Service conditions for high, low temperature, and low pressure test chambers
One of the usage conditions for high, low temperature, and low pressure test chambers: environmental conditions
a、 Temperature: 15 ℃~35 ℃;
b、 Relative humidity: not exceeding 85%;
c、 Atmospheric pressure: 80kPa~106kPa
d、 There is no strong vibration or corrosive gas in the surrounding area;
e、 No direct sunlight exposure or direct radiation from other cold or heat sources;
f、 There is no strong airflow around, and when the surrounding air needs to be forced to flow, the airflow should not be directly blown onto the box;
g、 The influence of magnetic field on the control circuit of the interference free test box in the surrounding area;
h、 There is no high concentration of dust or corrosive substances in the surrounding area.
Condition 2 for the use of high, low temperature, and low pressure test chambers: Power supply conditions
a、 AC voltage: 220V ± 22V or 380V ± 38V;
b、 Frequency: 50HZ ± 0.5HZ
Condition Three for the Use of High, Low Temperature, and Low Pressure Test Chambers: Water Supply Conditions
It is advisable to use tap water or circulating water that meets the following conditions:
a、 Water temperature: not higher than 30 ℃;
b、 Water pressure: 0.1MPa~0.3MPa;
c、 Water quality: meets industrial water standards.
Condition 4 for the use of high, low temperature, and low pressure test chambers: Test load conditions
The load of the test chamber should meet the following conditions every week:
a、 The total mass of the load shall not exceed 80KG per cubic meter within the working chamber volume
b、 The total volume of the load shall not exceed 5/1 of the working chamber volume
c、 On any cross-section perpendicular to the prevailing wind direction, the sum of the load areas should not exceed 3/1 of the cross-sectional area of the working chamber at that location, and the load should not obstruct the flow of airflow when placed.
Dear customer:
Our company has products such as rapid temperature change test chambers, UV accelerated weather resistance testing machines, and temperature and humidity control chambers. You can call our service hotline through our website to learn more about our products. Our pursuit is endless, and we welcome new and old customers to choose their favorite products with confidence. We will be dedicated to serving you!
Precision Oven Manual
Precision ovens are suitable for semiconductor devices in the electronic industry, curing and aging of electronic components, high-temperature precision testing of plastic and rubber, molding processes for telephone handle wires, as well as experimental or workshop production lines in higher education research institutions and industrial and mining enterprises that require high product temperatures.
This instrument is equipped with a two-level temperature control system, dual protection, automatic cut-off for overheating, safe and reliable. The column alarm device has a temperature rise and constant temperature light display. When using this instrument in large quantities in the production workshop, which instrument has reached the constant temperature requirement and which one is still in the heating state can be clearly seen.
The instrument liner is made of high-quality mirror stainless steel, the outer shell is sprayed with plastic, and a safety door lock is installed. The front door adopts a high-temperature resistant glass observation window, which can observe the condition of the test piece inside the box at any time.
Dear customer:
Our company has products such as rapid temperature change test chambers, UV accelerated weather resistance testing machines, and temperature and humidity control chambers. You can call our service hotline through our website to learn more about our products. Our pursuit is endless, and we welcome new and old customers to choose their favorite products with confidence. We will be dedicated to serving you!
A Brief Analysis of the Five Characteristics of Walk in Laboratories
The walk-in laboratory has been upgraded on the basis of the original walk-in laboratory, with the characteristics of large testing space and operators being able to operate the test products in the laboratory, providing conditions for temperature and humidity environment testing for industrial manufacturers' batch or large parts, semi-finished products, and finished products. Adopting advanced Chinese LCD display screen touch screen, various complex program settings can be carried out. The program settings adopt dialogue mode, and the operation is simple and fast. It can achieve automatic operation of the refrigeration machine, maximizing automation, and can be equipped with LAN communication interfaces for users to remotely process and centrally control. It can record temperature and temperature parameters for 90 days, and is equipped with a paperless recorder.
5 characteristics of walk-in laboratory
1. Having an extremely wide temperature and humidity control range, it can meet various needs of users. By adopting a unique balanced temperature and humidity control method, a safe and precise temperature and humidity environment can be achieved. Having stable and balanced heating and humidification performance, it can achieve high-precision and highly stable temperature and humidity control.
2. Equipped with high-precision intelligent temperature regulators, temperature and humidity are displayed using LED digital display. Optional temperature and humidity recorder.
3. The refrigeration circuit is automatically selected, and the automatic control device has the performance of automatically selecting and operating the refrigeration circuit according to the set value of temperature, achieving direct start of the refrigeration machine and direct cooling under high temperature conditions.
4. The inner door is equipped with a large observation window, which facilitates the observation of the experimental status of the test samples.
5. Equipped with advanced safety and protection devices - residual current circuit breaker, over temperature protector, phase loss protector, and water cut-off protector.
Dear customer:
Our company has products such as rapid temperature change test chambers, UV accelerated weather resistance testing machines, and temperature and humidity control chambers. You can call our service hotline through our website to learn more about our products. Our pursuit is endless, and we welcome new and old customers to choose their favorite products with confidence. We will be dedicated to serving you!
