Installation
Mounting Instructions
•
The protective cap of the diaphragm
seal should only be removed just
before mounting.
•
The diaphragm seal and the pressure
sensor together form a closed,
oil-filled, calibrated system. The
following rules should be observed:
−
The filling hole is sealed and not to
be opened.
−
When mounting the Cerabar M, it
should only be turned by the nut of
the diaphragm seal and not by the
hex nut of the Cerabar M.
Cleaning
The diaphragm of the diaphragm seal
must not be pressed in or cleaned with
pointed or hard objects.
Mounting
To prevent moisture from entering, the
cable entry should preferably hang
downwards or to the side.
Shifting of the Zero Point due to
Position
The Cerabar M is calibrated based on
the limit point method according to
DIN 16086.
Depending on the orientation of the
instrument, there may be a slight shift in
the measured value. Diaphragm seals
also shift the zero point depending on
the orientation of the instrument.
•
neutral calibration position
•
max. positive zero point shift
•
max. negative zero point shift
This zero point shift due to position can
be corrected (refer to zero point
increase and decrease, page 16).
The max. effect of position for all
diaphragm seals is given in the tables
on page 21 onwards. These values are
for silicone oil. For other oils available,
the shift in zero point due to position
varies according to the density of the oil
(see page 12).
Mounting with Temperature Spacer
Hauser recommends the use
of a temperature spacer when extreme
media temperatures (from approx.
150°C/302°F) continually cause the
ambient temperature to exceed the
permissible limit of +85°C (+185°F).
100
m
m
*
* Additional zero point shift
caused by the hydrostatic
pressure of the water column
in the temperature spacer:
10 mbar (0.15 psi)
In
fo
rm
at
ion
o
n
th
e
ma
ximum
inst
a
llat
ion
h
e
igh
t
is
giv
e
n
o
n
p
age
2
1
onw
ar
ds
(3
.9
4
in
)
Cerabar M with
temperature spacer
vertical
mounting
cable points
downwards
10
Содержание cerabar M PMP 46
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