Figure A-1: Interface Level Measurement
0
25 ft. (7 m)
DC2
DC20
1
2
4
3
5
6
7
8
9
10
11
6.6 (2)
13.1 (4)
19.7 (6)
26.2 (8)
32.8 (10)
39.4 (12)
D
A
C
B
A. Maximum upper product thickness, ft. (m)
B. Upper product dielectric constant
C. Lower product dielectric constant of 10
D. For example, with an upper product dielectric constant of 2, and a lower product
dielectric constant of 20, the maximum upper product thickness is 25 ft. (7 m).
A.1.5
Accuracy over 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.
The following conditions will impact the Blind Zones:
•
If the single lead probes or twin probes are installed in a nozzle, the nozzle height shall
be added to the specified Upper Blind Zone.
•
The measuring range for the PTFE covered flexible single lead probe includes the
weight when measuring on a high dielectric media.
Specifications and reference data
Reference Manual
February 2020
00809-0100-4308
144
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 ...