User selection environment test box must read
1、 Equipment selection criteria
There is currently no exact number of natural environmental factors and induced environmental factors that exist on the surface of the Earth and in the atmosphere, among which there are no less than a dozen factors that have a significant impact on the use and lifespan of engineering products (equipment). Engineers engaged in the study of environmental conditions for engineering products have compiled and summarized the environmental conditions that exist in nature and are induced by human activities into a series of testing standards and specifications to guide the environmental and reliability testing of engineering products. For example, GJB150- the National Military Standard of the People's Republic of China for Environmental Testing of Military Equipment, and GB2423- the National Standard of the People's Republic of China for Environmental Testing of Electrical and Electronic Products, which guides environmental testing of electrical and electronic products. Therefore, the main basis for selecting environmental and reliability testing equipment is the testing specifications and standards of engineering products.
Secondly, in order to standardize the tolerance of environmental testing conditions in experimental equipment and ensure the control accuracy of environmental parameters, national technical supervision agencies and various industrial departments have also formulated a series of calibration regulations for environmental testing equipment and detection instruments. Such as the national standard GB5170 of the People's Republic of China "Basic Parameter Calibration Method for Environmental Testing Equipment of Electrical and Electronic Products", and JJG190-89 "Trial Calibration Regulations for Electric Vibration Test Stand System" issued and implemented by the State Administration of Technical Supervision. These verification regulations are also an important basis for selecting environmental and reliability testing equipment. Testing equipment that does not meet the requirements of these verification regulations is not allowed to be put into use.
2、 Basic principles for equipment selection
The selection of environmental and reliability testing equipment should follow the following five basic principles:
1. Reproducibility of environmental conditions
It is impossible to fully and accurately reproduce the environmental conditions that exist in nature in the laboratory. However, within a certain tolerance range, people can accurately and approximately simulate the external environmental conditions that engineering products undergo during use, storage, transportation, and other processes. This passage can be summarized in engineering language as follows: "The environmental conditions (including platform environment) created by the testing equipment around the tested product should meet the requirements of the environmental conditions and their tolerances specified in the product testing specifications. The temperature box used for military product testing should not only meet the requirements of the national military standards GJB150.3-86 and GJB150.4-86 for different uniformity and temperature control accuracy. Only in this way can the reproducibility of environmental conditions be ensured in environmental testing.
2. Repeatability of environmental conditions
An environmental testing equipment may be used for multiple tests of the same type of product, and a tested engineering product may also be tested in different environmental testing equipment. In order to ensure the comparability of test results obtained for the same product under the same environmental testing conditions specified in the testing specifications, it is necessary to require the environmental conditions provided by the environmental testing equipment to be reproducible. This means that the stress levels (such as thermal stress, vibration stress, electrical stress, etc.) applied by environmental testing equipment to the tested product are consistent with the requirements of the same testing specification.
The repeatability of environmental conditions provided by environmental testing equipment is guaranteed by the national metrological verification department after passing the verification according to the verification regulations formulated by the national technical supervision agency. Therefore, it is necessary to require environmental testing equipment to meet the requirements of various technical indicators and accuracy indicators in the calibration regulations, and to not exceed the time limit specified in the calibration cycle in terms of usage time. If a very common electric vibration table is used, in addition to meeting technical indicators such as excitation force, frequency range, and load capacity, it must also meet the requirements of precision indicators such as lateral vibration ratio, table acceleration uniformity, and harmonic distortion specified in the calibration regulations. Moreover, the service life after each calibration is two years, and after two years, it must be re calibrated and qualified before being put into use.
3. Measurability of environmental condition parameters
The environmental conditions provided by any environmental testing equipment must be observable and controllable. This is not only to limit the environmental parameters within a certain tolerance range and ensure the reproducibility and repeatability of the test conditions, but also necessary for the safety of product testing, in order to prevent damage to the tested product caused by uncontrolled environmental conditions and unnecessary losses. At present, various experimental standards generally require that the accuracy of parameter testing should not be less than one-third of the allowable error under experimental conditions.
4. Exclusion of environmental testing conditions
Every time an environmental or reliability test is conducted, there are strict regulations on the category, magnitude, and tolerance of environmental factors, and non test required environmental factors are excluded from penetrating into it, in order to provide a definite basis for judging and analyzing product failure and fault modes during or after the test. Therefore, it is required that environmental testing equipment not only provide the specified environmental conditions, but also not allow any other environmental stress interference to be added to the tested product. As defined in the verification regulations for electric vibration tables, the table leakage magnetic flux, acceleration signal-to-noise ratio, and total root mean square value ratio of in band and out of band acceleration. The accuracy indicators such as random signal verification and harmonic distortion are all established as verification items to ensure the uniqueness of environmental testing conditions.
5. Safety and reliability of experimental equipment
Environmental testing, especially reliability testing, has a long testing cycle and sometimes targets high-value military products. During the testing process, testing personnel often need to operate, inspect or test around the site. Therefore, it is required that environmental testing equipment must have the characteristics of safe operation, convenient operation, reliable use, and long working life to ensure the normal progress of the testing itself. The various protection, alarm measures, and safety interlock devices of the testing equipment should be complete and reliable to ensure the safety and reliability of the testing personnel, the tested products, and the testing equipment itself.
