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, Superior-Bad mit konstanter Temperatur (800 l)SpezifikationenProjektTypSerieＥＸＴFunktionTemperatur entsteht in gewisser WeiseTrockenballmethodeTemperaturventilator Yin-70 ～ + 150 ℃Temperatur-OvulationsamplitudeUnterhalb der + 100℃± 0,3 ℃Über + 101℃± 0,5 ℃TemperaturverteilungUnterhalb der + 100℃± 0,7 ℃Über + 101℃± 1,0 ℃Die Temperatur verringert die Zeit＋125 ～－55 ℃Innerhalb von 36 Minuten (10℃/Minute mittlere Temperaturänderung)Temperaturanstiegszeit－55 ～＋125 ℃Innerhalb von 36 Minuten (10℃/Minute mittlere Temperaturänderung)Das Innenvolumen der Gebärmutter wurde getestet800ＬTestraum-Zoll-Methode (Breite, Tiefe und Höhe)1000 mm × 800 mm × 1000 mmProdukt-Zoll-Methode (Breite, Tiefe und Höhe)1470 mm × 2240 mm × 2000 mmMachen Sie das Material Äußeres Outfit Bedienfeld für den PrüfraumMaschinenraumKalte interduktile Stahlplatte ist dunkelgrauInnenEdelstahlplatte (SUS304,2B poliert)Defektes WärmematerialTesten Sie die GebärmutterHartes KunstharzGlaswolleTürHarte Kunstharzschaum-Baumwolle, GlasbaumwolleProjektTypSerieＥＸＴKühlendes Entfeuchtungsgerät AbkühlmethodeMechanischer Abschnittsschrumpfungs- und Gefriermodus und binärer Gefriermodus KühlmediumEinzelsegmentseiteR404ABinäre Hochtemperatur-/NiedertemperaturseiteR404A ／ R23Kühlung und LuftentfeuchterMehrkanaliger gemischter KühlkörpertypDer Kondensator(wassergekühlt)KaloriererBildenHeizgerät aus hitzebeständiger Nickel-Chrom-LegierungGebläseBildenVentilator umrühren ControllerlDie Temperatur ist eingestellt-72,0 ～ +152,0 ℃Zeiteinstellung Fanny0 ～ 999 Zeit 59 Minuten (programmierter Typ)0 ～ 20000 Zeit 59 Minuten (Wert)Zersetzungsenergie einstellen Temperatur 0,1 ℃, Zeit von 1 MinuteGeben Sie die Genauigkeit anTemperatur ± 0,8℃ (typ.), Zeit ± 100 PPMUrlaubsartWert oder ProgrammEtappennummer20 Stufen / 1 ProgrammDie Anzahl der VerfahrenDie maximale Anzahl eingehender Kraftprogramme (RAM) beträgt 32 ProgrammeDie maximale Anzahl interner ROM-Programme beträgt 13 ProgrammeHin- und RückfahrtnummerMaximal 98 oder unbegrenztAnzahl der Roundtrip-WiederholungenMaximal 3 MalVerschieben Sie das EndePt 100Ω (bei 0 ℃), Klasse (JIS C 1604-1997)KontrollaktionBeim Aufteilen der PID-AktionEndovirus-FunktionFrühzeitige Lieferfunktion, Standby-Funktion, Einstellwert-Wartungsfunktion, Stromausfall-Schutzfunktion,Power-Action-Auswahlfunktion, Wartungsfunktion, Transport-Round-Trip-Funktion,Zeitlieferfunktion, Zeitsignalausgabefunktion, Überhitzungs- und Überkühlungsschutzfunktion,Abnormale Darstellungsfunktion, externe Alarmausgangsfunktion, Einstellungsparadigmendarstellungsfunktion,Funktion zur Auswahl des Transporttyps, die Berechnungszeit stellt die Funktion dar, die SchlitzlampenlampenfunktionProjektTypSerieＥＸＴBedienfeldAusrüstungsmaschineLCD-Bedienfeld (Typ Kontaktpanel),Steht für Lampe (Strom, Transport, abnormal), Teststromversorgungsanschluss, externen Alarmanschluss,Zeitsignal-Ausgangsanschluss, Netzkabelanschluss SchutzvorrichtungKühlkreislaufÜberlastschutzgerät, HochblockiergerätKaloriererTemperaturüberschreitungsschutzvorrichtung, TemperatursicherungGebläseÜberlastschutzgerätBedienfeldFehlerstromschutzschalter