Once we have selected the most suitable chamber volume, it is time to select the positive and negative temperature ranges to perform the tests. In this case we will focus on the positive temperature ranges that an environmental test chamber can have, i.e. heating.
The climatic chambers have a heating system based on electrical resistors that generate heat, placing a greater number of resistors will increase the heat generated and therefore the upper range of temperatures and higher heating rates.
Normally the standards indicate the positive test temperature, but sometimes it is the sample itself that will mark the maximum temperature range it can withstand. Always select a maximum temperature range in which you will be working.
Depending on the application for which the chamber is to be used:
• +50 ⁰C. A range for environmental stability testing where the product is subjected to the normal ambient temperatures it will encounter throughout its lifetime. It is used for pharmaceutical industry, biotechnology or in some construction materials testing. Its insulation is usually expanded polyurethane.
• +85ºC. They are modular type chambers or intended for industries where it is not necessary large upper temperature limits such as. These chambers will use polyurethane as insulation.
• +150 or 180 ⁰C. Most of the chambers have this temperature range. It is a dedicated range for industrial sector like automotive, electronics, aeronautics, etc. The insulation shall be composed of mineral wool. These ranges should not be exceeded due to the risk of overheating of the cooling oil.
• +200 °C. Range for thermal shock chambers. As both test chambers (hot and cold) are separated, the cooling limit of the cooling oil may be exceeded.
• ≥ +200 °C. This range is used for stoves, ovens or muffles that do not have a cooling system. This allows the upper temperature limit to be raised.
For more information, please
contact us by email: comercial@dycometal.com
or on our website: www.dycometal.com
.
DYCOMETAL, a
company with more than 40 years of experience in the development of simulation
chambers for environmental testing, offers its customers ENVIRONMENTAL TESTING SOLUTIONS ADAPTED TO THEIR NEEDS.