3、 Selection of Temperature and Humidity Chamber
1. Selection of Capacity
When placing the test product (components, assemblies, parts or whole machine) into a climate chamber for testing, in order to ensure that the atmosphere around the test product can meet the environmental testing conditions specified in the test specifications, the working dimensions of the climate chamber and the overall dimensions of the test product should follow the following regulations:
a) The volume of the tested product (W × D × H) shall not exceed (20-35)% of the effective working space of the test chamber (20% is recommended). For products that generate heat during testing, it is recommended to use no more than 10%.
b) The ratio of the windward cross-sectional area of the tested product to the total area of the test chamber on that section shall not exceed (35-50)% (35% is recommended).
c) The distance between the outer surface of the tested product and the wall of the test chamber should be kept at least 100-150mm (recommended 150mm).
The above three provisions are actually interdependent and unified. Taking a 1 cubic meter cube box as an example, an area ratio of 1: (0.35-0.5) is equivalent to a volume ratio of 1: (0.207-0.354). A distance of 100-150mm from the box wall is equivalent to a volume ratio of 1: (0.343-0.512).
In summary, the working chamber volume of the climate environment test chamber should be at least 3-5 times the external volume of the tested product. The reasons for making such regulations are as follows:
After the test piece is placed in the box, it occupies the smooth channel, and narrowing the channel will lead to an increase in airflow velocity. Accelerate the heat exchange between the airflow and the test piece. This is inconsistent with the reproduction of environmental conditions, as relevant standards stipulate that the air flow velocity around the test specimen in the test chamber should not exceed 1.7m/s for temperature environmental tests, in order to prevent the test specimen and the surrounding atmosphere from generating heat conduction that is not in line with reality. When unloaded, the average wind speed inside the test chamber is 0.6-0.8m/s, not exceeding 1m/s. When the space and area ratio specified in points a) and b) are met, the wind speed in the flow field may increase by (50-100)%, with an average maximum wind speed of (1-1.7) m/s. Meet the requirements specified in the standards. If the volume or windward cross-sectional area of the test piece is increased without restrictions during the experiment, the actual airflow speed during the test will exceed the maximum wind speed specified in the test standard, and the validity of the test results will be questioned.
The accuracy indicators of environmental parameters in the working chamber of the climate chamber, such as temperature, humidity, salt spray settling rate, etc., are all measured under no-load conditions. Once the test piece is placed, it will have an impact on the uniformity of the environmental parameters in the working chamber of the test chamber. The larger the space occupied by the test piece, the more severe this impact will be. Experimental data shows that the temperature difference between the windward and leeward sides in the flow field can reach 3-8 ℃, and in severe cases, it can be as high as 10 ℃ or more. Therefore, it is necessary to meet the requirements of a] and b] as much as possible to ensure the uniformity of environmental parameters around the tested product.
According to the principle of heat conduction, the temperature of the airflow near the box wall is usually 2-3 ℃ different from the temperature at the center of the flow field, and may even reach 5 ℃ at the upper and lower limits of high and low temperatures. The temperature of the box wall differs from the temperature of the flow field near the box wall by 2-3 ℃ (depending on the structure and material of the box wall). The greater the difference between the test temperature and the external atmospheric environment, the greater the temperature difference. Therefore, the space within a distance of 100-150mm from the box wall is unusable.
2. Selection of temperature range
At present, the range of temperature test chambers abroad is generally -73 to+177 ℃, or -70 to+180 ℃. Most domestic manufacturers generally operate at -80 to+130 ℃, -60 to+130 ℃, -40 to+130 ℃, and there are also high temperatures up to 150 ℃. These temperature ranges can usually meet the temperature testing needs of the vast majority of military and civilian products in China. Unless there are special requirements, such as products installed near heat sources such as engines, the upper temperature limit should not be blindly increased. Because the higher the upper limit temperature, the greater the temperature difference between the inside and outside of the box, and the poorer the uniformity of the flow field inside the box. The smaller the available studio size. On the other hand, the higher the upper limit temperature value, the higher the heat resistance requirements for insulation materials (such as glass wool) in the interlayer of the box wall. The higher the requirement for the sealing of the box, the higher the production cost of the box.
3. Selection of humidity range
The humidity indicators given by domestic and foreign environmental test chambers are mostly 20-98% RH or 30-98% RH. If the humid heat test chamber does not have a dehumidification system, the humidity range is 60-98%. This type of test chamber can only perform high humidity tests, but its price is much lower. It is worth noting that the corresponding temperature range or minimum dew point temperature should be indicated after the humidity index. Because relative humidity is directly related to temperature, for the same absolute humidity, the higher the temperature, the lower the relative humidity. For example, if the absolute humidity is 5g/Kg (referring to 5g of water vapor in 1kg of dry air), when the temperature is 29 ℃, the relative humidity is 20% RH, and when the temperature is 6 ℃, the relative humidity is 90% RH. When the temperature drops below 4 ℃ and the relative humidity exceeds 100%, condensation will occur inside the box.
