Product Data Sheet
00813-0100-4811, Rev DA
Catalog 2008 - 2009
Rosemount 3300 Series
Level-10
Measuring Range
In the table below, measuring range information is given for each probe. Since measuring range depends on the
application and on the different factors described in this chapter, the values are given as a guideline for clean
liquids. For more information, consult factory.
Different parameters affect the echo and therefore
the maximum measuring range differs depending on
application according to:
• Disturbing objects close to the probe.
• Media with higher dielectric constant (ε
r
) gives
better reflection and allows a longer
measuring range.
• Surface foam and particles in tank atmosphere
are circumstances that might affect measuring
performance.
• Heavy coating / contamination on the probe
should be avoided since it can reduce
measuring range and might cause erroneous
level readings.
• Tank material (e.g. concrete or plastic) for
measurements with single lead probes
(see “Mechanical Considerations” on
page 13).
Coating
• Single lead probes are preferred when there is
a risk for contamination (because coating can
result in product bridging across the two leads
for twin versions; between the inner lead and
outer pipe for the coaxial probe).
• For viscous or sticky applications, the PTFE
probes are recommended. Periodic cleaning
might be required.
• Maximum error due to coating is 1-10%
depending on probe type, dielectric constant,
coating thickness and coating height above
product surface.
Coaxial Rigid Twin Lead Flexible Twin Lead Rigid Single Lead Flexible Single Lead
Maximum Measuring Range
19 ft 8 in. (6 m) 9 ft 10 in. (3 m) 77 ft 1 in. (23.5 m) 9 ft 10 in. (3 m) 77 ft 1 in. (23.5 m)
Minimum Dielectric Constant
1.4 (Std)
1.6 (HP)
2.0 (HTHP)
1.9 1.6 up to 33 ft (10 m)
2.0 up to 66 ft (20 m)
2.4 up to 77 ft 1 in. (23.5 m)
2.5
(1.7 if installed in a
metallic bypass or
stilling well)
2.5 up to 36 ft (11 m)
5.0 up to 66 ft (20 m)
7.5 up to 77 ft 1 in. (23.5 m)
Coaxial Twin Lead Single Lead
Maximum Viscosity
500 cP 1500 cP 8000 cP
(1)
(1) Consult factory if agitation / turbulence and high viscosity.
Coating / Build-up
Coating not
recommended
Thin coating
allowed, but no
bridging
Coating allowed
(3 Seiten)
(182 Seiten)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Kommentare zu diesen Handbüchern