This test corner conforms to the standard requirement of Clause 11.2, Figure 103 of IEC 60335-2-30:2009+AMD1:2016 +AMD2: 2021.

This test box is made of dull black-painted plywood approximately 20 mm thick. The wall A can be positioned at different distances from the far end of the test box.

The test box is placed in the test corner, with side B against one wall of the test corner and the sloping end of the test box against the other wall. The test corner shall be at least 470 mm wide, 760 mm deep and 470 mm high.

The cab heater is placed in the test box in the most unfavourable position according to the manufacturer's instructions, if it will fit into the test box, and with the distance L = 0 mm. The shortest distance to the wall of the test box shall not be less than that stated in the manufacturer's instructions for the shortest permissible distance between the heater outlet and the interior surfaces of the motor vehicle. The wall A of the test box may be moved to increase L to a maximum distance L= 220 mm.

If the manufacturer has not supplied any instructions for the placing of the cab heater or if the heater cannot fit in the test box, the cab heater is placed in the most unfavourable position on the floor of the test corner. Heaters containing PTC heating elements are placed away from the walls if this will lead to higher temperatures.

The temperature rise of the felt pad is determined by means of thermocouples attached to small blackened disks of copper or brass, 15 mm in diameter and 1 mm thick. The disks are placed on the surface of the pad.

The probe may be held in place using a laboratory stand clamp or similar device. Any measuring instrument giving the same results as the probe may be used.

• Compliance with IEC Standards: Manufactured in accordance with the requirements of IEC 60335-2-30 Clause 11.2 and Figure 103.
• Simulated Room Corner: Replicates a real indoor corner composed of a floor and two vertical walls, to deliver reliable test results for heaters.
• Matte Black Finish: Interior and exterior surfaces are finished with matte black paint for uniform heat absorption.
• Versatile Thermocouple Mounting: Pre-drilled holes are spaced at 10 cm intervals, facilitating easy installation of temperature sensors.
• Robust Structure: Fabricated from plywood with a thickness of around 20 mm, featuring solid construction and extended service life.