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Constant temperature and humidity machine
Specification of touch screen table type constant temperature and humidity test box controller: fault prompt screen and display function. The screen display protection function can be set by timing, timer or manual closing
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The inner box material: SUS 304 1.0 mm mirror stainless steel plate B. outer box material: steel plate spray treatment or stainless steel sand grain treatment C. insulation material: PV rigid foam + glass wool
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The working principle of zhenghang microcomputer constant temperature and humidity box: ; 1. The constant temperature and humidity control system controls SSR in PID mode, so that the heating and humidification amount of the system is equal to the heat and humidity loss. 2. The temperature measurement signal of the dry and wet bulb is input into the controller CPU through a / D conversion and output to the I / O board by comparing with ran. The I / O board sends instructions to make the air supply system and refrigeration system work, and PID controls the SSR or heating SSR In order to achieve constant temperature and humidity regulation, or humidification SSR is used to make the heat and humidity evenly pass through the air supply system test box
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The controller of the control system of the high temperature and humidity test chamber can automatically adjust the operating conditions of the refrigerator according to the test conditions. ...
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Using the latest fuzzy algorithm, the latest technology control, automatic adjustment of cold coal flow, effectively take away the heating load of the tested object, so as to achieve the best effect. More than 20% of power consumption can be saved by using micro-computer servo control. The intelligent automatic conversion expansion system is adopted to automatically adjust the refrigerant flow rate according to the load + the intelligent electric heating power data value (%) to match the automatic analog output power data output value of temperature rise (load). This design can save more than 30% power than the traditional design. ...
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It is also used to test the performance of various materials, such as constant temperature chamber, constant temperature chamber, constant temperature chamber, etc. ...
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LED display panel constant temperature and humidity machine | small environmental test box air circulation system: , adopt multi wing centrifugal circulation fan, strengthen the shaft center and made of high and low temperature resistant rotating blade aluminum alloy to achieve forced convection. The air supply mode is flow through, horizontal diffusion and vertical heat exchange arc cycle. Adjustable side blowing outlet and protective mesh return air outlet. ...
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LCD display temperature and humidity test | standard configuration of temperature and humidity verification box: , observation window (lighting in the box), one Φ 50mm cable hole (located on the left connection), two sets of sample holder (height adjustable), mobile working wheel, humidifying water tank , optional communication interface, recorder, built-in glass door and operation hole, connected with computer and printing software ...
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Intelligent constant temperature and humidity test box for photoelectric industry | papermaking constant temperature and humidity laboratory features: , in the intelligent constant temperature and humidity test box | papermaking constant temperature and humidity laboratory, the former door is abandoned, and now single door, single window, left open is adopted. The flat embedded handle is equipped with double heat insulation and air tightness, which can insulate the internal and external heat exchange outside the box. The intelligent constant temperature and humidity test box is adopted. The observation window of the paper-making constant temperature and humidity laboratory adopts three layers of vacuum glass, which is convenient to observe the test object. High brightness window lamp is added to facilitate the observation of the test object Test case | the inner and outer boxes of the paper-making constant temperature and humidity laboratory are made of high-quality stainless steel plates, which are corrosion-resistant and high-temperature resistant, and the appearance is more beautiful and generous. In terms of intelligent constant temperature and humidity test box, paper-making constant temperature and humidity laboratory insulation layer, some heat preservation methods are also proposed, that is, the latest insulation layer (rigid polyurethane foam + glass wool, 10 mm thick) is adopted, which can achieve very good temperature preservation effect. ...
