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17
Reference Manual
00809-0700-4530, Rev AA
Section 2: Installation Considerations
September 2013
Installation considerations
Table 2-4. Transition zones for the Rosemount 3300 Series installed in metallic pipes
Table 2-5. Transition zones in chambers for the Rosemount 5300 Series installed in
metallic pipes
Figure 2-8. Measuring zones in chambers
Probe Size
Upper Transition Zone Lower Transition Zone
High Dielectric Low Dielectric High Dielectric Low Dielectric
Single Rigid 4 in. (10 cm) 4 in. (10 cm) 2 in. (5 cm) 4 in. (10 cm)
Single Flexible 5.9 in. (15 cm) 8 in. (20 cm) 7.5 in. (19 cm) 10.2 in. (26 cm)
Coaxial 4 in. (10 cm) 4 in. (10 cm) 1.2 in. (3 cm) 2 in. (5 cm)
Dielectric
Constant
Rigid Single
Lead
(1),(2)
(1) Single probes are the preferred choice.
(2) Rigid Single Lead probe without SST centering disk or with a PTFE centering disk.
Rigid Single
Lead,
with metallic
centering disk
Flexible Single
Lead
(1)
Coaxial
(3)
(3) Coaxial should only be used for very clean or low DC applications.
Upper
(4)
Transition
Zone
(4) The distance from the upper reference point where measurements have reduced accuracy, see A in Figure 2-8.
80 (water) 4.3 in. (11 cm) 4.3 in. (11 cm) 4.3 in. (11 cm) 4.3 in. (11 cm)
2 (oil) 6.3 in. (16 cm) 6.3 in. (16 cm) 7.1 in. (18 cm) 4.3 in. (11 cm)
Lower
(5)
Transition
Zone
(5) The distance from the lower reference point where measurements have reduced accuracy, see C in Figure 2-8.
80 (water) 2 in. (5 cm) 2 in. (5 cm) 5.5 in. (14 cm) 4 in. (10 cm)
2 (oil) 2.8 in. (7 cm) 8 in. (20 cm) 7.5 in. (19 cm) 5.5 in. (14 cm)
A > Upper transition zone
B = Effectice measuring
range, determined by
mating tank connections
C > Lower transition zone
including weight height
(for flexible probes) and
clearance distance
Single
rigid
Probe/
chamber
diameter
must be
3 in. or 4 in.
(7.5 cm or
10 cm)
Use centering
disks for probes >
3 ft (1 m)
Single flexible
for chambers >
3 ft (1 m)
Probe/chamber
diameter must be
3 in. or 4 in.
(7.5 cm or 10 cm)
Always use a
centering disk