für Stromversorgung, Sicherung (Heizung),Sicherung (für die Betriebsschleife), Temperaturanstiegsschutzgerät (für Tests),Gerät zur Verhinderung von Überkühlung bei Temperaturanstieg (Testmaterial, im Mikrocomputer)Die Bezahlung gehört zum ProduktTestmaterial vergoss um * 8Edelstahlschuppen (2), Schuppenaufnahme (4)SicherungSicherungen zum Schutz der Betriebsschleife (2)Betriebsspezifikation(1) AndersBolus (Kabelloch: 1)AusrüstungsprodukteAdventitiaHartes Borosilikatglas 270 mm × 190 mm１ KabellochBohrungsgröße 50 mm１ Die Wanne im Inneren der LampeAC100V 15W Weiße heiße Kugel１ Rad 6 Horizontale Anpassung 6 Eigenschaften des ElektrovirusQuelle ＊ 5.1Wechselstrom Dreiphasig 380V 50HzMaximaler Laststrom60 AKapazität des Fehlerstromschutzschalters für die Stromversorgung80ASensorischer Strom 30mADicke der Stromverteilung60mm２Gummi-IsolierschlauchGrobheit des Erdungskabels14mm２ Kühlwasser ＊ 5.3Wasserertrag5000 l/h (bei einer Kühlwassereintrittstemperatur von 32 °C)Wasserdruck0,1 ～ 0,5 MPaSeitenrohrdurchmesser des GerätesPT1 1/4 Schläuche Abflussrohr ＊ 5.4PT1/2Produktgewicht700kg
Vertikale Temperaturschock-Testkammer mit großem VolumenDurch die abwechselnde Bewegung des Prüflings zwischen der Kaltkammer und der Heißkammer kann die Temperaturschockprüfkammer eine sehr, sehr schnelle Temperaturänderungsrate auf den Prüfling ausüben, die mögliche Fehler aufdecken und auch zur Definition des Prüflings nutzen kann Lebensdauer des Prüflings.Die Temperaturschock-Testkammer des Modells Lab Companion TS-2 wird hauptsächlich für schwere Lasten verwendet. Aufgrund seiner kompakten Bauweise und geringen Stellfläche empfiehlt es sich besonders für den Einsatz in Produktionslinien.Lab Companion verfügt über eine Forschungseinrichtung, die sich auf die Entwicklung von Umwelttestgeräten spezialisiert hat und über ausgereifte Forschungsmethoden und Labore für Umwelttests verfügt. Es hat eine Gruppe hervorragender Talente und bekannter Experten der Branche versammelt, und ein starkes Forschungs- und Entwicklungsteam leitet die Entwicklungsrichtung der heimischen Umweltprüftechnologie. Derzeit verfügt das Unternehmen über unabhängige geistige Eigentumsrechte für Umweltprüfgeräte, Zuverlässigkeitsprüfgeräte, Prüfkammern für hohe und niedrige Temperaturen, Prüfkammern für Luftfeuchtigkeit bei hohen und niedrigen Temperaturen, Prüfkammern für konstante Temperatur und Luftfeuchtigkeit, Prüfkammern für schnelle Temperaturwechsel, Prüfkammern für Kalt- und Heißschlagversuche, drei umfassende Prüfkammern, Prüfkammern für hohe und niedrige Temperaturen und niedrigen Druck, Prüfkammern für Sonneneinstrahlung, Industrie Öfen, Kalt- und Heißschlagprüfkammern, begehbare Prüfkammern mit konstanter Temperatur und Luftfeuchtigkeit, Prüfkammern für Umweltstressprüfungen, begehbare Prüfkammern mit konstanter Temperatur und Luftfeuchtigkeit, Schlagprüfkammern mit hoher und niedriger Temperatur. Box, Prüfmaschine für konstante Temperatur und Luftfeuchtigkeit, Prüfbox für konstante Temperatur und Luftfeuchtigkeit, Prüfbox für Sonneneinstrahlung, Prüfkammer für hohe und niedrige Luftfeuchtigkeit, Temperatur- und