In the description of the test procedure for motor vehicle headlamps emitting an asymmetrical passing-beam or a driving-beam the test dirt is specified which simulates the real dirt. The test dirt is used for headlamps with an outer lens made of polymer material.
Composition
The composition of the test dirt is as follows: 9 parts quartz sand between 0 µm and 100 µm 5 parts sodium chloride 1 part beech wood coal 0.2 parts carboxymethylcellulose
Transport and Storage
Partial segregation may occur during transport and storage. It is therefore recommended to homogenize the DMT Test Dirt ECE R112 2.1.1.1 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 Dirt ECE R112 2.1.1.1
Standard:
ECE R 112
Title of Standard:
Uniform provisions concerning the approval of motor vehicle headlamps emitting an asymmetrical passing-beam or a driving-beam or both and equipped with filament lamps and/or light-emitting diode (LED) modules
