LB 379
7
Figure 2: Absorption coefficients
With
244
cm, the atomic number has a significant influence on the absorption coefficient.
This isotope is incorporated in the measuring paths LB 3602/3603. These measuring paths
are used to measure materials with high atomic number at very low concentrations. These
measuring paths are not type approved.
This dependence of the absorption coefficient on the atomic number has a positive effect
if, for example, in a solution of sodium chloride in water, where the salt content is to be
determined, contaminations by hydrocarbons may occur, for example by sugar or cellulose,
in varying proportions. The lower absorption coefficient of the impurity results in a lower
influence on the measurement result.
An adverse effect is obtained if, for example, the density of a hydrocarbon mixture is to be
determined, which contain impurities by a substance having a high atomic number, such
as chlorine. In this case we get significant changes in the absorption of the radiation even
with low fluctuations in the chlorine content, so that a density change is simulated, which
in reality does not exist.
0,01
0,1
1
10
100
0
5
10
15
20
25
30
35
A
b
sor
p
tion coefficient
µ
Atomic number Z
Cs - 137 (662 keV)
Am - 241 (60 keV)
Cm 244 (18 keV)
Co -60 (1,3 MeV)
Содержание LB 3602
Страница 1: ...Measuring Path LB 379 and LB 3602 3603 Operating Manual 40437BA2 Rev No 00 12 2016...
Страница 2: ...LB 379 2...
Страница 4: ...LB 379 4...
Страница 31: ...LB 379 31 9 Dimensional Drawings 9 1Measuring Path LB 379 with DIN Flange...
Страница 32: ...LB 379 32 9 2Measuring Path LB 379 with ASA Flange...
Страница 33: ...LB 379 33 9 3Measuring Path LB 379 with Threaded Connector...
Страница 34: ...LB 379 34 9 4Measuring Path LB 3602 03...
Страница 35: ...LB 379 35 10 ATEX Certificate...
Страница 36: ...LB 379 36...
Страница 37: ...LB 379 37...
Страница 38: ...LB 379 38...
Страница 39: ...LB 379 39...
Страница 40: ...LB 379 40...
Страница 41: ...LB 379 41...
Страница 43: ...LB 379 BERTHOLD TECHNOLOGIES GmbH Co KG Calmbacher Str 22 D 75323 Bad Wildbad Germany www Berthold com...