Feuchtigkeitskontrollkammer, UV-Testmaschine für beschleunigte Alterung, UV-Testmaschine für beschleunigte Witterungsbeständigkeit, begeh- in Prüfkammer, begehbare Umweltprüfkammer, begehbare Hoch- und Niedertemperatur-Prüfkammer, Temperatur- und Feuchtigkeitskontrollprüfkammer, UV-Klimabeständigkeitsprüfkammer, UV-Alterungstester, Hoch- und Niedertemperatur-Niederdruck-Prüfkammer, Schnelltemperatur Zyklische Testkammer, begehbare Testkammer für konstante Temperatur und Luftfeuchtigkeit, begehbare Testkammer für hohe und niedrige Luftfeuchtigkeit, Präzisionsofen, programmierbare Testkammer für konstante Temperatur und Luftfeuchtigkeit, programmierbare Testmaschine für konstante Temperatur und Luftfeuchtigkeit, Alterungstestkammer für Xenonlampen, Testkammer für wechselnde Luftfeuchtigkeit bei hohen und niedrigen Temperaturen, Testkammer für konstante Temperatur und Luftfeuchtigkeit sowie begehbare Testkammer für Luftfeuchtigkeit bei hohen und niedrigen Temperaturen und Regentestkammer bei hoher Windgeschwindigkeit sowie andere Geräte und Anpassungen für Klima- und Umwelttests Spitzenreiter im In- und Ausland auf erstklassigem Niveau. Begrüßen Sie neue und alte Kunden, um uns für Anfragen zu kontaktieren. Wir werden uns für Sie einsetzen!
AC-Solarmodule und Mikrowechselrichter 1Die Gesamtausgangsleistung des Solarzellenmoduls ist stark reduziert, hauptsächlich aufgrund einiger Modulschäden (Hagel, Winddruck, Windvibrationen, Schneedruck, Blitzeinschlag), lokaler Schatten, Schmutz, Neigungswinkel, Ausrichtung, unterschiedlicher Alterungsgrade, kleine Risse... Diese Probleme führen zu einer Fehlausrichtung der Systemkonfiguration, was zu Mängeln bei der verringerten Ausgangseffizienz führt, die bei herkömmlichen Zentralwechselrichtern nur schwer zu beheben sind. Kostenverhältnis der Solarstromerzeugung: Modul (40 ~ 50 %), Bau (20 ~ 30 %), Wechselrichter (
AC-Solarmodule und Mikrowechselrichter 2Testspezifikation für Wechselstrommodule:ETL-Zertifizierung: UL 1741, CSA Standard 22.2, CSA Standard 22.2 Nr. 107.1-1, IEEE 1547, IEEE 929PV-Modul: UL1703Newsletter: 47CFR, Teil 15, Klasse BSpannungsstoßfestigkeit: IEEE 62.41 Klasse BNational Electrical Code: NEC 1999-2008Lichtbogenschutzgeräte: IEEE 1547Elektromagnetische Wellen: BS EN 55022, FCC Klasse B gemäß CISPR 22B, EMC 89/336/EEG, EN 50081-1, EN 61000-3-2, EN 50082-2, EN 60950Mikro-Wechselrichter (Mikro-Wechselrichter): UL1741-Klasse ATypische Komponentenausfallrate: MIL HB-217FWeitere Spezifikationen:IEC 503, IEC 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, NEC690.64Hauptspezifikationen des AC-Solarmoduls:Betriebstemperatur: -20℃ ~ 46℃, -40℃ ~ 60℃, -40℃ ~ 65℃, -40℃ ~ 85℃, -20 ~ 90℃Ausgangsspannung: 120/240 V, 117 V, 120/208 VAusgangsfrequenz: 60 HzVorteile von AC-Modulen:1. Versuchen Sie, die Stromerzeugung jedes Wechselrichter-Leistungsmoduls zu erhöhen und die maximale Leistung zu verfolgen. Da der maximale Leistungspunkt einer einzelnen Komponente verfolgt wird, kann die Stromerzeugung der Photovoltaikanlage erheblich verbessert werden, was um 25 % gesteigert werden kann .2. Durch Anpassen der Spannung und des Stroms jeder Reihe