Plastic high temperature resistance test, drying and aging test box, direct sales manufacturer
Essential testing equipment in fields such as aviation, automotive, home appliances, and scientific research, used to test and determine the parameters and performance of electrical, electronic, and other products and materials after high-temperature or constant temperature environmental changes.Plastic high temperature resistance test, drying and aging test box, direct sales manufacturer

1. Purpose:

Used for testing requirements in the glass industry, in accordance with the GB9962 standard, and can be used for heat resistance testing. This test box has the characteristics of easy operation, intuitive display, compact structure, and beautiful appearance.

Scope of application:

Applicable to the testing specifications for heat aging, cold resistance, and dry resistance of defense industry, aerospace industry automation components, automotive parts, electronic and electrical components, plastics, chemical industry, food industry, pharmaceutical industry, and related products, as well as the research and development of quality management engineering.

2、 Meet the standards:

GB/T2423.1-2 Basic Environmental Testing Procedures for Electrical and Electronic Products - Tests. A： Low temperature test method, Test B: High temperature test method

3、 Execution and compliance with standards:
1. GB/T10589-1989 Technical conditions for low-temperature test chambers;
2. GB/T10592-1989 Technical conditions for high and low temperature test chambers;
3. GB/T2423.4-93 (MIL-STD810) Method 507.2 Procedure 3;
4. GB2423.1 Low temperature test, test A

GB2423.2 High temperature test, test B GB/T2423.34-2005 High, Low, and Temperature Combined Cycle Test.

2. Technical indicators:

1. Temperature range: R · T+10-100 ℃
2. Volatility: ± 0.5 ℃
3. Heating time: 10-100 ℃ for about 6 minutes
4. Heating power: 4KW
5. 
   
6. working principle
   According to Ohm's Law, the measured resistance Rx is equal to the applied voltage V divided by the current I passing through, that is, R=V/I. The working principle of ordinary high resistance meters (mainly pointer high resistance meters and some commonly used digital high resistance meters) is to measure the fixed voltage V and obtain the resistance value by measuring the current I flowing through the sampling resistor. From the above equation, it can be seen that since the current I is inversely proportional to the resistance, rather than directly proportional, the displayed value of the resistance is nonlinear. That is, when the resistance is infinite, the current is zero, and the zero position of the meter head is ∞. The scale here is very dense and the resolution is very low. The entire scale is non-linear. Moreover, due to the variation in voltage V when measuring different resistances, it is difficult to improve the accuracy of ordinary high resistance meters.
   The EST120 digital high resistance meter simultaneously measures the voltage V across the resistor and the current I flowing through the resistor. It divides the voltage by the current through an internal large-scale integrated circuit, and then converts the result into a digital display of the resistance value through A/D conversion. Even if the voltage V across the resistor and the current I flowing through the resistor change simultaneously, the displayed resistance value does not change due to changes in the measured voltage V or current I like ordinary high resistance meters, so its measurement accuracy is very high. In theory, its error can be reduced to zero. And the actual error can reach a few thousandths or tens of thousands.
   4、 Typical applications
   1. Measure the resistance value of anti-static shoes and conductive shoes
   According to the standard GB4386-84 "Measurement method for resistance value of anti-static rubber soled shoes (boots) and conductive rubber soled shoes (boots)", the resistance value of anti-static shoes must be within the range of 0.5 × 105 Ω to 1.0 × 108 Ω, and the resistance value of conductive shoes must not exceed 1.5X105 Ω Not only must the manufacturing plant be inspected according to this standard before leaving the factory, but it must also be regularly inspected according to this standard during use in the factory, and only after passing the inspection can it be worn.
   
   2. Resistance and resistivity measurement of anti-static materials
   The resistance value of general anti-static materials is in the range of 1X105 Ω to 1x109 Ω, and their measured electricity can be three or two. The specific measurement method can refer to relevant standards or data.
   3. Measurement of system resistance value for raised floor in computer room
   According to the standard GB6650-86 "Technical Conditions for Access Flooring in Computer Rooms". Measure the electricity using this standard (or the main electricity among the three).
   4. Measurement of resistance (rate) of edge materials
   Edge materials such as plastics (polyethylene, polyvinyl chloride, nylon, etc.) and rubber have high electrical resistivity, and shielding measures should be taken during measurement to avoid unstable readings or even inability to measure. Three types of electricity can be used for measurement. The specific method can refer to the standard GB1410.
   5. Conductivity measurement
   This instrument can directly read and measure conductivity or electric conductivity.
   6. Measure conductivity and high resistance
   The method of measuring conductivity is basically the same as measuring resistance, except that the switch should be placed in the "conductivity" position during measurement. This method can be used to measure 1X1015 Ω resistance.