To achieve high temperature and high humidity, simply spray steam or atomized water droplets into the air of the box for humidification. Low temperature and humidity are relatively difficult to control because the absolute humidity at this time is very low, sometimes much lower than the absolute humidity in the atmosphere. It is necessary to dehumidify the air flowing inside the box to make it dry. At present, the vast majority of temperature and humidity chambers both domestically and internationally adopt the principle of refrigeration and dehumidification, which involves adding a set of refrigeration light pipes to the air conditioning room of the chamber. When humid air passes through a cold pipe, its relative humidity will reach 100% RH, as the air saturates and condenses on the light pipe, making the air drier. This dehumidification method theoretically can reach dew point temperatures below zero degrees, but when the surface temperature of the cold spot reaches 0 ℃, the water droplets condensed on the surface of the light pipe will freeze, affecting the heat exchange on the surface of the light pipe and reducing the dehumidification capacity. Also, because the box cannot be completely sealed, humid air from the atmosphere will seep into the box, causing the dew point temperature to rise. On the other hand, the moist air flowing between the light tubes only reaches saturation at the moment of contact with the light tubes (cold spots) and releases water vapor, so this dehumidification method is difficult to keep the dew point temperature inside the box below 0 ℃. The actual minimum dew point temperature achieved is 5-7 ℃. A dew point temperature of 5 ℃ is equivalent to an absolute moisture content of 0.0055g/Kg, corresponding to a relative humidity of 20% RH at a temperature of 30 ℃. If a temperature of 20 ℃ and a relative humidity of 20% RH are required, with a dew point temperature of -3 ℃, it is difficult to use refrigeration for dehumidification, and an air drying system must be selected to achieve it.
4. Selection of control mode
There are two types of temperature and humidity test chambers: constant test chamber and alternating test chamber.
The ordinary high and low temperature test chamber generally refers to a constant high and low temperature test chamber, which is controlled by setting a target temperature and has the ability to automatically maintain a constant temperature to the target temperature point. The control method of the constant temperature and humidity test chamber is also similar, setting a target temperature and humidity point, and the test chamber has the ability to automatically maintain a constant temperature to the target temperature and humidity point. The high and low temperature alternating test chamber has one or more programs for setting high and low temperature changes and cycles. The test chamber has the ability to complete the test process according to the preset curve, and can accurately control the heating and cooling rates within the maximum heating and cooling rate capability range, that is, the heating and cooling rates can be controlled according to the slope of the set curve. Similarly, the high and low temperature alternating humidity test chamber also has preset temperature and humidity curves, and the ability to control them according to the preset. Of course, alternating test chambers have the function of constant test chambers, but the manufacturing cost of alternating test chambers is relatively high because they need to be equipped with curve automatic recording devices, program controllers, and solve problems such as turning on the refrigeration machine when the temperature in the working room is high. Therefore, the price of alternating test chambers is generally more than 20% higher than that of constant test chambers. Therefore, we should take the need for experimental methods as the starting point and choose a constant test chamber or an alternating test chamber.
5. Selection of variable temperature rate
Ordinary high and low temperature test chambers do not have a cooling rate indicator, and the time from the ambient temperature to the nominal lowest temperature is generally 90-120 minutes. The high and low temperature alternating test chamber, as well as the high and low temperature alternating wet heat test chamber, both have temperature change speed requirements. The temperature change speed is generally required to be 1 ℃/min, and the speed can be adjusted within this speed range. The rapid temperature change test chamber has a fast temperature change rate, with heating and cooling rates ranging from 3 ℃/min to 15 ℃/min. In certain temperature ranges, the heating and cooling rates can even reach over 30 ℃/min.
The temperature range of various specifications and speeds of rapid temperature change test chambers is generally the same, that is, -60 to+130 ℃. However, the temperature range for assessing the cooling rate is not the same. According to different test requirements, the temperature range of rapid temperature change test chambers is -55 to+80 ℃, while others are -40 to+80 ℃.
There are two methods for determining the temperature change rate of the rapid temperature change test chamber: one is the average temperature rise and fall rate throughout the entire process, and the other is the linear temperature rise and fall rate (actually the average speed every 5 minutes). The average speed throughout the entire process refers to the ratio of the difference between the highest and lowest temperatures within the temperature range of the test chamber to the time. At present, the technical parameters of temperature change rate provided by various environmental testing equipment manufacturers abroad refer to the average rate throughout the entire process. The linear temperature rise and fall rate refers to the guaranteed temperature change rate within any 5-minute time period. In fact, for the rapid temperature change test chamber, the most difficult and critical stage to ensure the linear temperature rise and fall speed is the cooling rate that the test chamber can achieve during the last 5 minutes of the cooling period. From a certain perspective, the linear heating and cooling speed (average speed every 5 minutes) is more scientific. Therefore, it is best for the experimental equipment to have two parameters: the average temperature rise and fall speed throughout the entire process and the linear temperature rise and fall speed (average speed every 5 minutes). Generally speaking, the linear heating and cooling speed (average speed every 5 minutes) is half of the average heating and cooling speed throughout the entire process.
