reaction forces) of the pipeline (e.g. temperature changes, assembly
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forces) must be compensated before and after the measuring instrument in order to
avoid measured errors.
5.2 Mounting instructions for instruments with EHEDG and 3-A
Observe the following instructions, especially for EHEDG-certified and 3-A-compliant
instruments.
For compliance with the EHEDG certification, one of the EHEDG-recommended
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process connections must be used. These are marked with the logo in the data sheet.
For compliance with 3-A conformity, a 3-A-compliant process connection must be
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used. These are marked with the logo in the data sheet.
Mount the instrument with minimal dead space and able to be cleaned easily.
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The mounting position of the instrument should be designed to be self-draining. See
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chapter 5.2.1 "Installation regulations for self-draining".
The mounting position must not form a draining point or cause a basin to be formed.
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WIKA operating instructions, model DMSU22SA
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