This part of GB/T 17614 is applicable to transmitters with standardized analog current output signals or standardized air pressure output signals that comply with IEC 60381-1 or IEC 60382. The tests described in this section are also applicable to transmitters with other output signals (provided that their differences are considered in advance). For the evaluation of smart transmitters, see IEC 60770-3. For some transmitters that use integrated sensor components (such as chemical analyzers, flow meters, etc.), it may be necessary to refer to other national standards and specifications. This section aims to provide a unified test method for the performance evaluation of gas or electrical output signal transmitters. The evaluation methods specified in this section are intended for manufacturers to determine the performance of their products and for users or independent testing institutions to verify the manufacturer's product performance specifications. The test conditions described in this section, such as the ambient temperature range and supply source, are representative conditions that can usually be encountered in use. Therefore, when the manufacturer does not specify other values, the values specified in this section should be used. The tests specified in this section may not fully meet the requirements of transmitters designed specifically for special environments or safety related applications. On the contrary, a limited series of tests may be applicable to transmitters designed to operate under certain limited conditions. When it is not necessary to conduct a comprehensive evaluation according to this section, the required tests can be conducted according to the relevant provisions of this section and the test results can be reported. The following normative references are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. IEC 60050-300:2001 International Electrotechnical Terminology - Electrotechnical and Electronic Measurement and Instrumentation - Part 311: General Terms Related to Measurement, Part 312: General Terms Related to Electronic Measurement, Part 313: Types of Electronic Measurement Instruments - Part 314: Characteristic Terminology of Instrument Types IEC 60068-2-1:2007 Environmental Testing, Part 2-1:; Test method, Test A; Environmental testing Part 2-1: Tests - Test A: Cold IEC 60068-2-2; 1974: Environmental testing: Part 2-2: Test methods Test B; Environmental testing Part 2-2: Tests B: Dry heat IEC 60068-2-31:2008 Environmental testing Part 2-32: Test methods, Test Ee: Dip and overturn (mainly used for equipment type samples) (Analogue signals for process control systems - Part 1: Direct current signals)
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