SIS SS IEC 654-1-1982 过程控制．操作条件．温度，湿度及大气压力

标准号：SIS SS IEC 654-1-1982
中文标准名称：过程控制．操作条件．温度，湿度及大气压力
英文标准名称：Process control — Operating conditions — Temperature, humidity and barometric pressure
发布日期：1982/4/1 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：Part 1 of the standard lists temperature and temperature gradient, humidity and barometric pressure conditions in specifled locations to which land-based and off-shore industrial-process measurement and control systems or parts of systems may be exposed during operation, during periods when they are installed but inactive, and during storage or transportation. Maintenance and repair conditions are not considered.Operating conditions directly related to fire and explosion hazards and conditions related to nuclear radiation are likewise not considered.Standard atmospheric conditions for test purposes are given in IEC Publication 68-1, Basic Environmental Testing Procedures, Part 1: General (1978).The influence quantities considered in this part are limited to those which may directly affect performance of process systems. Effects of the specific operating conditions on personnel are not within the scope of this part. Only operating conditions as such are considered; the effects of these conditions on instrumentation are specifically excluded.This part establishes limit values, or sets of limit values, for the operating conditions listed. Other operating conditions, including those for which values are difficult both to denne and to measure, and for which adequate standards are not known to exist will be covered in other parts of the standard. An example of an operating condition difficult to denne is corrosive atmos-pheres, which are difficult to classify due to the wide variety and concentration of corrosive substances and combinations of substances which may be encountered.Note — Similar questions are at present being studied by Technical Committee No. 75, Classification of Environmental Conditions. Upon the issue of this committee's publication, the present publication should be reconsidered.