Measuring Range - Emerson 5301HxxxxxxxxxxxxxxZZ Series Reference Manual

Reference Manual
00809-0100-4530
Table 2-1: Probe Selection Guide. G=Good, NR=Not Recommended, AD=Application Dependent (consult
factory)
(continued)
Liquid or vapor spray
might touch probe above
surface
Disturbing
Electromagnetic
interference in tank
Cleanability of probe
(1) For overall level applications, a changing dielectric has no effect on the measurement. For interface measurements, a
changing dielectric for the top fluid will degrade the accuracy of the interface measurement.
(2) Limited measuring range.
(3) For viscous or sticky applications, it is not recommended to use centering discs mounted along the probe.
2.6

Measuring range

The measuring range depends on probe type, dielectric constant of the product and
installation environment, and is limited by the Blind Zones at the very top and bottom of
the probe. In the Blind Zones, the accuracy exceeds ±1.18 in. (30 mm), and measurements
may not be possible. Measurements close to the Blind Zones will have reduced accuracy.
Figure 2-7
with reduced accuracy.
Reference Manual
Rigid single Flexible
lead, single lead
segmented
rigid single
lead
NR NR
AD AD
G G
illustrates how the measuring range is related to the Blind Zones and the areas
Coaxial Large
coaxial
G G
G G
NR AD
Transmitter overview
April 2019
Rigid twin Flexible
lead twin lead
NR NR
AD AD
AD AD
21