Emerson Rosemount 5400 Series - Measuring Range; A.2.2 Measuring Range

190
Reference Manual
00809-0100-4026, Rev HA
Appendix A: Reference data
November 2014
Reference Data
Ambient temperature effect
0.05%/10 K in temperature range -40 °F to 176 °F (-40 °C to 80 °C)
Update interval
1 second
A.2.2 Measuring range
Measuring range and minimum dielectric constant
Maximum measuring range from flange: 115 ft (35 m)
The measuring range depends on:
 Microwave frequency
 Antenna size
 The dielectric constant (H
r
) of the liquid (min. H
r
=1.4)
 Process conditions
See Table A-4 and Table A-5 for measuring range and minimum dielectric constant. Due to the
measuring range depending on the application and factors described below, the values are a
guideline for clean liquids. For more information, ask your local Emerson Process Management
representative.
Table A-4. Rosemount 5402, Maximum Recommended Measuring Range, ft (m)
High frequency
antennas
Dielectric constant
(1)
(1) A. Oil, gasoline or other hydrocarbons, and petrochemicals ( H
r
=1.9-4.0)
In pipes or with ideal surface conditions, for some liquefied gases (
H
r
=1.4-4.0)
B. Alcohols, concentrated acids, organic solvents, oil/water mixtures, and acetone (
H
r
=4.0-10.0)
C. Conductive liquids, e.g. water based solutions, dilute acids, and alkalis (
H
r
>10.0)
A B C A B C A B C
2-in. Cone / Process Seal 33 (10) 49 (15) 66 (20) 82 (25) 115 (35) 115 (35) 9.8 (3) 20 (6) 33 (10)
3-in. Cone / Process Seal 49 (15) 66 (20) 98 (30) 82 (25) 115 (35) 115 (35) 13 (4) 30 (9) 39 (12)
4-in. Cone / Process Seal 66 (20) 82 (25) 115 (35) 82 (25) 115 (35) 115 (35) 23 (7) 39 (12) 49 (15)