1 environmental test equipment manufacturing and production has been going on for decades the development of the basic technology (eg cooling, dehumidification, heating) has matured. With the progress and development of industrial technology, many new applications constantly introduced into the environment test equipment, such as computer technology, fuzzy control theory. Each manufacturer integrated decades of experience in the production of manufacturing equipment and its working principle, applied technology, and even the structure, materials, and so have many similarities. However, due to environmental test equipment "many non-standard, multi-variety, small batch" mode of production constraints, product reliability has always been troubled by domestic and foreign manufacturers of a problem. Lies manufacturers must manage fine, craft complete, complete detection methods on quality seriously. Meanwhile, environmental test equipment is a durable, some problems and design flaws need to be exposed to years of use, can be found through statistical analysis of the problem. A mature, high-reliability products often take years to improve and perfect. Therefore, environmental testing equipment manufacturer with a certain production scale and production history, products with high reliability, one of the necessary conditions.

2 production process quality control. Domestic production process quality control has greatly improved. Production process quality control management level with manufacturers, producing the way, the argument is passed the ISO quality control of the production process of a sign in a standardized, in addition to domestic and foreign production temperature and humidity test equipment manufacturers in the production aspects of climate and environment test accumulated a wealth of experience, as to how to choose the factory, there are some worthy of attention and consideration.

(1) cost-effective.

on the technical parameters of environmental testing equipment, reliability, based on adequate research, cost is an important factor that should be considered. Environmental testing equipment imported without exception, are sold through agents in the country, the price factor depends not only on the manufacturer's costs and profits, also contains many intermediate expenses and sales commission. Under the same manufacturing costs, lower intermediate costs are an important factor in reducing the price of the order, the same technical specifications relevant products, the manufacturing cost is roughly equivalent products in different countries even if there will not be much different.

(2) the extent to meet user needs and abilities.

user when ordering equipment, mainly experimental work needs to be done according to the needs of a choice, many of which are non-standard requirements, then the manufacturer can meet the test requirements and the degree of satisfaction, but also reflects the manufacturers ability to reflect, Users will also be an important factor of concern.

(3) service and device troubleshooting capabilities.

equipment in the course of long-term use is inevitable there will be some failures, if there are problems the user can enjoy the timely maintenance service, or can be based on the device itself has the ability to quickly determine fault diagnosis approach failed , the equipment to restore performance back into use. In this regard, domestic and foreign manufacturers have been or are to make positive efforts, such as the maintenance of a rapid reaction force, such as an increase in the computer control system fault diagnosis and early warning system software, users can provide information according to the computer as soon as possible treatment failure.