WIKA 851.02.100 - Manual (Page 4)

WIKA Operating instructions DELTA-plus, DELTA-comb and DELTA-switch 4
!
Caution
1
740.01
Illustration for example
st
308
15 07/
009 GB/D/F
GB
1. Safety instructions ... 3. Operating principle
1. Safety instructions
The appropriate national safety regulations (i.e. VDE 0100 /
EN 60 079-14 / EN 837-) must be observed when installing,
commissioning and operating these instruments.
Do not work on gauge while under voltage (applies to Model 70.0/03.100
and 851.0.100)
Serious injuries and/or damage can occur should the appropriate regulations
not be observed
Only appropriately qualified personnel should work on these instruments
2. General
These operating instructions are based on the following information:
EN 837-: Selection and installation recommendations for pressure gauges
Data sheet PM 07.15: Differential pressure gauge with integrated working
pressure gauge su Model 70.01.100
Data sheet PV 7.16: Differential pressure gauge with integrated working
pressure gauge and micro switch
T
Model 70.0.100
Data sheet PV 7.17: Differential pressure switch sv
Model 851.0.100
3. Operating principle
The j and i measuring medium chambers
are separated by an elastic diaphragm.
The differential pressure causes an
axial movement (measured travel) in the
diaphragm against the measuring range
spring. The measured travel is proportional
to the differential pressure and is trans-
mitted, „pressure sealed“ and with minimal
friction, via a connecting rod; for:
su
to the movement
st to the movement
and in addition to the plungers
on the
microswitches
sv to the plungers
on the microswitches
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