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7 Maintenance and fault rectiﬁcation

7.1 Maintenance

When used as directed in normal operation, OPTISWITCH

3100 C is completely maintenance-free.

7.2 Fault rectiﬁcation

? OPTISWITCH 3100 C signals "covered " when the vibrating

element is not submerged (overﬁll protection)

? OPTISWITCH 3100 C signals "uncovered" when the

vibrating element is submerged (dry run protection )

l Supply voltage too low

à Check the power supply

l Electronics defective

à Push the mode switch (min./max.). If the instrument

then changes the mode, the instrument may be

mechanically damaged. Should the switching function

in the correct mode still be faulty, return the instrument

for repair.

à Push the mode switch. If the inst rument then does not

change the mode, the oscillator may be defective.

Exchange the oscillator.

à Check if there is buildup on the vibrating element, and if

so, remove it.

l Unfavourable installation location

à Mount the instrument at a location in the vessel where

no dead zones or mou nds can form.

à Check if the vibrating element is covered by buildup on

the socket.

l Wrong mode selected

à Set the mode switch on OPTISWITCH 3100 C to

"max". Set the correct mode on the signal conditioning

instrument (A: overﬁll protection; B: dry run protection).

Checking the switching signal

22 OPTISWITCH 310 0 C - with two-wire output

Maintenance and fault rectiﬁcation

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Directed Electronics 3100 Instrucciones de operaciones Pagina 22