T
he ventilation of the electronics housing as well as the atmosperic
pressure compensation for the measuring cell are realised via a
fi
lter
element in the area of the cable gland
.
2
1
2
1
2
1
1
2
F
ig
.
4
:
P
osition of the
fi
lter element
1
F
ilter element
2
B
lind stopper
C
aution
:
D
ue to the
fi
lter e
ff
ect
,
the pressure compensation is time delayed
.
W
hen opening
/
closing the housing cover quickly
,
the measured value
can change for a period of approx
.
5
s by up to
15
mbar
.
I
nformation
:
M
ake sure that the
fi
lter element is always free of buildup during
operation
.
A
high
-
pressure cleaner may not be used for cleaning
.
W
ith instrument versions in protection
IP
66
/
IP
68
,
1
bar
,
the ventilation
is realised via the capillaries in the permanently connected cable
.
T
he
fi
lter element is replaced by a blind stopper
.
H
igher process temperatures often mean also higher ambient
temperatures
.
M
ake sure that the upper temperature limits stated in
chapter
"
T
echnical data
"
for the environment of the electronics housing
and connection cable are not exceeded
.
V
entilation and pressure
compensation
T
emperature limits
14
VEGABAR
51
•
F
oundation
F
ieldbus
4
M
ounting
36715
-
EN
-
110629