E
xcessive system vibration or shocks
,
e
.
g
.
caused by agitators or
turbulence in the vessel
(
e
.
g
.
from
fl
uidisation
)
can cause the coax
probe of
VEGAFLEX
66
to vibrate in resonance
.
S
hould a coax probe
of more than
1
m
(
3
.
281
in
)
length should be used
,
you can provide a
suitable support or guy directly above the end of the probe to stabilise
it
.
S
tandpipes or bypass tubes are normally metal tubes with a diameter
of
30
…
200
mm
(
1
.
18
…
7
.
87
in
).
I
n measurement technology such a
tube corresponds to a coax probe
.
I
t does not matter if the standpipe is
perforated or slotted for better mixing
.
L
ateral inlets with bypass tubes
also do not in
fl
uence the measurement
.
M
easuring probes can be mounted in bypass tubes up to
DN
200
.
T
he max
.
temperature is
250
°
C
(
482
°
F
).
I
f
VEGAFLEX
66
is used in standpipes or bypass tubes
,
contact with
the tube wall should be avoided
.
W
e o
ff
er spacers as accessories for
fastening the probe in the middle of the tube
.
D
epending on the tube diameter or tube length
,
one or several spacers
can be mounted
.
W
ith cable probes
,
the cable can also be strained to
avoid contact with the tube
.
T
he max
.
temperature for the spacers is
250
°
C
(
482
°
F
).
A
special high temperature version of
VEGAFLEX
66
with integrated
bypass tube can be used in applications with temperatures up to
400
°
C
(
752
°
F
).
K
eep in mind that buildup can form on the spacers
.
S
trong buildup can
in
fl
uence the measurement
.
S
tandpipes or bypass
tubes
14
VEGAFLEX
66
•
4
…
20
m
A
/
HART
four
-
wire
4
M
ounting
34170
-
EN
-
100427
