71.02-1991

Environmental Conditions for Process Measurement and Control Systems: Power

71.02-1991 发布历史

This standard classifies power parameters that affect industrial process measurement and control equipment. Specifications for other environmental conditions are beyond the scope of this standard. The classes of environmental conditions stated in this standard are suitable for use in activities related to process instrumentation@ including design@ manufacture@ sales@ installation@ test@ use@ and maintenance. These classifications pertain only to power as received by the equipment. The effects of power conditions on safety@ comfort@ and performance of operating and maintenance personnel are not considered in this standard. Certain types of pressure regulators derive their operating power from the pressure of the controlled fluid. Similarly@ certain types of temperature regulators derive pressure for valve operation from thermal expansion of the fluid in the temperature-sensing element. These self-operated and process-powered devices are not considered within the scope of this publication. Purpose The purpose of this standard is to establish uniform classifications of power supplied to process measurement and control equipment. The classification system provides users and manufacturers of instruments with a means of specifying the electrical or pneumatic parameters of a power system to which a specified measurement or control system may be connected. This document is one of a series of standards on environmental conditions for process measurement and control systems. CAUTION: THIS DOCUMENT IS NOT INTENDED TO SERVE AS A SAFE WIRING PRACTICES MANUAL

71.02-1991由ISA - International Society of Automation 发布于 1991-06-01，并于 2001-07-12 实施。

71.02-1991的历代版本如下：

• 1991年06月01日 71.02-1991

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标准号

71.02-1991

发布日期

1991年06月01日

实施日期

2001年07月12日

废止日期

无

中国标准分类号

/

国际标准分类号

/

发布单位

ISA - International Society of Automation

引用标准

16

适用范围

This standard classifies power parameters that affect industrial process measurement and control equipment. Specifications for other environmental conditions are beyond the scope of this standard. The classes of environmental conditions stated in this standard are suitable for use in activities related to process instrumentation@ including design@ manufacture@ sales@ installation@ test@ use@ and maintenance. These classifications pertain only to power as received by the equipment. The effects of power conditions on safety@ comfort@ and performance of operating and maintenance personnel are not considered in this standard. Certain types of pressure regulators derive their operating power from the pressure of the controlled fluid. Similarly@ certain types of temperature regulators derive pressure for valve operation from thermal expansion of the fluid in the temperature-sensing element. These self-operated and process-powered devices are not considered within the scope of this publication. Purpose The purpose of this standard is to establish uniform classifications of power supplied to process measurement and control equipment. The classification system provides users and manufacturers of instruments with a means of specifying the electrical or pneumatic parameters of a power system to which a specified measurement or control system may be connected. This document is one of a series of standards on environmental conditions for process measurement and control systems. CAUTION: THIS DOCUMENT IS NOT INTENDED TO SERVE AS A SAFE WIRING PRACTICES MANUAL