Endress+Hauser Indumax CLS54, Operating Instructions Manual

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Maintenance Indumax CLS54
20 Hauser
5.4 Post-connection check
Device condition and specifications Notes
Are the outside of the sensor, assembly, cable undamaged? Visual inspection
Electrical connection Notes
Are the installed cables strain-relieved and not twisted?
Is a sufficient length of the cable cores stripped, and is it positioned
in the terminal correctly? Check the fit (by pulling gently)
Are all the screws terminals properly tightened? Tighten
Are all cable entries mounted, tightened and leak-tight? For lateral cable entries, make sure the cables
loop downwards to allow water to drip off
Are all cable entries installed downwards or mounted laterally?
6 Maintenance
L
CAUTION
Corrosive chemicals
Danger of chemical burns to the eyes and skin. Danger of damage to clothing and equipment
‣
It is absolutely essential to protect the eyes and hands properly when working with acids,
bases and organic solvents!
‣
Wear protective goggles and safety gloves.
‣
Clean away splashes on clothes and other objects to prevent any damage.
‣
Pay particular attention to the information provided in the safety data sheets for the
chemicals used.
As there is no galvanic contact with the medium, inductive sensors are considerably less
sensitive to dirt and fouling than conventional conductive sensors.
However, dirt can clog the measuring channel which, in turn, can alter the cell constant. In
such cases, an inductive sensor also needs to be cleaned.
Clean away fouling on the sensor as follows depending on the type of fouling:
• Oily and greasy films:
Clean with grease remover, e.g. alcohol, acetone, possibly hot water and dishwashing
detergent.
• Lime and metal hydroxide buildup:
Dissolve buildup with diluted hydrochloric acid (3 %) and then rinse thoroughly with plenty
of clear water.
• Sulfidic buildup (from flue gas desulfurization or sewage treatment plants):
Use a mixture of hydrochloric acid (3 %) and thiocarbamide (commercially available) and
then rinse thoroughly with plenty of clear water.
• Buildup containing proteins (e.g. food industry):
Use a mixture of hydrochloric acid (0.5 %) and pepsin (commercially available) and then
rinse thoroughly with plenty of clear water.