18
BD_BE 450 e 06/2011
Operating instructions
GB
3. Specifications
3. Specifications / 4. Design and function
Specifications Model P2600
Nominal size 80
Reed contact without with
Accuracy class ± 3 % of full scale value with
increasing differential pressure
± 5 % of full scale value with
increasing differential pressure
Scale ranges 0 … 400 mbar to 0 … 10 bar 0 … 160 mbar to 0 … 2.5 bar
Max. working
pressure
(static pressure)
optionally 100, 250 or 400 bar 100 bar
(scale ranges 0 ... 160 mbar and
0 ... 250 mbar: 50 bar)
Overpressure safety either side to maximum working pressure
(exception for pressure gauges with Reed contact,
scale ranges 0 ... 160 mbar and 0 ... 250 mbar:
Overpressure safety up to 50 bar)
Ingress protection lP 54 (EN 60529 / lEC 529)
Measuring chamber
with pressure
connection (wetted)
Stainless steel 1.4571, 2 x G ¼ female, on the right and left side,
in-line (EN 837-1 /7.3)
For further specifications see tecsis data sheet DD470/DE470 and the order
documentation.
4. Design and function
Description
Pressures p
1
and p2 are given in the and measuring chambers, separated
by the magnetic piston under pressure (or magnetic piston and separating
diaphragm.
The difference in pressure causes an axial movement (deflection) of the piston
supported by the compression spring.
The deflection resulting from this is taken up by a ring magnet found on the
instrument pointer and appropriately displayed. This design combines the
advantages of complete separation of the measuring system and the indication
while eliminating any leakage to the exterior.
For model P2600 the volume flow from the
measuring chamber to the
measuring chamber is minimised by the constructive design and will not interfere with standard processes. For model with option the separation diaphragm
prevents any flow volume from the
to the measuring chamber.
These instruments are mainly intended for gas/air supply and preparation applications where no magnetic particles are involved.