Wika DPGT40 Uživatelský manuál Strana 11

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GB
WIKA operating instructions dierential pressure transmitter, model DPGT40 11
14093267.01 03/2014 GB/D/F/E
4. Design and function
4.1 Description
4. Design and function
Pressures p
1
and p
2
act on the media chambers ⊕ and ⊖, which are separated by
an elastic diaphragm (1).
The dierential pressure (Δp = p
1
- p
2
) leads to an axial deection of the
diaphragm 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 via a pressure-tight and low friction rocker
arm (3).
A magnet (5), xed to the rear of the movement, aects the electromagnetic eld
of the HALL sensor. The signal that results from this is converted to a standardised
current output signal by the signal conditioning board (6).
Overpressure safety is provided by metal bolsters (7) resting against the elastic
diaphragm.
14077606.01
4.2 Scope of delivery
Cross-check scope of delivery with delivery note.
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