von Solarmodulen, bis alle im Gleichgewicht sind, um eine Fehlanpassung des Systems zu vermeiden.3. Jedes Modul verfügt über eine Überwachungsfunktion, um die Wartungskosten des Systems zu senken und den Betrieb stabiler und zuverlässiger zu machen.4. Die Konfiguration ist flexibel und die Solarzellengröße kann entsprechend den finanziellen Ressourcen des Benutzers auf dem Haushaltsmarkt installiert werden.5. Keine Hochspannung, sicherer in der Anwendung, einfach zu installieren, schneller, geringer Wartungs- und Installationsaufwand, verringert die Abhängigkeit von Installationsdienstleistern, sodass die Solarstromanlage von den Benutzern selbst installiert werden kann.6. Die Kosten sind ähnlich oder sogar niedriger als bei Zentralwechselrichtern.7. Einfache Installation (Installationszeit um die Hälfte reduziert).8. Reduzieren Sie die Beschaffungs- und Installationskosten.9. Reduzieren Sie die Gesamtkosten der Solarstromerzeugung.10. Kein spezielles Verkabelungs- und Installationsprogramm.11. Der Ausfall eines einzelnen AC-Moduls hat keine Auswirkungen auf andere Module oder Systeme.12. Wenn das Modul abnormal ist, kann der Netzschalter automatisch abgeschaltet werden.13. Für die Wartung ist lediglich eine einfache Unterbrechungsprozedur erforderlich.14. Kann in jede Richtung installiert werden und hat keinen Einfluss auf andere Module im System.15. Es kann den gesamten Stellraum ausfüllen, solange es darunter platziert wird.16. Reduzieren Sie die Brücke zwischen DC-Leitung und Kabel.17. DC-Anschlüsse (DC-Anschlüsse) reduzieren.18. Reduzieren Sie die DC-Erdschlusserkennung und setzen Sie Schutzvorrichtungen ein.19. DC-Anschlusskästen reduzieren.20. Reduzieren Sie die Bypass-Diode des Solarmoduls.21. Es besteht keine Notwendigkeit, große Wechselrichter zu kaufen, zu installieren und zu warten.22. Keine Notwendigkeit, Batterien zu kaufen.23. Jedes Modul ist mit einer Lichtbogenschutzvorrichtung ausgestattet, die den Anforderungen der UL1741-Spezifikation entspricht.24. Das Modul kommuniziert direkt über das AC-Ausgangskabel, ohne eine weitere Kommunikationsleitung einzurichten.25. 40 % weniger Komponenten.
AC-Solarmodule und Mikrowechselrichter 3Testmethode für Wechselstrommodule:1. Ausgangsleistungstest: Die vorhandenen Modultestgeräte für nicht-wechselrichterbezogene Modultests2. Elektrischer Belastungstest: Führen Sie einen Temperaturzyklustest unter verschiedenen Bedingungen durch, um die Eigenschaften des Wechselrichters unter Betriebstemperatur- und Standby-Temperaturbedingungen zu bewerten3. Mechanischer Belastungstest: Ermitteln Sie den Mikrowechselrichter mit schwacher Haftung und den auf der Leiterplatte verschweißten Kondensator4. Verwenden Sie einen Sonnensimulator für Gesamttests: Es ist ein stationärer Impuls-Sonnensimulator mit großer Größe und guter Gleichmäßigkeit erforderlich5. Außentest: Zeichnen Sie die I-V-Kurve des Modulausgangs und die Umrechnungskurve des Wechselrichterwirkungsgrads in einer Außenumgebung auf6. Einzeltest: Jede Komponente des Moduls wird einzeln im Raum getestet und der Gesamtnutzen anhand der Formel berechnet7. Elektromagnetischer