The coarsest test dust of ISO 12103-1 is the Arizona test dust A4 coarse.
The so-called Arizona test dust A4 coarse consists of 69 % - 77 % quartz. DMT test dust A4 coarse "epsd" complies with the particle size distribution specified in the ISO 12103-1 standard, but 98 % of this consists of quartz. The test dust is identified by an additional code "epsd". "epsd" stands for "equivalent particle size distribution".
Composition
The specified particle size distribution is shown in the following table:
x (µm)
Q3(x) (%)
0.97
0.74 - 0.83
1.38
1.8 - 2.1
2.75
5.5 - 6.3
5.50
11.5 - 12.5
11.0
21.0 - 23.0
22.0
36.0 - 38.5
44.0
58.0 - 60.0
88.0
85.0 - 86.5
124.50
93.0 - 94.0
176.0
97.2 - 98.2
248.90
99.0 - 100.0
352.0
100
Transport and Storage
Partial segregation may occur during transport and storage. It is therefore recommended to homogenize the DMT Test Dust A4 coarse before use, which can be achieved by mixing with a laboratory tumbler mixer. Please store in a dry and airtight original container.
Quality ensurance
In order to achieve reproducible quality, the raw materials and production are strictly controlled. The following quality controls are carried out:
Monitoring the particle size distribution of raw materials Monitoring the particle size distribution of the end product
Specification
Name :
DMT Test Dust A4 coarse
Synonyme :
AC coarse, coarse test dust
Standard:
ISO 12103-1
Title of Standard:
Road vehicles -- Test contaminants for filter evaluation -- Part 1: Arizona test dust
