Vaisala HM70 Hand-Held Humidity and Temperature Meter

RTCA/DO-160 Section 10 analyzes how aircraft responds to water under normal conditions and consists of the following tests: Condensing Water Drip Proof Test (Category Y) Drip Proof Test (Category W) Spray Proof Test (Category R) Continuous Stream Proof Test (Category S) Of the four tests, ATEC rents chambers to complete testing for Category Y. This condensing water test requires the use of two temperature and humidity chambers; chamber 1 set to -10° C and chamber 2 set to 40° with 85% relative humidity. The equipment under test is placed (non-operating) into chamber 1 for three hours, then transferred to chamber 2 and operated for 10 minutes. Upon completion, the equipment is evaluated to determine compliance.     Equipment Categories Category Y Equipment that is installed in locations where it is subjected to condensing water in the course of normal aircraft operations. Category W Equipment that is installed in locations where it is subjected to falling water (generally the result of condensation) in the course of normal aircraft operations. Category R Equipment installed in locations where it may be subjected to a driving rain or where water may be sprayed on it from any angle. Category S Equipment installed in locations where it may be subjected to the forces of a heavy stream of fluid such as would be encountered in aircraft de-icing, washing or cleaning operations.

Significance: This practice provides a method for conditioning packaging systems using climatic conditions that occur in actual distribution. The recommended exposure levels are based on available information on shipping, handling and storage environments, current industry practices, and published studies. They are not absolute extremes, but rather recorded daily averages in cold and hot climates of the world. Scope: This practice provides a uniform basis for evaluating, in a laboratory, the ability of a packaging system to withstand a range of climatic stresses that a packaging system may be exposed to during distribution throughout the world and still provide the product protection from damage or alteration. Download Standard