Views: 235 Author: Wendy Publish Time: 2023-08-16 Origin: Site
The purpose of a temperature and humidity test chamber, also known as an environmental test chamber, is to assess a product's quality and dependability under various environmental circumstances, particularly temperature and humidity.
Researchers from a variety of fields, including electronic, electrical, communication, automotive, medical, aerospace, and more, frequently use temperature and humidity test chambers.
Consider a project your business is working on to evaluate a new product in various environmental settings. You are tasked with finding a temperature and humidity test chamber that can conduct the test.A number of things need to be taken into account before choosing the optimal temperature and humidity chamber.You may use the information in this article to make more informed judgments. I'm going to give you 6 things to think about before choosing or making a decision.
First and foremost, a key consideration when choosing a chamber is the temperature range. Wide temperature range chambers with various structural and insulating designs are available from manufacturers. A typical temperature chamber can typically range from -70°C to 150°C.
It is feasible to modify the chamber if your test calls for a temperature that is higher than the norm. Make sure your chamber provider has the test information, though. The kind of refrigeration system required depends on the absolute minimum temperature required for your tests.
Temperature and water vapor pressure in the test chamber affect relative humidity (RH). The technology might be able to achieve high relative humidity at low temperatures with less water vapor. On the other hand, to achieve high relative humidity at a higher temperature, more water vapor is needed.
Most test chambers have a defined temperature-humidity range of 10°C to 85°C and 10% to 98% RH. The lowest temperature that the chamber may reach before dew or fog start to form has a restriction. Typically, 10°C is used as the test chamber dew point. The chilled coil in the test chamber is never set to 10°C or lower than freezing in order to prevent the formation of frost.
When testing at different temperatures, there are many types of profiles. These tests can be divided into the following 3 categories:
It is set for a certain period of time at a specific temperature for testing at constant temperature. In contrast, during a test of temperature cycling, different temperatures may be present for varying lengths of time.
Rapid temperature testing is carried out with temperatures changing at a significantly higher rate, i.e. up to 20°C per minute, similar to the temperature test cycle described above. ESS (environmental stress screening), HALT (highly accelerated stress test), and HASS (highly accelerated stress screening) are other names for this examination that are frequently used.The purpose of this test is to provide you the opportunity to assess the product's quality in the face of abrupt temperature changes.
The airflow inside the chamber must be designed by the chamber manufacturer to have enough volume to move the part temperature more rapidly toward the air temperature.
During thermal shock testing, products are repeatedly exposed to extremely low and high temperatures at a rapid transition rate. This test accelerates the stress that a product would experience under normal use from thermal shocks.
At a rate of more than 15°C per minute, the temperature changes from cold to hot quite quickly.
Typically, thermal shock test chambers can be divided into 3 zone or 2 zone chambers.
The hot temperature zone, cold temperature zone, and test zone make up a three-zone thermal shock chamber. The product is set up in the test area, and hot and cold air from the appropriate chambers are alternately blown in.
Some equipment has 2 separate hot and cold compartments (2 zones), and the items are transported between these 2 compartments using an elevator mechanism.
Buyers almost seldom consider the internal dimensions of the chamber. Most people erroneously believe that as long as the product can fit into the chamber, regardless of its size, chamber performance is not affected by the available space.
It is crucial to understand that the chamber needs to have enough airflow volume to guarantee effective airflow.
Therefore, it is preferable to get a slightly larger chamber than one that is too tiny.
The size and dimension options are many and flexible to meet your needs. Small benchtop chambers and walk-in chambers are also possible test chamber sizes.
A seasoned producer will consistently inquire about the test specimen and quantity from a prospective customer.
The manufacturer can propose the optimal chamber for your application based on your response.
The testing setup could take many different forms, and the chamber manufacturer will consider the product attributes and testing requirements while constructing the chamber's construction.
The most important thing is to tell your chamber provider every aspect of your tests.
A refrigeration system is used to cool the air inside the chamber. The condenser is used to release the heat that the refrigeration system extracted.
Condensers can be either water- or air-cooled, and these two varieties are the most common. Each has advantages and disadvantages.
Small chambers typically include air cooling as a basic feature. Due to the air-cooled condenser's integration within the chamber, this configuration is particularly practical in terms of mobility and space savings.
The heat is dispersed into the room where the chamber is located, on the other hand. As a result, the room's air conditioning system must be capable of handling the extra heat load produced by the chamber.
Second, it's important to pay attention to any nearby soil. The condenser is close to the ground, making it simple to pick up dirt. The condenser must therefore be cleaned frequently.
If the chamber is placed in a polluted environment, water cooling may be a viable option. A water-cooled system often has the condenser outside.
However, installing a water-cooled system is more difficult and expensive. For this kind of system, refrigeration piping, water tower mounting, electrical wiring, and water supply works are necessary. Installation may be messy and expensive, as you can see.