Vega VEGABAR 67 4 … 20 mA_HART Bedienungsanleitung PDF herunterladen (Seite 13)

4 Mounting

VEGABAR 67 • 4 ... 20 mA/HART

36742-EN-130321

Fig. 4: Position of the lter element

1 Filter element

2 Blind plug

Caution:

Duetotheltereect,thepressurecompensationistimedelayed.

When opening/closing the housing cover quickly, the measured value

can change for a period of approx. 5 s by up to 15 mbar.

Information:

Makesurethatthelterelementisalwaysfreeofbuildupduring

operation. A high-pressure cleaner may not be used for cleaning.

With instrument versions in protection IP 66/IP 68, 1 bar, the ventila-

tion is realised via the capillaries in the permanently connected cable.

Thelterelementisreplacedbyablindplug.

4.2 Mounting preparations

For the suspension cable version note the following points when

selecting the mounting position:

•

Sideways movements of the transmitter can cause measurement

errors

1. Therefore, mount VEGABAR 67 in a calm area or in a suitable

protective tube

•

The suspension cable has a capillary for atmospheric pressure

compensation

2. Therefore lead the cable end into a dry space or directly to the

external electronics

Theexternalelectronicsisprovidedwithterminalsandalterelement

for pressure compensation. Keep in mind for all versions:

•

The protective cover prevents mechanical damage to the measur-

ing cell. It should only be removed when the sensor is deployed in

extremely polluted water.

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Vega VEGABAR 67 4 … 20 mA_HART Bedienungsanleitung Seite 13