DLG Test Report
Transcription
DLG Test Report
MEKRA Lang GmbH & Co. KG Agricultural Mirror 1009 with Auxiliary Mirror Field of Vision DLG Test Report 6039 F Brief Description The tested product, MEKRA Agricultural Mirror 1009, is a rear-view mirror specifically designed for use with agricultural vehicles. This class II mirror is ECE-certified (No. E1-021165) and features an auxiliary close-proximity mirror. DLG e.V. Testzentrum Technik und Betriebsmittel Manufacturer and Applicant MEKRA Lang GmbH & Co. KG Buchheimer Straße 4 – D-91465 Ergersheim Germany Phone: +49 (0)9847 989-0 Fax: +49 (0)9847 989-112 www.mekra.de DLG Test Report 6039F Page 1 of 4 Test Results Class II minimum requirement Class V minimum requirement MEKRA MEKRA auxiliary mirror Original Figure 2: Representation of the various fields of vision The test was conducted in two parts. The field of vision of the main mirror was determined and then compared to the legal requirements. The resulting measurements are shown in Figure 2. The dark blue line indicates the legal requirement for class II main mirrors and hence represents the minimum required field of vision as 100%. The vehicle‘s original mirror (yellow line in Figure 2) already provided a larger field of vision than required. The area captured by the mirror exceeds the legal requirement by approximately 50%. The tested MEKRA Lang mirror (dark green line in Figure 2) provides double the visibility already at the start of the visible area and continues to do so across the entire field of vision. Hence the visible area exceeds the legal requirement by 100%. The tested MEKRA Lang mirror also features a special add-on. In addition to the legally required class II mirror, it is equipped with a small auxiliary mirror for close-proximity applications. Figure 3: Side view from cab DLG Test Report 6039F Page 2 of 4 Its specific task is to capture the area next to the two rear wheels which are not directly visible. As opposed to trucks, farm and forestry tractors are not legally required to carry this type of mirror (class V). Therefore the light blue line in Figure 2 representing the legal requirement for class V mirrors is for illustrative purposes only. The light green field of vision for the small auxiliary mirror shown in Figure 2 does not completely cover the front area, but this is not significant for field tractors, since this area is directly visible through the lower part of the doors. The auxiliary mirror does, however, completely close the visibility gap up to where the legally required field of vision begins, which is particularly important for this type of vehicle, since it is specifically the area to the side of the front wheels which cannot be directly seen from within the cab. As depicted in Figures 3 and 4, persons and objects next to the rear wheels can be detected using the auxiliary mirror. Summary: The MEKRA Lang rear-view mirror offers almost double the legally required field of vision. The auxiliary mirror is an excellent enhancement, since it captures the area directly to the side of the vehicle. This is particularly helpful and a safety advantage when maneuvering in tight areas and in all areas where children and other persons may be present. This was confirmed by a brief practical experiment. The larger field of vision provides significant safety gains. Based on the above-mentioned results the use of this mirror is highly recommended. Derived fields of vision: Standard mirror field of vision Main mirror field of vision MEKRA modular mirror Close-proximity field of vision MEKRA modular mirror Figure 4: Enhanced field of vision provided by the MEKRA Lang mirror DLG Test Report 6039F Page 3 of 4 Test Results The DLG “field of vision” focus test determines the effect of the rear-view mirror. Mirrors are tested in accordance with the requirements of ECE Regulation R46 and European Directive 2003/97/EC, respectively. The above-mentioned regulatory requirements address various mirror classses. The main mirror field of vision is assessed according to procedures for mirror class II. The small auxiliary mirror is tested according to procedures for mirror class V which is dedicated to close-proximity mirrors. For testing purposes, the mirror is attached to a test vehicle and the field of vision is determined based on the corresponding configuration. The tractor’s driver’s seat represents point zero for measurements along the x-axis. The y-axis starts at the vehicle’s outer edge. The visible area starts 4 m behind the driver’s seat at a width of 1 m and then opens up into a cone shape towards the back. Test Station DLG e.V., Testzentrum Technik und Betriebsmittel Max-Eyth-Weg 1 64823 Groß-Umstadt Germany Reporter Dipl.-Ing. (FH) O. Thamm Test Execution Peter Saal ENTNAM – European Network for Testing of Agricultural Machines is the network of European testing stations. Its aim is to provide farmers, dealers of agricultural machines and manufacturers across Europe with test results. For additional information, please visit www.entam.com, or send an email to [email protected] 11-642 October 2011 ©DLG DLG e.V.,Testzentrum Technik und Betriebsmittel Max-Eyth-Weg 1, D-64823 Groß-Umstadt, Germany, Phone: +49 (0)69 24788-600, Fax: +49 (0)69 24788-690, email: [email protected], website: www.dlg-test.de For a free download of all DLG test reports, go to www.dlg-test.de! DLG Test Report 6039F Page 4 of 4