5HIHUHQFH0DQXDO
00809-0100-4811, Rev AA
October 2002
3-7
Rosemount 3300 Series
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Figure 3-3. Mounting in nozzles
The transmitter can be mounted in nozzles by using an appropriate flange. It
is recommended that the nozzle size is within the dimensions given in
7DEOH . For small nozzles it may be necessary to increase the Upper Null
Zone (UNZ) in order to reduce the measuring range in the upper part of the
tank. By setting the UNZ equal to the nozzle height, the impact on the
measurement due to interfering echoes from the nozzle will be reduced to a
minimum. See also section ³'LVWXUEDQFHVDWWKHWRSRIWKHWDQN³RQSDJH .
Amplitude Threshold adjustments may also be needed in this case.
127(
Except for the Coaxial Probe the probe must not be in contact with the nozzle.
'
P
L
Q
G
L
D
P
H
W
H
U
+
' PLQGLDPHWHUZLWK
8SSHU1XOO=RQHDGMXVWPHQW
+81=
NOZZLE MOUNT V3
Table 3-4. Minimum nozzle diameter and maximum nozzle height (inch/mm)
'
4(100) 4(100) > Probe diameter 6(150) 6(150)
'
2(50) 2(50) > Probe diameter 2(50)
(3)
1.5(38)
(4)
2(50)
+
4(100) + D
(6)
4(100) + D
(6)
- 4(100) + D
(6)
4(100) + D
(6)