6. Wind speed
According to relevant standards, the wind speed inside the temperature and humidity chamber during environmental testing should be less than 1.7m/s. For the test itself, the lower the wind speed, the better. If the wind speed is too high, it will accelerate the heat exchange between the surface of the test piece and the airflow inside the chamber, which is not conducive to the authenticity of the test. But in order to ensure uniformity within the testing chamber, it is necessary to have circulating air inside the testing chamber. However, for rapid temperature change test chambers and comprehensive environmental test chambers with multiple factors such as temperature, humidity, and vibration, in order to pursue the rate of temperature change, it is necessary to accelerate the flow velocity of the circulating airflow inside the chamber, usually at a speed of 2-3m/s. Therefore, the wind speed limit varies for different usage purposes.
7. Temperature fluctuation
Temperature fluctuation is a relatively easy parameter to implement, and most test chambers produced by environmental testing equipment manufacturers can actually control temperature fluctuations within a range of ± 0.3 ℃.
8. Uniformity of temperature field
In order to simulate the actual environmental conditions that products experience in nature more accurately, it is necessary to ensure that the surrounding area of the tested product is under the same temperature environment conditions during environmental testing. Therefore, it is necessary to limit the temperature gradient and temperature fluctuation inside the test chamber. In the General Principles of Environmental Test Methods for Military Equipment (GJB150.1-86) of the National Military Standard, it is clearly stipulated that "the temperature of the measurement system near the test sample should be within ± 2 ℃ of the test temperature, and its temperature should not exceed 1 ℃/m or the total maximum value should be 2.2 ℃ (when the test sample is not working).
9. Precision control of humidity
The humidity measurement in the environmental testing chamber mostly adopts the dry wet bulb method. The manufacturing standard GB10586 for environmental testing equipment requires that the relative humidity deviation should be within ± 23% RH. To meet the requirements of humidity control accuracy, the temperature control accuracy of the humidity test chamber is relatively high, and the temperature fluctuation is generally less than ± 0.2 ℃. Otherwise, it will be difficult to meet the requirements for humidity control accuracy.
10. Cooling method selection
If the test chamber is equipped with a refrigeration system, the refrigeration system needs to be cooled. There are two forms of test chambers: air-cooled and water-cooled.
Forced air cooling
Water-cooling
Working conditions
The equipment is easy to install, only need to power on.
The ambient temperature should be lower than 28℃. If the ambient temperature is higher than 28℃, it has a certain impact on the refrigeration effect (preferably with air conditioning), the circulating cooling water system should be configured.
Heat exchange effect
Poor (relative to the water-cooling mode)
Stable, good
Noise
Large (relative to the water-cooling mode)
Less
EC-85EXT, Bain supérieur à température constante (800L)SpécificationsProjetTaperSérieＥＸＴFonctionLa température se produit d'une manièreMéthode de la balle sècheVentilateur de température Yin-70 ～ + 150 ℃Amplitude de l'ovulation de la températureEn dessous des + 100℃± 0,3 ℃Au-dessus du + 101℃± 0,5 ℃Répartition de la températureEn dessous des + 100℃± 0. 7 ℃Au-dessus du + 101℃± 1,0 ℃La température baisse le temps＋125 ～－55 ℃Dans les 36 minutes (changement de température moyen de 10 ℃/minute)Temps de montée en température－55 ～＋125 ℃Dans les 36 minutes (changement de température moyen de 10 ℃/minute)Le volume interne de l'utérus a été testé800ＬMéthode des pouces de la salle d'essai (largeur, profondeur et hauteur)1000 mm × 800 mm × 1000 mmMéthode en pouces du produit (largeur, profondeur et hauteur)1470 mm × 2240 mm × 2000 mmFabriquer le matériel Tenue externe Panneau de contrôle de la salle d'essaisalle des machinesLa plaque d'acier interductile à froid est gris foncéÀ l'intérieurPlaque en acier inoxydable (SUS304,2B polie)Matériau thermique briséTester l'utérusRésine synthétique durelaine de verreporteCoton mousse de résine synthétique dure, coton de verreProjetTaperSérieＥＸＴDispositif de déshumidification par refroidissement Méthode de refroidissementMode de retrait et de congélation de section mécanique et mode de congélation binaire Fluide de refroidissementCôté monosegmentR404ACôté binaire haute température/basse températureR404A / R23Refroidissement et déshumidificateurType de dissipateur thermique mixte multicanalLe condenseur(refroidi par eau)CalorificateurFormulaireÉlément chauffant en alliage nickel-chrome résistant à la chaleurVentilateurFormulaireRemuer le ventilateur ContrôleurLa température est réglée-72,0 ～ +152,0 ℃Mise à l'heure Fanny0 ～ 999 Durée 59 minutes (type programmé)0 ～ 20000 Temps 59 minutes (valeur)Définir l'énergie de décomposition Température 0,1 ℃, Temps de 1 minuteIndiquer la précisionTempérature ± 0,8 ℃ (typ.), temps ± 100 PPMType de vacancesValeur ou programmeNuméro d'étape20 étapes / 1 programmeLe nombre de procéduresLe nombre maximum de programmes de force entrants (RAM) est de 32 programmesLe nombre maximum de programmes ROM internes est de 13 programmesNuméro aller-retourMaximum de 98 ou illimitéNombre de répétitions aller-retourMaximum 3 foisDéplacer la finPt 100Ω （ à 0 ℃ ），grade （ JIS C 1604-1997 ）Action de contrôleLors du fractionnement de l'action PIDFonction endovirusFonction de livraison anticipée, fonction de veille, fonction de maintenance de la valeur de réglage, fonction de protection contre les pannes de courant,Fonction de sélection