KROHNE SU 501 Ex, Operating Instructions Manual

Page: 23 / 36

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M alfunction during function test
l
A fter pushing the test key , the switching conditions do
not occur in the correct sequence or correct duration , e .
g . no full signal is outputted .
à
M easure the line resistance
à
I f the cable is highly resistive , bring it to a normal
resistance , e . g . check terminals and cable connections
on corrosion
7 . 3 I nstrument repair
I f a repair is necessary , please proceed as follows :
Y ou can download a return form from our I nternet homepage
http :// www . krohne - mar . com / fi leadmin / media - lounge / PDF -
D ownload / S pecimen _ e . pdf .
B y doing this you help us carry out the repair quickly and
without having to call back for needed information .
l
P rint and fi ll out one form per instrument
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C lean the instrument and pack it damage - proof
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A ttach the completed form and possibly also a safety data
sheet to the instrument .
SU 501 E x - S ignal conditioning instrument 23
M aintenance and fault recti fi cation
27953
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EN
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050616