Wika DPS40 Manuel d'utilisateur télécharger pdf (Page 11)

WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch 11

14093265.01 03/2014 GB/D/F/E

4. Design and function

DELTA-comb model DPGS40

Pressures p

and p

act on the media chambers ⊕ and ⊖, which are separated by

an elastic diaphragm (1).

The dierential pressure (∆p = p

- p

) leads to an axial deection of the dia-

phragm against the measuring range springs (2).

The deection, which is proportional to the dierential pressure, is transmitted

to the movement (4) in the indicating case and to the leaf springs of the micro

switches (5) via a pressure-tight and low friction rocker arm (3).

Overpressure safety is provided by metal bolsters (6) resting against the elastic

diaphragm.

The adjustment of the switch point is made by the adjustment screws accessible

from the front (7). The assistant scales (8) enable an accurate setting of the switch

points and indicate the current set point.

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Wika DPS40 Manuel d'utilisateur Page 11