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A.1.2
Measuring range
Table A-1: Maximum Measuring Range, ft. (m)
Model
Performance class
Standard
Ultra accuracy
Rosemount 5408
130 (40)
50 (15)
Rosemount 5408:SIS
130 (40) in Control/Monitoring mode
82 (25) in Safety (SIS) mode
50 (15)
(1)
The Rosemount 5408:SIS has two operational modes: Safety (SIS) and Control/Monitoring.
Safety (SIS) mode must be set when used in Safety Instrumented Systems. Control/Monitoring
mode is intended for use in a Basic Process Control System (BPCS).
Note that a combination of adverse process conditions, such as heavy turbulence, foam,
and condensation, together with products with poor reflection may affect the measuring
range.
Measuring range for solids
should be considered as guidelines; the total measuring
range may differ depending on other contributing application conditions such as product
filling, how the product piles up, silo diameter vs. angle of repose, internal obstacles within
the silo, dust, condensation, antenna build up, etc.
Table A-2: Recommended Measuring Range for Solids, ft. (m)
Antenna
Light
powder
Light
granulates
and pellets
Heavy
powder
Grains
Larger
particles
1
½
-in. (DN40) cone
16 (5)
33 (10)
66 (20)
66 (20)
82 (25)
2-in. (DN50) cone/process seal
16 (5)
33 (10)
82 (25)
82 (25)
98 (30)
3-in. (DN80) cone/process seal
49 (15)
66 (20)
98 (30)
98 (30)
130 (40)
66 (20)
98 (30)
130 (40)
130 (40)
130 (40)
115 (35)
130 (40)
130 (40)
130 (40)
130 (40)
(1)
Plastic powder, etc. (Dielectric constant: 1.2)
(2)
Plastic pellets, etc. (Dielectric constant: 1.35)
(3)
Lime powder, cement, sand, etc. (Dielectric constant: 1.5)
(4)
Kernels, brans, etc. (Dielectric constant: 1.5)
(5)
Wood chips/pellets, etc. (Dielectric constant: 1.7)
(6)
Cone and process seal antennas are the preferred choice for most solid applications. For specific recommendations in
dusty applications, see section "Dust management" in the Measuring Level and Volume of Solid Materials
(7)
Recommended for longer measuring ranges, typically > 66 ft (20 m).
Specifications and reference data
Reference Manual
February 2020
00809-0100-4408
164
Reference Manual
Содержание Rosemount 5408
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Страница 8: ...Contents Reference Manual February 2020 00809 0100 4408 viii Reference Manual ...
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