This device is used in accordance with Approved Method Measuring Lumen Maintenance of Led Lightsources, section 40 Environmental conditions are required to be used exclusively to provide a dual-temperature test environment for LED testing; The equipment provides the test environment temperature and the body temperature respectively by the test chamber and the mounting plate located on the door, 4 doors are installed before and after the test chamber, a temperature control board is installed on each door, and the temperature control board has a threaded hole for installing the sample and a thermocouple hole for the test temperature; A number of test chambers are placed on the test rack and communicate with a computer located on the outdoor console via a communication cable to form a test system.
Functional parameters
1.Number of stations: 4, a total of 4 doors before and after the test box, one test station on each door.
2.There are three groups of test samples at each station, and each group of test samples is connected with 10 samples in series.
3.Temperature control mode: semiconductor heating and cooling (ordinary type), electric heating element heating, environmental heat dissipation and cooling (high temperature type).
4.The temperature control plate and the temperature in the chamber are controlled separately, and the temperature of the temperature control board is 2-3 times higher than the ambient temperature in the test chamber during the test.
5.Technical parameters of temperature control board:
Temperature range: -2 -90 (normal type), 50 -150 (high temperature type).
Heat transfer method: copper plate heat conduction.
Temperature accuracy: 1.
Temperature fluctuation: 1.
Indication accuracy: 01℃。
Temperature control board size: L250mmxW200mm.
Temperature control plate material: brass or stainless steel.
Door structure: inner temperature control panel, middle temperature control element, outer air isolation, fan heat dissipation.
6.Technical parameters of the cabinet:
Temperature range: -5 -90 (ordinary type), 50 -150 (high temperature type).
During the test, the temperature of the temperature control plate is 2 -3 times higher than the ambient temperature in the test chamber.
Heat transfer mode: air circulation heat transfer.
Temperature accuracy: 2.
Temperature fluctuation: 2.
Indication accuracy: 01℃。
The test chamber is empty: L600mmxd200mmxh250mm.
Structure: The fan is installed at the top of the test chamber, sucks air from the test chamber, and returns air on both sides.