GB/T 12519-2021General specification of analytical instruments (English PDF)

4.1 Classification

4.1.1 Classification by test principle According to the test principle, it is divided into electrochemical instruments, optical instruments, chromatographic instruments, mass spectrometers, spectral instruments, energy spectrum and radiation instruments, thermal instruments, etc.

4.1.2 Classification by application occasions According to the application occasions, it is divided into laboratory instruments, portable or mobile instruments, online or process instruments, etc.

4.2 Naming

4.2.1 Naming principles The naming of analytical instrument products mainly considers the test principle and the measuring object, and appropriately takes into account the habits.

4.2.2 Naming of instruments The meaning and naming method of "meter", "analyzer", "microscope", "system" and "instrument" are as follows:

a) Special analytical instruments that measure the mass of a single substance (excluding gas) and assign values should be called "meter", such as pH meter, salt meter, viscometer, etc.;

b) Instruments that measure gas can be called "analyzer", such as carbon monoxide analyzer, carbon dioxide analyzer, etc.;

c) Analytical instruments that study the morphology of the surface of substances by analyzing images can be called "microscopes", such as transmission electron microscopes, scanning electron microscopes, etc.;

d) Analytical instruments that are composed of sample processing, analytical instruments, data management and auxiliary facilities, etc. (or parts) to achieve the whole process from sample extraction to output of analytical results are generally called "systems", such as air quality monitoring systems, water quality monitoring systems, etc.;

e) Analytical instruments other than a), b),

d) are usually (or generally) called "instruments";

f) Safety alarm instruments that only have sound and light warnings are generally called "alarms"; those with other display methods are generally called "explosion detectors, testers, and detectors."

6.1 Test conditions

6.1.1 Test working conditions The instrument shall be tested under the following test conditions.

a) It shall clearly specify the various environmental conditions during the test;

b) When there are special requirements, it shall specify reference conditions.

6.1.2 Test equipment

6.1.2.1 The uncertainty (or maximum allowable error) of the measuring equipment, standard substances (or physical standard samples, working standard samples), etc. used in the test shall be better than the uncertainty (or maximum allowable error) of the tested instrument and shall be within the validity period of verification or calibration.

6.1.2.2 The uncertainty of the measuring equipment, standard substances (or physical standard samples, working standard samples), etc. used in the test shall not exceed one- third of the indication error specified by the instrument. At this time, the error generated by the measurement test can be ignored.

6.1.2.3 When the uncertainty of the measuring equipment, standard substances (or physical standard samples, working standard samples), etc. used in the test is greater than one-third of the absolute value of the maximum allowable error of the instrument, the error generated by the measurement test cannot be ignored and shall be handled according to the following principles.

a) If an instrument is rated with a limit uncertainty of ±e % for a given performance characteristic, and the uncertainty of the instrument used by the manufacturer for test is ±n %, the tested uncertainty shall be kept within the limit of ±(e +

b) Similarly, if the uncertainty of the customer using another test instrument to measure the same instrument is ±m %, and the uncertainty obtained by the instrument exceeds the limit of ±e %, it shall still be kept within the limit of ±(e +

c) If a standard substance (or physical standard sample, working standard sample) with a confidence level of 95 % and an uncertainty of ±m % is used to test the instrument, its uncertainty shall be within ±(e +

6.1.3 Tested instrument status For instruments that have preheating requirements or stabilization time requirements after power is turned on, formal measurements and observations shall be carried out after the specified preheating requirements or stabilization time.

6.1.4 Test sequence If the test sequence has a non-negligible impact on the test results, it shall be specified.

6.2 Appearance and structure Visual and manual inspection.

6.3 Functional inspection According to the product standards, the implementation of each function can be checked during the performance characteristics test.

6.4 Performance characteristics test

d) manufacturing date;

e) technical parameters that must be marked;

f) other information specified in relevant laws and regulations.

8.2 Packaging

8.2.1 The instrument packaging shall comply with the provisions of GB/T 13384.

8.2.2 The markings on the packaging box shall be clear and firm, and the contents are as follows:

a) manufacturer name, address, and contact information;

b) instrument name, model, and specifications;

c) overall dimensions. length × width × height, in millimeters (mm); gross weight and net weight, in kilograms (kg);

d) factory-exit number, packaging box serial number, quantity, and factory-exit date;

e) pictorial marking for handling of goods on packaging. "FRAGILE", "THIS WAY UP", "KEEP AWAY FROM RAIN", etc. shall comply with the provisions of GB/T 191-2008.

8.2.3 Accompanying documents, including.

a) packing list;

b) product certificate;

c) instructions for use, in accordance with GB/T 9969, for safety warnings, see Clause 5 of GB 4793.1-2007;

d) spare parts list, etc.

8.3 Transportation For instruments with special requirements for transportation, their transportation requirements shall be specified, and they shall generally be protected from strong impact, rain, and exposure.

Note 1. 2. **Search (Optional).** Enter the keyword '**GB/T 12519-2021**' in the search bar, if it is not already shown. 3.