Interferenztest: Da das Modul über eine Wechselrichterkomponente verfügt, müssen die Auswirkungen auf EMV und EMI bewertet werden, wenn das Modul unter dem Sonnenlichtsimulator betrieben wird.Häufige Ausfallursachen von AC-Modulen:1. Der Widerstandswert ist falsch2. Die Diode ist invertiert3. Ursachen für einen Ausfall des Wechselrichters: Ausfall des Elektrolytkondensators, Feuchtigkeit, StaubTestbedingungen für AC-Module:HAST-Test: 110℃/85%R.H./206h (Sandia National Laboratory)Hochtemperaturtest (UL1741): 50℃, 60℃Temperaturzyklus: -40℃←→90℃/200ZyklenNassgefrieren: 85℃/85 % relative Luftfeuchtigkeit←→-40℃/10 Zyklen, 110 Zyklen (Enphase-ALT-Test)Nasshitzetest: 85℃/85%R.H/1000hMehrere Umgebungsdrucktests (MEOST): -50℃ ~ 120℃, 30G ~ 50G VibrationWasserdicht: NEMA 6/24 StundenBlitztest: Zulässige Stoßspannung bis 6000 VAndere (siehe UL1703): Wassersprühtest, Zugfestigkeitstest, LichtbogentestMTBF solarbezogener Module:Herkömmlicher Wechselrichter 10 ~ 15 Jahre, Mikro-Wechselrichter 331 Jahre, PV-Modul 600 Jahre, Mikro-Wechselrichter 600 Jahre[Zukunft]Einführung des Mikrowechselrichters:Anleitung: Mikro-Wechselrichter (Mikro-Wechselrichter) wird auf das Solarmodul angewendet, jedes DC-Solarmodul ist mit einem ausgestattet, kann die Wahrscheinlichkeit des Auftretens von Lichtbögen verringern, Mikro-Wechselrichter können direkt über das AC-Ausgangskabel angeschlossen werden, direkte Netzwerkkommunikation, es muss nur eine Stromversorgung installiert werden Line-Ethernet-Brücke (Powerline-Ethernet-Brücke) an der Steckdose, keine Notwendigkeit, eine weitere Kommunikationsleitung einzurichten, Benutzer können über die Computer-Webseite, iPhone, Blackberry, Tablet-Computer usw. direkt den Betriebszustand jedes Moduls beobachten (Leistungsabgabe, Modultemperatur, Fehlermeldung, Modulidentifikationscode), wenn eine Anomalie auftritt, kann diese sofort repariert oder ausgetauscht werden, sodass die gesamte Solarstromanlage reibungslos funktionieren kann, da der Mikrowechselrichter hinter dem Modul installiert ist. Daher ist auch der Alterungseffekt von Ultraviolett auf den Mikrowechselrichter gering.Spezifikationen des Mikrowechselrichters:UL 1741 CSA 22.2, CSA 22.2, Nr. 107.1-1 IEEE 1547 IEEE 929 FCC 47CFR, Teil 15, Klasse B Konform mit dem National Electric Code (NEC 1999-2008) EIA-IS-749 (Korrigierter Lebensdauertest für Hauptanwendungen, Spezifikation für Kondensatoreinsatz)Mikro-Wechselrichter-Test:1. Zuverlässigkeitstest des Mikrowechselrichters: Gewicht des Mikrowechselrichters +65 Pfund *4-mal2. Wasserdichtigkeitstest des Mikro-Wechselrichters: NEMA 6 [1 Meter Dauerbetrieb in Wasser für 24 Stunden]3. Nassgefrieren gemäß IEC61215-Testmethode: 85℃/85%R.H.←→-45℃/110 Tage4. Beschleunigter Lebensdauertest des Mikro-Wechselrichters [insgesamt 110 Tage, dynamischer Test bei Nennleistung, hat sichergestellt, dass der Mikro-Wechselrichter eine Lebensdauer von mehr als 20 Jahren haben kann]:Schritt 1: Nassgefrieren: 85℃/85%R.H.←→-45℃/10 TageSchritt 2: Temperaturzyklus: -45℃←→85℃/50 TageSchritt 3: Feuchte Hitze: 85℃/85 % relative Luftfeuchtigkeit/50 Tage
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