Wika 891.34.2189 Manual de usuario descargar pdf (Pagina 4)

1. Safety instructions / 2. Operating principle

2155079.01

2279453 08/2009 GB/D/F

WIKA Operating Instructions Differential Pressure Transmitter DELTA-trans4

1. Safety instructions

The appropriate national safety regulations (i.e. VDE 0100 /

EN 60 079-14 / EN 837-2) must be observed when installing,

commissioning and operating these instruments.

Do not work on the gauge while it is powered

Serious injuries and/or damage can occur should the appropriate regulations

not be observed

Only appropriately qualified personnel should work on these instruments

2. Operating principle

The differential pressure transmitter consists mainly of a mechanical measu-

ring system (1) with an elastic pressure element (2), a Hall-effect sensor (3) with

signal processing board (4) and a case with the connections for the electronics.



A magnet (5), rigidly coupled to the

pressure element, influences the

electromagnetic field of the HALL-

effect sensor. The resulting signal is

amplified to a standard output signal

via the signal processing board.

For recalibration, zero and span

can be adjusted by means of easily

accessible potentiometers (6).

Pressure entries are identified by the

symbols; j high pressure and i low

pressure

1 2 3 4 5 6 7 8 9 ... 43 44

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Wika 891.34.2189 Manual de usuario Pagina 4