Burkert Type 8112 Manual do Utilizador descarregar pdf (Página 23)

7 Maintenance and fault rectiﬁcation

7.1 Maintenance

If the instrument is used properly, no special maintenance is required

in normal operation.

7.2 Remove interferences

The operator of the system is responsible for taking suitable measures

to rectify faults.

LEVEL SWITCH 8112 oﬀers maximum reliability. Nevertheless, faults

can occur during operation. These may be caused by the following, e.

g.:

l Sensor

l Process

l Voltage supply

l Signal processing

The ﬁrst measure to be taken is to check the output signal. In many

cases, the causes can be determined this way and the faults rectiﬁed.

Error Cause Rectiﬁcation

LEVE

SWITCH 8112

signals "covered"

without being

submerged (over-

ﬁll protection)

LEVEL

SWITCH 8112

signals "uncov-

ered" when being

submerged (dry

run protection)

Operating voltage

too low

Check operating voltage

Electronics de-

fective

Press the characteristic reversal

switch. If the instrument then changes

the mode, the vibrating element may

be covered with buildup or mechan-

ically damaged. Should the switching

function in the correct mode still be

faulty, return the instrument for repair.

Push the characteristic reversal

switch. If the instrument then does not

change the mode, the electronics

module may be defective. Exchange

the electronics module.

Unfavourable in-

stallation location

Mount the instrument at a location in

the vessel where no dead zones or air

bubbles can form.

Buildup on the vi-

brating element

Check the vibrating element and the

sensor if there is buildup and remove

it.

Rea

ction when malfunc-

tions occur

ilure reasons

ult rectiﬁcation

Checkin

g the switching

signal

LEVEL SWITCH 8112 • with NAMUR output 23

7 Maintenance and fault rectiﬁcation

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