GB/T 38620-2020 Methods of evaluating the performance of ultrasonic levelmeter

GB/T 17614.1-2015 Transmitters for use in industrial-process control systems—Part 1:Methods for performance evaluation GB/T 18271.2-2017 Process measurement and control devices—General methods and procedures for evaluating performance—Part 2:Tests under reference conditions GB/T 18271.3-2017 Process measurement and control devices—General methods and procedures for evaluating performance—Part 3:Tests for the effects of influence quantities GB/T 38615-2020 General specification of ultrasonic levelmeter GB 3836.1-2000 Electrical apparatus for explosive gas atmospheres—Part 1:General requirements GB 3836.1-2010 Explosive atmospheres—Part 1:Equipment—General requirements GB/T 3836.1-2021 Explosive atmospheres—Part 1:Equipment—General requirements GB 3836.2-2000 Electrical apparatus for explosive gas atmospheres—Part 2:Flameproof enclosure “d” GB 3836.2-2010 Explosive atmospheres—Part 2:Equipment protection by flameproof enclosures "d" GB/T 3836.2-2021 Explosive atmospheres—Part 2:Equipment protection by flameproof enclosures “d” GB 3836.4-2000 Electrical apparatus for explosive gas atmospheres—Part 4:Intrinsic safety“i” GB 3836.4-2010 Explosive atmospheres—Part 4:Equipment protection by intrinsic safety "i" GB/T 3836.4-2021 Explosive atmospheres—art 4:Equipment protection by intrinsic safety “i” GB 3836.9-1990 Electrical apparatus for explosive atmospheres Encapsulated electrical apparatus "m" GB 3836.9-2006 Electrical apparatus for explosive gas atmospheres—Part 9:Encapsulation "m" GB 3836.9-2014 Explosive atmospheres—Part 9:Equipment protection by type of protection “m” GB/T 3836.9-2021 Explosive atmospheres—Part 9:Equipment protection by encapsulation “m” GB 3836.20-2010 Explosive atmospheres—Part 20:Equipment with equipment protection level (EPL) Ga GB 4208-1993 Degrees of protection provided by enclosure (IP code) GB/T 4208-2008 Degrees of protection provided by enclosure(IP code) GB/T 4208-2017 Degrees of protection provided by enclosure(IP code) GB/T 16511-1996 Electrical and electronic measuring equipment—Documentation GB/T 16842-1997 Test probes to verify protection by enclosures GB/T 16842-2008 Protection of persons and equipment by enclosures—Probe for verification GB/T 16842-2016 Protection of persons and equipment by enclosures—Probe for verification GB/T 17212-1998 Industrial-process measurement and control—Terms and definitions GB/T 17626.2-1998 Electromagnetic compatibility—Testing and measurement techniques—Electrostatic discharge immunity test GB/T 17626.2-2006 Electromagnetic compatibility—Testing and measurement techniques—Electrostatic discharge immunity test GB/T 17626.2-2018 Electromagnetic compatibility—Testing and measurement techniques—Electrostatic discharge immunity test GB/T 17626.3-1998 Electromagnetic compatibility—Testing and measurement techniques-Radiated, radio-frequency, electromagnetic field immunity test GB/T 17626.3-2006 Electromagnetic compatibility—Testing and measurement techniques—Radiated, radio-frequency, electromagnetic field immunity test GB/T 17626.3-2016 Electromagnetic compatibility—Testing and measurement techniques—Radiated,radio-frequency,electromagnetic field immunity test GB/T 17626.3-2023 Electromagnetic compatibility—Testing and measurement techniques—Part 3:Radiated,radio-frequency,electromagnetic field immunity test GB/T 17626.4-1998 Electromagnetic compatibility—Testing and measurement techniques—Electrical fast transient/burst immunity test GB/T 17626.4-2008 Electromagnetic compatibility—Testing and measurement techniques—Electrical fast transient/burst immunity test GB/T 17626.4-2018 Electromagnetic compatibility—Testing and measurement techniques—Electrical fast transient/burstimmunity test GB/T 17626.5-1999 Electromagnetic compatibility—Testing and measurement techniques—Surge immunity test GB/T 17626.5-2008 Electromagnetic compatibility—Testing and measurement techniques—Surge immunity test GB/T 17626.5-2019 Electromagnetic compatibility—Testing and measurement techniques—Surge immunity test GB/T 17626.6-1998 Electromagnetic compatibility—Testing and measurement techniques—Immunity to conducted disturbances, induced by radio-frequency fields GB/T 17626.6-2008 Electromagnetic compatibility—Testing and measurement techniques—Immunity to conducted disturbances,induced by radio-frequency fields GB/T 17626.6-2017 Electromagnetic compatibility—Testing and measurement techniques—Immunity to conducted disturbances,induced by radio-frequency fields GB/T 17626.8-1998 Electromagnetic compatibility—Testing and measurement techniques—Power frequency magnetic field immunity test GB/T 17626.8-2006 Electromagnetic compatibility—Testing and measurement techniques—Power frequency magnetic field immunity test GB/T 17626.11-1999 Electromagnetic compatibility—Testing and measurement techniques—Voltage dips, short interruptions and voltage variations immunity tests GB/T 17626.11-2008 Electromagnetic compatibility—Testing and measurement techniques—Voltage dips,short interruptions and voltage variations immunity tests GB/T 17626.11-2023 Electromagnetic compatibility—Testing and measurement techniques—Part 11:Voltage dips, short interruptions and voltage variations immunity tests for equipment with input current up to 16 A per phase GB/T 18271.4-2000 Process measurement and control devices—General methods and procedures for evaluating performance—Part 4:Evaluation report content GB/T 18271.4-2017 Process measurement and control devices—General methods and procedures for evaluating performance—Part 4:Evaluation report content GB/T 25480-2010 Basic environmental conditions and testing methods for transportation and storage of instruments