d'action de puissance, fonction de maintenance, fonction de transport aller-retour,Fonction de livraison de temps, fonction de sortie de signal horaire, fonction de prévention de surchauffe et de refroidissement excessif,Fonction de représentation anormale, fonction de sortie d'alarme externe, fonction de représentation de paradigme de réglage,Fonction de sélection du type de transport, le temps de calcul représente la fonction, la fonction de lampe à fenteProjetTaperSérieＥＸＴPanneau de contrôleMachine d'équipementPanneau de commande LCD (type panneau de contacts),Représente la lampe (alimentation, transport, anormal), borne d'alimentation de test, borne d'alarme externe,Borne de sortie du signal horaire, connecteur du cordon d'alimentation Dispositif de protectionCycle de réfrigérationDispositif de protection contre les surcharges, dispositif de blocage élevéCalorificateurDispositif de protection contre l'augmentation de la température, fusible de températureVentilateurDispositif de protection contre les surchargesPanneau de contrôleDisjoncteur de fuite pour alimentation électrique, fusible (chauffage,),Fusible (pour boucle de fonctionnement), dispositif de protection contre l'échauffement (pour tests),Dispositif de prévention du surrefroidissement et de l'augmentation de la température (matériel de test, dans un micro-ordinateur)Le paiement appartient au produitMatériel de test versé par * 8Hangar inox (2), réception de hangar (4)FusibleFusibles de protection de boucle de fonctionnement (2)Spécification de fonctionnement（1 ） AutreBolus (Trou de câble : 1)Produits d'équipementAdventiceVerre borosilicaté dur270 mm × 190 mm１ Trou de câbleAlésage 50 mm１ Le creux à l'intérieur de la lampeBoule chaude blanche AC100V 15W１ Roue 6 Ajustement horizontal 6 Caractéristiques de l'électrovirusSource ＊ 5.1CA Triophasé 380V 50HzCourant de charge maximal60 ACapacité du disjoncteur de fuite pour l'alimentation électrique80ACourant sensoriel 30mAÉpaisseur de distribution de puissance60 mm２Tuyau d'isolation en caoutchoucGrossièreté du fil de terre14 mm２ Eau de refroidissement ＊ 5,3Rendement en eau5 000 L/h (Lorsque la température d'entrée de l'eau de refroidissement est de 32 ℃)Pression de l'eau0,1 ～ 0,5MPaDiamètre du tuyau latéral de l'appareilPT1 1/4 Tubes tuyau d'évacuation ＊ 5.4TP1/2Poids du produit700 kg
Chambre d'essai de choc thermique vertical de grand volumeEn alternant le mouvement de l'éprouvette entre la chambre froide et la chambre chaude, la chambre d'essai de choc thermique peut appliquer un taux de changement de température très, très rapide à l'éprouvette, ce qui peut exposer d'éventuels défauts et également être utilisée pour définir le durée de vie de l'éprouvette.La chambre d'essai de choc thermique du modèle Lab Companion TS-2 est principalement utilisée pour les charges lourdes. De par sa structure compacte et son faible encombrement, il est particulièrement recommandé pour une utilisation dans les lignes de production.Lab Companion dispose d'un institut de recherche spécialisé dans le développement d'équipements d'essais environnementaux, avec des méthodes et des laboratoires de recherche en matière d'essais environnementaux matures. Il a rassemblé un groupe d'excellents talents et d'experts bien connus dans l'industrie, et une solide équipe de R&D dirige le développement de la technologie nationale d'essais environnementaux. Actuellement, la société dispose de droits de propriété intellectuelle indépendants sur les équipements de tests environnementaux, les équipements de tests de fiabilité, chambres d'essais à haute et basse température, chambres d'essai d'humidité à haute et basse température, chambres d'essai à température et humidité constantes, chambres d'essai à changement rapide de température, chambres d'essai d'impact à froid et à chaud, trois chambres d'essai complètes, chambres d'essai à haute et basse température et basse pression, chambres d'essai de rayonnement solaire, industrielles fours, chambres d'essai d'impact froid et chaud, chambres d'essai à température et humidité constantes, chambres d'essai de dépistage des contraintes environnementales, chambres d'essai à température et humidité constantes, chambres d'essai d'impact à haute et basse température. Boîte, machine d'essai de température et d'humidité constantes, boîte d'essai de température et d'humidité constantes, boîte d'essai de rayonnement solaire, chambre d'essai d'humidité à haute et basse température, chambre de contrôle de température et d'humidité, machine d'essai de vieillissement accéléré par UV, machine d'essai de résistance aux intempéries accélérée par UV, marche- dans la chambre d'essai, chambre d'essai environnemental sans rendez-vous, chambre d'essai sans rendez-vous à haute et basse température, chambre d'essai de contrôle de température et d'humidité, chambre d'essai de résistance climatique UV, testeur de vieillissement UV, chambre d'essai basse pression haute et basse température, température rapide chambre d'essai de cyclisme, chambre d'essai de température et d'humidité constantes sans rendez-vous, chambre d'essai d'humidité à haute et basse température, four de précision, chambre d'essai de température et d'humidité constantes programmables, machine d'essai de température et d'humidité constantes programmables, chambre d'essai de vieillissement de lampe au xénon, chambre d'essai d'humidité alternée à haute et basse température, chambre d'essai à température et humidité constantes, ainsi que chambre d'essai d'humidité à haute et basse température et chambre d'essai de pluie à vitesse de vent élevée et autres équipements d'essai climatiques et environnementaux et personnalisation Le produit est à la à l'avant-garde au niveau national et international. Bienvenue aux nouveaux et anciens clients à nous contacter pour toute demande de renseignements. Nous nous efforcerons de vous servir !
