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BKI 09 ATEX 0003X

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5.4.4 AUTOMATIC ADJUSTMENT

To maintain a sufficiently strong reflection signal, the gain is adjusted automatically.

When the amplitude of the level reflection decreases, the gain will increase to compensate for the loss in signal amplitude. Gain and level threshold thus

maintain the same proportion.

At gain 3, the level signal

1 is located between a distance of 2000 and 4000 mm or 6.5 and 13 feet.

2 is the level threshold. This is shown below:

The amplification factor is 3

The level has dropped, increasing the distance between level and flange.

1 is located over 4000 mm or 13 feet.

2 threshold

3 interference signals

The interference signals are now below the level threshold (2), whose lower

limit is 50 mV.

As in the diagram above, the amplification factor is 3.

In both cases, the automatically adjusted gain of the threshold indicates all

signals located above one-half of the amplitude of the level signal.

In the event of operational or installation faults, you can frequently identify the cause of the fault by means of this function and normally eliminate it yourself.

Should the fault persist, please send a copy of the screen (screen shots with F10) to your NIVELCO Service Centre.

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