Rosemount 5300 Series, Справочное руководство

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227
Specifications and Reference Data
Specifications and Reference Data
May 2016
Reference Manual
00809-0100-4530, Rev DD
A.2.3 Measuring range
See Table A-6 on page 227 for each probe’s 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.
Note
For Remote Housing, see Table A-7 on page 228 for the
maximum recommended measuring range for different
Remote Housing lengths, installation types, Dielectric
Constants, and probe types.
Different parameters (factors) affect the echo and therefore
the maximum measuring range differs depending on
application according to:

Disturbing objects close to the probe.

Media with higher dielectric constant (e
r
) gives better
reflection and allows a longer measuring range.

Surface foam and particles in the tank atmosphere may
affect measuring performance.

Heavy product build-up or contamination on the probe
should be avoided since it can reduce measuring range
and might cause erroneous level readings.
Table A-6. Measuring Range and Minimum Dielectric Constant
Rigid single lead/
segmented rigid
single lead Flexible single lead
(1)
Coaxial Rigid
twin lead Flexible twin lead
Maximum
measuring
range
9 ft. 10 in. (3 m) for
8 mm probes
(code 4A)
19 ft. 8 in. (6 m) for
13 mm probes
(code 4B)
32 ft 9 in. (10 m)for
13 mm probes
(code 4S)
164 ft (50 m)
19 ft 8 in.
(6 m) 9 ft 10 in.
(3 m)
164 ft (50 m)
Minimum
dielectric
constant
1.4 (Std)
(1.25 if installed in
a metallic bypass or
stilling well)
(1)(2)
1.6 (HP/HTHP/C)
(1.4 if installed in a
metallic bypass or
stilling well)
(1)(2)
1. Probe end projection software function will improve the minimum measurable dielectric constant. Consult the factory for details.
2. May be lower depending on installation.
1.4 (Std), up to 49 ft (15 m)
(1)
1.6 (HP/HTHP/C),
up to 49 ft (15 m)
(1)
(Std/HP/HTHP/C)
1.8, up to 82 ft (25 m)
(1)
2.0, up to 115 ft (35 m)
(1)
3, up to 138 ft (42 m)
4, up to 151 ft (46 m)
6, up to 164 ft (50 m)
1.2 (Std)
1.4 (HP/C)
2.0
(HTHP)
1.4 (Std)
(Std)
1.4, up to 82 ft (25 m)
(1)
2.0, up to 115 ft (35 m)
(1)
2.5, up to 131 ft (40 m)
(1)
3.5, up to 148 ft (45 m)
6, up to 164 ft (50 m)