Modules solaires CA et micro-onduleurs 1La puissance de sortie globale du panneau de cellules solaires est considérablement réduite, principalement en raison de certains dommages au module (grêle, pression du vent, vibration du vent, pression de la neige, coup de foudre), des ombres locales, de la saleté, de l'angle d'inclinaison, de l'orientation, des différents degrés de vieillissement, petites fissures... Ces problèmes entraîneront un désalignement de la configuration du système, entraînant une réduction des défauts d'efficacité de sortie, difficiles à surmonter avec les onduleurs centralisés traditionnels. Ratio des coûts de production d'énergie solaire : module (40 ~ 50 %), construction (20 ~ 30 %), onduleur (
Modules solaires à courant alternatif et micro-onduleurs 2Spécification de test du module AC :Certification ETL : UL 1741, norme CSA 22.2, norme CSA 22.2 n° 107.1-1, IEEE 1547, IEEE 929Module photovoltaïque : UL1703Bulletin : 47CFR, partie 15, classe BIndice de surtension : IEEE 62.41 classe BCode national de l'électricité : NEC 1999-2008Dispositifs de protection contre les arcs : IEEE 1547Ondes électromagnétiques : BS EN 55022, FCC Classe B selon CISPR 22B, EMC 89/336/EEG, EN 50081-1, EN 61000-3-2, EN 50082-2, EN 60950Micro-onduleur (Micro-onduleur) : UL1741-calss ATaux de défaillance typique des composants : MIL HB-217FAutres spécifications :CEI 503, CEI 62380 IEEE1547, IEEE929, IEEE-P929, IEEE SCC21, ANSI/NFPA-70 NEC690.2, NEC690.5, NEC690.6, NEC690.10, NEC690.11, NEC690.14, NEC690.17, NEC690 .18, NEC690.64Principales spécifications du module solaire AC :Température de fonctionnement : -20 ℃ ~ 46 ℃, -40 ℃ ~ 60 ℃, -40 ℃ ~ 65 ℃, -40 ℃ ~ 85 ℃, -20 ~ 90 ℃Tension de sortie : 120/240 V, 117 V, 120/208 VFréquence de puissance de sortie : 60 HzAvantages des modules AC :1. Essayez d'augmenter la production d'énergie de chaque module de puissance de l'onduleur et suivez la puissance maximale, car le point de puissance maximale d'un seul composant est suivi, la production d'énergie du système photovoltaïque peut être considérablement améliorée, qui peut être augmentée de 25 % .2. En ajustant la tension et le courant de chaque rangée de panneaux solaires jusqu'à ce que tous soient équilibrés, afin d'éviter toute inadéquation du système.3. Chaque module dispose d'une fonction de surveillance pour réduire les coûts de maintenance du système et rendre le fonctionnement plus stable et fiable.4. La configuration est flexible et la taille des cellules solaires peut être installée sur le marché domestique en fonction des ressources financières de l'utilisateur.5. Pas de haute tension, plus sûr à utiliser, facile à installer, plus rapide, faible coût de maintenance et d'installation, réduit la dépendance vis-à-vis des fournisseurs de services d'installation, de sorte que le système d'énergie solaire puisse être installé par les utilisateurs eux-mêmes.6. Le coût est similaire voire inférieur à celui des onduleurs centralisés.7. Installation facile (temps d’installation réduit de moitié).8. Réduisez les coûts d’approvisionnement et d’installation.9. Réduire le coût global de la production d’énergie solaire.10. Aucun programme spécial de câblage et d’installation.11. La panne d'un seul module AC n'affecte pas les autres modules ou systèmes.12. Si le module est anormal, l'interrupteur d'alimentation peut être automatiquement coupé.13. Seule une simple procédure d'interruption est requise pour la maintenance.14. Peut être installé dans n'importe quelle direction et n'affectera pas les autres modules du système.15. Il peut remplir tout l’espace de réglage, à condition qu’il soit placé en dessous.16. Réduisez le pont entre la ligne CC et le câble.17. Réduisez les connecteurs DC (connecteurs DC).18. Réduisez la détection des défauts à la terre CC et réglez les dispositifs de protection.19. Réduisez les boîtes de jonction CC.20. Réduisez la diode de dérivation du module solaire.21. Il n’est pas nécessaire d’acheter, d’installer et d’entretenir de gros onduleurs.22. Pas besoin d’acheter des piles.23. Chaque module est installé avec un dispositif anti-arc qui répond aux exigences de la spécification UL1741.24. Le module communique directement via le fil de sortie d'alimentation CA sans configurer une autre ligne de communication.25. 40 % de composants en moins.
