Emerson Rosemount 3308A Reference Manual page 125

Reference Manual
00809-0100-4308, Rev CA
Table A-1. Measuring Range and Minimum Dielectric Constant
Probe type
Flexible single lead
Rigid single lead probe (0.3-in./8 mm)
Rigid single lead probe (0.5-in./13 mm)
Segmented rigid single lead
Flexible twin lead
Coaxial
1. Minimum Dielectric Constant may be lower than 2.0 if one or more of the following conditions apply:
- Probe is installed in stilling well or chamber.
- Maximum measuring range is not utilized.
- Noise Threshold is manually adjusted to a lower level.
2. For temperatures above 140 °F (60 °C) manual adjustment of noise threshold may be required for products with low dielectric constant at or close to maximum measuring
range.
Table A-2. Maximum Recommended Viscosity and Contamination/Build-up
Probe type
Single lead
Twin lead
Coaxial
1. Consult your local Emerson representative in the case of agitation/turbulence and high viscous products.
2. For viscous or sticky applications, it is not recommended to use centering discs mounted along the probe.
Specifications and Reference Data
PRELIMINARY
Maximum measuring range
55.8 ft. (17 m)
9.8 ft. (3 m)
19.7 ft. (6 m)
32.8 ft. (10 m)
55.8 ft. (17 m)
19.7 ft. (6 m)
Maximum viscosity
(1)(2)
8000 cP
1500 cP
500 cP
Specifications and Reference Data
Minimum dielectric constant
2.0, when distance < 32.8 ft. (10 m)
10, when distance > 32.8 ft. (10 m)
2.0
2.0
2.0
2.0, when distance < 32.8 ft. (10 m)
10, when distance > 32.8 ft. (10 m)
2.0
Contamination/build-up
Build-up allowed
Thin build-up allowed, but no bridging
Not recommended
August 2017
(1)(2)
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