Thermal Shock Tester's entire design process
Thermal Shock Tester selection of high-quality materials, the use of the current state-of-the-art processing equipment processing, shell surface spray treatment, beautiful, smooth. Color coordination, angular design, smooth lines and natural. (SUS304), the insulation material is polyurethane foam and glass fiber, the design is reasonable and durable. The stainless steel plate (SUS304) is made of stainless steel plate (SUS304) Equipment in line with the premise of national standards, all aspects of performance are stable on the basis of more practical and easy to control. Moreover, the device has easy to install, simple operation, security device settings so that users in accordance with the normal operating procedures under the premise of no worries. Thermal Shock Tester can achieve high temperature, low temperature in the moment of the cycle of change, today's box design can be classified as: two-box Thermal Shock Tester and three-box Thermal Shock Tester.
The two-section Thermal Shock Tester is divided into two zones: the high temperature zone and the low temperature zone. The upper part is the high temperature zone. The lower part is the low temperature zone, which is used to switch the temperature impact automatically. Using the blue sample rack, the test sample is placed in the hanging blue in the more suitable for small samples were tested, because the design reasons, hatchable Thermal Shock Tester can not detect fragile samples.
Three-side Thermal Shock Tester from the structure point of view can be divided into three areas, the above is the high temperature zone, the middle is the sample area, the following is the low temperature area, the test sample placed in the sample area, through the control device to adjust the conversion can be automatically adjusted Experimental temperature impact test.
The two-box design principle is derived from the time point (<= 5min) in the instantaneous change requirement of the high temperature and low temperature environment. By placing the test sample in the basket, the two zones are running separately to realize the instant of the ambient temperature Variety.
The three-box design principle is to place the product in the medium temperature zone, and then the high temperature or low temperature area of the environment instilled into the test area, thus changing the temperature range of the temperature environment, this design can be two-box Thermal Shock Tester can not At room temperature under the temperature impact test standards, the current production of Thermal Shock Tester mostly to the main three.
Thermal Shock Tester design comes with the following perfect features:
1, the perfect protection of the alarm function: When a short circuit, leakage, studio overheating; compressor overpressure, overload, oil pressure, water and other abnormal conditions, the screen immediately automatically shows the cause of the malfunction and provide exclusion methods and Found that the input voltage instability, with an emergency shutdown device, hot and cold impact structure movement time in 10 seconds;
2, hot and cold shock temperature recovery time in 5 minutes, can meet the MTL, IEC, JIS, GJB and other norms;
3, expandable equipment: temperature recorder, Ln2 rapid cooling control system, RS-232 communication interface device, with the personal computer at the same time on-line monitoring and recording of local area network.
For the Thermal Shock Tester control system, the controlled object is a first-order inertia plus pure lag. In order to facilitate the actual adjustment, still use the commonly used PID algorithm to achieve temperature control, but in the whole control process, the PID parameter tuning was carefully analyzed, and the design of a PID parameter generator, the system temperature control effect is very Big improvement.
Thermal Shock Tester The temperature control during the test is based on the set curve, as shown in Figure 4-1. The diagram is an example of a test curve, containing a total of four temperature control section: the rising section T1, the constant temperature section T2, the cooling section T3 and the constant temperature section T4. Obviously, in order to make the actual temperature control curve to track the set curve, and to ensure that the T2 and T4 system system is poor, to meet the system requirements of temperature control accuracy, PID parameter tuning is critical.