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LCD display self-made incubator | automatic incubator features , high texture appearance, the body adopts arc shape, the surface is treated by fog surface stripe, and adopts plane non reaction handle, which is easy to operate, safe and reliable. The rectangular multi-layer glass viewing window can be used to observe the test object in the test. The window is equipped with an anti sweat electric heater device, which can prevent water vapor condensation and water droplets, and the high brightness PL fluorescent lamp can keep the lighting in the box. The double-layer insulation and tight air tightness of the box door can effectively isolate the internal temperature leakage. It is convenient to supplement the water supply of humidifying bucket and automatically recycle it. The compressor circulation system adopts French "Taikang" brand, which can more effectively remove the lubricating oil between the condenser tube and the capillary tube, and the whole series of environmentally friendly refrigerants (R23, R404, r507) are used. The controller adopts imported LCD display screen, which can display the measured value, set value and time at the same time. The controller has multi-stage program editing and temperature and humidity can be controlled by Ouick or slope. The built-in movable pulley is easy to move and place, and has strong positioning screw fixed position
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Solar high temperature and humidity testing machine
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Qingdao - rapid temperature change test chamber refrigeration system, centrifugal constant temperature and humidity test chamber is composed of centrifugal compressor, evaporator, condenser, lubrication system and electrical control system. The compressors of centrifugal constant temperature and humidity test chamber for air conditioning have single-stage (refrigerant R134a, R22) and multistage (refrigerant R123). The condenser of centrifugal constant temperature and humidity test chamber is generally shell and tube heat exchanger, and the evaporator is generally full of liquid shell and tube. The liquid separation tank makes the refrigerant evenly distributed in the whole cylinder length. The refrigeration efficiency of centrifugal constant temperature and humidity test chamber is high, but it is low at low load and prone to "surge". ...
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Super capacitor battery constant temperature and humidity machine - General requirements for selection of test conditions , in general, the reliability of reliability test verification mostly refers to the reliability under typical conditions or general conditions in actual use, rather than the reliability under special or extreme conditions. Therefore, the most typical and representative conditions in field use should be selected for test conditions. However, sometimes (especially in the qualification test) in order to test the equipment's ability to withstand certain special conditions in the shortest cycle under special environment or extreme conditions, or to understand the reliability level of the equipment under the worst conditions, the above-mentioned
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The samples for reliability acceptance test and reliability acceptance test of polymer lithium battery shall be randomly selected from the batch equipment which has taken the same aging pretreatment measures and passed the acceptance according to the normal acceptance procedures. The extracted test samples shall not be subject to direct, indirect or any other special pre aging, and maintenance beyond the normal maintenance procedures specified in the test scheme shall not be adopted. The extracted test samples shall be tested and inspected before the specified test cycle starts, and the specified main performance indexes and specified functions shall meet the requirements of equipment technical standards. In case of disqualification, additional sampling shall be conducted. The unqualified phenomena shall be recorded in detail, and the unqualified products shall be submitted to the factory quality management department for analysis and treatment. ...
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Features of condenser microphone constant temperature and humidity machine: working principle of scroll compressor of condenser microphone constant temperature and humidity machine 1-static scroll plate 2-moving scroll plate 3-maximum compression volume 4-exhaust port 5-refrigerant suction point 6-minimum compression volume volume gradually moves to the center and decreases, so that the refrigerant is compressed and finally discharged axially through the exhaust orifice in the center It is the whole cycle of suction, compression and exhaust. ...
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In order to better protect the testing machine, a special moisture-proof and heat dissipation design is added. In particular, the lengthened axial cycle motor uses stainless steel + high / low temperature resistant multi wing circulation centrifugal wind wheel, which is made of aluminum alloy. Qingdao - constant temperature and humidity test box air outlet adopts the latest design, which can ensure that there is air circulation in each position, and the uniformity is very high. The outlet design is positive pressure type. ...
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Special high temperature and humidity test chamber for optocoupler - the measures taken when the hypothesis is rejected . If the hypothesis of constant failure rate is rejected by the effectiveness test, it is beneficial to further analyze the data in order to determine the reason for rejection and take appropriate measures to obtain evaluation information. Since the assumption of constant failure rate is rejected, the premise of statistical test scheme for reliability test is not satisfied. At the same time, it will be a problem to judge whether the reliability test is qualified according to the judgment standard. At the same time, the estimation method of MTBF verification value can not use the estimation method of exponential distribution hypothesis recommended in section 17.7. We can find other more suitable distribution hypotheses and process the observed data according to the corresponding methods without any new changes to the equipment under test. ...
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Therefore, the understanding of "what is the reliability test" can be simply said that the test to evaluate and analyze the reliability of products is called reliability test. It can also be defined as: in the laboratory, the method to determine the equipment reliability by simulating the field working conditions and environmental conditions is called reliability test. Unless otherwise specified, the commonly known reliability test refers to the indoor simulated reliability test. ...
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