This part of GB/T 22264 specifies general test conditions, intrinsic error, variation, electrical requirements, mechanical requirements, climate influence, electrical safety requirements, electromagnetic compatibility and mean time between failures test methods.
This part is applicable to the following mounted digital display electric measuring instruments measuring electric parameters:
——ammeters and voltmeters;
——wattmeters and varmeters;
——power factor meters and phase meters;
——insulation resistance meters;
——frequency meters.
and multi-function instruments in random combination of above forms; it is also applicable to digital display part of dual analogue-digital display electric measuring instruments.
This part is not applicable to:
——electric measuring instruments only provided with direct acting indicating analogue.
——portable digital display electric measuring instruments.
——the instruments for special purpose specified in national standard (or professional standard).
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of GB/T 22264. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this part. However parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 2423.1-2008 Environmental Testing for Electric and Electronic and Electronic Products - Part 1: Test Methods - Tests A: Cold (IEC 60068-2-1:2007, IDT)
GB/T 2423.2-2008 Environmental Testing - Part 2: Test Methods - Tests B: Dry Heat (IEC 60068-2-2:2007, IDT)
GB/T 2423.4-2008 Environmental Testing for Electric and Electronic Products - Part 2: Test Method - Test Db: Damp Heat, Cyclic (12h+12h Cycle) (IEC 60068-2-30:2005, IDT)
GB/T 2423.5-1995 Environmental Testing for Electric and Electronic Products - Part 2: Test Methods - Test Ea and Guidance: Shock (idt IEC 60068-2-27:1987)
GB/T 2423.10-2008 Environmental Testing for Electric and Electronic Products - Part 2: Test Methods - Test Fc and Guidance: Vibration (Sinusoidal) (IEC 60068-2-6:1995, IDT)
GB/T 2423.37-2006 Environmental Testing for Electric and Electronic Products - Part 2: Test Methods - Test L: Dust and Sand (IEC 60068-2-68:1994, IDT)
GB/T 2423.38-2008 Environmental Test for Electric and Electronic Products - Part 2: Test method - Test R: Water Test Method and Guidance (IEC 60068-2-18:2000, IDT)
GB 4208-2008 Degrees of Protection Provided by Enclosure (IP Code) (IEC 60529:2001, IDT)
GB 4793.1-2007 Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use - Part 1: General Requirements (IEC 61010-1:2001, IDT)
GB/T 5169.10-2006 Fire Hazard Testing for Electric and Electronic Products - Part 10: Glow/Hot-wire Based Test Methods - Glow-wire Apparatus and Common Test Procedure (IEC 60695-2-10:2000, IDT)
GB 9254-2008 Information Technology Equipment - Radio Disturbance Characteristics - Limits and Methods of Measurement (CISPR 22:2006, IDT)
GB/T 17626.2-2006 Electromagnetic Compatibility (EMC) - Testing and Measurement Techniques - Electrostatic Discharge Immunity Test (IEC 61000-4-2:2001, IDT)
GB/T 17626.3-2006 Electromagnetic Compatibility - Testing and Measurement Techniques - Radiated Radio-frequency Electromagnetic Field Immunity Test (IEC 61000-4-3:2002, IDT)
GB/T 17626.4-2008 Electromagnetic Compatibility - Testing and Measurement Techniques - Electrical Fast Transient/Burst Immunity Test (IEC 61000-4-4:2004, IDT)
