How to reduce the experimental error of Thermal Shock Tester
According to the test requirements and test standards, Thermal Shock Tester is divided into three boxes and two boxes, the difference is that the test mode and internal structure is different. Two boxes are divided into high-temperature room and low-temperature room, no energy storage room, is driven by the motor basket to achieve high and low temperature switch, the product on the basket with the basket up and down together to complete from high temperature to low temperature or from low temperature The impact of high temperature.
Thermal Shock Tester can be widely used in electronic components testing, semiconductor, electronic circuit boards, metal chemistry, materials and other industries product testing. The lower part of the test chamber is a low-temperature storage area, the upper part is a high-temperature heat storage area. The specimen (test product) is placed in the middle of the test chamber, and the upper damper is opened at high temperature impact to form a high temperature internal circulation. , The formation of low temperature internal circulation.
Thermal Shock Tester operation includes three major steps, namely:
1, a reasonable choice of test equipment: This should be based on the different conditions of the test material reasonable choice of Thermal Shock Tester temperature range and effective volume size. Temperature range in the choice of time should be considered the test product commonly used test temperature, the limit temperature should be based on the usual temperature to set aside the appropriate margin, if often use the limit temperature for a long time test, the device is eaten drops. When considering the size of the equipment, the effective volume of the test sample and the test chamber should be maintained at a reasonable ratio. For the test of the heat test sample, the volume shall not be greater than one tenth of the effective volume of the test chamber. The volume of the sample shall not be greater than one third of the effective volume of the test chamber.
2, the correct placement of the test sample: the test sample placement, should be thermal shock test chassis wall 10cm above, for a number of samples should be placed on the same plane. The sample should not be placed in the outlet and outlet, to the temperature sensor should also be set aside a certain distance, so you can ensure the accuracy of the test temperature.
3, the correct operation of equipment: the use of Thermal Shock Tester, to be familiar with the required test sample performance, test conditions, test procedures and test technology, to the Thermal Shock Tester to understand the structure, to be familiar with the controller The operation and performance, carefully read the instructions, standardize the operation, to avoid the operation error caused by the test equipment can not run properly to cause damage to the test sample, the test data is not accurate.
Thermal Shock Tester with wet ball gauze (wet ball paper) is a certain requirement, not any gauze can be used, because the relative humidity is the distance between the temperature and humidity difference, strictly speaking, with the local atmospheric pressure, wind speed related. The wet bulb temperature indication is related to the amount of water inhaled by the gauze and the surface evaporation. These are directly related to the quality of gauze, so the weather requirements, wet gauze gauze must be woven into the special "wet ball gauze." Otherwise it is difficult to ensure that the wet bulb thermometer shows the correctness, that is, the humidity is correct. In addition, Thermal Shock Tester the placement of the wet ball gauze is also clearly defined, gauze length: 100mm, tightly wound sensor probe, the probe from the humidity cup 25-30mm, gauze dipped into the cup, so as to ensure the correctness of the equipment control and humidity.