Modules solaires à courant alternatif et micro-onduleurs 3Méthode de test du module AC :1. Test de performance de sortie : équipement de test de module existant, pour les tests liés au module non onduleur2. Test de contrainte électrique : effectuez un test de cycle de température dans différentes conditions pour évaluer les caractéristiques de l'onduleur dans des conditions de température de fonctionnement et de température de veille.3. Test de contrainte mécanique : découvrez le micro-onduleur à faible adhérence et le condensateur soudé sur la carte PCB4. Utilisez un simulateur solaire pour les tests globaux : un simulateur solaire à impulsions en régime permanent de grande taille et avec une bonne uniformité est requis5. Test extérieur : enregistrement de la courbe IV de sortie du module et de la courbe de conversion de l'efficacité de l'onduleur dans un environnement extérieur6. Test individuel : chaque composant du module est testé séparément dans la salle et le bénéfice global est calculé par la formule7. Test d'interférence électromagnétique : étant donné que le module comporte un composant onduleur, il est nécessaire d'évaluer l'impact sur EMC&EMI lorsque le module fonctionne sous le simulateur de lumière solaire.Causes courantes de défaillance des modules AC :1. La valeur de la résistance est incorrecte2. La diode est inversée3. Causes de défaillance de l'onduleur : défaillance du condensateur électrolytique, humidité, poussièreConditions de test du module AC :Test HAST : 110℃/85 %R.H./206h (Laboratoire National Sandia)Test haute température (UL1741) : 50℃, 60℃Cycle de température : -40℃←→90℃/200cycleCongélation humide : 85℃/85 %R.H.←→-40℃/10cycles, 110 cycles (test Enphase-ALT)Test de chaleur humide : 85℃/85 %R.H/1000hTests de pression environnementale multiples (MEOST) : -50 ℃ ~ 120 ℃, vibration 30G ~ 50GÉtanchéité : NEMA 6/24 heuresTest foudre : Surtension tolérée jusqu'à 6 000 VAutres (voir UL1703) : test de pulvérisation d'eau, test de résistance à la traction, test anti-arcMTBF des modules liés à l'énergie solaire :Onduleur traditionnel 10 ~ 15 ans, micro-onduleur 331 ans, module PV 600 ans, micro-onduleur 600 ans [futur]Introduction du micro-onduleur :Instructions : micro-onduleur (micro-onduleur) appliqué au module solaire, chaque module solaire CC est équipé d'un, peut réduire la probabilité d'apparition d'un arc, le micro-onduleur peut directement via le fil de sortie d'alimentation CA, communication réseau directe, il suffit d'installer une alimentation. Pont Ethernet de ligne (Powerline Ethernet Bridge) sur la prise, pas besoin de configurer une autre ligne de communication, les utilisateurs peuvent via la page Web de l'ordinateur, iPhone, blackberry, tablette... Etc., regarder directement l'état de fonctionnement de chaque module (puissance de sortie, température du module, message de défaut, code d'identification du module), s'il y a une anomalie, elle peut être réparée ou remplacée immédiatement, afin que l'ensemble du système d'énergie solaire puisse fonctionner sans problème, car le micro-onduleur est installé derrière le module, ainsi l'effet de vieillissement des ultraviolets sur le micro-onduleur est également faible.Spécifications du micro-onduleur :UL 1741 CSA 22.2, CSA 22.2, n° 107.1-1 IEEE 1547 IEEE 929 FCC 47CFR, partie 15, classe B Conforme au National Electric Code (NEC 1999-2008) EIA-IS-749 (test de durée de vie des applications majeures corrigé, spécification pour utilisation de condensateur)Test du micro-onduleur :1. Test de fiabilité du micro-onduleur : poids du micro-onduleur + 65 livres * 4 fois2. Test d'étanchéité du micro-onduleur : NEMA 6 [fonctionnement continu de 1 mètre dans l'eau pendant 24 heures]3. Congélation humide selon la méthode de test IEC61215 : 85℃/85%R.H.←→-45℃/110 jours4. Test de durée de vie accéléré du micro-onduleur [110 jours au total, test dynamique à la puissance nominale, garantit que le micro-onduleur peut durer plus de 20 ans] :Étape 1 : Congélation humide : 85℃/85%R.H.←→-45℃/10 joursÉtape 2 : Cycle de température : -45℃←→85℃/50 joursÉtape 3 : Chaleur humide : 85℃/85 %R.H./50 jours
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