Figure A-10: Interface Level Measurement
$
%
%
A. Product level
B. Interface level
If interface is to be measured, follow these criteria:
•
The dielectric constant of the upper product should be known and should not vary. The
AMS Wireless Configurator and handheld communicator have a built-in Dielectric
Constant Guide to assist users in determining the dielectric constant of the upper
product.
•
The dielectric constant of the upper product must have a lower dielectric constant than
the lower product to have a distinct reflection.
•
The difference between the dielectric constants for the two products must be larger
than 10.
•
Maximum dielectric constant for the upper product is 10 for the coaxial probe, and 5
for the single lead and flexible twin lead probes.
•
Minimum detectable upper product thickness is 4 in. (10 cm) when the upper product
is oil (DC=2.2) and the lower product is water (DC=80).
Sometimes there is an emulsion layer (mix of the products) between the two products
which can affect interface measurements. For guidelines on emulsion situations, consult
your local Emerson representative.
For additional information, see the Guided Wave Radar Interface Measurement
Related information
Specifications and reference data
Reference Manual
February 2020
00809-0100-4308
156
Rosemount 3308 Series
Summary of Contents for Rosemount 3308A
Page 8: ...Contents Reference Manual February 2020 00809 0100 4308 viii Rosemount 3308 Series ...
Page 10: ...Introduction Reference Manual February 2020 00809 0100 4308 10 Rosemount 3308 Series ...
Page 22: ...Transmitter overview Reference Manual February 2020 00809 0100 4308 22 Rosemount 3308 Series ...
Page 74: ...Installation Reference Manual February 2020 00809 0100 4308 74 Rosemount 3308 Series ...
Page 96: ...Configuration Reference Manual February 2020 00809 0100 4308 96 Rosemount 3308 Series ...